Articles | Volume 14, issue 4
https://doi.org/10.5194/bg-14-921-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-14-921-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
28 Feb 2017
Research article |
| 28 Feb 2017
Multi-frequency electrical impedance tomography as a non-invasive tool to characterize and monitor crop root systems
Maximilian Weigand
CORRESPONDING AUTHOR
Department of Geophysics, University of Bonn, Meckenheimer
Allee 176, 53115 Bonn, Germany
Andreas Kemna
Department of Geophysics, University of Bonn, Meckenheimer
Allee 176, 53115 Bonn, Germany
Related authors
Maximilian Weigand, Egon Zimmermann, Valentin Michels, Johan Alexander Huisman, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 11, 413–433, https://doi.org/10.5194/gi-11-413-2022, https://doi.org/10.5194/gi-11-413-2022, 2022
Short summary
Short summary
The construction, operation and analysis of a spectral electrical
impedance tomography (sEIT) field monitoring setup with high spatial and temporal resolution are presented. Electromagnetic induction errors are corrected, allowing the recovery of images of in-phase conductivity and electrical polarisation of up to 1 kHz.
Maximilian Weigand, Florian M. Wagner, Jonas K. Limbrock, Christin Hilbich, Christian Hauck, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 9, 317–336, https://doi.org/10.5194/gi-9-317-2020, https://doi.org/10.5194/gi-9-317-2020, 2020
Short summary
Short summary
In times of global warming, permafrost is starting to degrade at alarming rates, requiring new and improved characterization approaches. We describe the design and test installation, as well as detailed data quality assessment, of a monitoring system used to capture natural electrical potentials in the subsurface. These self-potential signals are of great interest for the noninvasive investigation of water flow in the non-frozen or partially frozen subsurface.
Theresa Maierhofer, Adrian Flores Orozco, Nathalie Roser, Jonas K. Limbrock, Christin Hilbich, Clemens Moser, Andreas Kemna, Elisabetta Drigo, Umberto Morra di Cella, and Christian Hauck
EGUsphere, https://doi.org/10.5194/egusphere-2023-671, https://doi.org/10.5194/egusphere-2023-671, 2023
Short summary
Short summary
In this study, we apply an electrical method in a high mountain permafrost terrain in the Italian Alps, where long-term borehole temperature data are available for validation. In particular, we investigate the frequency dependence of the electrical properties for seasonal and annual variations along three years monitoring period. We demonstrate that our method is capable of resolving temporal changes in the thermal state and the ice/water ratio associated with seasonal freeze-thaw processes.
Maximilian Weigand, Egon Zimmermann, Valentin Michels, Johan Alexander Huisman, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 11, 413–433, https://doi.org/10.5194/gi-11-413-2022, https://doi.org/10.5194/gi-11-413-2022, 2022
Short summary
Short summary
The construction, operation and analysis of a spectral electrical
impedance tomography (sEIT) field monitoring setup with high spatial and temporal resolution are presented. Electromagnetic induction errors are corrected, allowing the recovery of images of in-phase conductivity and electrical polarisation of up to 1 kHz.
Theresa Maierhofer, Christian Hauck, Christin Hilbich, Andreas Kemna, and Adrián Flores-Orozco
The Cryosphere, 16, 1903–1925, https://doi.org/10.5194/tc-16-1903-2022, https://doi.org/10.5194/tc-16-1903-2022, 2022
Short summary
Short summary
We extend the application of electrical methods to characterize alpine permafrost using the so-called induced polarization (IP) effect associated with the storage of charges at the interface between liquid and solid phases. We investigate different field protocols to enhance data quality and conclude that with appropriate measurement and processing procedures, the characteristic dependence of the IP response of frozen rocks improves the assessment of thermal state and ice content in permafrost.
Maximilian Weigand, Florian M. Wagner, Jonas K. Limbrock, Christin Hilbich, Christian Hauck, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 9, 317–336, https://doi.org/10.5194/gi-9-317-2020, https://doi.org/10.5194/gi-9-317-2020, 2020
Short summary
Short summary
In times of global warming, permafrost is starting to degrade at alarming rates, requiring new and improved characterization approaches. We describe the design and test installation, as well as detailed data quality assessment, of a monitoring system used to capture natural electrical potentials in the subsurface. These self-potential signals are of great interest for the noninvasive investigation of water flow in the non-frozen or partially frozen subsurface.
Sathyanarayan Rao, Félicien Meunier, Solomon Ehosioke, Nolwenn Lesparre, Andreas Kemna, Frédéric Nguyen, Sarah Garré, and Mathieu Javaux
Biogeosciences Discuss., https://doi.org/10.5194/bg-2018-280, https://doi.org/10.5194/bg-2018-280, 2018
Revised manuscript not accepted
Short summary
Short summary
This paper illustrates the impact of electrical property of maize root segments on the Electrical Resistivity Tomography (ERT) inversion results with the help of numerical model. The model includes explicit root representation in the finite element mesh with root growth, transpiration and root water uptake. We show that, ignoring root segments could lead to wrong estimation of water content using ERT method.
Klaus Haaken, Gian Piero Deidda, Giorgio Cassiani, Rita Deiana, Mario Putti, Claudio Paniconi, Carlotta Scudeler, and Andreas Kemna
Hydrol. Earth Syst. Sci., 21, 1439–1454, https://doi.org/10.5194/hess-21-1439-2017, https://doi.org/10.5194/hess-21-1439-2017, 2017
Short summary
Short summary
The paper presents a general methodology that will help understand how freshwater and saltwater may interact in natural porous media, with a particular view at practical applications such as the storage of freshwater underground in critical areas, e.g., semi-arid zones around the Mediterranean sea. The methodology is applied to a case study in Sardinia and shows how a mix of advanced monitoring and mathematical modeling tremendously advance our understanding of these systems.
Related subject area
Biogeophysics: Physical - Biological Coupling
Unique ocean circulation pathways reshape the Indian Ocean oxygen minimum zone with warming
Contribution of the open ocean to the nutrient and phytoplankton inventory in a semi-enclosed coastal sea
The contrasted phytoplankton dynamics across a frontal system in the southwestern Mediterranean Sea
Sub-frontal niches of plankton communities driven by transport and trophic interactions at ocean fronts
Differential feeding habits of the shallow-water hydrothermal vent crab Xenograpsus testudinatus correlate with their resident vent types at a scale of meters
Satellite data reveal earlier and stronger phytoplankton blooms over fronts in the Gulf Stream region
Assimilation of multiple datasets results in large differences in regional- to global-scale NEE and GPP budgets simulated by a terrestrial biosphere model
Spatiotemporal lagging of predictors improves machine learning estimates of atmosphere–forest CO2 exchange
Phytoplankton reaction to an intense storm in the north-western Mediterranean Sea
Lagrangian and Eulerian time and length scales of mesoscale ocean chlorophyll from Bio-Argo floats and satellites
Reply to Lars Olof Björn's comment on “Fundamental molecules of life are pigments which arose and co-evolved as a response to the thermodynamic imperative of dissipating the prevailing solar spectrum” by Michaelian and Simeonov (2015)
Modelling submerged biofouled microplastics and their vertical trajectories
A Bayesian sequential updating approach to predict phenology of silage maize
Using an oceanographic model to investigate the mystery of the missing puerulus
Climate pathways behind phytoplankton-induced atmospheric warming
Impact of moderately energetic fine-scale dynamics on the phytoplankton community structure in the western Mediterranean Sea
Seasonal ecosystem vulnerability to climatic anomalies in the Mediterranean
Grazing behavior and winter phytoplankton accumulation
Episodic subduction patches in the western North Pacific identified from BGC-Argo float data
Do Loop Current eddies stimulate productivity in the Gulf of Mexico?
Quasi-tropical cyclone caused anomalous autumn coccolithophore bloom in the Black Sea
Divergent climate feedbacks on winter wheat growing and dormancy periods as affected by sowing date in the North China Plain
Microclimatic comparison of lichen heaths and shrubs: shrubification generates atmospheric heating but subsurface cooling during the growing season
Fire and vegetation dynamics in northwest Siberia during the last 60 years based on high-resolution remote sensing
Evidence of eddy-related deep-ocean current variability in the northeast tropical Pacific Ocean induced by remote gap winds
Root uptake under mismatched distributions of water and nutrients in the root zone
Interactive impacts of meteorological and hydrological conditions on the physical and biogeochemical structure of a coastal system
Protists and collembolans alter microbial community composition, C dynamics and soil aggregation in simplified consumer–prey systems
Abundance and viability of particle-attached and free-floating bacteria in dusty and nondusty air
Linking tundra vegetation, snow, soil temperature, and permafrost
Drivers of the spatial phytoplankton gradient in estuarine–coastal systems: generic implications of a case study in a Dutch tidal bay
Biological and biogeochemical methods for estimating bioirrigation: a case study in the Oosterschelde estuary
Dissolved inorganic nitrogen and particulate organic nitrogen budget in the Yucatán shelf: driving mechanisms through a physical–biogeochemical coupled model
Basal thermal regime affects the biogeochemistry of subglacial systems
Influence of oceanic conditions in the energy transfer efficiency estimation of a micronekton model
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream
Stand age and species composition effects on surface albedo in a mixedwood boreal forest
Assessing the peatland hummock–hollow classification framework using high-resolution elevation models: implications for appropriate complexity ecosystem modeling
Tidal and seasonal forcing of dissolved nutrient fluxes in reef communities
Ideas and perspectives: Development of nascent autotrophic carbon fixation systems in various redox conditions of the fluid degassing on early Earth
Vertical distribution of chlorophyll in dynamically distinct regions of the southern Bay of Bengal
Remote and local drivers of oxygen and nitrate variability in the shallow oxygen minimum zone off Mauritania in June 2014
Longitudinal contrast in turbulence along a ∼ 19° S section in the Pacific and its consequences for biogeochemical fluxes
Ideas and perspectives: Strengthening the biogeosciences in environmental research networks
Imprint of Southern Ocean mesoscale eddies on chlorophyll
Grazing increases litter decomposition rate but decreases nitrogen release rate in an alpine meadow
Large- to submesoscale surface circulation and its implications on biogeochemical/biological horizontal distributions during the OUTPACE cruise (southwest Pacific)
OUTPACE long duration stations: physical variability, context of biogeochemical sampling, and evaluation of sampling strategy
Reviews and syntheses: on the roles trees play in building and plumbing the critical zone
Effects of shrub and tree cover increase on the near-surface atmosphere in northern Fennoscandia
Sam Ditkovsky, Laure Resplandy, and Julius Busecke
Biogeosciences, 20, 4711–4736, https://doi.org/10.5194/bg-20-4711-2023, https://doi.org/10.5194/bg-20-4711-2023, 2023
Short summary
Short summary
The global ocean is losing oxygen due to warming. The Indian Ocean, however, is gaining oxygen in large parts of the basin, and its naturally occurring oxygen minimum zone is not expanding. This rather unexpected response is explained by the unique ocean circulation of the Indian Ocean, which is bounded by a continent to the north but connected to the Pacific Ocean by the Indonesian Throughflow.
Qian Leng, Xinyu Guo, Junying Zhu, and Akihiko Morimoto
Biogeosciences, 20, 4323–4338, https://doi.org/10.5194/bg-20-4323-2023, https://doi.org/10.5194/bg-20-4323-2023, 2023
Short summary
Short summary
Using a numerical model, we revealed that a large proportion of nutrients in a semi-enclosed sea (Seto Inland Sea, Japan) comes from the Pacific Ocean and supports about half of the phytoplankton growth in the sea. Such results imply that the human-made management of nutrient load from land needs to consider the presence of oceanic nutrients, which act as a background concentration and are not controlled by human activities.
Roxane Tzortzis, Andrea M. Doglioli, Monique Messié, Stéphanie Barrillon, Anne A. Petrenko, Lloyd Izard, Yuan Zhao, Francesco d'Ovidio, Franck Dumas, and Gérald Gregori
Biogeosciences, 20, 3491–3508, https://doi.org/10.5194/bg-20-3491-2023, https://doi.org/10.5194/bg-20-3491-2023, 2023
Short summary
Short summary
We studied a finescale frontal structure in order to highlight its influence on the dynamics and distribution of phytoplankton communities. We computed the growth rates of several phytoplankton groups identified by flow cytometry in two water masses separated by the front. We found contrasted phytoplankton dynamics on the two sides of the front, consistent with the distribution of their abundances. Our study gives new insights into the physical and biological coupling on a finescale front.
Inès Mangolte, Marina Lévy, Clément Haëck, and Mark D. Ohman
Biogeosciences, 20, 3273–3299, https://doi.org/10.5194/bg-20-3273-2023, https://doi.org/10.5194/bg-20-3273-2023, 2023
Short summary
Short summary
Ocean fronts are ecological hotspots, associated with higher diversity and biomass for many marine organisms, from bacteria to whales. Using in situ data from the California Current Ecosystem, we show that far from being limited to the production of diatom blooms, fronts are the scene of complex biophysical couplings between biotic interactions (growth, competition, and predation) and transport by currents that generate planktonic communities with an original taxonomic and spatial structure.
Jing-Ying Wu, Siou-Yan Lin, Jung-Fu Huang, Chen-Tung Arthur Chen, Jia-Jang Hung, Shao-Hung Peng, and Li-Lian Liu
Biogeosciences, 20, 2693–2706, https://doi.org/10.5194/bg-20-2693-2023, https://doi.org/10.5194/bg-20-2693-2023, 2023
Short summary
Short summary
The shallow-water hydrothermal vents off the Kueishan Island, Taiwan, have the most extreme records of pH values (1.52), temperatures (116 °C), and H2S concentrations (172.4 mmol mol−1) in the world. White and yellow vents differ in the color and physical and chemical characteristics of emitted plumes. We found that the feeding habits of the endemic vent crabs (Xenograpsus testudinatus) are adapted to their resident vent types at a distance of 100 m, and the trans-vent movement is uncommon.
Clément Haëck, Marina Lévy, Inès Mangolte, and Laurent Bopp
Biogeosciences, 20, 1741–1758, https://doi.org/10.5194/bg-20-1741-2023, https://doi.org/10.5194/bg-20-1741-2023, 2023
Short summary
Short summary
Phytoplankton vary in abundance in the ocean over large regions and with the seasons but also because of small-scale heterogeneities in surface temperature, called fronts. Here, using satellite imagery, we found that fronts enhance phytoplankton much more where it is already growing well, but despite large local increases the enhancement for the region is modest (5 %). We also found that blooms start 1 to 2 weeks earlier over fronts. These effects may have implications for ecosystems.
Cédric Bacour, Natasha MacBean, Frédéric Chevallier, Sébastien Léonard, Ernest N. Koffi, and Philippe Peylin
Biogeosciences, 20, 1089–1111, https://doi.org/10.5194/bg-20-1089-2023, https://doi.org/10.5194/bg-20-1089-2023, 2023
Short summary
Short summary
The impact of assimilating different dataset combinations on regional to global-scale C budgets is explored with the ORCHIDEE model. Assimilating simultaneously multiple datasets is preferable to optimize the values of the model parameters and avoid model overfitting. The challenges in constraining soil C disequilibrium using atmospheric CO2 data are highlighted for an accurate prediction of the land sink distribution.
Matti Kämäräinen, Juha-Pekka Tuovinen, Markku Kulmala, Ivan Mammarella, Juha Aalto, Henriikka Vekuri, Annalea Lohila, and Anna Lintunen
Biogeosciences, 20, 897–909, https://doi.org/10.5194/bg-20-897-2023, https://doi.org/10.5194/bg-20-897-2023, 2023
Short summary
Short summary
In this study, we introduce a new method for modeling the exchange of carbon between the atmosphere and a study site located in a boreal forest in southern Finland. Our method yields more accurate results than previous approaches in this context. Accurately estimating carbon exchange is crucial for gaining a better understanding of the role of forests in regulating atmospheric carbon and addressing climate change.
Stéphanie Barrillon, Robin Fuchs, Anne A. Petrenko, Caroline Comby, Anthony Bosse, Christophe Yohia, Jean-Luc Fuda, Nagib Bhairy, Frédéric Cyr, Andrea M. Doglioli, Gérald Grégori, Roxane Tzortzis, Francesco d'Ovidio, and Melilotus Thyssen
Biogeosciences, 20, 141–161, https://doi.org/10.5194/bg-20-141-2023, https://doi.org/10.5194/bg-20-141-2023, 2023
Short summary
Short summary
Extreme weather events can have a major impact on ocean physics and biogeochemistry, but their study is challenging. In May 2019, an intense storm occurred in the north-western Mediterranean Sea, during which in situ multi-platform measurements were performed. The results show a strong impact on the surface phytoplankton, highlighting the need for high-resolution measurements coupling physics and biology during these violent events that may become more common in the context of global change.
Darren C. McKee, Scott C. Doney, Alice Della Penna, Emmanuel S. Boss, Peter Gaube, Michael J. Behrenfeld, and David M. Glover
Biogeosciences, 19, 5927–5952, https://doi.org/10.5194/bg-19-5927-2022, https://doi.org/10.5194/bg-19-5927-2022, 2022
Short summary
Short summary
As phytoplankton (small, drifting photosynthetic organisms) drift with ocean currents, biomass accumulation rates should be evaluated in a Lagrangian (observer moves with a fluid parcel) as opposed to an Eulerian (observer is stationary) framework. Here, we use profiling floats and surface drifters combined with satellite data to analyse time and length scales of chlorophyll concentrations (a proxy for biomass) and of velocity to quantify how phytoplankton variability is related to water motion.
Karo Michaelian and Aleksandar Simeonov
Biogeosciences, 19, 4029–4034, https://doi.org/10.5194/bg-19-4029-2022, https://doi.org/10.5194/bg-19-4029-2022, 2022
Short summary
Short summary
We reply to Lars Björn's critique of our article concerning the importance of photon dissipation to the origin and evolution of the biosphere. Björn doubts our assertion that organic pigments, ecosystems, and the biosphere arose out of a non-equilibrium thermodynamic imperative to increase global photon dissipation. He shows that the albedo of some non-living material is less than that of living material. We point out, however, that photon dissipation involves other factors besides albedo.
Reint Fischer, Delphine Lobelle, Merel Kooi, Albert Koelmans, Victor Onink, Charlotte Laufkötter, Linda Amaral-Zettler, Andrew Yool, and Erik van Sebille
Biogeosciences, 19, 2211–2234, https://doi.org/10.5194/bg-19-2211-2022, https://doi.org/10.5194/bg-19-2211-2022, 2022
Short summary
Short summary
Since current estimates show that only about 1 % of the all plastic that enters the ocean is floating at the surface, we look at subsurface processes that can cause vertical movement of (micro)plastic. We investigate how modelled algal attachment and the ocean's vertical movement can cause particles to sink and oscillate in the open ocean. Particles can sink to depths of > 5000 m in regions with high wind intensity and mainly remain close to the surface with low winds and biological activity.
Michelle Viswanathan, Tobias K. D. Weber, Sebastian Gayler, Juliane Mai, and Thilo Streck
Biogeosciences, 19, 2187–2209, https://doi.org/10.5194/bg-19-2187-2022, https://doi.org/10.5194/bg-19-2187-2022, 2022
Short summary
Short summary
We analysed the evolution of model parameter uncertainty and prediction error as we updated parameters of a maize phenology model based on yearly observations, by sequentially applying Bayesian calibration. Although parameter uncertainty was reduced, prediction quality deteriorated when calibration and prediction data were from different maize ripening groups or temperature conditions. The study highlights that Bayesian methods should account for model limitations and inherent data structures.
Jessica Kolbusz, Tim Langlois, Charitha Pattiaratchi, and Simon de Lestang
Biogeosciences, 19, 517–539, https://doi.org/10.5194/bg-19-517-2022, https://doi.org/10.5194/bg-19-517-2022, 2022
Short summary
Short summary
Western rock lobster larvae spend up to 11 months in offshore waters before ocean currents and their ability to swim transport them back to the coast. In 2008, there was a reduction in the number of puerulus (larvae) settling into the fishery. We use an oceanographic model to see how the environment may have contributed to the reduction. Our results show that a combination of effects from local currents and a widespread quiet period in the ocean off WA likely led to less puerulus settlement.
Rémy Asselot, Frank Lunkeit, Philip B. Holden, and Inga Hense
Biogeosciences, 19, 223–239, https://doi.org/10.5194/bg-19-223-2022, https://doi.org/10.5194/bg-19-223-2022, 2022
Short summary
Short summary
Previous studies show that phytoplankton light absorption can warm the atmosphere, but how this warming occurs is still unknown. We compare the importance of air–sea heat versus CO2 flux in the phytoplankton-induced atmospheric warming and determine the main driver. To shed light on this research question, we conduct simulations with a climate model of intermediate complexity. We show that phytoplankton mainly warms the atmosphere by increasing the air–sea CO2 flux.
Roxane Tzortzis, Andrea M. Doglioli, Stéphanie Barrillon, Anne A. Petrenko, Francesco d'Ovidio, Lloyd Izard, Melilotus Thyssen, Ananda Pascual, Bàrbara Barceló-Llull, Frédéric Cyr, Marc Tedetti, Nagib Bhairy, Pierre Garreau, Franck Dumas, and Gérald Gregori
Biogeosciences, 18, 6455–6477, https://doi.org/10.5194/bg-18-6455-2021, https://doi.org/10.5194/bg-18-6455-2021, 2021
Short summary
Short summary
This work analyzes an original high-resolution data set collected in the Mediterranean Sea. The major result is the impact of a fine-scale frontal structure on the distribution of phytoplankton groups, in an area of moderate energy with oligotrophic conditions. Our results provide an in situ confirmation of the findings obtained by previous modeling studies and remote sensing about the structuring effect of the fine-scale ocean dynamics on the structure of the phytoplankton community.
Johannes Vogel, Eva Paton, and Valentin Aich
Biogeosciences, 18, 5903–5927, https://doi.org/10.5194/bg-18-5903-2021, https://doi.org/10.5194/bg-18-5903-2021, 2021
Short summary
Short summary
This study investigates extreme ecosystem impacts evoked by temperature and soil moisture in the Mediterranean Basin for the time span 1999–2019 with a specific focus on seasonal variations. The analysis showed that ecosystem vulnerability is caused by several varying combinations of both drivers during the yearly cycle. The approach presented here helps to provide insights on the specific phenological stage of the year in which ecosystem vulnerability to a certain climatic condition occurs.
Mara Freilich, Alexandre Mignot, Glenn Flierl, and Raffaele Ferrari
Biogeosciences, 18, 5595–5607, https://doi.org/10.5194/bg-18-5595-2021, https://doi.org/10.5194/bg-18-5595-2021, 2021
Short summary
Short summary
Observations reveal that in some regions phytoplankton biomass increases during the wintertime when growth conditions are sub-optimal, which has been attributed to a release from grazing during mixed layer deepening. Measurements of grazer populations to support this theory are lacking. We demonstrate that a release from grazing when the winter mixed layer is deepening holds only for certain grazing models, extending the use of phytoplankton observations to make inferences about grazer dynamics.
Shuangling Chen, Mark L. Wells, Rui Xin Huang, Huijie Xue, Jingyuan Xi, and Fei Chai
Biogeosciences, 18, 5539–5554, https://doi.org/10.5194/bg-18-5539-2021, https://doi.org/10.5194/bg-18-5539-2021, 2021
Short summary
Short summary
Subduction transports surface waters to the oceanic interior, which can supply significant amounts of carbon and oxygen to the twilight zone. Using a novel BGC-Argo dataset covering the western North Pacific, we successfully identified the imprints of episodic shallow subduction patches. These subduction patches were observed mainly in spring and summer (70.6 %), and roughly half of them extended below ~ 450 m, injecting carbon- and oxygen-enriched waters into the ocean interior.
Pierre Damien, Julio Sheinbaum, Orens Pasqueron de Fommervault, Julien Jouanno, Lorena Linacre, and Olaf Duteil
Biogeosciences, 18, 4281–4303, https://doi.org/10.5194/bg-18-4281-2021, https://doi.org/10.5194/bg-18-4281-2021, 2021
Short summary
Short summary
The Gulf of Mexico deep waters are relatively poor in phytoplankton biomass due to low levels of nutrients in the upper layers. Using modeling techniques, we find that the long-living anticyclonic Loop Current eddies that are shed episodically from the Yucatan Channel strongly shape the distribution of phytoplankton and, more importantly, stimulate their growth. This results from the contribution of multiple mechanisms of physical–biogeochemical interactions discussed in this study.
Sergey V. Stanichny, Elena A. Kubryakova, and Arseny A. Kubryakov
Biogeosciences, 18, 3173–3188, https://doi.org/10.5194/bg-18-3173-2021, https://doi.org/10.5194/bg-18-3173-2021, 2021
Short summary
Short summary
In this paper, we show that the short-term impact of tropical cyclones can trigger the intense, long-term bloom of coccolithophores, which are major marine calcifiers playing an important role in the balance and fluxes of inorganic carbon in the ocean. In our paper, we describe the evolution of and physical reasons for such an unusual bloom observed in autumn 2005 in the Black Sea on the basis of satellite data.
Fengshan Liu, Ying Chen, Nini Bai, Dengpan Xiao, Huizi Bai, Fulu Tao, and Quansheng Ge
Biogeosciences, 18, 2275–2287, https://doi.org/10.5194/bg-18-2275-2021, https://doi.org/10.5194/bg-18-2275-2021, 2021
Short summary
Short summary
The sowing date is key to the surface biophysical processes in the winter dormancy period. The climate effect of the sowing date shift is therefore very interesting and may contribute to the mitigation of climate change. An earlier sowing date always had a higher LAI but a higher temperature in the dormancy period and a lower temperature in the growth period. The main reason was the relative contributions of the surface albedo and energy partitioning processes.
Peter Aartsma, Johan Asplund, Arvid Odland, Stefanie Reinhardt, and Hans Renssen
Biogeosciences, 18, 1577–1599, https://doi.org/10.5194/bg-18-1577-2021, https://doi.org/10.5194/bg-18-1577-2021, 2021
Short summary
Short summary
In the literature, it is generally assumed that alpine lichen heaths keep their direct environment cool due to their relatively high albedo. However, we reveal that the soil temperature and soil heat flux are higher below lichens than below shrubs during the growing season, despite a lower net radiation for lichens. We also show that the differences in microclimatic conditions between these two vegetation types are more pronounced during warm and sunny days than during cold and cloudy days.
Oleg Sizov, Ekaterina Ezhova, Petr Tsymbarovich, Andrey Soromotin, Nikolay Prihod'ko, Tuukka Petäjä, Sergej Zilitinkevich, Markku Kulmala, Jaana Bäck, and Kajar Köster
Biogeosciences, 18, 207–228, https://doi.org/10.5194/bg-18-207-2021, https://doi.org/10.5194/bg-18-207-2021, 2021
Short summary
Short summary
In changing climate, tundra is expected to turn into shrubs and trees, diminishing reindeer pasture and increasing risks of tick-borne diseases. However, this transition may require a disturbance. Fires in Siberia are increasingly widespread. We studied wildfire dynamics and tundra–forest transition over 60 years in northwest Siberia near the Arctic Circle. Based on satellite data analysis, we found that transition occurs in 40 %–85 % of burned tundra compared to 5 %–15 % in non-disturbed areas.
Kaveh Purkiani, André Paul, Annemiek Vink, Maren Walter, Michael Schulz, and Matthias Haeckel
Biogeosciences, 17, 6527–6544, https://doi.org/10.5194/bg-17-6527-2020, https://doi.org/10.5194/bg-17-6527-2020, 2020
Short summary
Short summary
There has been a steady increase in interest in mining of deep-sea minerals in the eastern Pacific Ocean recently. The ocean state in this region is known to be highly influenced by rotating bodies of water (eddies), some of which can travel long distances in the ocean and impact the deeper layers of the ocean. Better insight into the variability of eddy activity in this region is of great help to mitigate the impact of the benthic ecosystem from future potential deep-sea mining activity.
Jing Yan, Nathaniel A. Bogie, and Teamrat A. Ghezzehei
Biogeosciences, 17, 6377–6392, https://doi.org/10.5194/bg-17-6377-2020, https://doi.org/10.5194/bg-17-6377-2020, 2020
Short summary
Short summary
An uneven supply of water and nutrients in soils often drives how plants behave. We observed that plants extract all their required nutrients from dry soil patches in sufficient quantity, provided adequate water is available elsewhere in the root zone. Roots in nutrient-rich dry patches facilitate the nutrient acquisition by extensive growth, water release, and modifying water retention in their immediate environment. The findings are valuable in managing nutrient losses in agricultural systems.
Onur Kerimoglu, Yoana G. Voynova, Fatemeh Chegini, Holger Brix, Ulrich Callies, Richard Hofmeister, Knut Klingbeil, Corinna Schrum, and Justus E. E. van Beusekom
Biogeosciences, 17, 5097–5127, https://doi.org/10.5194/bg-17-5097-2020, https://doi.org/10.5194/bg-17-5097-2020, 2020
Short summary
Short summary
In this study, using extensive field observations and a numerical model, we analyzed the physical and biogeochemical structure of a coastal system following an extreme flood event. Our results suggest that a number of anomalous observations were driven by a co-occurrence of peculiar meteorological conditions and increased riverine discharges. Our results call for attention to the combined effects of hydrological and meteorological extremes that are anticipated to increase in frequency.
Amandine Erktan, Matthias C. Rillig, Andrea Carminati, Alexandre Jousset, and Stefan Scheu
Biogeosciences, 17, 4961–4980, https://doi.org/10.5194/bg-17-4961-2020, https://doi.org/10.5194/bg-17-4961-2020, 2020
Short summary
Short summary
Soil aggregation is crucial for soil functioning. While the role of bacteria and fungi in soil aggregation is well established, how predators feeding on microbes modify soil aggregation has hardly been investigated. We showed for the first time that protists modify soil aggregation, presumably through changes in the production of bacterial mucilage, and that collembolans reduce soil aggregation, presumably by reducing the abundance of saprotrophic fungi.
Wei Hu, Kotaro Murata, Chunlan Fan, Shu Huang, Hiromi Matsusaki, Pingqing Fu, and Daizhou Zhang
Biogeosciences, 17, 4477–4487, https://doi.org/10.5194/bg-17-4477-2020, https://doi.org/10.5194/bg-17-4477-2020, 2020
Short summary
Short summary
This paper reports the first estimate of the status of bacteria in long-distance-transported Asian dust, demonstrating that airborne dust, which can carry viable and nonviable bacteria on particle surfaces, is an efficient medium for constantly spreading bacteria at regional and even global scales. Such data are essential to better model and understand the roles and activities of bioaerosols in environmental evolution and climate change and the potential risks of bioaerosols to human health.
Inge Grünberg, Evan J. Wilcox, Simon Zwieback, Philip Marsh, and Julia Boike
Biogeosciences, 17, 4261–4279, https://doi.org/10.5194/bg-17-4261-2020, https://doi.org/10.5194/bg-17-4261-2020, 2020
Short summary
Short summary
Based on topsoil temperature data for different vegetation types at a low Arctic tundra site, we found large small-scale variability. Winter temperatures were strongly influenced by vegetation through its effects on snow. Summer temperatures were similar below most vegetation types and not consistently related to late summer permafrost thaw depth. Given that vegetation type defines the relationship between winter and summer soil temperature and thaw depth, it controls permafrost vulnerability.
Long Jiang, Theo Gerkema, Jacco C. Kromkamp, Daphne van der Wal, Pedro Manuel Carrasco De La Cruz, and Karline Soetaert
Biogeosciences, 17, 4135–4152, https://doi.org/10.5194/bg-17-4135-2020, https://doi.org/10.5194/bg-17-4135-2020, 2020
Short summary
Short summary
A seaward increasing chlorophyll-a gradient is observed during the spring bloom in a Dutch tidal bay. Biophysical model runs indicate the roles of bivalve grazing and tidal import in shaping the gradient. Five common spatial phytoplankton patterns are summarized in global estuarine–coastal ecosystems: seaward increasing, seaward decreasing, concave with a chlorophyll maximum, weak spatial gradients, and irregular patterns.
Emil De Borger, Justin Tiano, Ulrike Braeckman, Tom Ysebaert, and Karline Soetaert
Biogeosciences, 17, 1701–1715, https://doi.org/10.5194/bg-17-1701-2020, https://doi.org/10.5194/bg-17-1701-2020, 2020
Short summary
Short summary
By applying a novel technique to quantify organism-induced sediment–water column fluid exchange (bioirrigation), we show that organisms in subtidal (permanently submerged) areas have similar bioirrigation rates as those that inhabit intertidal areas (not permanently submerged), but organisms in the latter irrigate deeper burrows in this study. Our results expand on traditional methods to quantify bioirrigation rates and broaden the pool of field measurements of bioirrigation rates.
Sheila N. Estrada-Allis, Julio Sheinbaum Pardo, Joao M. Azevedo Correia de Souza, Cecilia Elizabeth Enríquez Ortiz, Ismael Mariño Tapia, and Jorge A. Herrera-Silveira
Biogeosciences, 17, 1087–1111, https://doi.org/10.5194/bg-17-1087-2020, https://doi.org/10.5194/bg-17-1087-2020, 2020
Short summary
Short summary
Continental shelves are the most productive areas in the ocean and can have an important impact on the nutrient cycle as well as the climate system. The one in Yucatán is the largest shelf in the Gulf of Mexico. However, its nutrient budget remains unidentifiable. Here we propose not only a general nutrient budget for the Yucatán Shelf but also the physical processes responsible for its pathway modulation through a physical–biogeochemical coupled model of the whole Gulf of Mexico.
Ashley Dubnick, Martin Sharp, Brad Danielson, Alireza Saidi-Mehrabad, and Joel Barker
Biogeosciences, 17, 963–977, https://doi.org/10.5194/bg-17-963-2020, https://doi.org/10.5194/bg-17-963-2020, 2020
Short summary
Short summary
We found that glaciers with basal temperatures near the melting point mobilize more solutes, nutrients, and microbes from the underlying substrate and are more likely to promote in situ biogeochemical activity than glaciers with basal temperatures well below the melting point. The temperature at the base of glaciers is therefore an important control on the biogeochemistry of ice near glacier beds, and, ultimately, the potential solutes, nutrients, and microbes exported from glaciated watersheds.
Audrey Delpech, Anna Conchon, Olivier Titaud, and Patrick Lehodey
Biogeosciences, 17, 833–850, https://doi.org/10.5194/bg-17-833-2020, https://doi.org/10.5194/bg-17-833-2020, 2020
Short summary
Short summary
Micronekton is an important, yet poorly known, component of the trophic chain, which partly contributes to the storage of CO2 in the deep ocean thanks to biomass vertical migrations. In this study, we characterize the ideal sampling regions to estimate the amount of biomass that undergoes theses migrations. We find that observations made in warm, nondynamic and productive waters reduce the error of the estimation by 20 %. This result should likely serve for future in situ network deployment.
Filippos Tagklis, Takamitsu Ito, and Annalisa Bracco
Biogeosciences, 17, 231–244, https://doi.org/10.5194/bg-17-231-2020, https://doi.org/10.5194/bg-17-231-2020, 2020
Short summary
Short summary
Deoxygenation of the oceans is potentially one of the most severe ecosystem stressors resulting from global warming given the high sensitivity of dissolved oxygen to ocean temperatures. Climate models suggest that despite the thermodynamic tendency of the oceans to lose oxygen, certain regions experience significant changes in the biologically driven O2 consumption, resulting in a resistance against deoxygenation. Overturning circulation changes are responsible for such a behavior.
Mohammad Abdul Halim, Han Y. H. Chen, and Sean C. Thomas
Biogeosciences, 16, 4357–4375, https://doi.org/10.5194/bg-16-4357-2019, https://doi.org/10.5194/bg-16-4357-2019, 2019
Short summary
Short summary
Using field data collected over 4 years across a range of stand ages, we investigated how seasonal surface albedo in boreal forest varies with stand age, stand structure, and composition. Our results indicate that successional change in species composition is a key driver of age–related patterns in albedo, with hardwood species associated with higher albedo. The patterns described have important implications for both climate modeling and
climate–smartboreal forest management.
Paul A. Moore, Maxwell C. Lukenbach, Dan K. Thompson, Nick Kettridge, Gustaf Granath, and James M. Waddington
Biogeosciences, 16, 3491–3506, https://doi.org/10.5194/bg-16-3491-2019, https://doi.org/10.5194/bg-16-3491-2019, 2019
Short summary
Short summary
Using very-high-resolution digital elevation models (DEMs), we assessed the basic structure and microtopographic variability of hummock–hollow plots at boreal and hemi-boreal sites primarily in North America. Using a simple model of peatland biogeochemical function, our results suggest that both surface heating and moss productivity may not be adequately resolved in models which only consider idealized hummock–hollow units.
Renee K. Gruber, Ryan J. Lowe, and James L. Falter
Biogeosciences, 16, 1921–1935, https://doi.org/10.5194/bg-16-1921-2019, https://doi.org/10.5194/bg-16-1921-2019, 2019
Short summary
Short summary
Researchers from the University of Western Australia's Oceans Institute are studying large tides (up to 12 m range) that occur in the Kimberley region of Australia. These tides flush coral reefs with water rich in nutrients, which supports the growth of reef organisms. In this paper, we show how tidal cycles and seasons control nutrient availability on reefs. This study is among the first published accounts of reefs and water quality data in the remote and pristine Kimberley region.
Sergey A. Marakushev and Ol'ga V. Belonogova
Biogeosciences, 16, 1817–1828, https://doi.org/10.5194/bg-16-1817-2019, https://doi.org/10.5194/bg-16-1817-2019, 2019
Short summary
Short summary
Among the existing theories of the autotrophic origin of life, CO2 is usually considered to be the carbon source for nascent autotrophic metabolism. However, ancestral carbon used in metabolism may have been derived from CH4 if the outflow of magma fluid to the surface of the Earth consisted mainly of methane. The hydrothermal system model is considered in the form of a phase diagram, which demonstrates the area of redox and P and T conditions favorable to development of primary methanotroph.
Venugopal Thushara, Puthenveettil Narayana Menon Vinayachandran, Adrian J. Matthews, Benjamin G. M. Webber, and Bastien Y. Queste
Biogeosciences, 16, 1447–1468, https://doi.org/10.5194/bg-16-1447-2019, https://doi.org/10.5194/bg-16-1447-2019, 2019
Short summary
Short summary
Chlorophyll distribution in the ocean remains to be explored in detail, despite its climatic significance. Here, we document the vertical structure of chlorophyll in the Bay of Bengal using observations and a model. The shape of chlorophyll profiles, characterized by prominent deep chlorophyll maxima, varies in dynamically different regions, controlled by the monsoonal forcings. The present study provides new insights into the vertical distribution of chlorophyll, rarely observed by satellites.
Soeren Thomsen, Johannes Karstensen, Rainer Kiko, Gerd Krahmann, Marcus Dengler, and Anja Engel
Biogeosciences, 16, 979–998, https://doi.org/10.5194/bg-16-979-2019, https://doi.org/10.5194/bg-16-979-2019, 2019
Short summary
Short summary
Physical and biogeochemical observations from an autonomous underwater vehicle in combination with ship-based measurements are used to investigate remote and local drivers of the oxygen and nutrient variability off Mauritania. Beside the transport of oxygen and nutrients characteristics from remote areas towards Mauritania also local remineralization of organic material close to the seabed seems to be important for the distribution of oxygen and nutrients.
Pascale Bouruet-Aubertot, Yannis Cuypers, Andrea Doglioli, Mathieu Caffin, Christophe Yohia, Alain de Verneil, Anne Petrenko, Dominique Lefèvre, Hervé Le Goff, Gilles Rougier, Marc Picheral, and Thierry Moutin
Biogeosciences, 15, 7485–7504, https://doi.org/10.5194/bg-15-7485-2018, https://doi.org/10.5194/bg-15-7485-2018, 2018
Short summary
Short summary
The OUTPACE cruise took place between New Caledonia and French Polynesia. The main purpose was to understand how micro-organisms can survive in a very poor environment. One main source of nutrients is at depth, below the euphotic layer where micro-organisms live. The purpose of the turbulence measurements was to determine to which extent turbulence may
upliftnutrients into the euphotic layer. The origin of the turbulence that was found contrasted along the transect was also determined.
Daniel D. Richter, Sharon A. Billings, Peter M. Groffman, Eugene F. Kelly, Kathleen A. Lohse, William H. McDowell, Timothy S. White, Suzanne Anderson, Dennis D. Baldocchi, Steve Banwart, Susan Brantley, Jean J. Braun, Zachary S. Brecheisen, Charles W. Cook, Hilairy E. Hartnett, Sarah E. Hobbie, Jerome Gaillardet, Esteban Jobbagy, Hermann F. Jungkunst, Clare E. Kazanski, Jagdish Krishnaswamy, Daniel Markewitz, Katherine O'Neill, Clifford S. Riebe, Paul Schroeder, Christina Siebe, Whendee L. Silver, Aaron Thompson, Anne Verhoef, and Ganlin Zhang
Biogeosciences, 15, 4815–4832, https://doi.org/10.5194/bg-15-4815-2018, https://doi.org/10.5194/bg-15-4815-2018, 2018
Short summary
Short summary
As knowledge in biology and geology explodes, science becomes increasingly specialized. Given the overlap of the environmental sciences, however, the explosion in knowledge inevitably creates opportunities for interconnecting the biogeosciences. Here, 30 scientists emphasize the opportunities for biogeoscience collaborations across the world’s remarkable long-term environmental research networks that can advance science and engage larger scientific and public audiences.
Ivy Frenger, Matthias Münnich, and Nicolas Gruber
Biogeosciences, 15, 4781–4798, https://doi.org/10.5194/bg-15-4781-2018, https://doi.org/10.5194/bg-15-4781-2018, 2018
Short summary
Short summary
Although mesoscale ocean eddies are ubiquitous in the Southern Ocean (SO), their regional and seasonal association with phytoplankton has not been quantified. We identify over 100 000 eddies and determine the associated phytoplankton biomass anomalies using satellite-based chlorophyll (Chl) as a proxy. The emerging Chl anomalies can be explained largely by lateral advection of Chl by eddies. This impact of eddies on phytoplankton may implicate downstream effects on SO biogeochemical properties.
Yi Sun, Xiong Z. He, Fujiang Hou, Zhaofeng Wang, and Shenghua Chang
Biogeosciences, 15, 4233–4243, https://doi.org/10.5194/bg-15-4233-2018, https://doi.org/10.5194/bg-15-4233-2018, 2018
Short summary
Short summary
To investigate how grazing alters litter composition, quality and decomposition, we collected litter from grazing (GP) and grazing exclusion paddocks (GEP) and incubated them in situ and across sites. Grazing increased litter N and grazing exclusion increased litter mass of palatable species and promoted SOC. Litter decomposed faster in GP and N was opposite. Site environment had more impact on litter decomposition. Results may be helpful in developing strategies to restore degraded grasslands.
Louise Rousselet, Alain de Verneil, Andrea M. Doglioli, Anne A. Petrenko, Solange Duhamel, Christophe Maes, and Bruno Blanke
Biogeosciences, 15, 2411–2431, https://doi.org/10.5194/bg-15-2411-2018, https://doi.org/10.5194/bg-15-2411-2018, 2018
Short summary
Short summary
The patterns of the large- and fine-scale surface circulation on biogeochemical and biological distributions are examined in the western tropical South Pacific (WTSP) in the context of the OUTPACE oceanographic cruise. The combined use of in situ and satellite data allows for the identification of water mass transport pathways and fine-scale structures, such as fronts, that drive surface distribution of tracers and microbial community structures.
Alain de Verneil, Louise Rousselet, Andrea M. Doglioli, Anne A. Petrenko, Christophe Maes, Pascale Bouruet-Aubertot, and Thierry Moutin
Biogeosciences, 15, 2125–2147, https://doi.org/10.5194/bg-15-2125-2018, https://doi.org/10.5194/bg-15-2125-2018, 2018
Short summary
Short summary
Oceanographic campaigns to measure biogeochemical processes popularly deploy drifters with onboard incubations to stay in a single body of water. Here, we aggregate physical data taken during such a cruise, OUTPACE, to independently test in a new approach whether the drifter really stayed in what can be considered a single biological or chemical environment. This study concludes that future campaigns would benefit from similar data collection and analysis to validate their sampling strategy.
Susan L. Brantley, David M. Eissenstat, Jill A. Marshall, Sarah E. Godsey, Zsuzsanna Balogh-Brunstad, Diana L. Karwan, Shirley A. Papuga, Joshua Roering, Todd E. Dawson, Jaivime Evaristo, Oliver Chadwick, Jeffrey J. McDonnell, and Kathleen C. Weathers
Biogeosciences, 14, 5115–5142, https://doi.org/10.5194/bg-14-5115-2017, https://doi.org/10.5194/bg-14-5115-2017, 2017
Short summary
Short summary
This review represents the outcome from an invigorating workshop discussion that involved tree physiologists, geomorphologists, ecologists, geochemists, and hydrologists and developed nine hypotheses that could be tested. We argue these hypotheses point to the essence of issues we must explore if we are to understand how the natural system of the earth surface evolves, and how humans will affect its evolution. This paper will create discussion and interest both before and after publication.
Johanne H. Rydsaa, Frode Stordal, Anders Bryn, and Lena M. Tallaksen
Biogeosciences, 14, 4209–4227, https://doi.org/10.5194/bg-14-4209-2017, https://doi.org/10.5194/bg-14-4209-2017, 2017
Short summary
Short summary
We investigate the atmospheric sensitivity to an expansion in shrub and tree cover in the northern Fennoscandia region. We applied a regional weather and climate model in evaluating biophysical effects of increased shrub cover at a fine resolution. We find that shrub cover increase causes a warming that is sensitive to the shrub and tree heights. Cooling effects include increased snow cover, cloud cover, and precipitation. We show that the net warming will likely increase in the future.
Cited articles
al Hagrey, S.: Geophysical imaging of root-zone, trunk, and moisture heterogeneity, J. Exp. Bot., 58, 839–854, https://doi.org/10.1093/jxb/erl237, 2007.
al Hagrey, S. and Petersen, T.: Numerical and experimental mapping of small root zones using optimized surface and borehole resistivity tomography, Geophysics, 76, G25–G35, https://doi.org/10.1190/1.3545067, 2011.
Alumbaugh, D. and Newman, G.: Image appraisal for 2-D and 3-D electromagnetic inversion, Geophysics, 65, 1455–1467, https://doi.org/10.1190/1.1444834, 2000.
Amato, M., Basso, B., Celano, G., Bitella, G., Morelli, G., and Rossi, R.: In situ detection of tree root distribution and biomass by multi-electrode resistivity imaging, Tree Physiol., 28, 1441–1448, https://doi.org/10.1093/treephys/28.10.1441, 2008.
Amato, M., Bitella, G., Rossi, R., Gómez, J. A., Lovelli, S., and Gomes, J. J. F.: Multi-electrode 3D resistivity imaging of alfalfa root zone, Eur. J. Agron., 31, 213–222, https://doi.org/10.1016/j.eja.2009.08.005, 2009.
Anderson, S. and Hopmans, J. (Eds.): Soil-water-root Processes: Advances in Tomography and Imaging, Soil Sci. Soc. Am., https://doi.org/10.2136/sssaspecpub61, 2013.
Anderson, W. and Higinbotham, N.: Electrical resistances of corn root segments, Plant Physiol., 57, 137–141, https://doi.org/10.1104/pp.57.2.137, 1976.
Aubrecht, L., Staněk, Z., and Koller, J.: Electrical measurement of the absorption surfaces of tree roots by the earth impedance method: 1. Theory, Tree Physiol., 26, 1105–1112, https://doi.org/10.1093/treephys/26.9.1105, 2006.
Aulen, M. and Shipley, B.: Non-destructive estimation of root mass using electrical capacitance on ten herbaceous species, Plant Soil, 355, 41–49, https://doi.org/10.1007/s11104-011-1077-3, 2012.
Barsoukov, E. and Macdonald, J. (Eds.): Impedance spectroscopy: theory, experiment, and applications, Wiley-Interscience, https://doi.org/10.1002/0471716243, 2005.
Bayford, R.: Bioimpedance tomography (electrical impedance tomography), Annual Reviews Biomedical Engineering, 8, 63–91, https://doi.org/10.1146/annurev.bioeng.8.061505.095716, 2006.
Beff, L., Günther, T., Vandoorne, B., Couvreur, V., and Javaux, M.: Three-dimensional monitoring of soil water content in a maize field using Electrical Resistivity Tomography, Hydrol. Earth Syst. Sci., 17, 595–609, https://doi.org/10.5194/hess-17-595-2013, 2013.
Benlloch-González, M., Fournier, J., and Benlloch, M.: K+ deprivation induces xylem water and K+ transport in sunflower: evidence for a co-ordinated control, J. Exp. Bot., 61, 157–164, https://doi.org/10.1093/jxb/erp288, 2010.
Binley, A. and Kemna, A.: DC resistivity and induced polarization methods, in: Hydrogeophysics, edited by: Rubin, Y. and Hubbard, S. S., Springer, the Netherlands, 129–156, https://doi.org/10.1007/1-4020-3102-5_5, 2005.
Binley, A., Slater, L., Fukes, M., and Cassiani, G.: Relationship between spectral induced polarization and hydraulic properties of saturated and unsaturated sandstone, Water Resour. Res., 41, 1–13, https://doi.org/10.1029/2005WR004202, 2005.
Boaga, J., Rossi, M., and Cassiani, G.: Monitoring soil-plant interactions in an apple orchard using 3D electrical resistivity tomography, Procedia Environmental Sciences, 19, 394–402, https://doi.org/10.1016/j.proenv.2013.06.045, 2013.
Bücker, M. and Hördt, A.: Analytical modelling of membrane polarization with explicit parametrization of pore radii and the electrical double layer, Geophys. J. Int., 194, 804–813, https://doi.org/10.1093/gji/ggt136, 2013.
Cao, Y., Repo, T., Silvennoinen, R., Lehto, T., and Pelkonen, P.: An appraisal of the electrical resistance method for assessing root surface area, J. Exp. Bot., 61, 2491–2497, https://doi.org/10.1093/jxb/erq078, 2010.
Cao, Y., Repo, T., Silvennoinen, R., Lehto, T., and Pelkonen, P.: Analysis of the willow root system by electrical impedance spectroscopy, J. Exp. Bot., 62, 351–358, https://doi.org/10.1093/jxb/erq276, 2011.
Čermák, J., Ulrich, R., Staněk, Z., Koller, J., and Aubrecht, L.: Electrical measurement of tree root absorbing surfaces by the earth impedance method: 2. Verification based on allometric relationships and root severing experiments, Tree Physiol., 26, 1113–1121, https://doi.org/10.1093/treephys/26.9.1113, 2006.
Chloupek, O.: The relationship between electric capacitance and some other parameters of plant roots, Biol. Plantarum, 14, 227–230, https://doi.org/10.1007/BF02921255, 1972.
Chloupek, O.: Die Bewertung des Wurzelsystems von Senfpflanzen auf Grund der dielektrischen Eigenschaften und mit Rücksicht auf den Endertrag, Biol. Plantarum, 18, 44–49, https://doi.org/10.1007/BF02922333, 1976.
Claassen, N. and Barber, S.: A method for characterizing the relation between nutrient concentration and flux into roots of intact plants, Plant Physiol., 54, 564–568, https://doi.org/10.1104/pp.54.4.564, 1974.
Clarkson, D., Carvajal, M., Henzler, T., Waterhouse, R., Smyth, A., Cooke, D., and Steudle, E.: Root hydraulic conductance: diurnal aquaporin expression and the effects of nutrient stress, J. Exp. Bot., 51, 61–70, https://doi.org/10.1093/jexbot/51.342.61, 2000.
Cseresnyés, I., Tünde, T., Végh, K., Anton, A., and Rajkai, K.: Electrical impedance and capacitance method: A new approach for detection of functional aspects of arbuscular mycorrhizal colonization in maize, European J. Soil Biol., 54, 25–31, https://doi.org/10.1016/j.ejsobi.2012.11.001, 2013.
Daily, W., Ramirez, A., Binley, A., and LaBrecque, D.: Electrical resistance tomography – theory and practice, in: Near-Surface Geophysics, edited by: Butler, D., Vol. 154, chap. 17, Society of Exploration Geophysicists, Tulsa, OK, 525–550, https://doi.org/10.1190/1.9781560801719.ch17, 2005.
Dalton, F.: In-situ root extent measurements by electrical capacitance methods, Plant Soil, 173, 157–165, https://doi.org/10.1007/BF00155527, 1995.
Delhon, P., Gojon, A., Tillard, P., and Passama, L.: Diurnal regulation of NO3− uptake in soybean plants I. Changes in NO3− influx, efflux, and N utilization in the plant during the day/night cycle, J. Exp. Bot., 46, 1585–1594, https://doi.org/10.1093/jxb/46.10.1585, 1995.
Dietrich, R., Bengough, A., Jones, H., and White, P.: Can root electrical capacitance be used to predict root mass in soil?, Ann. Bot., 112, 457–464, https://doi.org/10.1093/aob/mct044, 2013.
Dukhin, S. S. and Shilov, V. N.: Dielectric Phenomena and the Double Layer in Disperse Systems and Polyelectrolytes, Wiley, New York, 1974.
Dunbabin, V., Postma, J., Schnepf, A., Pagès, L., Javaux, M., Wu, L., Leitner, D., Chen, Y., Rengel, Z., and Diggle, A.: Modelling root-soil interactions using three-dimensional models of root growth, architecture and function, Plant Soil, 372, 93–124, https://doi.org/10.1007/s11104-013-1769-y, 2013.
Dvořák, M., Černohorská, J., and Janáček, K.: Characteristics of current passage through plant tissue, Biol. Plantarum, 23, 306–310, https://doi.org/10.1007/BF02895374, 1981.
Ellis, T., Murray, W., and Kavalieris, L.: Electrical capacitance of bean (Vicia faba) root systems was related to tissue density – a test for the Dalton Model, Plant Soil, 366, 575–584, https://doi.org/10.1007/s11104-012-1424-z, 2013.
Fixman, M.: Charged Macromolecules in External Fields. 2. Preliminary Remarks on the Cylinder, Macromolecules, 13, 711–716, https://doi.org/10.1021/ma60075a043, 1980.
Flores Orozco, A., Kemna, A., Oberdörster, C., Zschornack, L., Leven, C., Dietrich, P., and Weiss, H.: Delineation of subsurface hydrocarbon contamination at a former hydrogenation plant using spectral induced polarization imaging, J. Contam. Hydrol., 136, 131–144, https://doi.org/10.1016/j.jconhyd.2012.06.001, 2012a.
Flores Orozco, A., Kemna, A., and Zimmermann, E.: Data error quantification in spectral induced polarization imaging, Geophysics, 77, E227–E237, https://doi.org/10.1190/geo2010-0194.1, 2012b.
Flores Orozco, A., Williams, K., and Kemna, A.: Time-lapse spectral induced polarization imaging of stimulated uranium bioremediation, Near Surf. Geophys., 11, 531–544, https://doi.org/10.3997/1873-0604.2013020, 2013.
Friedel, S.: Resolution, stability and efficiency of resistivity tomography estimated from a generalized inverse approach, Geophys. J. Int., 153, 305–316, https://doi.org/10.1046/j.1365-246X.2003.01890.x, 2003.
Gregory, P., Hutchison, D., Read, D., Jenneson, P., Gilboy, W., and Morton, E.: Non-invasive imaging of roots with high resolution X-ray micro-tomography, in: Roots: The Dynamic Interface between Plants and the Earth, Springer, 351–359, https://doi.org/10.1023/A:1026179919689, 2003.
Günther, T. and Martin, T.: Spectral two-dimensional inversion of frequency-domain induced polarization data from a mining slag heap, J. Appl. Geophys., 135, 436–448, https://doi.org/10.1016/j.jappgeo.2016.01.008, 2016.
Heege, H.: Precision in Crop Farming: Site Specific Concepts and Sensing Methods: Applications and Results, Springer Science & Business Media, Springer, the Netherlands, 2013.
Heřmanská, A., Středa, T., and Chloupek, O.: Improved wheat grain yield by a new method of root selection, Agron. Sustain. Dev., 35, 195–202, https://doi.org/10.1007/s13593-014-0227-4, 2015.
Hose, E., Clarkson, D., Steudle, E., Schreiber, L., and Hartung, W.: The exodermis: a variable apoplastic barrier, J. Exp. Bot., 52, 2245–2264, https://doi.org/10.1093/jexbot/52.365.2245, 2001.
Huisman, J., Zimmermann, E., Esser, O., Haegel, F., Treichel, A., and Vereecken, H.: Evaluation of a novel correction procedure to remove electrode impedance effects from broadband SIP measurements, J. Appl. Geophys., 135, 466–473, https://doi.org/10.1016/j.jappgeo.2015.11.008, 2015.
Javaux, M., Couvreur, V., Vanderborght, J., and Vereecken, H.: Root water uptake: From three-dimensional biophysical processes to macroscopic modeling approaches, Vadose Zone J., 12, 1–16, https://doi.org/10.2136/vzj2013.02.0042, 2013.
Johnson, T., Slater, L., Ntarlagiannis, D., Day-Lewis, F., and Elwaseif, M.: Monitoring groundwater-surface water interaction using time-series and time-frequency analysis of transient three-dimensional electrical resistivity changes, Water Resour. Res., 48, W07506, https://doi.org/10.1029/2012WR011893, 2012.
Kelter, M., Huisman, J., Zimmermann, E., Kemna, A., and Vereecken, H.: Quantitative imaging of spectral electrical properties of variably saturated soil columns, J. Appl. Geophys., 123, 333–344, https://doi.org/10.1016/j.jappgeo.2015.09.001, 2015.
Kemna, A.: Tomographic inversion of complex resistivity – theory and application, PhD thesis, Ruhr-Universität Bochum, https://doi.org/10.1111/1365-2478.12013, 2000.
Kemna, A., Binley, A., Cassiani, G., Niederleithinger, E., Revil, A., Slater, L., Williams, K., Flores Orozco, A., Haegel, F., Hoerdt, A., Kruschwitz, S., Leroux, V., Titov, K., and Zimermann, E.: An overview of the spectral induced polarization method for near-surface applications, Near Surf. Geophys., 10, 453–468, https://doi.org/10.3997/1873-0604.2012027, 2012.
Kemna, A., Huisman, J., Zimmermann, E., Martin, R., Zhao, Y., Treichel, A., Flores Orozco, A., and Fechner, T.: Broadband electrical impedance tomography for subsurface characterization using improved corrections of electromagnetic coupling and spectral regularization, in: Tomography of the Earth's Crust: From Geophysical Sounding to Real-Time Monitoring, Springer, 1–20, https://doi.org/10.1007/978-3-319-04205-3_1, 2014.
Kinraide, T.: Use of a Gouy-Chapman-Stern model for membrane-surface electrical potential to interpret some features of mineral rhizotoxicity, Plant Physiol., 106, 1583–1592, 1994.
Kinraide, T. and Wang, P.: The surface charge density of plant cell membranes (σ): an attempt to resolve conflicting values for intrinsic σ, J. Exp. Bot., 61, 2507–2518, https://doi.org/10.1093/jxb/erq082, 2010.
Kinraide, T., Yermiyahu, U., and Rytwo, G.: Computation of surface electrical potentials of plant cell membranes correspondence to published zeta potentials from diverse plant sources, Plant Physiol., 118, 505–512, https://doi.org/10.1104/pp.118.2.505, 1998.
Kormanek, M., Gła̧b, T., and Klimek-Kopyra, A.: Modification of the tree root electrical capacitance method under laboratory conditions, Tree Physiol., 36, 121–127, https://doi.org/10.1093/treephys/tpv088, 2015.
Kruschwitz, S., Binley, A., Lesmes, D., and Elshenawy, A.: Textural controls on low-frequency electrical spectra of porous media, Geophysics, 75, WA113, https://doi.org/10.1190/1.3479835, 2010.
Kyle, A., Chan, C., and Minchinton, A.: Characterization of three-dimensional tissue cultures using electrical impedance spectroscopy, Biophys. J., 76, 2640–2648, https://doi.org/10.1016/S0006-3495(99)77416-3, 1999.
LaBrecque, D. and Ward, S.: Two-dimensional cross-borehole resistivity model fitting, Geotechnical and Environmental Geophysics, 1, 51–57, 1990.
LaBrecque, D., Ramirez, A., Daily, W., Binley, A., and Schima, S.: ERT monitoring of environmental remediation processes, Meas. Sci. Technol., 7, 375–383, https://doi.org/10.1088/0957-0233/7/3/019, 1996.
Leroy, P., Revil, A., Kemna, A., Cosenza, P., and Ghorbani, A.: Complex conductivity of water-saturated packs of glass beads, J. Colloid Interf. Sci., 321, 103–117, https://doi.org/10.1016/j.jcis.2007.12.031, 2008.
Lesmes, D. and Frye, K.: Influence of pore fluid chemistry on the complex conductivity and induced polarization responses of Berea sandstone, J. Geophys. Res., 106, 4079–4090, https://doi.org/10.1029/2000JB900392, 2001.
Li, Z., Liu, Y., Zheng, Y., and Xu, R.: Zeta potential at the root surfaces of rice characterized by streaming potential measurements, Plant Soil, 386, 237–250, https://doi.org/10.1007/s11104-014-2259-6, 2015.
Loke, M., Chambers, J., Rucker, D., Kuras, O., and Wilkinson, P.: Recent developments in the direct-current geoelectrical imaging method, J. Appl. Geophys., 95, 135–156, https://doi.org/10.1016/j.jappgeo.2013.02.017, 2013.
Lyklema, J.: Fundamentals of interface and colloid science: solid-liquid interfaces, Vol. 2, Academic press, London, UK, 2005.
Lyklema, J., Dukhin, S., and Shilov, V.: The relaxation of the double layer around colloidal particles and the low-frequency dielectric dispersion: Part I. Theoretical considerations, Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 143, 1–21, https://doi.org/10.1016/S0022-0728(83)80251-4, 1983.
Mancuso, S.: Measuring roots: an updated approach, Springer Science & Business Media, https://doi.org/10.1007/978-3-642-22067-8, Springer, Heidelberg, Dordrecht, London, New York, 2012.
Martin, T. and Günther, T.: Complex resistivity tomography (CRT) for fungus detection on standing oak trees, Eur. J. Forest Res., 132, 765–776, https://doi.org/10.1007/s10342-013-0711-4, 2013.
Martínez-Ballesta, M., Rodríguez-Hernández, M., Alcaraz-López, C., Mota-Cadenas, C., Muries, B., and Carvajal, M.: Plant hydraulic conductivity: The aquaporins contribution, Hydraulic conductivity – issues, determination and applications, Rijeka: In Tech, 103–21, https://doi.org/10.5772/18580, 2011.
Metzner, R., Eggert, A., van Dusschoten, D., Pflugfelder, D., Gerth, S., Schurr, U., Uhlmann, N., and Jahnke, S.: Direct comparison of MRI and X-ray CT technologies for 3D imaging of root systems in soil: potential and challenges for root trait quantification, Plant Meth., 11, 17, https://doi.org/10.1186/s13007-015-0060-z, 2015.
Nordsiek, S. and Weller, A.: A new approach to fitting induced-polarization spectra, Geophysics, 73, F235–F245, https://doi.org/10.1190/1.2987412, 2008.
Ozier-Lafontaine, H. and Bajazet, T.: Analysis of root growth by impedance spectroscopy (EIS), Plant Soil, 277, 299–313, https://doi.org/10.1007/s11104-005-7531-3, 2005.
Pelton, W., Ward, S., Hallof, P., Sill, W., and Nelson, P.: Mineral discrimination and removal of inductive coupling with multifrequency IP, Geophysics, 43, 588–609, https://doi.org/10.1190/1.1440839, 1978.
Pierret, A., Doussan, C., Garrigues, E., and Mc Kirby, J.: Observing plant roots in their environment: current imaging options and specific contribution of two-dimensional approaches, Agronomie, 23, 471–479, https://doi.org/10.1051/agro:2003019, 2003.
Prodan, C. and Prodan, E.: The dielectric behaviour of living cell suspensions, J. Phys. D, 32, 335–343, 1999.
Prodan, E., Prodan, C., and Miller Jr., J.: The dielectric response of spherical live cells in suspension: an analytic solution, Biophys. J., 95, 4174–4182, https://doi.org/10.1529/biophysj.108.137042, 2008.
Razilov, I. and Dukhin, S.: Simultaneous influence of concentration polarization of the diffuse layer and polarization of the Stern layer according to the mechanism of bound counterions at arbitrary magnitudes of the relaxation parameter, Colloid J. Russ. Acad., 57, 364–371, 1995.
Repo, T., Cao, Y., Silvennoinen, R., and Ozier-Lafontaine, H.: Electrical impedance spectroscopy and roots, in: Measuring Roots, edited by: Mancuso, S., Springer, 25–49, https://doi.org/10.1007/978-3-642-22067-8_2, 2012.
Repo, T., Korhonen, A., Laukkanen, M., Lehto, T., and Silvennoinen, R.: Detecting mycorrhizal colonisation in Scots pine roots using electrical impedance spectra, Biosyst. Eng., 121, 139–149, https://doi.org/10.1016/j.biosystemseng.2014.02.014, 2014.
Revil, A. and Florsch, N.: Determination of permeability from spectral induced polarization in granular media, Geophys. J. Int., 181, 1480–1498, https://doi.org/10.1111/j.1365-246X.2010.04573.x, 2010.
Revil, A., Karaoulis, M., Johnson, T., and Kemna, A.: Review: Some low-frequency electrical methods for subsurface characterization and monitoring in hydrogeology, Hydrogeol. J., 20, 617–658, https://doi.org/10.1007/s10040-011-0819-x, 2012.
Revil, A., Florsch, N., and Camerlynck, C.: Spectral induced polarization porosimetry, Geophys. J. Int., 198, 1016–1033, https://doi.org/10.1093/gji/ggu180, 2014.
Rossi, R., Amato, M., Bitella, G., Bochicchio, R., Ferreira Gomes, J., Lovelli, S., Martorella, E., and Favale, P.: Electrical resistivity tomography as a non-destructive method for mapping root biomass in an orchard, Eur. J. Soil Sci., 62, 206–215, https://doi.org/10.1111/j.1365-2389.2010.01329.x, 2011.
Schraut, D., Heilmeier, H., and Hartung, W.: Radial transport of water and abscisic acid (ABA) in roots of Zea mays under conditions of nutrient deficiency, J. Exp. Bot., 56, 879–886, https://doi.org/10.1093/jxb/eri080, 2005.
Schwan, H.: Electrical Properties of Tissue and Cell Suspensions, Vol. 5 of Advances in Biological and Medical Physics, Elsevier, 147–209, https://doi.org/10.1016/B978-1-4832-3111-2.50008-0, 1957.
Schwarz, G.: A theory of the low-frequency dielectric dispersion of colloidal particles in electrolyte solution, J. Phys. Chem., 66, 2636–2642, https://doi.org/10.1021/j100818a067, 1962.
Singha, K., Day-Lewis, F., Johnson, T., and Slater, L.: Advances in interpretation of subsurface processes with time-lapse electrical imaging, Hydrol. Process., 29, 1549–1576, https://doi.org/10.1002/hyp.10280, 2014.
Srayeddin, I. and Doussan, C.: Estimation of the spatial variability of root water uptake of maize and sorghum at the field scale by electrical resistivity tomography, Plant Soil, 319, 185–207, https://doi.org/10.1007/s11104-008-9860-5, 2009.
Tarasov, A. and Titov, K.: On the use of the Cole-Cole equations in spectral induced polarization, Geophys. J. Int., 195, 352–356, https://doi.org/10.1093/gji/ggt251, 2013.
Tinker, P. and Nye, P.: Solute movement in the rhizosphere, Oxford University Press, Inc., New York, https://doi.org/10.1046/j.1365-2389.2001.00418-2.x, 2000.
Titov, K., Komarov, V., Tarasov, V., and Levitski, A.: Theoretical and experimental study of time domain-induced polarization in water-saturated sands, J. Appl. Geophys., 50, 417–433, https://doi.org/10.1016/S0926-9851(02)00168-4, 2002.
Uhlmann, D. and Hakim, R.: Derivation of distribution functions from relaxation data, J. Phys. Chem. Solids, 32, 2652–2655, https://doi.org/10.1016/S0022-3697(71)80114-2, 1971.
Urban, J., Bequet, R., and Mainiero, R.: Assessing the applicability of the earth impedance method for in situ studies of tree root systems, J. Exp. Bot., 62, 1857–1869, https://doi.org/10.1093/jxb/erq370, 2011.
Walker, J.: Electrical AC resistance and capacitance of Zea mays L, Plant Soil, 23, 270–274, https://doi.org/10.1007/BF01358354, 1965.
Wang, P., Zhou, D.-M., Li, L.-Z., and Li, D.-D.: What role does cell membrane surface potential play in ion-plant interactions, Plant Signaling & Behavior, 4, 42–43, https://doi.org/10.4161/psb.4.1.7270, 2009.
Wang, P., Kinraide, T., Zhou, D., K., P. M., and Peijnenburg, W.: Plasma membrane surface potential: dual effects upon ion uptake and toxicity, Plant Physiol., 155, 808–820, https://doi.org/10.1104/pp.110.165985, 2011.
Wang, Y.-M., Kinraide, T., Wang, P., Zhou, D., and Hao, X.: Modeling rhizotoxicity and uptake of Zn and Co singly and in binary mixture in wheat in terms of the cell membrane surface electrical potential, Environ. Sci. Technol., 47, 2831–2838, https://doi.org/10.1021/es3022107, 2013.
Weigand, M. and Kemna, A.: Debye decomposition of time-lapse spectral induced polarisation data, Comput. Geosci., 86, 34–45, https://doi.org/10.1016/j.cageo.2015.09.021, 2016.
Weigand, M. and Kemna, A.: Data and results for manuscript “Multi-frequency electrical impedance tomography as a non-invasive tool to characterize and monitor crop root systems”, Data set, Zenodo, https://doi.org/10.5281/zenodo.260087, 2017.
Whalley, W., Binley, A., Watts, C., Shanahan, P., Dodd, I., Ober, E., Ashton, R., Webster, C., White, R., and Hawkesford, M. J.: Methods to estimate changes in soil water for phenotyping root activity in the field, Plant Soil, 1–16, https://doi.org/10.1007/s11104-016-3161-1, 2017.
Willatt, S., Struss, R., and Taylor, H.: In situ root studies using neutron radiography, Agron. J., 70, 581–586, https://doi.org/10.2134/agronj1978.00021962007000040016x, 1978.
Zanetti, C., Weller, A., Vennetier, M., and Mériaux, P.: Detection of buried tree root samples by using geoelectrical measurements: a laboratory experiment, Plant Soil, 339, 273–283, https://doi.org/10.1007/s11104-010-0574-0, 2011.
Zhao, Y., Zimmermann, E., Huisman, J., Treichel, A., Wolters, B., van Waasen, S., and Kemna, A.: Broadband EIT borehole measurements with high phase accuracy using numerical corrections of electromagnetic coupling effects, Meas. Sci. Technol., 24, 085005, https://doi.org/10.1088/0957-0233/24/8/085005, 2013.
Zimmermann, E., Kemna, A., Berwix, J., Glaas, W., and Vereecken, H.: EIT measurement system with high phase accuracy for the imaging of spectral induced polarization properties of soils and sediments, Meas. Sci. Technol., 19, 094010, https://doi.org/10.1088/0957-0233/19/9/094010, 2008.
Short summary
Root systems are essential in nutrient uptake and translocation, but are difficult to characterize non-invasively with existing methods. We propose electrical impedance tomography (EIT) as a new tool for the imaging and monitoring of crop root systems. In a laboratory experiment we demonstrate the capability of the method to capture physiological responses of root systems with high spatial and temporal resolution. We conclude that EIT is a promising functional imaging technique for crop roots.
Root systems are essential in nutrient uptake and translocation, but are difficult to...
Altmetrics
Final-revised paper
Preprint