Articles | Volume 19, issue 15
https://doi.org/10.5194/bg-19-3699-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-3699-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 Aug 2022
Research article |
| 09 Aug 2022
| 09 Aug 2022
The effect of static chamber base on N2O flux in drip irrigation
Institute of Soil, Water and Environmental Sciences, Agricultural
Research Organization (ARO), Volcani Institute, 68 HaMacabim Rd. P.O Box
15159, Rishon Lezion 7505101, Israel
Asher Bar-Tal
Institute of Soil, Water and Environmental Sciences, Agricultural
Research Organization (ARO), Volcani Institute, 68 HaMacabim Rd. P.O Box
15159, Rishon Lezion 7505101, Israel
Alon Gal
Institute of Soil, Water and Environmental Sciences, Agricultural
Research Organization (ARO), Volcani Institute, 68 HaMacabim Rd. P.O Box
15159, Rishon Lezion 7505101, Israel
The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan
University, Ramat Gan, Ramat-Gan 52900, Israel
Shmulik P. Friedman
Institute of Soil, Water and Environmental Sciences, Agricultural
Research Organization (ARO), Volcani Institute, 68 HaMacabim Rd. P.O Box
15159, Rishon Lezion 7505101, Israel
David Russo
Institute of Soil, Water and Environmental Sciences, Agricultural
Research Organization (ARO), Volcani Institute, 68 HaMacabim Rd. P.O Box
15159, Rishon Lezion 7505101, Israel
Related authors
Shahar Baram, Asher Bar-Tal, Anna Beriozkin, Roee Katzir, Alon Gal, and David Russo
EGUsphere, https://doi.org/10.5194/egusphere-2024-2140, https://doi.org/10.5194/egusphere-2024-2140, 2024
Short summary
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We evaluate the impact of scoria-filled aeration trenches on N2O and CO2 emissions from a treated wastewater (TWW) irrigated orchard, using three years of field monitoring and 3-D numerical simulations. We show that trenches may increase the N2O fluxes year-round, and that filling them with hydraulically optimal soil may increase water uptake but concomitantly increase the N2O fluxes. Improved growth by the trees may balance the increased N2O emissions from the trenches.
Shahar Baram, Asher Bar-Tal, Anna Beriozkin, Roee Katzir, Alon Gal, and David Russo
EGUsphere, https://doi.org/10.5194/egusphere-2024-2140, https://doi.org/10.5194/egusphere-2024-2140, 2024
Short summary
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We evaluate the impact of scoria-filled aeration trenches on N2O and CO2 emissions from a treated wastewater (TWW) irrigated orchard, using three years of field monitoring and 3-D numerical simulations. We show that trenches may increase the N2O fluxes year-round, and that filling them with hydraulically optimal soil may increase water uptake but concomitantly increase the N2O fluxes. Improved growth by the trees may balance the increased N2O emissions from the trenches.
Related subject area
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Eddy-covariance fluxes of CO2, CH4 and N2O in a drained peatland forest after clear-cutting
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Interferences caused by the biogeochemical methane cycle in peats during the assessment of abandoned oil wells
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Seasonal and interannual variability in CO2 fluxes in southern Africa seen by GOSAT
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Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh
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CO2 emissions of drained coastal peatlands in the Netherlands and potential emission reduction by water infiltration systems
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Biogeosciences, 22, 1781–1807, https://doi.org/10.5194/bg-22-1781-2025, https://doi.org/10.5194/bg-22-1781-2025, 2025
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Climate change has the potential to influence the carbon sequestration potential of terrestrial ecosystems, and here the nitrogen cycle is also important. We used the terrestrial biosphere model QUINCY (QUantifying Interactions between terrestrial Nutrient CYcles and the climate system) in a mixed deciduous forest in Canada. We investigated the usefulness of using the leaf area index and leaf chlorophyll content to improve the parameterization of the model. This work paves the way for using spaceborne observations in model parameterizations, also including information on the nitrogen cycle.
Patrick Aurich, Uwe Spank, and Matthias Koschorreck
Biogeosciences, 22, 1697–1709, https://doi.org/10.5194/bg-22-1697-2025, https://doi.org/10.5194/bg-22-1697-2025, 2025
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Lakes can be sources and sinks of the greenhouse gas carbon dioxide. The gas exchange between the atmosphere and the water can be measured by taking gas samples from them. However, the depth of water samples is not well defined, which may cause errors. We hypothesized that gradients of CO2 concentrations develop under the surface when wind speeds are very low. Our measurements show that such a gradient can occur on calm nights, potentially shifting lakes from a CO2 sink to a source.
Roxanne Daelman, Marijn Bauters, Matti Barthel, Emmanuel Bulonza, Lodewijk Lefevre, José Mbifo, Johan Six, Klaus Butterbach-Bahl, Benjamin Wolf, Ralf Kiese, and Pascal Boeckx
Biogeosciences, 22, 1529–1542, https://doi.org/10.5194/bg-22-1529-2025, https://doi.org/10.5194/bg-22-1529-2025, 2025
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The increase in atmospheric concentrations of several greenhouse gases (GHGs) since 1750 is attributed to human activity. However, natural ecosystems, such as tropical forests, also contribute to GHG budgets. The Congo Basin hosts the second largest tropical forest and is understudied. In this study, measurements of soil GHG exchange were carried out during 16 months in a tropical forest in the Congo Basin. Overall, the soil acted as a major source of CO2 and N2O and a minor sink of CH4.
Olli-Pekka Tikkasalo, Olli Peltola, Pavel Alekseychik, Juha Heikkinen, Samuli Launiainen, Aleksi Lehtonen, Qian Li, Eduardo Martínez-García, Mikko Peltoniemi, Petri Salovaara, Ville Tuominen, and Raisa Mäkipää
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The emissions of greenhouse gases (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) were measured from a clear-cut peatland forest site. The measurements covered the whole year of 2022, which was the second growing season after the clear-cut. The site was a strong GHG source, and the highest emissions came from CO2, followed by N2O and CH4. A statistical model that included information on different surfaces at the site was developed to unravel surface-type-specific GHG fluxes.
Ruth Reef, Edoardo Daly, Tivanka Anandappa, Eboni-Jane Vienna-Hallam, Harriet Robertson, Matthew Peck, and Adrien Guyot
Biogeosciences, 22, 1149–1162, https://doi.org/10.5194/bg-22-1149-2025, https://doi.org/10.5194/bg-22-1149-2025, 2025
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Sebastian F. A. Jordan, Stefan Schloemer, Martin Krüger, Tanja Heffner, Marcus A. Horn, and Martin Blumenberg
Biogeosciences, 22, 809–830, https://doi.org/10.5194/bg-22-809-2025, https://doi.org/10.5194/bg-22-809-2025, 2025
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Laura Thölix, Leif Backman, Minttu Havu, Esko Karvinen, Jesse Soininen, Justine Trémeau, Olli Nevalainen, Joyson Ahongshangbam, Leena Järvi, and Liisa Kulmala
Biogeosciences, 22, 725–749, https://doi.org/10.5194/bg-22-725-2025, https://doi.org/10.5194/bg-22-725-2025, 2025
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Gabrielle E. Kleber, Leonard Magerl, Alexandra V. Turchyn, Stefan Schloemer, Mark Trimmer, Yizhu Zhu, and Andrew Hodson
Biogeosciences, 22, 659–674, https://doi.org/10.5194/bg-22-659-2025, https://doi.org/10.5194/bg-22-659-2025, 2025
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Our research on Svalbard shows that glacier melt rivers can transport large amounts of methane, a potent greenhouse gas. By studying a glacier over one summer, we found that its river was highly concentrated in methane, suggesting that rivers could provide a significant source of methane emissions as the Arctic warms and glaciers melt. This is the first time such emissions have been measured on Svalbard, indicating a wider environmental concern as such processes are occurring across the Arctic.
Eva-Marie Metz, Sanam Noreen Vardag, Sourish Basu, Martin Jung, and André Butz
Biogeosciences, 22, 555–584, https://doi.org/10.5194/bg-22-555-2025, https://doi.org/10.5194/bg-22-555-2025, 2025
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We estimate CO2 fluxes in semiarid southern Africa from 2009 to 2018 based on satellite CO2 measurements and atmospheric inverse modeling. By selecting process-based vegetation models, which agree with the satellite CO2 fluxes, we find that soil respiration mainly drives the seasonality, whereas photosynthesis substantially influences the interannual variability. Our study emphasizes the need for better representation of the response of semiarid ecosystems to soil rewetting in vegetation models.
Tuula Aalto, Aki Tsuruta, Jarmo Mäkelä, Jurek Müller, Maria Tenkanen, Eleanor Burke, Sarah Chadburn, Yao Gao, Vilma Mannisenaho, Thomas Kleinen, Hanna Lee, Antti Leppänen, Tiina Markkanen, Stefano Materia, Paul A. Miller, Daniele Peano, Olli Peltola, Benjamin Poulter, Maarit Raivonen, Marielle Saunois, David Wårlind, and Sönke Zaehle
Biogeosciences, 22, 323–340, https://doi.org/10.5194/bg-22-323-2025, https://doi.org/10.5194/bg-22-323-2025, 2025
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Wetland methane responses to temperature and precipitation were studied in a boreal wetland-rich region in northern Europe using ecosystem models, atmospheric inversions, and upscaled flux observations. The ecosystem models differed in their responses to temperature and precipitation and in their seasonality. However, multi-model means, inversions, and upscaled fluxes had similar seasonality, and they suggested co-limitation by temperature and precipitation.
Zhen Zhang, Benjamin Poulter, Joe R. Melton, William J. Riley, George H. Allen, David J. Beerling, Philippe Bousquet, Josep G. Canadell, Etienne Fluet-Chouinard, Philippe Ciais, Nicola Gedney, Peter O. Hopcroft, Akihiko Ito, Robert B. Jackson, Atul K. Jain, Katherine Jensen, Fortunat Joos, Thomas Kleinen, Sara H. Knox, Tingting Li, Xin Li, Xiangyu Liu, Kyle McDonald, Gavin McNicol, Paul A. Miller, Jurek Müller, Prabir K. Patra, Changhui Peng, Shushi Peng, Zhangcai Qin, Ryan M. Riggs, Marielle Saunois, Qing Sun, Hanqin Tian, Xiaoming Xu, Yuanzhi Yao, Yi Xi, Wenxin Zhang, Qing Zhu, Qiuan Zhu, and Qianlai Zhuang
Biogeosciences, 22, 305–321, https://doi.org/10.5194/bg-22-305-2025, https://doi.org/10.5194/bg-22-305-2025, 2025
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This study assesses global methane emissions from wetlands between 2000 and 2020 using multiple models. We found that wetland emissions increased by 6–7 Tg CH4 yr-1 in the 2010s compared to the 2000s. Rising temperatures primarily drove this increase, while changes in precipitation and CO2 levels also played roles. Our findings highlight the importance of wetlands in the global methane budget and the need for continuous monitoring to understand their impact on climate change.
Lorena Carrasco-Barea, Dolors Verdaguer, Maria Gispert, Xavier D. Quintana, Hélène Bourhis, and Laura Llorens
Biogeosciences, 22, 289–304, https://doi.org/10.5194/bg-22-289-2025, https://doi.org/10.5194/bg-22-289-2025, 2025
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Carbon dioxide fluxes have been measured seasonally in four plant species in a Mediterranean non-tidal salt marsh, highlighting the high carbon removal potential that these species have. Carbon dioxide and methane emissions from soil showed high variability among the habitats studied, and they were generally higher than those observed in tidal salt marshes. Our results are important for making more accurate predictions regarding carbon emissions from these ecosystems.
Ekaterina Ezhova, Topi Laanti, Anna Lintunen, Pasi Kolari, Tuomo Nieminen, Ivan Mammarella, Keijo Heljanko, and Markku Kulmala
Biogeosciences, 22, 257–288, https://doi.org/10.5194/bg-22-257-2025, https://doi.org/10.5194/bg-22-257-2025, 2025
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Machine learning (ML) models are gaining popularity in biogeosciences. They are applied as gap-filling methods and used to upscale carbon fluxes to larger areas. Here we use explainable artificial intelligence (XAI) methods to elucidate the performance of machine learning models for carbon dioxide fluxes in boreal forests. We show that statistically equal models treat input variables differently. XAI methods can help scientists make informed decisions when applying ML models in their research.
Jessica Breavington, Alexandra Steckbauer, Chuancheng Fu, Mongi Ennasri, and Carlos M. Duarte
Biogeosciences, 22, 117–134, https://doi.org/10.5194/bg-22-117-2025, https://doi.org/10.5194/bg-22-117-2025, 2025
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Mangrove carbon storage in the Red Sea is lower than average due to challenging growth conditions. We collected mangrove soil cores over multiple seasons to measure greenhouse gas (GHG) flux of carbon dioxide and methane. GHG emissions are a small offset to mangrove carbon storage overall but punctuated by periods of high emission. This variation is linked to environmental and soil properties, which were also measured. The findings aid understanding of GHG dynamics in arid mangrove ecosystems.
Johnathan Daniel Maxey, Neil D. Hartstein, Hermann W. Bange, and Moritz Müller
Biogeosciences, 21, 5613–5637, https://doi.org/10.5194/bg-21-5613-2024, https://doi.org/10.5194/bg-21-5613-2024, 2024
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The distribution of N2O in fjord-like estuaries is poorly described in the Southern Hemisphere. Our study describes N2O distribution and its drivers in one such system in Macquarie Harbour, Tasmania. Water samples were collected seasonally in 2022 and 2023. Results show the system removes atmospheric N2O when river flow is high, whereas the system emits N2O when the river flow is low. N2O generated in basins is intercepted by the surface water and exported to the ocean during high river flow.
Wael Al Hamwi, Maren Dubbert, Jörg Schaller, Matthias Lück, Marten Schmidt, and Mathias Hoffmann
Biogeosciences, 21, 5639–5651, https://doi.org/10.5194/bg-21-5639-2024, https://doi.org/10.5194/bg-21-5639-2024, 2024
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We present a fully automatic, low-cost soil–plant enclosure system to monitor CO2 and evapotranspiration fluxes within greenhouse experiments. It operates in two modes: independent, using low-cost sensors, and dependent, where multiple chambers connect to a single gas analyzer via a low-cost multiplexer. This system provides precise, accurate measurements and high temporal resolution, enabling comprehensive monitoring of plant–soil responses to various treatments and conditions.
Zhao-Jun Yong, Wei-Jen Lin, Chiao-Wen Lin, and Hsing-Juh Lin
Biogeosciences, 21, 5247–5260, https://doi.org/10.5194/bg-21-5247-2024, https://doi.org/10.5194/bg-21-5247-2024, 2024
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We measured CO2 and CH4 fluxes from mangrove stems and soils of Avicennia marina and Kandelia obovata during tidal cycles. Both stem types served as CO2 and CH4 sources, emitting less CH4 than soils, with no difference in CO2 flux. While A. marina stems showed increased CO2 fluxes from low to high tides, they acted as a CH4 sink before flooding and as a source after ebbing. However, K. obovata stems showed no flux pattern. This study highlights the need to consider tidal influence and species.
Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
Biogeosciences, 21, 5117–5129, https://doi.org/10.5194/bg-21-5117-2024, https://doi.org/10.5194/bg-21-5117-2024, 2024
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the eddy covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate-change-induced droughts.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
Biogeosciences, 21, 4837–4851, https://doi.org/10.5194/bg-21-4837-2024, https://doi.org/10.5194/bg-21-4837-2024, 2024
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Nitrous oxide (N2O) is a potent greenhouse and ozone-depleting gas produced largely from microbial nitrogen cycling processes, and human activities have resulted in increases in atmospheric N2O. We investigate the role of physical and chemical disturbances to soils and sediments in N2O production. We demonstrate that physicochemical perturbation increases N2O production, microbial community adapts over time, and initial perturbation appears to confer resilience to subsequent disturbance.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
Biogeosciences, 21, 4723–4737, https://doi.org/10.5194/bg-21-4723-2024, https://doi.org/10.5194/bg-21-4723-2024, 2024
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Permafrost peatlands are thawing due to climate change, releasing large quantities of carbon that degrades upon thawing and is released as CO2, CH4 or dissolved organic carbon (DOC). We incubated thawed Norwegian permafrost peat plateaus and thermokarst pond sediment found next to permafrost for up to 350 d to measure carbon loss. CO2 production was initially the highest, whereas CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Silvie Lainela, Erik Jacobs, Stella-Theresa Luik, Gregor Rehder, and Urmas Lips
Biogeosciences, 21, 4495–4519, https://doi.org/10.5194/bg-21-4495-2024, https://doi.org/10.5194/bg-21-4495-2024, 2024
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the offshore areas of the Baltic Sea. Despite this high variability, caused mostly by coastal physical processes, the average annual air–sea CO2 fluxes differed only marginally between the sub-basins.
Maren Jenrich, Juliane Wolter, Susanne Liebner, Christian Knoblauch, Guido Grosse, Fiona Giebeler, Dustin Whalen, and Jens Strauss
EGUsphere, https://doi.org/10.5194/egusphere-2024-2891, https://doi.org/10.5194/egusphere-2024-2891, 2024
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Climate warming in the Arctic is causing the erosion of permafrost coasts and the transformation of permafrost lakes into lagoons. To understand how this affects greenhouse gas (GHG) emissions, we studied carbon dioxide (CO₂) and methane (CH₄) production in lagoons with varying sea connections. Younger lagoons produce more CH₄, while CO₂ increases in more marine conditions. Flooding of permafrost lowlands due to rising sea levels may lead to higher GHG emissions from Arctic coasts in the future.
Martti Honkanen, Mika Aurela, Juha Hatakka, Lumi Haraguchi, Sami Kielosto, Timo Mäkelä, Jukka Seppälä, Simo-Matti Siiriä, Ken Stenbäck, Juha-Pekka Tuovinen, Pasi Ylöstalo, and Lauri Laakso
Biogeosciences, 21, 4341–4359, https://doi.org/10.5194/bg-21-4341-2024, https://doi.org/10.5194/bg-21-4341-2024, 2024
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The exchange of CO2 between the sea and the atmosphere was studied in the Archipelago Sea, Baltic Sea, in 2017–2021, using an eddy covariance technique. The sea acted as a net source of CO2 with an average yearly emission of 27.1 gC m-2 yr-1, indicating that the marine ecosystem respired carbon that originated elsewhere. The yearly CO2 emission varied between 18.2–39.2 gC m-2 yr-1, mostly due to the yearly variation of ecosystem carbon uptake.
Ralf C. H. Aben, Daniël van de Craats, Jim Boonman, Stijn H. Peeters, Bart Vriend, Coline C. F. Boonman, Ype van der Velde, Gilles Erkens, and Merit van den Berg
Biogeosciences, 21, 4099–4118, https://doi.org/10.5194/bg-21-4099-2024, https://doi.org/10.5194/bg-21-4099-2024, 2024
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Drained peatlands cause high CO2 emissions. We assessed the effectiveness of subsurface water infiltration systems (WISs) in reducing CO2 emissions related to increases in water table depth (WTD) on 12 sites for up to 4 years. Results show WISs markedly reduced emissions by 2.1 t CO2-C ha-1 yr-1. The relationship between the amount of carbon above the WTD and CO2 emission was stronger than the relationship between WTD and emission. Long-term monitoring is crucial for accurate emission estimates.
Stavros Stagakis, Dominik Brunner, Junwei Li, Leif Backman, Anni Karvonen, Lionel Constantin, Leena Järvi, Minttu Havu, Jia Chen, Sophie Emberger, and Liisa Kulmala
EGUsphere, https://doi.org/10.5194/egusphere-2024-2475, https://doi.org/10.5194/egusphere-2024-2475, 2024
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The balance between CO2 uptake and emissions from urban green areas is still not well understood. This study evaluated for the first time the urban park CO2 exchange simulations by four different types of biosphere models by comparing them with observations. Even though some advantages and disadvantages of the different model types were identified, there was no strong evidence that more complex models performed better than simple ones.
Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
Biogeosciences, 21, 3819–3838, https://doi.org/10.5194/bg-21-3819-2024, https://doi.org/10.5194/bg-21-3819-2024, 2024
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Methane (CH4) is an important greenhouse gas and contributes to climate warming. However, the input of CH4 from coastal areas to the atmosphere is not well defined. Dissolved and atmospheric CH4 was determined at high spatial resolution in or above the North Sea. The atmospheric CH4 concentration was mainly influenced by wind direction. With our detailed study on the spatial distribution of CH4 fluxes we were able to provide a detailed and more realistic estimation of coastal CH4 fluxes.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, https://doi.org/10.5194/bg-21-3509-2024, 2024
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Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, https://doi.org/10.5194/bg-21-3215-2024, 2024
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Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, https://doi.org/10.5194/bg-21-3183-2024, 2024
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Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
Chaolei Yang, Yufeng Tian, Jingqi Cui, Guangxiong He, Jingyuan Li, Canfeng Li, Haichuang Duan, Zong Wei, Liu Yan, Xin Xia, Yong Huang, and Aihua Jiang
EGUsphere, https://doi.org/10.5194/egusphere-2024-1226, https://doi.org/10.5194/egusphere-2024-1226, 2024
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The environmental factors and CO2 flux of the grassland ecosystem in the dry-hot valley of the Jinsha River exhibited highly seasonal characteristics. During the rainy season, the grassland showed a carbon sink feature, while during the dry season, it exhibited carbon emission status. Throughout the entire year, the grassland ecosystem acted as a weak carbon source, exhibiting a carbon-neutral. The CO2 flux was most influenced by vapor pressure deficit, relative humidity, and soil water content.
Yélognissè Agbohessou, Claire Delon, Manuela Grippa, Eric Mougin, Daouda Ngom, Espoir Koudjo Gaglo, Ousmane Ndiaye, Paulo Salgado, and Olivier Roupsard
Biogeosciences, 21, 2811–2837, https://doi.org/10.5194/bg-21-2811-2024, https://doi.org/10.5194/bg-21-2811-2024, 2024
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Emissions of greenhouse gases in the Sahel are not well represented because they are considered weak compared to the rest of the world. However, natural areas in the Sahel emit carbon dioxide and nitrous oxides, which need to be assessed because of extended surfaces. We propose an assessment of such emissions in Sahelian silvopastoral systems and of how they are influenced by environmental characteristics. These results are essential to inform climate change strategies in the region.
Merit van den Berg, Thomas M. Gremmen, Renske J. E. Vroom, Jacobus van Huissteden, Jim Boonman, Corine J. A. van Huissteden, Ype van der Velde, Alfons J. P. Smolders, and Bas P. van de Riet
Biogeosciences, 21, 2669–2690, https://doi.org/10.5194/bg-21-2669-2024, https://doi.org/10.5194/bg-21-2669-2024, 2024
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Drained peatlands emit 3 % of the global greenhouse gas emissions. Paludiculture is a way to reduce CO2 emissions while at the same time generating an income for landowners. The side effect is the potentially high methane emissions. We found very high methane emissions for broadleaf cattail compared with narrowleaf cattail and water fern. The rewetting was, however, effective to stop CO2 emissions for all species. The highest potential to reduce greenhouse gas emissions had narrowleaf cattail.
Antonio Donateo, Daniela Famulari, Donato Giovannelli, Arturo Mariani, Mauro Mazzola, Stefano Decesari, and Gianluca Pappaccogli
EGUsphere, https://doi.org/10.5194/egusphere-2024-1440, https://doi.org/10.5194/egusphere-2024-1440, 2024
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This study focuses on direct measurements of CO2 and CH4 turbulent eddy covariance fluxes in tundra ecosystems in the Svalbard Islands over a two-year period. Our results reveal dynamic interactions between climatic conditions and ecosystem activities such as photosynthesis and microbial activity. The observed net summertime methane uptake is correlated with the activation and aeration of soil microorganisms. High temperature anomalies increase CO2 and CH4 emissions.
Thea H. Heimdal, Galen A. McKinley, Adrienne J. Sutton, Amanda R. Fay, and Lucas Gloege
Biogeosciences, 21, 2159–2176, https://doi.org/10.5194/bg-21-2159-2024, https://doi.org/10.5194/bg-21-2159-2024, 2024
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Measurements of ocean carbon are limited in time and space. Machine learning algorithms are therefore used to reconstruct ocean carbon where observations do not exist. Improving these reconstructions is important in order to accurately estimate how much carbon the ocean absorbs from the atmosphere. In this study, we find that a small addition of observations from the Southern Ocean, obtained by autonomous sampling platforms, could significantly improve the reconstructions.
Guilherme L. Torres Mendonça, Julia Pongratz, and Christian H. Reick
Biogeosciences, 21, 1923–1960, https://doi.org/10.5194/bg-21-1923-2024, https://doi.org/10.5194/bg-21-1923-2024, 2024
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We study the timescale dependence of airborne fraction and underlying feedbacks by a theory of the climate–carbon system. Using simulations we show the predictive power of this theory and find that (1) this fraction generally decreases for increasing timescales and (2) at all timescales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
François Clayer, Jan Erik Thrane, Kuria Ndungu, Andrew King, Peter Dörsch, and Thomas Rohrlack
Biogeosciences, 21, 1903–1921, https://doi.org/10.5194/bg-21-1903-2024, https://doi.org/10.5194/bg-21-1903-2024, 2024
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Determination of dissolved greenhouse gas (GHG) in freshwater allows us to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts and interferences with water chemistry in freshwater. Here, we tested the effects of HgCl2, two substitutes and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences for GHG flux estimation.
Helena Rautakoski, Mika Korkiakoski, Jarmo Mäkelä, Markku Koskinen, Kari Minkkinen, Mika Aurela, Paavo Ojanen, and Annalea Lohila
Biogeosciences, 21, 1867–1886, https://doi.org/10.5194/bg-21-1867-2024, https://doi.org/10.5194/bg-21-1867-2024, 2024
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Current and future nitrous oxide (N2O) emissions are difficult to estimate due to their high variability in space and time. Several years of N2O fluxes from drained boreal peatland forest indicate high importance of summer precipitation, winter temperature, and snow conditions in controlling annual N2O emissions. The results indicate increasing year-to-year variation in N2O emissions in changing climate with more extreme seasonal weather conditions.
Matthias Koschorreck, Norbert Kamjunke, Uta Koedel, Michael Rode, Claudia Schuetze, and Ingeborg Bussmann
Biogeosciences, 21, 1613–1628, https://doi.org/10.5194/bg-21-1613-2024, https://doi.org/10.5194/bg-21-1613-2024, 2024
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We measured the emission of carbon dioxide (CO2) and methane (CH4) from different sites at the river Elbe in Germany over 3 days to find out what is more important for quantification: small-scale spatial variability or diurnal temporal variability. We found that CO2 emissions were very different between day and night, while CH4 emissions were more different between sites. Dried out river sediments contributed to CO2 emissions, while the side areas of the river were important CH4 sources.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences, 21, 1563–1581, https://doi.org/10.5194/bg-21-1563-2024, https://doi.org/10.5194/bg-21-1563-2024, 2024
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We performed a full assessment of the carbon and nitrogen cycles of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes were deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation in Greece. The inventory also reports changes in soil organic carbon and nitrogen stocks in arable soils.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences, 21, 1301–1321, https://doi.org/10.5194/bg-21-1301-2024, https://doi.org/10.5194/bg-21-1301-2024, 2024
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to unmix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
Justine Trémeau, Beñat Olascoaga, Leif Backman, Esko Karvinen, Henriikka Vekuri, and Liisa Kulmala
Biogeosciences, 21, 949–972, https://doi.org/10.5194/bg-21-949-2024, https://doi.org/10.5194/bg-21-949-2024, 2024
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We studied urban lawns and meadows in the Helsinki metropolitan area, Finland. We found that meadows are more resistant to drought events but that they do not increase carbon sequestration compared with lawns. Moreover, the transformation from lawns to meadows did not demonstrate any negative climate effects in terms of greenhouse gas emissions. Even though social and economic aspects also steer urban development, these results can guide planning to consider carbon-smart options.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
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We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences, 20, 5029–5067, https://doi.org/10.5194/bg-20-5029-2023, https://doi.org/10.5194/bg-20-5029-2023, 2023
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHGs) CO2, CH4, or N2O. Various physicochemical and biological processes control the fluxes of these GHGs between ecosystems and the atmosphere. Therefore, fluxes depend on environmental conditions such as soil moisture, soil temperature, or soil parameters, which result in large spatial and temporal variations of GHG fluxes. Here, we describe an example of how this variation may be studied and analyzed.
Laurie C. Menviel, Paul Spence, Andrew E. Kiss, Matthew A. Chamberlain, Hakase Hayashida, Matthew H. England, and Darryn Waugh
Biogeosciences, 20, 4413–4431, https://doi.org/10.5194/bg-20-4413-2023, https://doi.org/10.5194/bg-20-4413-2023, 2023
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As the ocean absorbs 25% of the anthropogenic emissions of carbon, it is important to understand the impact of climate change on the flux of carbon between the ocean and the atmosphere. Here, we use a very high-resolution ocean, sea-ice, carbon cycle model to show that the capability of the Southern Ocean to uptake CO2 has decreased over the last 40 years due to a strengthening and poleward shift of the southern hemispheric westerlies. This trend is expected to continue over the coming century.
Petr Znachor, Jiří Nedoma, Vojtech Kolar, and Anna Matoušů
Biogeosciences, 20, 4273–4288, https://doi.org/10.5194/bg-20-4273-2023, https://doi.org/10.5194/bg-20-4273-2023, 2023
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We conducted intensive spatial sampling of the hypertrophic fishpond to better understand the spatial dynamics of methane fluxes and environmental heterogeneity in fishponds. The diffusive fluxes of methane accounted for only a minor fraction of the total fluxes and both varied pronouncedly within the pond and over the studied summer season. This could be explained only by the water depth. Wind substantially affected temperature, oxygen and chlorophyll a distribution in the pond.
Sofie Sjögersten, Martha Ledger, Matthias Siewert, Betsabé de la Barreda-Bautista, Andrew Sowter, David Gee, Giles Foody, and Doreen S. Boyd
Biogeosciences, 20, 4221–4239, https://doi.org/10.5194/bg-20-4221-2023, https://doi.org/10.5194/bg-20-4221-2023, 2023
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Permafrost thaw in Arctic regions is increasing methane emissions, but quantification is difficult given the large and remote areas impacted. We show that UAV data together with satellite data can be used to extrapolate emissions across the wider landscape as well as detect areas at risk of higher emissions. A transition of currently degrading areas to fen type vegetation can increase emission by several orders of magnitude, highlighting the importance of quantifying areas at risk.
Cole G. Brachmann, Tage Vowles, Riikka Rinnan, Mats P. Björkman, Anna Ekberg, and Robert G. Björk
Biogeosciences, 20, 4069–4086, https://doi.org/10.5194/bg-20-4069-2023, https://doi.org/10.5194/bg-20-4069-2023, 2023
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Herbivores change plant communities through grazing, altering the amount of CO2 and plant-specific chemicals (termed VOCs) emitted. We tested this effect by excluding herbivores and studying the CO2 and VOC emissions. Herbivores reduced CO2 emissions from a meadow community and altered VOC composition; however, community type had the strongest effect on the amount of CO2 and VOCs released. Herbivores can mediate greenhouse gas emissions, but the effect is marginal and community dependent.
Ole Lessmann, Jorge Encinas Fernández, Karla Martínez-Cruz, and Frank Peeters
Biogeosciences, 20, 4057–4068, https://doi.org/10.5194/bg-20-4057-2023, https://doi.org/10.5194/bg-20-4057-2023, 2023
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Based on a large dataset of seasonally resolved methane (CH4) pore water concentrations in a reservoir's sediment, we assess the significance of CH4 emissions due to reservoir flushing. In the studied reservoir, CH4 emissions caused by one flushing operation can represent 7 %–14 % of the annual CH4 emissions and depend on the timing of the flushing operation. In reservoirs with high sediment loadings, regular flushing may substantially contribute to the overall CH4 emissions.
Matti Räsänen, Risto Vesala, Petri Rönnholm, Laura Arppe, Petra Manninen, Markus Jylhä, Jouko Rikkinen, Petri Pellikka, and Janne Rinne
Biogeosciences, 20, 4029–4042, https://doi.org/10.5194/bg-20-4029-2023, https://doi.org/10.5194/bg-20-4029-2023, 2023
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Fungus-growing termites recycle large parts of dead plant material in African savannas and are significant sources of greenhouse gases. We measured CO2 and CH4 fluxes from their mounds and surrounding soils in open and closed habitats. The fluxes scale with mound volume. The results show that emissions from mounds of fungus-growing termites are more stable than those from other termites. The soil fluxes around the mound are affected by the termite colonies at up to 2 m distance from the mound.
Tim René de Groot, Anne Margriet Mol, Katherine Mesdag, Pierre Ramond, Rachel Ndhlovu, Julia Catherine Engelmann, Thomas Röckmann, and Helge Niemann
Biogeosciences, 20, 3857–3872, https://doi.org/10.5194/bg-20-3857-2023, https://doi.org/10.5194/bg-20-3857-2023, 2023
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This study investigates methane dynamics in the Wadden Sea. Our measurements revealed distinct variations triggered by seasonality and tidal forcing. The methane budget was higher in warmer seasons but surprisingly high in colder seasons. Methane dynamics were amplified during low tides, flushing the majority of methane into the North Sea or releasing it to the atmosphere. Methanotrophic activity was also elevated during low tide but mitigated only a small fraction of the methane efflux.
Cited articles
Alsina, M. M., Fanton-Borges, A. C., and Smart, D. R.: Spatiotemporal
variation of event related N2O and CH4 emissions during
fertigation in a California almond orchard, Ecosphere, 4, 1–21,
https://doi.org/10.1890/ES12-00236.1, 2013.
Baram, S.: Data for The effect of static chamber base on N2O flux in drip irrigation, V1, Mendeley Data [data set], https://doi.org/10.17632/4ffkytvssp.1, 2022.
Baram, S., Dabach, S., Jerszurki, D., Stockert, C. M., and Smart, D. R.:
Upscaling point measurements of N2O emissions into the orchard scale
under drip and microsprinkler irrigation, Agr. Ecosyst. Environ., 265,
103–111, https://doi.org/10.1016/j.agee.2018.05.022, 2018.
Bateman, E. J. and Baggs, E. M.: Contributions of nitrification and
denitrification to N2O emissions from soils at different water-filled
pore space, Biol. Fertil. Soils, 41, 379–388,
https://doi.org/10.1007/s00374-005-0858-3, 2005.
Burton, D. L., Zebarth, B. J., Gillam, K. M., and MacLeod, J. A.: Effect of
split application of fertilizer nitrogen on N2O emissions from
potatoes, Can. J. Soil Sci., 88, 229–239,
https://doi.org/10.4141/CJSS06007, 2008.
Butterbach-Bahl, K., Baggs, E. M., Dannenmann, M., Kiese, R., and
Zechmeister-Boltenstern, S.: Nitrous oxide emissions from soils: how well do
we understand the processes and their controls?, Philos. T. Roy. Soc.
B, 368, 20130122, https://doi.org/10.1098/rstb.2013.0122,
2013.
Clough, T. J., Rochette, P., Thomas, S. M., Pihlatie, M., Christiansen, J.
R., and Thorman, R. E.: Global Research Alliance N2O chamber
methodology guidelines: Design considerations, J. Environ. Qual., 49,
1081–1091, https://doi.org/10.1002/jeq2.20117, 2020.
Communar, G. and Friedman, S. P.: Relative Water Uptake Rate as a Criterion
for Trickle Irrigation System Design: I. Coupled Source–Sink Steady Water
Flow Model, Soil Sci. Soc. Am. J., 74, 1493–1508,
https://doi.org/10.2136/sssaj2009.0338, 2010a.
Communar, G. and Friedman, S. P.: Relative Water Uptake Rate as a Criterion
for Trickle Irrigation System Design: II. Surface Trickle Irrigation, Soil
Sci. Soc. Am. J., 74, 1509–1517,
https://doi.org/10.2136/sssaj2009.0339, 2010b.
Communar, G. and Friedman, S. P.: General Solution for Steady Infiltration
and Water Uptake in Strip-Shaped, Rectangular, and Cylindrical Domains, Soil
Sci. Soc. Am. J., 75, 2085–2094,
https://doi.org/10.2136/sssaj2011.0088, 2011.
Cowan, N., Levy, P., Maire, J., Coyle, M., Leeson, S. R., Famulari, D.,
Carozzi, M., Nemitz, E., and Skiba, U.: An evaluation of four years of
nitrous oxide fluxes after application of ammonium nitrate and urea
fertilisers measured using the eddy covariance method, Agr. Forest
Meteorol., 280, 107812, https://doi.org/10.1016/j.agrformet.2019.107812, 2020.
Davidson, E. A., Keller, M., Erickson, H. E., Verchot, L. V., and Veldkamp,
E.: Testing a Conceptual Model of Soil Emissions of Nitrous and Nitric
Oxides Using two functions based on soil nitrogen availability and soil
water content, the hole-in-the-pipe model characterizes a large fraction of
the observed variation of nitric oxide and nitrous oxide emissions from
soils, Bioscience, 50, 667–680,
https://doi.org/10.1641/0006-3568(2000)050[0667:tacmos]2.0.co;2, 2000.
Eshel, G., Levy, G. J., Mingelgrin, U., and Singer, M. J.: Critical
Evaluation of the Use of Laser Diffraction for Particle-Size Distribution
Analysis, Soil Sci. Soc. Am. J., 68, 736–743,
https://doi.org/10.2136/sssaj2004.7360, 2004.
Fentabil, M. M., Nichol, C. F., Jones, M. D., Neilsen, G. H., Neilsen, D.,
and Hannam, K. D.: Effect of drip irrigation frequency, nitrogen rate and
mulching on nitrous oxide emissions in a semi-arid climate: An assessment
across two years in an apple orchard, Agr. Ecosyst. Environ., 235,
242–252, 2016.
Friedman, S. P., Communar, G., and Gamliel, A.: DIDAS – User-friendly
software package for assisting drip irrigation design and scheduling,
Comput. Electron. Agr., 120, 36–52,
https://doi.org/10.1016/J.COMPAG.2015.11.007, 2016.
Gardner, W. R.: Some steady-state solutions of the unsaturated moisture flow
equation with application to evaporation from a water table, Soil Sci., 4,
228–232, https://doi.org/10.1097/00010694-195804000-00006, 1958.
Garland, G. M., Suddick, E., Burger, M., Horwath, W. R., and Six, J.: Direct
N2O emissions from a Mediterranean vineyard: Event-related baseline
measurements, Agr. Ecosyst. Environ., 195, 44–52,
https://doi.org/10.1016/j.agee.2014.05.018, 2014.
Healy, R. W., Striegl, R. G., Russell, T. F., Hutchinson, G. L., and
Livingston, G. P.: Numerical Evaluation of Static-Chamber Measurements of
Soil–Atmosphere Gas Exchange: Identification of Physical Processes, Soil
Sci. Soc. Am. J., 60, 740–747,
https://doi.org/10.2136/sssaj1996.03615995006000030009x,
1996.
Heller, H., Bar-Tal, A., Tamir, G., Bloom, P., Venterea, R. T., Chen, D.,
Zhang, Y., Clapp, C. E., and Fine, P.: Effects of Manure and Cultivation on
Carbon Dioxide and Nitrous Oxide Emissions from a Corn Field under
Mediterranean Conditions, J. Environ. Qual., 39, 437,
https://doi.org/10.2134/jeq2009.0027, 2010.
Hénault, C., Bizouard, F., Laville, P., Gabrielle, B., Nicoullaud, B., Germon, J. C., and Cellier, P.: Predicting in situ soil N2O emission using NOE algorithm and soil database, Glob. Change Biol., 11, 115–127, https://doi.org/10.1111/j.1365-2486.2004.00879.x, 2005.
Hénault, C., Bourennane, H., Ayzac, A., Ratié, C., Saby, N. P. A.,
Cohan, J.-P., Eglin, T., and Le Gall, C.: Management of soil pH promotes
nitrous oxide reduction and thus mitigates soil emissions of this greenhouse
gas, Sci. Rep.-UK, 9, 20182, https://doi.org/10.1038/s41598-019-56694-3, 2019.
Hutchinson, G. L. and Livingston, G. P.: Vents and seals in non-steady-state
chambers used for measuring gas exchange between soil and the atmosphere,
Eur. J. Soil Sci., 52, 675–682,
https://doi.org/10.1046/j.1365-2389.2001.00415.x, 2001.
Keller, M. and Reiners, W. A.: Soil-atmosphere exchange of nitrous oxide,
nitric oxide, and methane under secondary succession of pasture to forest in
the Atlantic lowlands of Costa Rica, Global Biogeochem. Cy., 8, 399–409,
https://doi.org/10.1029/94GB01660, 1994.
Lotse, E. G., Jabro, J. D., Simmons, K. E., and Baker, D. E.: Simulation of
nitrogen dynamics and leaching from arable soils, J. Contam. Hydrol., 10,
183–196, https://doi.org/10.1016/0169-7722(92)90060-R,
1992.
Mishra, S., Parker, J. C., and Singhal, N.: Estimation of soil hydraulic
properties and their uncertainty from particle size distribution data, J.
Hydrol., 108, 1–18, https://doi.org/10.1016/0022-1694(89)90275-8, 1989.
Nemera, D. B., Bar-Tal, A., Levy, G. J., Lukyanov, V., Tarchitzky, J.,
Paudel, I., and Cohen, S.: Mitigating negative effects of long-term treated
wastewater application via soil and irrigation manipulations: Sap flow and
water relations of avocado trees (Persea americana Mill.), Agr. Water
Manage., 237, 106178, https://doi.org/10.1016/j.agwat.2020.106178, 2020.
Neuman, S. P., Feddes, R. A., and Bresler, E.: Finite Element Analysis of
Two-Dimensional Flow in Soils Considering Water Uptake by Roots: I. Theory,
Soil Sci. Soc. Am. J., 39, 224–230,
https://doi.org/10.2136/sssaj1975.03615995003900020007x,
1975.
Nye, P. and Tinker, P. B.: Solute Movement in the Soil-Root System,
Blackwell Scientific Publications, Hoboken, NJ, USA, 342 pp., ISBN 9780520034518, 1977.
Parkin, T. B. and Kaspar, T. C.: Nitrous oxide emissions from corn-soybean
systems in the midwest, J. Environ. Qual., 35, 1496–1506, 2006.
Perkins, T. K. and Johnston, O. C.: A Review of Diffusion and Dispersion in
Porous Media, Soc. Petrol. Eng. J., 3, 70–84, https://doi.org/10.2118/480-PA,
1963.
Rabot, E., Cousin, I., and Hénault, C.: A modeling approach of the
relationship between nitrous oxide fluxes from soils and the water-filled
pore space, Biogeochemistry, 122, 395–408,
https://doi.org/10.1007/s10533-014-0048-1, 2015.
Rochette, P. and Eriksen-Hamel, N. S.: Chamber Measurements of Soil Nitrous
Oxide Flux: Are Absolute Values Reliable?, Soil Sci. Soc. Am. J., 72,
331–342, https://doi.org/10.2136/sssaj2007.0215, 2008.
Russo, D. and Bouton, M.: Statistical analysis of spatial variability in
unsaturated flow parameters, Water Resour. Res., 28, 1911–1925,
https://doi.org/10.1029/92WR00669, 1992.
Russo, D. and Kurtzman, D.: Using Desalinated Water for Irrigation: Its
Effect on Field Scale Water Flow and Contaminant Transport under Cropped
Conditions, Water, 11, 687, https://doi.org/10.3390/w11040687,
2019.
Russo, D., Russo, I., and Laufer, A.: On the spatial variability of
parameters of the unsaturated hydraulic conductivity, Water Resour. Res.,
33, 947–956, https://doi.org/10.1029/96WR03947, 1997.
Russo, D., Zaidel, J., Fiori, A., and Laufer, A.: Numerical analysis of flow
and transport from a multiple-source system in a partially saturated
heterogeneous soil under cropped conditions, Water Resour. Res., 42, W06415,
https://doi.org/10.1029/2006WR004923, 2006.
Russo, D., Laufer, A., Shapira, R. H., and Kurtzman, D.: Assessment of
solute fluxes beneath an orchard irrigated with treated sewage water: A
numerical study, Water Resour. Res., 49, 657–674,
https://doi.org/10.1002/wrcr.20085, 2013.
Russo, D., Laufer, A., Bardhan, G., and Levy, G. J.: Salinity control in a
clay soil beneath an orchard irrigated with treated waste water in the
presence of a high water table: A numerical study, J. Hydrol., 531,
198–213, https://doi.org/10.1016/j.jhydrol.2015.04.013,
2015.
Russo, D., Laufer, A., and Bar-Tal, A.: Improving water uptake by trees
planted on a clayey soil and irrigated with low-quality water by various
management means: A numerical study, Agr. Water Manage., 229, 105891,
https://doi.org/10.1016/j.agwat.2019.105891, 2020.
Salgado, E. and Cautin, R.: Avocado root distribution in fine and
coarse-textured soils under drip and microsprinkler irrigation, Agr. Water
Manage., 95, 817–824, 2008.
Sánchez-Martín, L., Arce, A., Benito, A., Garcia-Torres, L., and
Vallejo, A.: Influence of drip and furrow irrigation systems on nitrogen
oxide emissions from a horticultural crop, Soil Biol. Biochem., 40,
1698–1706, https://doi.org/10.1016/j.soilbio.2008.02.005,
2008.
Sanchez-Martín, L., Meijide, A., Garcia-Torres, L., and Vallejo, A.:
Combination of drip irrigation and organic fertilizer for mitigating
emissions of nitrogen oxides in semiarid climate, Agr. Ecosyst. Environ.,
137, 99–107, https://doi.org/10.1016/j.agee.2010.01.006,
2010.
Scheer, C., Wassmann, R., Kienzler, K., Ibragimov, N., and Eschanov, R.:
Nitrous oxide emissions from fertilized, irrigated cotton (Gossypium hirsutum L.) in the Aral Sea Basin, Uzbekistan: Influence of nitrogen
applications and irrigation practices, Soil Biol. Biochem., 40, 290–301,
https://doi.org/10.1016/J.SOILBIO.2007.08.007, 2008.
Schellenberg, D. L., Alsina, M. M., Muhammad, S., Stockert, C. M., Wolff, M.
W., Sanden, B. L., Brown, P. H., and Smart, D. R.: Yield-scaled global
warming potential from N2O emissions and CH4 oxidation for almond
(Prunus dulcis) irrigated with nitrogen fertilizers on arid land, Agr.
Ecosyst. Environ., 155, 7–15, 2012.
Smart, D. R., Alsina, M. M., Wolff, M. W., Matiasek, M. G., Schellenberg, D.
L., Edstrom, J. P., Brown, P. H., and Scow, K. M.: N2O Emissions and
Water Management in California Perennial Crops, in: Understanding Greenhouse
Gas Emissions from Agricultural Management, edited by: Guo, L., Gunasekara,
A., and McConnell, L., ACS Symposium Series, American Chemical Society,
Washington, DC, 227–255, ISBN 9780841226548, 2011.
Tian, D., Zhang, Y., Mu, Y., Zhou, Y., Zhang, C., and Liu, J.: The effect of
drip irrigation and drip fertigation on N2O and NO emissions, water
saving and grain yields in a maize field in the North China Plain, Sci.
Total Environ., 575, 1034–1040, https://doi.org/10.1016/j.scitotenv.2016.09.166, 2017.
Vallejo, A., Meijide, A., Boeckx, P., Arce, A., García-torres, L.,
Aguado, P. L., and Sanchez-martin, L.: Nitrous oxide and methane emissions
from a surface drip-irrigated system combined with fertilizer management,
Eur. J. Soil Sci., 65, 386–395, https://doi.org/10.1111/ejss.12140, 2014.
van Genuchten, M. T.: A Closed-form Equation for Predicting the Hydraulic
Conductivity of Unsaturated Soils, Soil Sci. Soc. Am. J, 44, 892–898, 1980.
Venterea, R. T.: Simplified Method for Quantifying Theoretical
Underestimation of Chamber-Based Trace Gas Fluxes, J. Environ. Qual., 39,
126–135, https://doi.org/10.2134/jeq2009.0231, 2010.
Venterea, R. T., Petersen, S. O., de Klein, C. A. M., Pedersen, A. R.,
Noble, A. D. L., Rees, R. M., Gamble, J. D., and Parkin, T. B.: Global
Research Alliance N2O chamber methodology guidelines: Flux
calculations, J. Environ. Qual., 49, 1141–1155,
https://doi.org/10.1002/jeq2.20118, 2020.
Verhoeven, E. and Six, J.: Biochar does not mitigate field-scale N2O
emissions in a Northern California vineyard: An assessment across two years,
Agr. Ecosyst. Environ., 191, 27–38, https://doi.org/10.1016/j.agee.2014.03.008, 2014.
Wolff, M. W., Schellenberg, D. L., Sanden, B. L., Brown, P. H., and Smart,
D. R.: Reducing Reactive-N Loss from Fertigation: High-Frequency Application
and Fertilizer Selection, in: Poster presented at the annual meeting of the
Almond Board of California, Sacramento, California, USA, 2014.
Wolff, M. W., Hopmans, J. W., Stockert, C. M., Burger, M., Sanden, B. L.,
and Smart, D. R.: Effects of drip fertigation frequency and N-source on soil
N2O production in almonds, Agr. Ecosyst. Environ., 238, 67–77, 2017.
Wu, X. and Zhang, A.: Comparison of three models for simulating N2O
emissions from paddy fields under water-saving irrigation, Atmos. Environ.,
98, 500–509, https://doi.org/10.1016/j.atmosenv.2014.09.029, 2014.
Zebarth, B. J., Rochette, P., Burton, D. L., and Price, M.: Effect of
fertilizer nitrogen management on N2O emissions in commercial corn
fields, Can. J. Soil Sci., 88, 189–195, https://doi.org/10.4141/CJSS06010,
2008.
Zechmeister-Boltenstern, S., Schaufler, G., and Kitzler, B.: NO2,
N2O, CO2 and CH4 fluxes from soils under different land use:
temperature sensitivity and effects of soil moisture, Geophys. Res. Abstr.,
8, 7968, SRef-ID: 1607-7962/gra/EGU2007-A-07968, 2007.
Short summary
Static chambers are the most common tool used to measure greenhouse gas (GHG) fluxes. We tested the impact of such chambers on nitrous oxide emissions in drip irrigation. Field measurements and 3-D simulations show that the chamber base drastically affects the water and nutrient distribution in the soil and hence the measured GHG fluxes. A nomogram is suggested to determine the optimal diameter of a cylindrical chamber that ensures minimal disturbance.
Static chambers are the most common tool used to measure greenhouse gas (GHG) fluxes. We tested...
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