Research article 09 Dec 2021
Research article | 09 Dec 2021
Mercury accumulation in leaves of different plant types – the significance of tissue age and specific leaf area
Håkan Pleijel et al.
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Brigitte Nyirambangutse, Etienne Zibera, Félicien K. Uwizeye, Donat Nsabimana, Elias Bizuru, Håkan Pleijel, Johan Uddling, and Göran Wallin
Biogeosciences, 14, 1285–1303, https://doi.org/10.5194/bg-14-1285-2017, https://doi.org/10.5194/bg-14-1285-2017, 2017
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We investigated the carbon (C) stock and net primary production (NPP) of early (ES) and late successional (LS) forest stands in a tropical montane forest (TMF) in Africa. The total C stock was 35% larger in LS compared to ES stands due to larger tree biomass, while NPP was similar. The results highlight the importance of accounting for disturbance regimes and differences in wood density and allometry between ES and LS tree species when quantifying C stock and sink strength of TMF.
J. Klingberg, M. Engardt, P. E. Karlsson, J. Langner, and H. Pleijel
Biogeosciences, 11, 5269–5283, https://doi.org/10.5194/bg-11-5269-2014, https://doi.org/10.5194/bg-11-5269-2014, 2014
H. Pleijel, H. Danielsson, D. Simpson, and G. Mills
Biogeosciences, 11, 4521–4528, https://doi.org/10.5194/bg-11-4521-2014, https://doi.org/10.5194/bg-11-4521-2014, 2014
Attilio Naccarato, Antonella Tassone, Maria Martino, Sacha Moretti, Antonella Macagnano, Emiliano Zampetti, Paolo Papa, Joshua Avossa, Nicola Pirrone, Michelle Nerentorp, John Munthe, Ingvar Wängberg, Geoff W. Stupple, Carl P. J. Mitchell, Adam R. Martin, Alexandra Steffen, Diana Babi, Eric M. Prestbo, Francesca Sprovieri, and Frank Wania
Atmos. Meas. Tech., 14, 3657–3672, https://doi.org/10.5194/amt-14-3657-2021, https://doi.org/10.5194/amt-14-3657-2021, 2021
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Mercury monitoring in support of the Minamata Convention requires effective and reliable analytical tools. Passive sampling is a promising approach for creating a sustainable long-term network for atmospheric mercury with improved spatial resolution and global coverage. In this study the analytical performance of three passive air samplers (CNR-PAS, IVL-PAS, and MerPAS) was assessed over extended deployment periods and the accuracy of concentrations was judged by comparison with active sampling.
Markus M. Frey, Sarah J. Norris, Ian M. Brooks, Philip S. Anderson, Kouichi Nishimura, Xin Yang, Anna E. Jones, Michelle G. Nerentorp Mastromonaco, David H. Jones, and Eric W. Wolff
Atmos. Chem. Phys., 20, 2549–2578, https://doi.org/10.5194/acp-20-2549-2020, https://doi.org/10.5194/acp-20-2549-2020, 2020
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A winter sea ice expedition to Antarctica provided the first direct observations of sea salt aerosol (SSA) production during snow storms above sea ice, thereby validating a model hypothesis to account for winter time SSA maxima in Antarctica not explained otherwise. Defining SSA sources is important given the critical roles that aerosol plays for climate, for air quality and as a potential ice core proxy for sea ice conditions in the past.
Brigitte Nyirambangutse, Etienne Zibera, Félicien K. Uwizeye, Donat Nsabimana, Elias Bizuru, Håkan Pleijel, Johan Uddling, and Göran Wallin
Biogeosciences, 14, 1285–1303, https://doi.org/10.5194/bg-14-1285-2017, https://doi.org/10.5194/bg-14-1285-2017, 2017
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We investigated the carbon (C) stock and net primary production (NPP) of early (ES) and late successional (LS) forest stands in a tropical montane forest (TMF) in Africa. The total C stock was 35% larger in LS compared to ES stands due to larger tree biomass, while NPP was similar. The results highlight the importance of accounting for disturbance regimes and differences in wood density and allometry between ES and LS tree species when quantifying C stock and sink strength of TMF.
Francesca Sprovieri, Nicola Pirrone, Mariantonia Bencardino, Francesco D'Amore, Helene Angot, Carlo Barbante, Ernst-Günther Brunke, Flor Arcega-Cabrera, Warren Cairns, Sara Comero, María del Carmen Diéguez, Aurélien Dommergue, Ralf Ebinghaus, Xin Bin Feng, Xuewu Fu, Patricia Elizabeth Garcia, Bernd Manfred Gawlik, Ulla Hageström, Katarina Hansson, Milena Horvat, Jože Kotnik, Casper Labuschagne, Olivier Magand, Lynwill Martin, Nikolay Mashyanov, Thumeka Mkololo, John Munthe, Vladimir Obolkin, Martha Ramirez Islas, Fabrizio Sena, Vernon Somerset, Pia Spandow, Massimiliano Vardè, Chavon Walters, Ingvar Wängberg, Andreas Weigelt, Xu Yang, and Hui Zhang
Atmos. Chem. Phys., 17, 2689–2708, https://doi.org/10.5194/acp-17-2689-2017, https://doi.org/10.5194/acp-17-2689-2017, 2017
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The results on total mercury (THg) wet deposition flux obtained within the GMOS network have been presented and discussed to understand the atmospheric Hg cycling and its seasonal depositional patterns over the 2011–2015 period. The data set provides new insight into baseline concentrations of THg concentrations in precipitation particularly in regions where wet deposition and atmospheric Hg species were not investigated before, opening the way for additional measurements and modeling studies.
Ingvar Wängberg, Michelle G. Nerentorp Mastromonaco, John Munthe, and Katarina Gårdfeldt
Atmos. Chem. Phys., 16, 13379–13387, https://doi.org/10.5194/acp-16-13379-2016, https://doi.org/10.5194/acp-16-13379-2016, 2016
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Within the EU-funded project, Global Mercury Observation System (GMOS) airborne mercury has been monitored at the background Råö measurement site on the western coast of Sweden from May 2012 to the end of May 2015, the following mercury species/fractions were measured: gaseous elemental mercury (GEM), particulate bound mercury (PBM) and gaseous oxidised mercury (GOM). Evidence that a significant part of the GOM measured at the Råö site has been formed in the free tropospheric air is presented.
Jozef M. Pacyna, Oleg Travnikov, Francesco De Simone, Ian M. Hedgecock, Kyrre Sundseth, Elisabeth G. Pacyna, Frits Steenhuisen, Nicola Pirrone, John Munthe, and Karin Kindbom
Atmos. Chem. Phys., 16, 12495–12511, https://doi.org/10.5194/acp-16-12495-2016, https://doi.org/10.5194/acp-16-12495-2016, 2016
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An assessment of current and future emissions, air concentrations and atmospheric deposition of mercury worldwide is presented on the basis of results obtained during the performance of the EU GMOS (Global Mercury Observation System) project. Emission estimates for mercury were prepared with the main goal of applying them in models to assess current (2013) and future (2035) air concentrations and atmospheric deposition of this contaminant.
Francesca Sprovieri, Nicola Pirrone, Mariantonia Bencardino, Francesco D'Amore, Francesco Carbone, Sergio Cinnirella, Valentino Mannarino, Matthew Landis, Ralf Ebinghaus, Andreas Weigelt, Ernst-Günther Brunke, Casper Labuschagne, Lynwill Martin, John Munthe, Ingvar Wängberg, Paulo Artaxo, Fernando Morais, Henrique de Melo Jorge Barbosa, Joel Brito, Warren Cairns, Carlo Barbante, María del Carmen Diéguez, Patricia Elizabeth Garcia, Aurélien Dommergue, Helene Angot, Olivier Magand, Henrik Skov, Milena Horvat, Jože Kotnik, Katie Alana Read, Luis Mendes Neves, Bernd Manfred Gawlik, Fabrizio Sena, Nikolay Mashyanov, Vladimir Obolkin, Dennis Wip, Xin Bin Feng, Hui Zhang, Xuewu Fu, Ramesh Ramachandran, Daniel Cossa, Joël Knoery, Nicolas Marusczak, Michelle Nerentorp, and Claus Norstrom
Atmos. Chem. Phys., 16, 11915–11935, https://doi.org/10.5194/acp-16-11915-2016, https://doi.org/10.5194/acp-16-11915-2016, 2016
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This work presents atmospheric Hg concentrations recorded within the GMOS global network analyzing Hg measurement results in terms of temporal trends, seasonality and comparability within the network. The over-arching benefit of this coordinated Hg monitoring network would clearly be the production of high-quality measurement datasets on a global scale useful in developing and validating models on different spatial and temporal scales.
J. Klingberg, M. Engardt, P. E. Karlsson, J. Langner, and H. Pleijel
Biogeosciences, 11, 5269–5283, https://doi.org/10.5194/bg-11-5269-2014, https://doi.org/10.5194/bg-11-5269-2014, 2014
H. Pleijel, H. Danielsson, D. Simpson, and G. Mills
Biogeosciences, 11, 4521–4528, https://doi.org/10.5194/bg-11-4521-2014, https://doi.org/10.5194/bg-11-4521-2014, 2014
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Distinguishing between early- and late-covering crops in the land surface model Noah-MP: impact on simulated surface energy fluxes and temperature
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Evaluating multi-year, multi-site data on the energy balance closure of eddy-covariance flux measurements at cropland sites in southwestern Germany
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Global atmospheric CO2 inverse models converging on neutral tropical land exchange, but disagreeing on fossil fuel and atmospheric growth rate
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The formation of ice in clouds is critically important for the planet's climate. Hence, we need to know which aerosol types nucleate ice and how effectively they do so. Here we show that virus particles, with a range of architectures, nucleate ice when immersed in supercooled water. However, we also show that they only make a minor contribution to the ice-nucleating particle population in the terrestrial atmosphere, but we cannot rule them out as being important in the marine environment.
Laura Heimsch, Annalea Lohila, Juha-Pekka Tuovinen, Henriikka Vekuri, Jussi Heinonsalo, Olli Nevalainen, Mika Korkiakoski, Jari Liski, Tuomas Laurila, and Liisa Kulmala
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CO2 and H2O fluxes were measured at a newly established eddy covariance site in southern Finland for 2 years from 2018 to 2020. This agricultural grassland site focuses on the conversion from intensive towards more sustainable agricultural management. The first summer experienced prolonged dry periods, and notably larger fluxes were observed in the second summer. The field acted as a net carbon sink during both study years.
Anteneh Getachew Mengistu, Gizaw Mengistu Tsidu, Gerbrand Koren, Maurits L. Kooreman, K. Folkert Boersma, Torbern Tagesson, Jonas Ardö, Yann Nouvellon, and Wouter Peters
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In this study, we assess the usefulness of Sun-Induced Fluorescence of Terrestrial Ecosystems Retrieval (SIFTER) data from the GOME-2A instrument and near-infrared reflectance of vegetation (NIRv) from MODIS to capture the seasonality and magnitudes of gross primary production (GPP) derived from six eddy-covariance flux towers in Africa in the overlap years between 2007–2014. We also test the robustness of sun-induced fluoresence and NIRv to compare the seasonality of GPP for the major biomes.
Robbie Ramsay, Chiara F. Di Marco, Mathew R. Heal, Matthias Sörgel, Paulo Artaxo, Meinrat O. Andreae, and Eiko Nemitz
Biogeosciences, 18, 2809–2825, https://doi.org/10.5194/bg-18-2809-2021, https://doi.org/10.5194/bg-18-2809-2021, 2021
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The exchange of the gas ammonia between the atmosphere and the surface is an important biogeochemical process, but little is known of this exchange for certain ecosystems, such as the Amazon rainforest. This study took measurements of ammonia exchange over an Amazon rainforest site and subsequently modelled the observed deposition and emission patterns. We observed emissions of ammonia from the rainforest, which can be simulated accurately by using a canopy resistance modelling approach.
Gemma Purser, Julia Drewer, Mathew R. Heal, Robert A. S. Sircus, Lara K. Dunn, and James I. L. Morison
Biogeosciences, 18, 2487–2510, https://doi.org/10.5194/bg-18-2487-2021, https://doi.org/10.5194/bg-18-2487-2021, 2021
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Short-rotation forest plantations could help reduce greenhouse gases but can emit biogenic volatile organic compounds. Emissions were measured at a plantation trial in Scotland. Standardised emissions of isoprene from foliage were higher from hybrid aspen than from Sitka spruce and low from Italian alder. Emissions of total monoterpene were lower. The forest floor was only a small source. Model estimates suggest an SRF expansion of 0.7 Mha could increase total UK emissions between < 1 %–35 %.
Daniel Diaz-de-Quijano, Aleksander Vladimirovich Ageev, Elena Anatolevna Ivanova, and Olesia Valerevna Anishchenko
Biogeosciences, 18, 1601–1618, https://doi.org/10.5194/bg-18-1601-2021, https://doi.org/10.5194/bg-18-1601-2021, 2021
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Winter atmospheric nitrogen (N) and phosphorus (P) depositions were measured for the first time in the Western Sayan Mountains (Siberia). The low and very low atmospheric N and P depositions could be responsible for the observed lake phytoplankton N–P colimitation. We hypothesize that slight imbalances in the nutrient deposition, as expected in the context of global change (climate, forest fires and anthropogenic nitrogen emissions), could have important effects on the ecology of these lakes.
Paul C. Stoy, Adam A. Cook, John E. Dore, Natascha Kljun, William Kleindl, E. N. Jack Brookshire, and Tobias Gerken
Biogeosciences, 18, 961–975, https://doi.org/10.5194/bg-18-961-2021, https://doi.org/10.5194/bg-18-961-2021, 2021
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The reintroduction of American bison creates multiple environmental benefits. Ruminants like bison also emit methane – a potent greenhouse gas – to the atmosphere, which has not been measured to date in a field setting. We measured methane efflux from an American bison herd during winter using eddy covariance. Automated cameras were used to approximate their location to calculate per-animal flux. From the measurements, bison do not emit more methane than the cattle they often replace.
Philipp A. Nauer, Eleonora Chiri, Thanavit Jirapanjawat, Chris Greening, and Perran L. M. Cook
Biogeosciences, 18, 729–737, https://doi.org/10.5194/bg-18-729-2021, https://doi.org/10.5194/bg-18-729-2021, 2021
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Hydrogen (H2) and carbon monoxide (CO) are atmospheric trace gases cycled via microbial metabolisms. We observed strong H2 and CO contamination from rubber septa used to seal common gas sample storage vials. Here we propose a simple and inexpensive modification of such vials to allow reliable storage of H2, CO and methane trace-gas samples for timescales of weeks to months, thus enabling extensive field campaigns to investigate H2 and CO biogeochemistry in remote areas.
Thomas M. Blattmann
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-4, https://doi.org/10.5194/bg-2021-4, 2021
Revised manuscript accepted for BG
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This work enunciates the possibility of kerogen oxidation as a major driver of atmospheric CO2 increase in the wake of glacial episodes. This hypothesis is substantiated by several lines of independent evidence synthesized in this contribution. The author hypothesizes that the deglaciation of kerogen-rich lithologies in western Canada contributed majorly to the characteristic deglacial increase in atmospheric CO2.
Jize Jiang, David S. Stevenson, Aimable Uwizeye, Giuseppe Tempio, and Mark A. Sutton
Biogeosciences, 18, 135–158, https://doi.org/10.5194/bg-18-135-2021, https://doi.org/10.5194/bg-18-135-2021, 2021
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Ammonia is a key water and air pollutant and impacts human health and climate change. Ammonia emissions mainly originate from agriculture. We find that chicken agriculture contributes to large ammonia emissions, especially in hot and wet regions. These emissions can be greatly affected by the local environment, i.e. temperature and humidity, and also by human management. We develop a model that suggests ammonia emissions from chicken farming are likely to increase under a warming climate.
Richard Wehr and Scott R. Saleska
Biogeosciences, 18, 13–24, https://doi.org/10.5194/bg-18-13-2021, https://doi.org/10.5194/bg-18-13-2021, 2021
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Water and carbon exchange between plants and the atmosphere is governed by stomata: adjustable pores in the surfaces of leaves. The combined gas conductance of all the stomata in a canopy has long been estimated using an equation that is shown here to be systematically incorrect because it relies on measurements that are generally inadequate. An alternative approach is shown to be more accurate in all probable scenarios and to imply different responses of stomatal conductance to the environment.
Juliana Gil-Loaiza, Joseph R. Roscioli, Joanne H. Shorter, Till H. M. Volkmann, Wei-Ren Ng, Jordan E. Krechmer, and Laura K. Meredith
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-401, https://doi.org/10.5194/bg-2020-401, 2020
Revised manuscript accepted for BG
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We evaluated a new diffusive soil probe integrated with high-resolution gas analyzers to measure soil gases in real-time at a centimeter-scale. Using columns with simple silica and soil, we captured changes in carbon dioxide (CO2), volatile organic compounds (VOCs), and nitrous oxide (N2O) with its isotopes to distinguish potential nutrient sources and microbial metabolism. This approach will advance the use of soil gases as important signals to understand and monitor soil fertility and health.
Bart Schilperoort, Miriam Coenders-Gerrits, César Jiménez Rodríguez, Christiaan van der Tol, Bas van de Wiel, and Hubert Savenije
Biogeosciences, 17, 6423–6439, https://doi.org/10.5194/bg-17-6423-2020, https://doi.org/10.5194/bg-17-6423-2020, 2020
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With distributed temperature sensing (DTS) we measured a vertical temperature profile in a forest, from the forest floor to above the treetops. Using this temperature profile we can see which parts of the forest canopy are colder (thus more dense) or warmer (and less dense) and study the effect this has on the suppression of turbulent mixing. This can be used to improve our knowledge of the interaction between the atmosphere and forests and improve carbon dioxide flux measurements over forests.
Yayi Niu, Yuqiang Li, Hanbo Yun, Xuyang Wang, Xiangwen Gong, Yulong Duan, and Jing Liu
Biogeosciences, 17, 6309–6326, https://doi.org/10.5194/bg-17-6309-2020, https://doi.org/10.5194/bg-17-6309-2020, 2020
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We report the results from continuous year-round CO2 observations from a sandy grassland in the Horqin Sandy Land using the eddy covariance technique. To quantify the diurnal, seasonal, and annual variation in net ecosystem CO2 exchange, gross primary productivity, and ecosystem respiration and to identify the different scales of environmental factors and the underlying mechanisms, we also explored how the annual precipitation affects the net ecosystem CO2 exchange and its components.
Hélène Angot, Katelyn McErlean, Lu Hu, Dylan B. Millet, Jacques Hueber, Kaixin Cui, Jacob Moss, Catherine Wielgasz, Tyler Milligan, Damien Ketcherside, M. Syndonia Bret-Harte, and Detlev Helmig
Biogeosciences, 17, 6219–6236, https://doi.org/10.5194/bg-17-6219-2020, https://doi.org/10.5194/bg-17-6219-2020, 2020
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We report biogenic volatile organic compounds (BVOCs) ambient levels and emission rates from key vegetation species in the Alaskan arctic tundra, providing a new data set to further constrain isoprene chemistry under low NOx conditions in models. We add to the growing body of evidence that climate-induced changes in the vegetation composition will significantly affect the BVOC emission potential of the tundra, with implications for atmospheric oxidation processes and climate feedbacks.
Teresa M. Seifried, Paul Bieber, Laura Felgitsch, Julian Vlasich, Florian Reyzek, David G. Schmale III, and Hinrich Grothe
Biogeosciences, 17, 5655–5667, https://doi.org/10.5194/bg-17-5655-2020, https://doi.org/10.5194/bg-17-5655-2020, 2020
Dario Papale
Biogeosciences, 17, 5587–5598, https://doi.org/10.5194/bg-17-5587-2020, https://doi.org/10.5194/bg-17-5587-2020, 2020
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FLUXNET is a large, bottom-up, self-coordinated network of sites. It provided ecosystem–atmosphere greenhouse gas fluxes from stations around the world that were used as bases for a large number of publications and studies. Today many applications require recent updates on the data to track more closely the ecosystem responses to climate change and link ground data with satellite programs. For this reason, a new organization of FLUXNET is needed, keeping as its target the FAIR principles.
Christian Markwitz, Alexander Knohl, and Lukas Siebicke
Biogeosciences, 17, 5183–5208, https://doi.org/10.5194/bg-17-5183-2020, https://doi.org/10.5194/bg-17-5183-2020, 2020
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Agroforestry has been shown to alter the microclimate and to lead to higher carbon sequestration above ground and in the soil. In this study, we investigated the impact of agroforestry systems on system-scale evapotranspiration (ET) due to concerns about increased water losses to the atmosphere. Results showed small differences in annual sums of ET over agroforestry relative to monoculture systems, indicating that agroforestry in Germany can be a land use alternative to monoculture agriculture.
Arnaud P. Praplan, Toni Tykkä, Simon Schallhart, Virpi Tarvainen, Jaana Bäck, and Heidi Hellén
Biogeosciences, 17, 4681–4705, https://doi.org/10.5194/bg-17-4681-2020, https://doi.org/10.5194/bg-17-4681-2020, 2020
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In this paper, we study emissions of volatile organic compounds (VOCs) from three boreal tree species. Individual compounds are quantified with on-line separation analytical techniques, while the total reactivity of the emissions is measured using a custom-built instrument. On some occasions, in particular when the trees suffer from stress, the total reactivity measured is higher than the sum of the reactivity of individual compounds. This indicates that the threes emit VOCs that remain unknown.
June Skeeter, Andreas Christen, Andrée-Anne Laforce, Elyn Humphreys, and Greg Henry
Biogeosciences, 17, 4421–4441, https://doi.org/10.5194/bg-17-4421-2020, https://doi.org/10.5194/bg-17-4421-2020, 2020
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This study investigates carbon fluxes at Illisarvik, an artificial drained thermokarst lake basin (DTLB) in Canada's Northwest Territories. This is the first carbon balance study in a DTLB outside of Alaska. We used neural networks to identify the factors controlling fluxes and to model the effects of the controlling factors. We discuss the role of vegetation heterogeneity in fluxes, especially of methane, and we show how the carbon fluxes differ from Alaskan DTLBs.
Anne J. Hoek van Dijke, Kaniska Mallick, Martin Schlerf, Miriam Machwitz, Martin Herold, and Adriaan J. Teuling
Biogeosciences, 17, 4443–4457, https://doi.org/10.5194/bg-17-4443-2020, https://doi.org/10.5194/bg-17-4443-2020, 2020
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We investigated the link between the vegetation leaf area index (LAI) and the land–atmosphere exchange of water, energy, and carbon fluxes. We show that the correlation between the LAI and water and energy fluxes depends on the vegetation type and aridity. For carbon fluxes, however, the correlation with the LAI was strong and independent of vegetation and aridity. This study provides insight into when the vegetation LAI can be used to model or extrapolate land–atmosphere fluxes.
Jordi Vilà-Guerau de Arellano, Patrizia Ney, Oscar Hartogensis, Hugo de Boer, Kevin van Diepen, Dzhaner Emin, Geiske de Groot, Anne Klosterhalfen, Matthias Langensiepen, Maria Matveeva, Gabriela Miranda-García, Arnold F. Moene, Uwe Rascher, Thomas Röckmann, Getachew Adnew, Nicolas Brüggemann, Youri Rothfuss, and Alexander Graf
Biogeosciences, 17, 4375–4404, https://doi.org/10.5194/bg-17-4375-2020, https://doi.org/10.5194/bg-17-4375-2020, 2020
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The CloudRoots field experiment has obtained an open comprehensive observational data set that includes soil, plant, and atmospheric variables to investigate the interactions between a heterogeneous land surface and its overlying atmospheric boundary layer, including the rapid perturbations of clouds in evapotranspiration. Our findings demonstrate that in order to understand and represent diurnal variability, we need to measure and model processes from the leaf to the landscape scales.
Dean Howard, Yannick Agnan, Detlev Helmig, Yu Yang, and Daniel Obrist
Biogeosciences, 17, 4025–4042, https://doi.org/10.5194/bg-17-4025-2020, https://doi.org/10.5194/bg-17-4025-2020, 2020
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The Arctic tundra represents a vast store of carbon that may be broken down by microbial activity into greenhouse gases such as CO2 and CH4. Though microbes are less active in winter, the long duration of the cold season makes this period very important for carbon cycling. We show that, under conditions of warmer winter air temperatures and greater snowfall, deeper soils can remain warm enough to sustain significantly enhanced CH4 emission. This could have large implications for future climates.
Kristina Bohm, Joachim Ingwersen, Josipa Milovac, and Thilo Streck
Biogeosciences, 17, 2791–2805, https://doi.org/10.5194/bg-17-2791-2020, https://doi.org/10.5194/bg-17-2791-2020, 2020
Domenico Vitale, Gerardo Fratini, Massimo Bilancia, Giacomo Nicolini, Simone Sabbatini, and Dario Papale
Biogeosciences, 17, 1367–1391, https://doi.org/10.5194/bg-17-1367-2020, https://doi.org/10.5194/bg-17-1367-2020, 2020
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This work describes a data cleaning procedure for the detection of eddy covariance fluxes affected by systematic errors. We believe that the proposed procedure can serve as a basis toward a unified quality control strategy suitable for the centralized data processing pipelines, where the use of completely data-driven and scalable procedures that guarantee high-quality standards and reproducibility of the released products constitutes an essential prerequisite.
Martin Jung, Christopher Schwalm, Mirco Migliavacca, Sophia Walther, Gustau Camps-Valls, Sujan Koirala, Peter Anthoni, Simon Besnard, Paul Bodesheim, Nuno Carvalhais, Frédéric Chevallier, Fabian Gans, Daniel S. Goll, Vanessa Haverd, Philipp Köhler, Kazuhito Ichii, Atul K. Jain, Junzhi Liu, Danica Lombardozzi, Julia E. M. S. Nabel, Jacob A. Nelson, Michael O'Sullivan, Martijn Pallandt, Dario Papale, Wouter Peters, Julia Pongratz, Christian Rödenbeck, Stephen Sitch, Gianluca Tramontana, Anthony Walker, Ulrich Weber, and Markus Reichstein
Biogeosciences, 17, 1343–1365, https://doi.org/10.5194/bg-17-1343-2020, https://doi.org/10.5194/bg-17-1343-2020, 2020
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We test the approach of producing global gridded carbon fluxes based on combining machine learning with local measurements, remote sensing and climate data. We show that we can reproduce seasonal variations in carbon assimilated by plants via photosynthesis and in ecosystem net carbon balance. The ecosystem’s mean carbon balance and carbon flux trends require cautious interpretation. The analysis paves the way for future improvements of the data-driven assessment of carbon fluxes.
Samantha J. Basile, Xin Lin, William R. Wieder, Melannie D. Hartman, and Gretchen Keppel-Aleks
Biogeosciences, 17, 1293–1308, https://doi.org/10.5194/bg-17-1293-2020, https://doi.org/10.5194/bg-17-1293-2020, 2020
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Soil heterotrophic respiration (HR) is an important component of land–atmosphere carbon exchange but is difficult to observe globally. We analyzed the imprint that this flux leaves on atmospheric CO2 using a set of simulations from HR models with common inputs. Models that represent microbial processes are more variable and have stronger temperature sensitivity than those that do not. Our results show that we can use atmospheric CO2 observations to evaluate and improve models of HR.
Christopher Krich, Jakob Runge, Diego G. Miralles, Mirco Migliavacca, Oscar Perez-Priego, Tarek El-Madany, Arnaud Carrara, and Miguel D. Mahecha
Biogeosciences, 17, 1033–1061, https://doi.org/10.5194/bg-17-1033-2020, https://doi.org/10.5194/bg-17-1033-2020, 2020
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Causal inference promises new insight into biosphere–atmosphere interactions using time series only. To understand the behaviour of a specific method on such data, we used artificial and observation-based data. The observed structures are very interpretable and reveal certain ecosystem-specific behaviour, as only a few relevant links remain, in contrast to pure correlation techniques. Thus, causal inference allows to us gain well-constrained insights into processes and interactions.
Alexander J. Turner, Philipp Köhler, Troy S. Magney, Christian Frankenberg, Inez Fung, and Ronald C. Cohen
Biogeosciences, 17, 405–422, https://doi.org/10.5194/bg-17-405-2020, https://doi.org/10.5194/bg-17-405-2020, 2020
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We present the highest resolution solar-induced chlorophyll fluorescence (SIF) dataset from satellite measurements, providing previously unobservable phenomena related to plant photosynthesis. We find a strong correspondence between TROPOMI SIF and AmeriFlux GPP. We then observe a double peak in the seasonality of California's photosynthesis, not seen by traditional vegetation indices (e.g., MODIS). This is further corroborated by EOF/PC analysis.
Nicholas Cowan, Peter Levy, Andrea Moring, Ivan Simmons, Colin Bache, Amy Stephens, Joana Marinheiro, Jocelyn Brichet, Ling Song, Amy Pickard, Connie McNeill, Roseanne McDonald, Juliette Maire, Benjamin Loubet, Polina Voylokov, Mark Sutton, and Ute Skiba
Biogeosciences, 16, 4731–4745, https://doi.org/10.5194/bg-16-4731-2019, https://doi.org/10.5194/bg-16-4731-2019, 2019
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Commonly used nitrogen fertilisers, ammonium nitrate, urea and urea coated with a urease inhibitor, were applied to experimental plots. Fertilisation with ammonium nitrate supported the largest yields but also resulted in the largest nitrous oxide emissions. Urea was the largest emitter of ammonia. The coated urea did not significantly increase yields; however, ammonia emissions were substantially smaller than urea. The coated urea was the best environmentally but is economically unattractive.
Boris Bonn, Ruth-Kristina Magh, Joseph Rombach, and Jürgen Kreuzwieser
Biogeosciences, 16, 4627–4645, https://doi.org/10.5194/bg-16-4627-2019, https://doi.org/10.5194/bg-16-4627-2019, 2019
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The effect of soil water availability (SWA) on emissions of isoprenoids by trees was studied by setting up a parameterization from published data. SWA impact on isoprene emissions can be described by a growth type curve, while monoterpene emissions display a pattern reflecting plants’ stomata opening. Sesquiterpene fluxes tend to increase at the start of severe drought until resources decline. Feedbacks on atmospheric processes such as ozone and aerosol particles are further studied.
Martin Jiskra, Jeroen E. Sonke, Yannick Agnan, Detlev Helmig, and Daniel Obrist
Biogeosciences, 16, 4051–4064, https://doi.org/10.5194/bg-16-4051-2019, https://doi.org/10.5194/bg-16-4051-2019, 2019
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The tundra plays a pivotal role in Arctic mercury cycling by storing atmospheric mercury deposition and shuttling it to the Arctic Ocean. We used the isotopic fingerprint of mercury to investigate the processes controlling atmospheric mercury deposition. We found that the uptake of atmospheric mercury by vegetation was the major deposition source. Direct deposition to snow or soils only played a minor role. These results improve our understanding of Arctic mercury cycling.
Paul C. Stoy, Tarek S. El-Madany, Joshua B. Fisher, Pierre Gentine, Tobias Gerken, Stephen P. Good, Anne Klosterhalfen, Shuguang Liu, Diego G. Miralles, Oscar Perez-Priego, Angela J. Rigden, Todd H. Skaggs, Georg Wohlfahrt, Ray G. Anderson, A. Miriam J. Coenders-Gerrits, Martin Jung, Wouter H. Maes, Ivan Mammarella, Matthias Mauder, Mirco Migliavacca, Jacob A. Nelson, Rafael Poyatos, Markus Reichstein, Russell L. Scott, and Sebastian Wolf
Biogeosciences, 16, 3747–3775, https://doi.org/10.5194/bg-16-3747-2019, https://doi.org/10.5194/bg-16-3747-2019, 2019
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Key findings are the nearly optimal response of T to atmospheric water vapor pressure deficits across methods and scales. Additionally, the notion that T / ET intermittently approaches 1, which is a basis for many partitioning methods, does not hold for certain methods and ecosystems. To better constrain estimates of E and T from combined ET measurements, we propose a combination of independent measurement techniques to better constrain E and T at the ecosystem scale.
Christian Stiegler, Ana Meijide, Yuanchao Fan, Ashehad Ashween Ali, Tania June, and Alexander Knohl
Biogeosciences, 16, 2873–2890, https://doi.org/10.5194/bg-16-2873-2019, https://doi.org/10.5194/bg-16-2873-2019, 2019
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We show the response of a commercial oil palm plantation in Indonesia to the extreme El Niño–Southern Oscillation (ENSO) event in 2015. Our measurements and model suggest that without human-induced forest fires and related smoke emissions, the observed negative impact on oil palm carbon dioxide greenhouse gas fluxes, carbon accumulation and yield due to ENSO-related drought would have been less pronounced. With respect to climate change we highlight the importance of fire prevention in the area.
Sven Boese, Martin Jung, Nuno Carvalhais, Adriaan J. Teuling, and Markus Reichstein
Biogeosciences, 16, 2557–2572, https://doi.org/10.5194/bg-16-2557-2019, https://doi.org/10.5194/bg-16-2557-2019, 2019
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This study examines how limited water availability during droughts affects water-use efficiency. This metric describes how much carbon an ecosystem can assimilate for each unit of water lost by transpiration. We test how well different water-use efficiency models can capture the dynamics of transpiration decrease due to increased soil-water limitation. Accounting for the interacting effects of radiation and water limitation is necessary to accurately predict transpiration during these periods.
Raia Silvia Massad, Juliette Lathière, Susanna Strada, Mathieu Perrin, Erwan Personne, Marc Stéfanon, Patrick Stella, Sophie Szopa, and Nathalie de Noblet-Ducoudré
Biogeosciences, 16, 2369–2408, https://doi.org/10.5194/bg-16-2369-2019, https://doi.org/10.5194/bg-16-2369-2019, 2019
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Human activities strongly interfere in the land–atmosphere interactions through changes in land use and land cover changes and land management. The objectives of this review are to synthesize the existing experimental and modelling works that investigate physical, chemical, and biogeochemical interactions between land surface and the atmosphere. Greater consideration of atmospheric chemistry, through land–atmosphere interactions, as a decision parameter for land management is essential.
Yuzo Miyazaki, Divyavani Gowda, Eri Tachibana, Yoshiyuki Takahashi, and Tsutom Hiura
Biogeosciences, 16, 2181–2188, https://doi.org/10.5194/bg-16-2181-2019, https://doi.org/10.5194/bg-16-2181-2019, 2019
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Fatty alcohols (FAs) are major components of surface lipids and can act as surface-active atmospheric organic aerosols, influencing the cloud formation. We identified five secondary FAs in atmospheric aerosols at two temperate forest sites and revealed their distinct seasonal variation for the first time. Our results suggest that they originated mostly from plant wax and could be used as useful tracers for primary biological aerosol particles.
Claire Delon, Corinne Galy-Lacaux, Dominique Serça, Erwan Personne, Eric Mougin, Marcellin Adon, Valérie Le Dantec, Benjamin Loubet, Rasmus Fensholt, and Torbern Tagesson
Biogeosciences, 16, 2049–2077, https://doi.org/10.5194/bg-16-2049-2019, https://doi.org/10.5194/bg-16-2049-2019, 2019
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In the Sahel region during the wet season, CO2 and NO are released to the atmosphere, and NH3 is deposited on the soil. During the dry season, processes are strongly reduced. This paper shows the temporal variation in these soil–atmosphere exchanges of trace gases for 2 years, their sharp increase when the first rains fall onto dry soils, and how microbial processes are involved. We use a modelling approach, which is necessary when continuous measurements are not possible in remote regions.
Anne Sofie Lansø, Thomas Luke Smallman, Jesper Heile Christensen, Mathew Williams, Kim Pilegaard, Lise-Lotte Sørensen, and Camilla Geels
Biogeosciences, 16, 1505–1524, https://doi.org/10.5194/bg-16-1505-2019, https://doi.org/10.5194/bg-16-1505-2019, 2019
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Although coastal regions only amount to 7 % of the global oceans, their contribution to the global oceanic surface exchange of CO2 is much greater. In this study, we gain detailed insight into how these coastal marine fluxes compare to CO2 exchange from coastal land regions. Annually, the coastal marine exchanges are smaller than the total uptake of CO2 from the land surfaces within the study area but comparable in size to terrestrial fluxes from individual land cover classes of the region.
Ravshan Eshonkulov, Arne Poyda, Joachim Ingwersen, Hans-Dieter Wizemann, Tobias K. D. Weber, Pascal Kremer, Petra Högy, Alim Pulatov, and Thilo Streck
Biogeosciences, 16, 521–540, https://doi.org/10.5194/bg-16-521-2019, https://doi.org/10.5194/bg-16-521-2019, 2019
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We compared the energy balance closure (EBC) under varying environmental conditions and investigated a wide range of possible reasons for the energy imbalance. As measures for the imbalance, we used ordinary linear regression, the energy balance ratio (EBR), and the energy residual. The EBR was also investigated as a function of buoyancy, friction velocity, and atmospheric stability. Moreover, the relationship between the EBC and flux source area or footprint was also investigated.
Juha-Pekka Tuovinen, Mika Aurela, Juha Hatakka, Aleksi Räsänen, Tarmo Virtanen, Juha Mikola, Viktor Ivakhov, Vladimir Kondratyev, and Tuomas Laurila
Biogeosciences, 16, 255–274, https://doi.org/10.5194/bg-16-255-2019, https://doi.org/10.5194/bg-16-255-2019, 2019
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We analysed ecosystem-scale measurements of methane exchange between Arctic tundra and the atmosphere, taking into account the large variations in vegetation and soil properties. The measurements are spatial averages, but using meteorological and statistical modelling techniques we could estimate methane emissions for different land cover types and quantify how well the measurements correspond to the spatial variability. This provides a more accurate estimate of the regional methane emission.
Benjamin Gaubert, Britton B. Stephens, Sourish Basu, Frédéric Chevallier, Feng Deng, Eric A. Kort, Prabir K. Patra, Wouter Peters, Christian Rödenbeck, Tazu Saeki, David Schimel, Ingrid Van der Laan-Luijkx, Steven Wofsy, and Yi Yin
Biogeosciences, 16, 117–134, https://doi.org/10.5194/bg-16-117-2019, https://doi.org/10.5194/bg-16-117-2019, 2019
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We have compared global carbon budgets calculated from numerical inverse models and CO2 observations, and evaluated how these systems reproduce vertical gradients in atmospheric CO2 from aircraft measurements. We found that available models have converged on near-neutral tropical total fluxes for several decades, implying consistent sinks in intact tropical forests, and that assumed fossil fuel emissions and predicted atmospheric growth rates are now the dominant axes of disagreement.
Archana Dayalu, J. William Munger, Steven C. Wofsy, Yuxuan Wang, Thomas Nehrkorn, Yu Zhao, Michael B. McElroy, Chris P. Nielsen, and Kristina Luus
Biogeosciences, 15, 6713–6729, https://doi.org/10.5194/bg-15-6713-2018, https://doi.org/10.5194/bg-15-6713-2018, 2018
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Accounting for the vegetation signal is critical for comprehensive CO2 budget assessment in China. We model and evaluate hourly vegetation carbon dioxide (CO2) exchange (mass per unit area per unit time) in northern China from 2005 to 2009. The model is driven by satellite and meteorological data, is linked to ground-level ecosystem observations, and is applicable to other time periods. We find vegetation uptake of CO2 in summer is comparable to emissions from fossil fuels in northern China.
Sophia Walther, Luis Guanter, Birgit Heim, Martin Jung, Gregory Duveiller, Aleksandra Wolanin, and Torsten Sachs
Biogeosciences, 15, 6221–6256, https://doi.org/10.5194/bg-15-6221-2018, https://doi.org/10.5194/bg-15-6221-2018, 2018
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We explored the timing of the peak of the short annual growing season in tundra ecosystems as indicated by an extensive suite of satellite indicators of vegetation productivity. Delayed peak greenness compared to peak photosynthesis is consistently found across years and land-cover classes. Plants also experience growth after optimal conditions for assimilation regarding light and temperature have passed. Our results have implications for the modelling of the circumpolar carbon balance.
Stefano Manzoni, Petr Čapek, Philipp Porada, Martin Thurner, Mattias Winterdahl, Christian Beer, Volker Brüchert, Jan Frouz, Anke M. Herrmann, Björn D. Lindahl, Steve W. Lyon, Hana Šantrůčková, Giulia Vico, and Danielle Way
Biogeosciences, 15, 5929–5949, https://doi.org/10.5194/bg-15-5929-2018, https://doi.org/10.5194/bg-15-5929-2018, 2018
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Carbon fixed by plants and phytoplankton through photosynthesis is ultimately stored in soils and sediments or released to the atmosphere during decomposition of dead biomass. Carbon-use efficiency is a useful metric to quantify the fate of carbon – higher efficiency means higher storage and lower release to the atmosphere. Here we summarize many definitions of carbon-use efficiency and study how this metric changes from organisms to ecosystems and from terrestrial to aquatic environments.
Gerardo Fratini, Simone Sabbatini, Kevin Ediger, Brad Riensche, George Burba, Giacomo Nicolini, Domenico Vitale, and Dario Papale
Biogeosciences, 15, 5473–5487, https://doi.org/10.5194/bg-15-5473-2018, https://doi.org/10.5194/bg-15-5473-2018, 2018
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Using a simulation study and field data, we quantify the biases that can be introduced in fluxes measured by eddy covariance (EC) if the raw high-frequency data are affected by random and systematic timing misalignments. Our study was motivated by the increasingly widespread adoption of fully digital EC systems potentially subject to such timing errors. We found biases as large as 10 %. We further propose a test to evaluate EC data logging systems for their time synchronization capabilities.
Cited articles
Assad, M., Parelle, J., Cazaux, D., Gimbert, F., Chalot, M., and Tatit-Froux,
F.: Mercury uptake into poplar leaves, Chemosphere, 146, 1–7,
https://doi.org/10.1016/j.chemosphere.2015.11.103, 2016.
Barghigiani, C., Ristori, T., and Bauleo, R.: Pinus as an atmospheric Hg
biomonitor, Environ. Technol., 12, 1175–1181, https://doi.org/10.1080/09593339109385118,
1991.
Bertolotti, G. and Gialanella, S.: Review: use of conifer needles as passive
samplers of inorganic pollutants in air quality monitoring, Anal. Methods,
6, 6208–6222, https://doi.org/10.1039/c4ay00172a, 2014.
Bishop, K., Shanley, J. B., Riscassi, A., de Wit, H. A., Eklöf, K.,
Meng, B., Mitchell, C., Osterwalder, S., Schuster, P. F., Webster, J., and
Zhu, W.: Recent advances in understanding and measurement of mercury in the
environment: Terrestrial Hg cycling, Sci. Total Environ., 721, 137647,
https://doi.org/10.1016/j.scitotenv.2020.137647, 2020.
Browne, C. L. and Fang, S. C.: Uptake of mercury vapor by wheat, Plant
Physiol., 61, 430–433, 1978.
De Temmerman, L., Waegeneers, N., Claeys, N., and Roeckens, E.: Comparison of
concentrations of mercury in ambient air to its accumulation by leafy
vegetables: An important step in terrestiral food chain analysis, Environ.
Pollut., 157, 1337–1341, https://doi.org/10.1016/j.envpol.2008.11.035, 2009.
Demers, J. D., Blum, J. D., and Zak, D. R.: Mercury isotopes in a forested
ecosystem: Implications for air-surface exchange dynamics and the global
mercury cycle, Global Biogeochem. Cycles, 27, 222–238,
https://doi.org/10.1002/gbc.20021, 2013.
Du, S. H. and Fang, S. C.: Catalase activity of C3 and C4 species and its
relationship to mercury vapour uptake, Environ. Exp. Bot., 23, 347–353,
1983.
Ericksen, J. A., Gustin, M. S., Schoran, D. E., Johnson, D. W., Lindberg, S.
E., and Coleman, J. S.: Accumulation of atmospheric mercury in forest
foliage, Atmos. Environ., 37, 1613–1622, https://doi.org/10.1016/S1352-2310(03)00008-6,
2003.
Feng, Z., Pang, J., Kobayashi, K., Zhu, J., and Ort, D.R.: Differential
responses in two varieties of winter wheat to elevated ozone concentration
under fully open-air field conditions, Glob. Change Biol. 17, 580-591, https://doi.org/10.1111/j.1365-2486.2010.02184.x, 2010.
Fleck, J. A., Grigal, D. F., and Nater, E. A.: Mercury uptake by trees: an
observational experiment, Water Air Soil Pollut., 115, 513–523,
https://doi.org/10.1023/A:1005194608598, 1999.
Fuhrer, J., Skärby, L., and Ashmore, M. R.: Critical levels for ozone
effect on vegetation in Europe, Environ. Pollut., 97, 91–106,
https://doi.org/10.1016/S0269-7491(97)00067-5, 1997.
Gelang, J., Pleijel, H., Sild, E., Danielsson, H., Younis, S., and Sellden,
G.: Rate and duration of grain filling in relation to flag leaf senescence
and grain yield in spring wheat (Triticum aestivum) exposed to different
concentrations of ozone, Physiol. Plant., 110, 366–375,
https://doi.org/10.1111/j.1399-3054.2000.1100311.x, 2000.
Graydon, J. A., St. Louis, V. L., Hintelmann, H., Lindberg, S. E.,
Sandilands, K. A., Rudd, J. W., Kelly, C. A., Hall, B. D., and Mowat, L. D.:
Long-term wet and dry deposition of total and methyl mercury in the remote
boreal ecoregion of Canada, Environ. Sci. Technol., 42, 8345–8351,
https://doi.org/10.1021/es801056j, 2008.
Grigal, D. F.: Inputs and outputs of mercury from terrestrial watersheds: a
review, Environ. Rev., 10, 1–39, https://doi.org/10.1139/A01-013, 2002.
Hanson, P. J., Lindberg, S. E., Tabberer, T. A., Owens, J. G., and Kim, K.
H.: Foliar exchange of mercury vapor: evidence for a compensation point,
Water Air Soil Pollut., 80, 373–382, https://doi.org/10.1007/BF01189687, 1995.
Hutnik, R. J., McClenahen, J. R., Long, R. P., and Davis, D. D.: Mercury
Accumulation in Pinus nigra (Austrian Pine), Northeast. Nat., 21, 529–540,
https://doi.org/10.1656/045.021.0402, 2014.
Jiskra, M., Sonke, J. E., Obrist, D., Bieser, J., Ebinghaus, R., Myhre, C.
L., Pfaffhuber, K. A., Wängberg, I., Kyllönen, K., Worthy, D.,
Martin, L. G., Labuschagne, C., Mkololo, T., Ramonet, M., Magand, O., and
Dommergue, A.: A vegetation control on seasonal variations in global
atmospheric mercury concentrations, Nat. Geosci., 11, 244–250,
https://doi.org/10.1038/s41561-018-0078-8, 2018.
Johansson, J., Watne, Å. K., Karlsson, P. E., Pihl Karlsson, G.,
Danielsson, H., Andersson, C., and Pleijel, H.: The European heat wave of
2018 and its promotion of the ozone climate penalty in southwest Sweden,
Boreal Env. Res., 25, 39–50, 2020.
Laacouri, A., Nater, E. A., and Kolka, R. K.: Distribution and uptake
dynamics of mercury in leaves of common deciduous tree species in Minnesota,
USA, Environ. Sci. Technol., 47, 10462–10470,
https://doi.org/10.1021/es401357z, 2013.
Larcher, W.: Physiological Plant Ecology, Ecophysiology and Stress
Physiology of Functional Groups, Springer, Berlin, Heidelberg, New York,
2003.
Li, R., Wu, H., Ding, J., Fu, W., Gan, L., and Li, Y.: Mercury pollution in
vegetables, grains and soils from areas surrounding coal-fired power plants,
Sci. Rep., 7, 46545, https://doi.org/10.1038/srep46545, 2017.
Lindberg, S., Bullock, R., Ebinghaus, R., Engstrom, D., Feng, X.,
Fitzgerald, W., Pirrone, N., Prestbo, E., and Seigneur, C.: A synthesis of
progress and uncertainties in attributing the sources of mercury in
deposition, Ambio, 36, 19–32, 2007.
Lodenius, M., Tulisalo, E., and Soltanpour-Gargari, A.: Exchange of mercury
between atmosphere and vegetation under contaminated conditions, Sci. Total
Environ., 304, 169–174, https://doi.org/10.1016/S0048-9697(02)00566-1,
2003.
Marschner, P. (Ed): Marschner's Mineral Nutrition of Higher
Plants, Third Edition, Elsevier, London, Waltham, San Diego, 2012.
Millhollen, A. G., Gustin, M. S., and Obrist, D.: Foliar mercury accumulation
and exchange for three tree species, Environ. Sci. Technol., 40, 6001–6006,
https://doi.org/10.1021/es0609194, 2006.
Mulholland, B. J., Craigon, J., Black, C. R., Colls, J., Atherton, J., and
Landon, G.: Impact of elevated atmospheric CO2 and O3 on gas
exchange and chlorophyll content in spring wheat (Triticum aestivum L.), J.
Exp. Bot., 48, 1853–1863, https://doi.org/10.1093/jxb/48.10.1853, 1997.
Mulholland, B. J., Craigon, J., Black, C. R., Colls, J., Atherton, J., and
Landon, G.: Growth, light interception and yield responses of spring wheat
(Triticum aestivum L.) grown under elevated CO2 and O3 in open-top
chambers, Glob. Change Biol. 4, 121–130,
https://doi.org/10.1046/j.1365-2486.1998.00112.x, 1998.
Muukkonen, P.: Needle biomass turnover rates of Scots pine (Pinus sylvestris
L.) derived from the needle-shed dynamics, Trees, 19, 273–279,
https://doi.org/10.1007/s00468-004-0381-4, 2005.
Munthe, J., Hultberg, H., and Iverfeldt, Å.: Mechanisms of deposition of
methylmercury and mercury to coniferous forests, Water Air Soil Pollut., 80,
363–371, https://doi.org/10.1007/BF01189686, 1995.
Navrátil, T., Nováková. T., Roll, M., Shanley, J. B.,
Koáček, J., Kaňa, J., and Cudlín, P.: Decreasing litterfall
mercury deposition in central European coniferous forests and effects of
bark beetle infestation, Sci. Total Environ., 682, 213–225,
https://doi.org/10.1016/j.scitotenv.2019.05.093, 2019.
Nebel, B. and Matile, P.: Longevity and senescence of needles in Pinus
cembra L, Trees, 6, 156–161, https://doi.org/10.1007/BF00202431, 1992.
Niu, Z., Zhang, X., Wang, Z., and Ci, Z.: Field controlled experiments of
mercury accumulation in crops from air and soil, Environ. Pollut., 159,
2684–2689, https://doi.org/10.1016/j.envpol.2011.05.029, 2011.
Nyirambangutse, B., Zibera, E., Uwizeye, F. K., Nsabimana, D., Bizuru, E., Pleijel, H., Uddling, J., and Wallin, G.: Carbon stocks and dynamics at different successional stages in an Afromontane tropical forest, Biogeosciences, 14, 1285–1303, https://doi.org/10.5194/bg-14-1285-2017, 2017.
Obrist, D.: Atmospheric mercury pollution due to losses of terrestrial
carbon pools?, Biogeochemistry, 85, 119–123, https://doi.org/10.1007/s10533-007-9108-0,
2007.
Obrist, D., Kirk, J. L., Zhang, L., Sunderland, E. M., Jiskra, M., and Selin,
N. E.: A review of global environmental mercury processes in response to
human and natural perturbations: Changes of emission, climate, and land use,
Ambio, 47, 116–140, https://doi.org/10.1007/s13280-017-1004-9, 2018.
Osborne, S., Mills, G., Hayes, F., Harmens, H., Gillies, D., Büker, P.,
and Emberson, L.: New insights into leaf physiological responses to ozone
for use in crop modelling, Plants, 8, 84, https://doi.org/10.3390/plants8040084, 2019.
Pleijel, H., Klingberg, J., Nerentorp, M., Broberg, M., Nyirambangutse, B., Munthe, J., and Wallin, G.: Mercury accumulation in leaves of different plant types – the significance of tissue age and specific leaf area, Dryad, [data set], https://doi.org/10.5061/dryad.7wm37pvsq, 2021.
Pokharel, A. K. and Obrist, D.: Fate of mercury in tree litter during decomposition, Biogeosciences, 8, 2507–2521, https://doi.org/10.5194/bg-8-2507-2011, 2011.
Poorter, H., Niinemets, Ü., Poorter, L., Wright, I. J., and Villar, R.: Causes
and consequences of variation in leaf mass per area (LMA): a meta-analysis,
New Phytol., 182, 565–588, https://doi.org/10.1111/j.1469-8137.2009.02830.x, 2009.
Rasmussen, P. E.: Temporal variation of mercury in vegetation, Water Air
Soil Pollut., 80, 1039–1042, https://doi.org/10.1007/BF01189762, 1995.
Rasmussen, P. E., Mierle, G., and Nriagu, J. O.: The analysis of vegetation
for total mercury, Water Air Soil Pollut., 56, 379–390,
https://doi.org/10.1007/BF00342285, 1991.
Reich, P. B., Uhl, C., Waiters, M. B., and Ellsworth, D. S.: Leaf lifespan as
a determinant of leaf structure and function among 23 Amazonian tree
species, Oecologia, 86, 16–24, https://doi.org/10.1007/BF00317383, 1991.
Reich, P. B., Koike, T., Gower, S. T., and Schoettle, A. W.: Causes and
consequences of variation in conifer leaf life-span, in: Ecophysiology of
coniferous forests, edited by: Smith, W. K. and Hinkley, T. M., Academic
press, San Diego, USA, 1995.
Reich, P. B., Oleksyn, J., Modrzynski, J., and Tjoelker, M.: Evidence that
longer needle retention of spruce and pine populations at high elevations
and high latitudes is largely a phenotypic response, Tree Physiol., 16,
643—647, https://doi.org/10.1093/treephys/16.7.643, 1996.
Risch, M. R., DeWild, J. F., Gay, D. A., Zhang, L., Boyer, E. W., and
Krabbenhoft, D. P.: 747 Atmospheric mercury deposition to forests in the
eastern USA, Environ. Pollut., 228, 8–18, https://doi.org/10.1016/j.envpol.2017.05.004,
2017.
Sommar, J., Zhu, W., Shang, L., Lin, C.-J., and Feng, X.: Seasonal variations in metallic mercury (Hg0) vapor exchange over biannual wheat–corn rotation cropland in the North China Plain, Biogeosciences, 13, 2029–2049, https://doi.org/10.5194/bg-13-2029-2016, 2016.
Sommar, J., Osterwalder, S., and Zhu, W.: Recent advances in understanding and
measurement of Hg in the environment: Surface-atmosphere exchange of gaseous
elemental mercury (Hg0), Sci. Total Environ., 721, 137648,
https://doi.org/10.1016/j.scitotenv.2020.137648, 2020.
Sprovieri, F., Pirrone, N., Bencardino, M., D'Amore, F., Angot, H., Barbante, C., Brunke, E.-G., Arcega-Cabrera, F., Cairns, W., Comero, S., Diéguez, M. D. C., Dommergue, A., Ebinghaus, R., Feng, X. B., Fu, X., Garcia, P. E., Gawlik, B. M., Hageström, U., Hansson, K., Horvat, M., Kotnik, J., Labuschagne, C., Magand, O., Martin, L., Mashyanov, N., Mkololo, T., Munthe, J., Obolkin, V., Ramirez Islas, M., Sena, F., Somerset, V., Spandow, P., Vardè, M., Walters, C., Wängberg, I., Weigelt, A., Yang, X., and Zhang, H.: Five-year records of mercury wet deposition flux at GMOS sites in the Northern and Southern hemispheres, Atmos. Chem. Phys., 17, 2689–2708, https://doi.org/10.5194/acp-17-2689-2017, 2017.
Stamenkovic, J. and Gustin, M. S.: Nonstomatal versus Stomatal Uptake of
Atmospheric Mercury, Environ. Sci. Technol., 43, 1367–1372,
https://doi.org/10.1021/es801583a, 2009.
St. Louis, V. L., Rudd, J. W. M., Kelly, C. A., Hall, B. D., Rolfhus, K. R.,
Scott, K. J., Lindberg, S. E., and Dong, W.: Importance of the forest canopy
to fluxes of methyl mercury and total mercury to boreal ecosystems, Environ.
Sci. Technol., 35, 3089–3098, https://doi.org/10.1021/es001924p, 2001.
Sun, G., Feng, X., Yin, R., Zhao, H., Zhang, L., Sommar, J., Li, Z., and Zhang,
H.: Corn (Zea mays L.): A low methylmercury staple cereal source and an
important biospheric sink of atmospheric mercury, and health risk
assessment, Environ. Int., 131, 104971, https://doi.org/10.1016/j.envint.2019.104971,
2019.
UN Environment: Global Mercury Assessment Report 2018, UN Environmental
Programme, Chemicals and Health Branch Geneva, Switzerland, ISBN 978-92-807-3744-8, 2019.
Wang, X., Bao, Z., Lin, C.-J., Yuan, W., and Feng, X.: Assessment of global
mercury deposition through litterfall, Environ. Sci. Technol., 50,
8548–8557, https://doi.org/10.1021/acs.est.5b06351, 2016.
Wohlgemuth, L., Osterwalder, S., Joseph, C., Kahmen, A., Hoch, G., Alewell, C., and Jiskra, M.: A bottom-up quantification of foliar mercury uptake fluxes across Europe, Biogeosciences, 17, 6441–6456, https://doi.org/10.5194/bg-17-6441-2020, 2020.
Wyttenbach, A. and Tobler, L.: The seasonal variation of 20 elements in
1st and 2nd year needles of Norway spruce, Picea abies (L.) Karst,
Trees, 2, 52–64, https://doi.org/10.1007/BF01196345, 1988.
Wyttenbach, A. and Tobler, L.: The concentrations of Fe, Zn and Co in
successive needle age classes of Norway spruce [Picea abies (L.) Karst.],
Trees, 14, 198–205, https://doi.org/10.1007/PL00009763, 2000.
Yuan, W., Sommar, J., Lin, C. J., Wang, X., Li, K., Liu, Y., Zhang, H., Lu,
Z., Wu, C., and Feng, X.: Stable isotope evidence shows re-emission of
elemental mercury vapour occurring after reductive loss from foliage,
Environ. Sci. Technol., 53, 651-660, https://doi.org/10.1021/acs.est.8b04865, 2019.
Zhou, J., Obrist, D., Dastoor, A., Jiskra, M., and Ryjkov, A.: Vegetation
uptake of mercury and impacts on global cycling. Nat. Rev. Earth Environ. 2,
269–284, https://doi.org/10.1038/s43017-021-00146-y, 2021.
Short summary
Mercury is a problematic metal in the environment. It is crucial to understand the Hg circulation in ecosystems. We explored the mercury concentration in foliage from a diverse set of plants, locations and sampling periods to study the accumulation of Hg in leaves–needles over time. Mercury was always higher in older tissue: in broadleaved trees, conifers and wheat. Specific leaf area, the leaf area per unit leaf mass, turned out to be critical for Hg accumulation in leaves–needles.
Mercury is a problematic metal in the environment. It is crucial to understand the Hg...
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