Articles | Volume 19, issue 6
https://doi.org/10.5194/bg-19-1611-2022
© 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-19-1611-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Mar 2022
Research article |
| 21 Mar 2022
| 21 Mar 2022
Grazing enhances carbon cycling but reduces methane emission during peak growing season in the Siberian Pleistocene Park tundra site
Wolfgang Fischer
Micrometeorology Group, University of Bayreuth, Bayreuth, Germany
Christoph K. Thomas
Micrometeorology Group, University of Bayreuth, Bayreuth, Germany
Bayreuth Center of Ecology and Environmental Research, BayCEER, Bayreuth, Germany
Nikita Zimov
Northeast Science Station, Pacific Institute for Geography, Far Eastern Branch of the Russian Academy of Science,
Chersky, Sakha Republic (Yakutia), Russia
Department of Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany
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Kseniia Ivanova, Anna-Maria Virkkala, Victor Brovkin, Tobias Stacke, Barbara Widhalm, Annett Bartsch, Carolina Voigt, Oliver Sonnentag, and Mathias Göckede
EGUsphere, https://doi.org/10.5194/egusphere-2025-3968, https://doi.org/10.5194/egusphere-2025-3968, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
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We measured over 13,000 methane fluxes at a site in the Canadian Arctic and linked them with drone and free satellite images. We tested four machine-learning methods and two map scales. Metre-scale maps captured small wet and dry features that strongly affect methane release, while coarser maps blurred them. Different models shifted the monthly methane estimate. This helps choose the right data and tools to map methane, design monitoring networks, and check climate models.
Theresia Yazbeck, Mark Schlutow, Abdullah Bolek, Nathalie Ylenia Triches, Elias Wahl, Martin Heimann, and Mathias Göckede
EGUsphere, https://doi.org/10.5194/egusphere-2025-3791, https://doi.org/10.5194/egusphere-2025-3791, 2025
This preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).
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Natural ecosystems are composed of heterogeneous landscapes challenging CO₂ fluxes quantification per landcover type. Here, we combine UAV measurements of CO₂ gas concentrations with a Large-Eddy simulation model in a submeso scale inversion to separate fluxes by landcover type, demonstrating a promising approach to capture and upscale flux heterogeneity within eddy-covariance footprints.
Nathalie Ylenia Triches, Jan Engel, Abdullah Bolek, Timo Vesala, Maija E. Marushchak, Anna-Maria Virkkala, Martin Heimann, and Mathias Göckede
Atmos. Meas. Tech., 18, 3407–3424, https://doi.org/10.5194/amt-18-3407-2025, https://doi.org/10.5194/amt-18-3407-2025, 2025
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This study explores nitrous oxide (N2O) fluxes from a nutrient-poor sub-Arctic peatland. N2O is a potent greenhouse gas; understanding its fluxes is essential for addressing global warming. Using a new instrument and flux chambers, we introduce a system to reliably detect low N2O fluxes and provide recommendations on chamber closure times and flux calculation methods to better quantify N2O fluxes. We encourage researchers to further investigate N2O fluxes in low-nutrient environments.
Mohammad Abdoli, Reza Pirkhoshghiyafeh, and Christoph K. Thomas
EGUsphere, https://doi.org/10.5194/egusphere-2025-2328, https://doi.org/10.5194/egusphere-2025-2328, 2025
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We used computer simulations to improve how fiber-optic cables measure wind direction. These heated cables have small cones attached to sense how air moves around them. We found that hollow cone designs detect airflow more accurately than earlier versions. This helps us better understand air movement near the ground and could improve the physical foundations of weather and climate models.
Judith Vogt, Martijn M. T. A. Pallandt, Luana S. Basso, Abdullah Bolek, Kseniia Ivanova, Mark Schlutow, Gerardo Celis, McKenzie Kuhn, Marguerite Mauritz, Edward A. G. Schuur, Kyle Arndt, Anna-Maria Virkkala, Isabel Wargowsky, and Mathias Göckede
Earth Syst. Sci. Data, 17, 2553–2573, https://doi.org/10.5194/essd-17-2553-2025, https://doi.org/10.5194/essd-17-2553-2025, 2025
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We present a meta-dataset of greenhouse gas observations in the Arctic and boreal regions, including information on sites where greenhouse gases have been measured using different measurement techniques. We provide a novel repository of metadata to facilitate synthesis efforts for regions undergoing rapid environmental change. The meta-dataset shows where measurements are missing and will be updated as new measurements are published.
Qing Ying, Benjamin Poulter, Jennifer D. Watts, Kyle A. Arndt, Anna-Maria Virkkala, Lori Bruhwiler, Youmi Oh, Brendan M. Rogers, Susan M. Natali, Hilary Sullivan, Amanda Armstrong, Eric J. Ward, Luke D. Schiferl, Clayton D. Elder, Olli Peltola, Annett Bartsch, Ankur R. Desai, Eugénie Euskirchen, Mathias Göckede, Bernhard Lehner, Mats B. Nilsson, Matthias Peichl, Oliver Sonnentag, Eeva-Stiina Tuittila, Torsten Sachs, Aram Kalhori, Masahito Ueyama, and Zhen Zhang
Earth Syst. Sci. Data, 17, 2507–2534, https://doi.org/10.5194/essd-17-2507-2025, https://doi.org/10.5194/essd-17-2507-2025, 2025
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We present daily methane (CH4) fluxes of northern wetlands at 10 km resolution during 2016–2022 (WetCH4) derived from a novel machine learning framework. We estimated an average annual CH4 emission of 22.8 ± 2.4 Tg CH4 yr−1 (15.7–51.6 Tg CH4 yr−1). Emissions were intensified in 2016, 2020, and 2022, with the largest interannual variation coming from Western Siberia. Continued, all-season tower observations and improved soil moisture products are needed for future improvement of CH4 upscaling.
Martijn Pallandt, Abhishek Chatterjee, Lesley Ott, Julia Marshall, and Mathias Göckede
EGUsphere, https://doi.org/10.5194/egusphere-2025-604, https://doi.org/10.5194/egusphere-2025-604, 2025
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Climate change is greatly affecting the Arctic. Among these changes is the thawing of permanently frozen soil, which may increase the release of methane, a powerful greenhouse gas (GHG). In this study we investigated the capabilities of tall GHG measuring towers and two satellite systems to detect this methane release. We find that these systems have different strengths and weaknesses, and that individually they struggle to detect these changes, though combined they might cover their weak spots.
Mark Schlutow, Ray Chew, and Mathias Göckede
EGUsphere, https://doi.org/10.5194/egusphere-2025-2415, https://doi.org/10.5194/egusphere-2025-2415, 2025
This preprint is open for discussion and under review for Geoscientific Model Development (GMD).
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Understanding how greenhouse gases and pollutants move through the atmosphere is crucial. A new model, the Boundary Layer Dispersion and Footprint Model (BLDFM), tracks their movement. Unlike previous models, BLDFM uses a numerical approach without simplifying assumptions. It's flexible and can be used for climate impact studies and industrial emissions monitoring. Our testing and comparison results show BLDFM's potential as a valuable research tool.
Afshan Khaleghi, Mathias Göckede, Nicholas Nickerson, and David Risk
EGUsphere, https://doi.org/10.5194/egusphere-2025-644, https://doi.org/10.5194/egusphere-2025-644, 2025
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Methane is a key greenhouse gas, and identifying its sources is crucial for reducing emissions. This study enhances methane detection at oil and gas sites by combining sensor data with advanced modeling tools. Tests in real-world and simulated conditions showed high accuracy, particularly in favorable atmospheric conditions. These findings improve methane monitoring and support better emission detection in Continuous Emission Monitoring systems.
Barbara Widhalm, Annett Bartsch, Tazio Strozzi, Nina Jones, Artem Khomutov, Elena Babkina, Marina Leibman, Rustam Khairullin, Mathias Göckede, Helena Bergstedt, Clemens von Baeckmann, and Xaver Muri
The Cryosphere, 19, 1103–1133, https://doi.org/10.5194/tc-19-1103-2025, https://doi.org/10.5194/tc-19-1103-2025, 2025
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Mapping soil moisture in Arctic permafrost regions is crucial for various activities, but it is challenging with typical satellite methods due to the landscape's diversity. Seasonal freezing and thawing cause the ground to periodically rise and subside. Our research demonstrates that this seasonal ground settlement, measured with Sentinel-1 satellite data, is larger in areas with wetter soils. This method helps to monitor permafrost degradation.
Jacob A. Nelson, Sophia Walther, Fabian Gans, Basil Kraft, Ulrich Weber, Kimberly Novick, Nina Buchmann, Mirco Migliavacca, Georg Wohlfahrt, Ladislav Šigut, Andreas Ibrom, Dario Papale, Mathias Göckede, Gregory Duveiller, Alexander Knohl, Lukas Hörtnagl, Russell L. Scott, Jiří Dušek, Weijie Zhang, Zayd Mahmoud Hamdi, Markus Reichstein, Sergio Aranda-Barranco, Jonas Ardö, Maarten Op de Beeck, Dave Billesbach, David Bowling, Rosvel Bracho, Christian Brümmer, Gustau Camps-Valls, Shiping Chen, Jamie Rose Cleverly, Ankur Desai, Gang Dong, Tarek S. El-Madany, Eugenie Susanne Euskirchen, Iris Feigenwinter, Marta Galvagno, Giacomo A. Gerosa, Bert Gielen, Ignacio Goded, Sarah Goslee, Christopher Michael Gough, Bernard Heinesch, Kazuhito Ichii, Marcin Antoni Jackowicz-Korczynski, Anne Klosterhalfen, Sara Knox, Hideki Kobayashi, Kukka-Maaria Kohonen, Mika Korkiakoski, Ivan Mammarella, Mana Gharun, Riccardo Marzuoli, Roser Matamala, Stefan Metzger, Leonardo Montagnani, Giacomo Nicolini, Thomas O'Halloran, Jean-Marc Ourcival, Matthias Peichl, Elise Pendall, Borja Ruiz Reverter, Marilyn Roland, Simone Sabbatini, Torsten Sachs, Marius Schmidt, Christopher R. Schwalm, Ankit Shekhar, Richard Silberstein, Maria Lucia Silveira, Donatella Spano, Torbern Tagesson, Gianluca Tramontana, Carlo Trotta, Fabio Turco, Timo Vesala, Caroline Vincke, Domenico Vitale, Enrique R. Vivoni, Yi Wang, William Woodgate, Enrico A. Yepez, Junhui Zhang, Donatella Zona, and Martin Jung
Biogeosciences, 21, 5079–5115, https://doi.org/10.5194/bg-21-5079-2024, https://doi.org/10.5194/bg-21-5079-2024, 2024
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The movement of water, carbon, and energy from the Earth's surface to the atmosphere, or flux, is an important process to understand because it impacts our lives. Here, we outline a method called FLUXCOM-X to estimate global water and CO2 fluxes based on direct measurements from sites around the world. We go on to demonstrate how these new estimates of net CO2 uptake/loss, gross CO2 uptake, total water evaporation, and transpiration from plants compare to previous and independent estimates.
Andrew W. Seidl, Aina Johannessen, Alena Dekhtyareva, Jannis M. Huss, Marius O. Jonassen, Alexander Schulz, Ove Hermansen, Christoph K. Thomas, and Harald Sodemann
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2024-293, https://doi.org/10.5194/essd-2024-293, 2024
Revised manuscript under review for ESSD
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ISLAS2020 set out to measure the stable water isotopic composition of Arctic moisture. By not only measuring at different sites around Ny-Ålesund, Svalbard, but also measuring at variable heights above surface level, we aim to characterize processes that produce or modify the isotopic composition. We also collect precipitation samples from sites that were typically downstream of Ny-Ålesund, so as to capture the isotopic composition during removal from the atmospheric water cycle.
Abdullah Bolek, Martin Heimann, and Mathias Göckede
Atmos. Meas. Tech., 17, 5619–5636, https://doi.org/10.5194/amt-17-5619-2024, https://doi.org/10.5194/amt-17-5619-2024, 2024
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This study describes the development of a new UAV platform to measure atmospheric greenhouse gas (GHG) mole fractions, 2D wind speed, air temperature, humidity, and pressure. Understanding GHG flux processes and controls across various ecosystems is essential for estimating the current and future state of climate change. It was shown that using the UAV platform for such measurements is beneficial for improving our understanding of GHG processes over complex landscapes.
Eike Maximilian Esders, Christoph Georgi, Wolfgang Babel, Andreas Held, and Christoph Karl Thomas
Aerosol Research, 2, 235–243, https://doi.org/10.5194/ar-2-235-2024, https://doi.org/10.5194/ar-2-235-2024, 2024
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Our study explores how tiny plastic particles, known as microplastics (MPs), move through the air. We focus on their journey in a wind tunnel to mimic atmospheric transport. Depending on the air speed and the height of their release, they move downwards or upwards. These results suggest that MPs behave like mineral particles and that we can expect MPs to accumulate where natural dust also accumulates in the environment, offering insights for predicting the spread and impacts of MPs.
Sandra Raab, Karel Castro-Morales, Anke Hildebrandt, Martin Heimann, Jorien Elisabeth Vonk, Nikita Zimov, and Mathias Goeckede
Biogeosciences, 21, 2571–2597, https://doi.org/10.5194/bg-21-2571-2024, https://doi.org/10.5194/bg-21-2571-2024, 2024
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Water status is an important control factor on sustainability of Arctic permafrost soils, including production and transport of carbon. We compared a drained permafrost ecosystem with a natural control area, investigating water levels, thaw depths, and lateral water flows. We found that shifts in water levels following drainage affected soil water availability and that lateral transport patterns were of major relevance. Understanding these shifts is crucial for future carbon budget studies.
Kirsi H. Keskitalo, Lisa Bröder, Tommaso Tesi, Paul J. Mann, Dirk J. Jong, Sergio Bulte Garcia, Anna Davydova, Sergei Davydov, Nikita Zimov, Negar Haghipour, Timothy I. Eglinton, and Jorien E. Vonk
Biogeosciences, 21, 357–379, https://doi.org/10.5194/bg-21-357-2024, https://doi.org/10.5194/bg-21-357-2024, 2024
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Permafrost thaw releases organic carbon into waterways. Decomposition of this carbon pool emits greenhouse gases into the atmosphere, enhancing climate warming. We show that Arctic river carbon and water chemistry are different between the spring ice breakup and summer and that primary production is initiated in small Arctic rivers right after ice breakup, in contrast to in large rivers. This may have implications for fluvial carbon dynamics and greenhouse gas uptake and emission balance.
Julius Seidler, Markus N. Friedrich, Christoph K. Thomas, and Anke C. Nölscher
Atmos. Chem. Phys., 24, 137–153, https://doi.org/10.5194/acp-24-137-2024, https://doi.org/10.5194/acp-24-137-2024, 2024
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Here, we study the transport of ultrafine particles (UFPs) from an airport to two new adjacent measuring sites for 1 year. The number of UFPs in the air and the diurnal variation are typical urban. Winds from the airport show increased number concentrations. Additionally, considering wind frequencies, we estimate that, from all UFPs measured at the two sites, 10 %–14 % originate from the airport and/or other UFP sources from between the airport and site.
Eike Maximilian Esders, Sebastian Sittl, Inka Krammel, Wolfgang Babel, Georg Papastavrou, and Christoph Karl Thomas
Atmos. Chem. Phys., 23, 15835–15851, https://doi.org/10.5194/acp-23-15835-2023, https://doi.org/10.5194/acp-23-15835-2023, 2023
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Do microplastics behave differently from mineral particles when they are exposed to wind? We observed plastic and mineral particles in a wind tunnel and measured at what wind speeds the particles start to move. The results indicate that microplastics start to move at smaller wind speeds as they weigh less and are less sticky. Hence, we think that microplastics also move more easily in the environment.
Peter Stimmler, Mathias Goeckede, Bo Elberling, Susan Natali, Peter Kuhry, Nia Perron, Fabrice Lacroix, Gustaf Hugelius, Oliver Sonnentag, Jens Strauss, Christina Minions, Michael Sommer, and Jörg Schaller
Earth Syst. Sci. Data, 15, 1059–1075, https://doi.org/10.5194/essd-15-1059-2023, https://doi.org/10.5194/essd-15-1059-2023, 2023
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Arctic soils store large amounts of carbon and nutrients. The availability of nutrients, such as silicon, calcium, iron, aluminum, phosphorus, and amorphous silica, is crucial to understand future carbon fluxes in the Arctic. Here, we provide, for the first time, a unique dataset of the availability of the abovementioned nutrients for the different soil layers, including the currently frozen permafrost layer. We relate these data to several geographical and geological parameters.
Mohammad Abdoli, Karl Lapo, Johann Schneider, Johannes Olesch, and Christoph K. Thomas
Atmos. Meas. Tech., 16, 809–824, https://doi.org/10.5194/amt-16-809-2023, https://doi.org/10.5194/amt-16-809-2023, 2023
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In this study, we compute the distributed sensible heat flux using a distributed temperature sensing technique, whose magnitude, sign, and temporal dynamics compare reasonably well to estimates from classical eddy covariance measurements from sonic anemometry. Despite the remaining uncertainty in computed fluxes, the results demonstrate the potential of the novel method to compute spatially resolving sensible heat flux measurement and encourage further research.
Dirk Jong, Lisa Bröder, Tommaso Tesi, Kirsi H. Keskitalo, Nikita Zimov, Anna Davydova, Philip Pika, Negar Haghipour, Timothy I. Eglinton, and Jorien E. Vonk
Biogeosciences, 20, 271–294, https://doi.org/10.5194/bg-20-271-2023, https://doi.org/10.5194/bg-20-271-2023, 2023
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With this study, we want to highlight the importance of studying both land and ocean together, and water and sediment together, as these systems function as a continuum, and determine how organic carbon derived from permafrost is broken down and its effect on global warming. Although on the one hand it appears that organic carbon is removed from sediments along the pathway of transport from river to ocean, it also appears to remain relatively ‘fresh’, despite this removal and its very old age.
Karel Castro-Morales, Anna Canning, Sophie Arzberger, Will A. Overholt, Kirsten Küsel, Olaf Kolle, Mathias Göckede, Nikita Zimov, and Arne Körtzinger
Biogeosciences, 19, 5059–5077, https://doi.org/10.5194/bg-19-5059-2022, https://doi.org/10.5194/bg-19-5059-2022, 2022
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Permafrost thaw releases methane that can be emitted into the atmosphere or transported by Arctic rivers. Methane measurements are lacking in large Arctic river regions. In the Kolyma River (northeast Siberia), we measured dissolved methane to map its distribution with great spatial detail. The river’s edge and river junctions had the highest methane concentrations compared to other river areas. Microbial communities in the river showed that the river’s methane likely is from the adjacent land.
Matthias Fuchs, Juri Palmtag, Bennet Juhls, Pier Paul Overduin, Guido Grosse, Ahmed Abdelwahab, Michael Bedington, Tina Sanders, Olga Ogneva, Irina V. Fedorova, Nikita S. Zimov, Paul J. Mann, and Jens Strauss
Earth Syst. Sci. Data, 14, 2279–2301, https://doi.org/10.5194/essd-14-2279-2022, https://doi.org/10.5194/essd-14-2279-2022, 2022
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We created digital, high-resolution bathymetry data sets for the Lena Delta and Kolyma Gulf regions in northeastern Siberia. Based on nautical charts, we digitized depth points and isobath lines, which serve as an input for a 50 m bathymetry model. The benefit of this data set is the accurate mapping of near-shore areas as well as the offshore continuation of the main deep river channels. This will improve the estimation of river outflow and the nutrient flux output into the coastal zone.
Karl Lapo, Anita Freundorfer, Antonia Fritz, Johann Schneider, Johannes Olesch, Wolfgang Babel, and Christoph K. Thomas
Earth Syst. Sci. Data, 14, 885–906, https://doi.org/10.5194/essd-14-885-2022, https://doi.org/10.5194/essd-14-885-2022, 2022
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The layer of air near the surface is poorly understood during conditions with weak winds. Further, it is even difficult to observe. In this experiment we used distributed temperature sensing to observe air temperature and wind speed at thousands of points simultaneously every couple of seconds. This incredibly rich data set can be used to examine and understand what drives the mixing between the atmosphere and surface during these weak-wind periods.
Martijn M. T. A. Pallandt, Jitendra Kumar, Marguerite Mauritz, Edward A. G. Schuur, Anna-Maria Virkkala, Gerardo Celis, Forrest M. Hoffman, and Mathias Göckede
Biogeosciences, 19, 559–583, https://doi.org/10.5194/bg-19-559-2022, https://doi.org/10.5194/bg-19-559-2022, 2022
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Thawing of Arctic permafrost soils could trigger the release of vast amounts of carbon to the atmosphere, thus enhancing climate change. Our study investigated how well the current network of eddy covariance sites to monitor greenhouse gas exchange at local scales captures pan-Arctic flux patterns. We identified large coverage gaps, e.g., in Siberia, but also demonstrated that a targeted addition of relatively few sites can significantly improve network performance.
Anna-Maria Virkkala, Susan M. Natali, Brendan M. Rogers, Jennifer D. Watts, Kathleen Savage, Sara June Connon, Marguerite Mauritz, Edward A. G. Schuur, Darcy Peter, Christina Minions, Julia Nojeim, Roisin Commane, Craig A. Emmerton, Mathias Goeckede, Manuel Helbig, David Holl, Hiroki Iwata, Hideki Kobayashi, Pasi Kolari, Efrén López-Blanco, Maija E. Marushchak, Mikhail Mastepanov, Lutz Merbold, Frans-Jan W. Parmentier, Matthias Peichl, Torsten Sachs, Oliver Sonnentag, Masahito Ueyama, Carolina Voigt, Mika Aurela, Julia Boike, Gerardo Celis, Namyi Chae, Torben R. Christensen, M. Syndonia Bret-Harte, Sigrid Dengel, Han Dolman, Colin W. Edgar, Bo Elberling, Eugenie Euskirchen, Achim Grelle, Juha Hatakka, Elyn Humphreys, Järvi Järveoja, Ayumi Kotani, Lars Kutzbach, Tuomas Laurila, Annalea Lohila, Ivan Mammarella, Yojiro Matsuura, Gesa Meyer, Mats B. Nilsson, Steven F. Oberbauer, Sang-Jong Park, Roman Petrov, Anatoly S. Prokushkin, Christopher Schulze, Vincent L. St. Louis, Eeva-Stiina Tuittila, Juha-Pekka Tuovinen, William Quinton, Andrej Varlagin, Donatella Zona, and Viacheslav I. Zyryanov
Earth Syst. Sci. Data, 14, 179–208, https://doi.org/10.5194/essd-14-179-2022, https://doi.org/10.5194/essd-14-179-2022, 2022
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The effects of climate warming on carbon cycling across the Arctic–boreal zone (ABZ) remain poorly understood due to the relatively limited distribution of ABZ flux sites. Fortunately, this flux network is constantly increasing, but new measurements are published in various platforms, making it challenging to understand the ABZ carbon cycle as a whole. Here, we compiled a new database of Arctic–boreal CO2 fluxes to help facilitate large-scale assessments of the ABZ carbon cycle.
Teresa Vogl, Amy Hrdina, and Christoph K. Thomas
Biogeosciences, 18, 5097–5115, https://doi.org/10.5194/bg-18-5097-2021, https://doi.org/10.5194/bg-18-5097-2021, 2021
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The relaxed eddy accumulation technique is a method used for measuring fluxes of chemical species in the atmosphere. It relies on a proportionality factor, β, which can be determined using different methods. Also, different techniques for sampling can be used by only drawing air into the measurement system when vertical wind velocity exceeds a certain threshold. We compare different ways to obtain β and different threshold techniques to direct flux measurements for three different sites.
Torben Windirsch, Guido Grosse, Mathias Ulrich, Bruce C. Forbes, Mathias Göckede, Juliane Wolter, Marc Macias-Fauria, Johan Olofsson, Nikita Zimov, and Jens Strauss
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-227, https://doi.org/10.5194/bg-2021-227, 2021
Revised manuscript not accepted
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With global warming, permafrost thaw and associated carbon release are of increasing importance. We examined how large herbivorous animals affect Arctic landscapes and how they might contribute to reduction of these emissions. We show that over a short timespan of roughly 25 years, these animals have already changed the vegetation and landscape. On pastures in a permafrost area in Siberia we found smaller thaw depth and higher carbon content than in surrounding non-pasture areas.
Kyle B. Delwiche, Sara Helen Knox, Avni Malhotra, Etienne Fluet-Chouinard, Gavin McNicol, Sarah Feron, Zutao Ouyang, Dario Papale, Carlo Trotta, Eleonora Canfora, You-Wei Cheah, Danielle Christianson, Ma. Carmelita R. Alberto, Pavel Alekseychik, Mika Aurela, Dennis Baldocchi, Sheel Bansal, David P. Billesbach, Gil Bohrer, Rosvel Bracho, Nina Buchmann, David I. Campbell, Gerardo Celis, Jiquan Chen, Weinan Chen, Housen Chu, Higo J. Dalmagro, Sigrid Dengel, Ankur R. Desai, Matteo Detto, Han Dolman, Elke Eichelmann, Eugenie Euskirchen, Daniela Famulari, Kathrin Fuchs, Mathias Goeckede, Sébastien Gogo, Mangaliso J. Gondwe, Jordan P. Goodrich, Pia Gottschalk, Scott L. Graham, Martin Heimann, Manuel Helbig, Carole Helfter, Kyle S. Hemes, Takashi Hirano, David Hollinger, Lukas Hörtnagl, Hiroki Iwata, Adrien Jacotot, Gerald Jurasinski, Minseok Kang, Kuno Kasak, John King, Janina Klatt, Franziska Koebsch, Ken W. Krauss, Derrick Y. F. Lai, Annalea Lohila, Ivan Mammarella, Luca Belelli Marchesini, Giovanni Manca, Jaclyn Hatala Matthes, Trofim Maximov, Lutz Merbold, Bhaskar Mitra, Timothy H. Morin, Eiko Nemitz, Mats B. Nilsson, Shuli Niu, Walter C. Oechel, Patricia Y. Oikawa, Keisuke Ono, Matthias Peichl, Olli Peltola, Michele L. Reba, Andrew D. Richardson, William Riley, Benjamin R. K. Runkle, Youngryel Ryu, Torsten Sachs, Ayaka Sakabe, Camilo Rey Sanchez, Edward A. Schuur, Karina V. R. Schäfer, Oliver Sonnentag, Jed P. Sparks, Ellen Stuart-Haëntjens, Cove Sturtevant, Ryan C. Sullivan, Daphne J. Szutu, Jonathan E. Thom, Margaret S. Torn, Eeva-Stiina Tuittila, Jessica Turner, Masahito Ueyama, Alex C. Valach, Rodrigo Vargas, Andrej Varlagin, Alma Vazquez-Lule, Joseph G. Verfaillie, Timo Vesala, George L. Vourlitis, Eric J. Ward, Christian Wille, Georg Wohlfahrt, Guan Xhuan Wong, Zhen Zhang, Donatella Zona, Lisamarie Windham-Myers, Benjamin Poulter, and Robert B. Jackson
Earth Syst. Sci. Data, 13, 3607–3689, https://doi.org/10.5194/essd-13-3607-2021, https://doi.org/10.5194/essd-13-3607-2021, 2021
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Methane is an important greenhouse gas, yet we lack knowledge about its global emissions and drivers. We present FLUXNET-CH4, a new global collection of methane measurements and a critical resource for the research community. We use FLUXNET-CH4 data to quantify the seasonality of methane emissions from freshwater wetlands, finding that methane seasonality varies strongly with latitude. Our new database and analysis will improve wetland model accuracy and inform greenhouse gas budgets.
Marie-Louise Zeller, Jannis-Michael Huss, Lena Pfister, Karl E. Lapo, Daniela Littmann, Johann Schneider, Alexander Schulz, and Christoph K. Thomas
Earth Syst. Sci. Data, 13, 3439–3452, https://doi.org/10.5194/essd-13-3439-2021, https://doi.org/10.5194/essd-13-3439-2021, 2021
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The boundary layer (BL) is well understood when convectively mixed, yet we lack this understanding when it becomes stable and no longer follows classic similarity theories. The NYTEFOX campaign collected a unique meteorological data set in the Arctic BL of Svalbard during polar night, where it tends to be highly stable. Using innovative fiber-optic distributed sensing, we are able to provide unique insight into atmospheric motions across large distances resolved continuously in space and time.
Olli Peltola, Karl Lapo, Ilkka Martinkauppi, Ewan O'Connor, Christoph K. Thomas, and Timo Vesala
Atmos. Meas. Tech., 14, 2409–2427, https://doi.org/10.5194/amt-14-2409-2021, https://doi.org/10.5194/amt-14-2409-2021, 2021
Short summary
Short summary
We evaluated the suitability of fiber-optic distributed temperature sensing (DTS) for observing spatial (>25 cm) and temporal (>1 s) details of airflow within and above forests. The DTS measurements could discern up to third-order moments of the flow and observe spatial details of coherent flow motions. Similar measurements are not possible with more conventional measurement techniques. Hence, the DTS measurements will provide key insights into flows close to roughness elements, e.g. trees.
Cited articles
Aalto, J., Le Roux, P. C., and Luoto, M.: Vegetation mediates soil
temperature and moisture in arctic-alpine environments, Arct. Antarct. Alp. Res., 45, 429–439, https://doi.org/10.1657/1938-4246-45.4.429, 2013. a
Aurela, M., Riutta, T., Laurila, T., Tuovinen, J. P., Vesala, T., Tuittila,
E. S., Rinne, J., Haapanala, S., and Laine, J.: CO2 exchange
of a sedge fen in southern Finland – The impact of a drought period, Tellus B, 59, 826–837,
https://doi.org/10.1111/j.1600-0889.2007.00309.x, 2007. a
Bakeman, R.: Recommended effect size statistics for repeated measures designs, Behav. Res. Methods, 37, 379–384, 2005. a
Barthelemy, H., Stark, S., Michelsen, A., and Olofsson, J.: Urine is an
important nitrogen source for plants irrespective of vegetation composition
in an Arctic tundra: Insights from a 15N-enriched urea tracer experiment,
J. Ecol., 106, 367–378, https://doi.org/10.1111/1365-2745.12820, 2018. a, b
Beer, C., Zimov, N., Olofsson, J., Porada, P., and Zimov, S.: Protection of
Permafrost Soils from Thawing by Increasing Herbivore Density, Sci. Rep., 10, 4170, https://doi.org/10.1038/s41598-020-60938-y, 2020. a, b
Britton, C. M. and Dodd, J. D.: Relationships of Photosynthetically Active
Radiation, Agr. Meteorol., 17, 1–7,
https://doi.org/10.1016/0002-1571(76)90080-7, 1976. a
Cahoon, S. M., Sullivan, P. F., Post, E., and Welker, J. M.: Large herbivores
limit CO2 uptake and suppress carbon cycle responses to
warming in West Greenland, Glob. Change Biol., 18, 469–479,
https://doi.org/10.1111/j.1365-2486.2011.02528.x, 2012. a, b, c, d
Canty, A. and Ripley, B. D.: boot: Bootstrap R (S-Plus) Functions, r package
version 1.3–28, 2021. a
Cassidy, A. E., Christen, A., and Henry, G. H. R.: The effect of a permafrost disturbance on growing-season carbon-dioxide fluxes in a high Arctic tundra ecosystem, Biogeosciences, 13, 2291–2303, https://doi.org/10.5194/bg-13-2291-2016, 2016. a
Celis, G., Mauritz, M., Bracho, R., Salmon, V. G., Webb, E. E., Hutchings, J.,
Natali, S. M., Schädel, C., Crummer, K. G., and Schuur, E. A.: Tundra
is a consistent source of CO2 at a site with progressive
permafrost thaw during 6 years of chamber and eddy covariance measurements,
J. Geophys. Res.-Biogeo., 122, 1471–1485,
https://doi.org/10.1002/2016JG003671, 2017. a
Chang, Q., Wang, L., Ding, S., Xu, T., Li, Z., Song, X., Zhao, X., Wang, D.,
and Pan, D.: Grazer effects on soil carbon storage vary by herbivore
assemblage in a semi-arid grassland, J. Appl. Ecol., 55,
2517–2526, https://doi.org/10.1111/1365-2664.13166, 2018. a, b
Chang, Q., Xu, T., Ding, S., Wang, L., Liu, J., Wang, D., Wang, Y., Li, Z.,
Zhao, X., Song, X., and Pan, D.: Herbivore Assemblage as an Important Factor
Modulating Grazing Effects on Ecosystem Carbon Fluxes in a Meadow Steppe in
Northeast China, J. Geophys. Res.-Biogeo., 125,
1–12, https://doi.org/10.1029/2020JG005652, 2020. a, b
Chapin III, F. S., Sturm, M., Serreze, M. C., McFadden, J. P., Key, J. R.,
Lloyd, A. H., McGuire, A. D., Rupp, T. S., Lynch, A. H., Schimel, J. P.,
Beringer, J., Chapman, W. L., Epstein, H. E., Euskirchen, E. S., Hinzman,
L. D., Jia, G., Ping, C. L., Tape, K. D., Thompson, C. D., Walker, D. A., and
Welker, J. M.: Role of land-surface changes in arctic summer warming,
Science, 310, 657–660, https://doi.org/10.1126/science.1117368, 2005. a, b, c
Christensen, T. R., Friborg, T., Sommerkorn, M., Kaplan, J., Illeris, L.,
Soegaard, H., Nordstroem, C., and Jonasson, S.: Trace gas exchange in a
high-Arctic valley: 1. Variations in CO2 and
CH4 Flux between tundra vegetation types, Global
Biogeochem. Cy., 14, 701–713, https://doi.org/10.1029/1999GB001134, 2000. a
Cohen, J., Pulliainen, J., Ménard, C. B., Johansen, B., Oksanen, L.,
Luojus, K., and Ikonen, J.: Effect of reindeer grazing on snowmelt, albedo
and energy balance based on satellite data analyses, Remote Sens. Environ., 135, 107–117, https://doi.org/10.1016/j.rse.2013.03.029, 2013. a
Cromsigt, J. P., Kemp, Y. J., Rodriguez, E., and Kivit, H.: Rewilding Europe's
large grazer community: how functionally diverse are the diets of European
bison, cattle, and horses?, Restor. Ecol., 26, 891–899,
https://doi.org/10.1111/rec.12661, 2018. a
Curasi, S. R., Loranty, M. M., and Natali, S. M.: Water track distribution and
effects on carbon dioxide flux in an eastern Siberian upland tundra
landscape, Environ. Res. Lett., 11, 045002, https://doi.org/10.1088/1748-9326/11/4/045002, 2016. a, b
Dyksterhuis, E. J. and Schmutz, E. M.: Natural Mulches or “Litter” of
Grasslands: With Kinds and Amounts on a Southern Prairie, Ecology, 28,
163–179, https://doi.org/10.2307/1930949, 1947. a, b
Epstein, H. E., Raynolds, M. K., Walker, D. A., Bhatt, U. S., Tucker, C. J.,
and Pinzon, J. E.: Dynamics of aboveground phytomass of the circumpolar
Arctic tundra during the past three decades, Environ. Res. Lett.,
7, 015506, https://doi.org/10.1088/1748-9326/7/1/015506, 2012. a
Euskirchen, E. S., Edgar, C. W., Syndonia Bret-Harte, M., Kade, A., Zimov,
N., and Zimov, S.: Interannual and Seasonal Patterns of Carbon Dioxide,
Water, and Energy Fluxes From Ecotonal and Thermokarst-Impacted Ecosystems on
Carbon-Rich Permafrost Soils in Northeastern Siberia, J. Geophys. Res.-Biogeo., 122, 2651–2668, https://doi.org/10.1002/2017JG004070, 2017. a
Farquhar, G. D. and Sharkey, T. D.: Stomatal conductance and photosynthesis,
Annu. Rev. Plant Phys., 33, 317–345, 1982. a
Field, C. B., Chapin III, F. S., Matson, P. A., and Mooney, H. A.: Responses of terrestrial ecosystems to the changing atmosphere: a resource-based approach,
Annu. Rev. Ecol. Syst., 23, 201–235, 1992. a
Glover, S. and Dixon, P.: Likelihood ratios: A simple and flexible statistic
for empirical psychologists, Psychon. B. Rev., 11, 791–806,
2004. a
Göckede, M., Kittler, F., Jung Kwon, M., Burjack, I., Heimann, M.,
Kolle, O., Zimov, N., and Zimov, S.: Shifted energy fluxes, increased Bowen
ratios, and reduced thaw depths linked with drainage-induced changes in
permafrost ecosystem structure, Cryosphere, 11, 2975–2996,
https://doi.org/10.5194/tc-11-2975-2017, 2017. a
Goeckede, M. and Fischer, W.: Flux chamber data and ancillary measurements from Pleistocene Park, Northeast Siberia, Edmond, V1 [data set], https://doi.org/10.17617/3.91, 2022. a
Gornall, J. L., Woodin, S. J., Jónsdóttir, I. S., and van der Wal,
R.: Herbivore impacts to the moss layer determine tundra ecosystem response
to grazing and warming, Oecologia, 161, 747–758,
https://doi.org/10.1007/s00442-009-1427-5, 2009. a
Grogan, P.: Cold season respiration across a low arctic landscape: The
influence of vegetation type, snow depth, and interannual climatic
variation, Arct. Antarct. Alp. Res., 44, 446–456,
https://doi.org/10.1657/1938-4246-44.4.446, 2012. a
Harden, J. W., Koven, C. D., Ping, C. L., Hugelius, G., McGuire, A. D., Camill, P., Jorgenson, T., Kuhry, P., Michaelson, G. J., O'Donnell, J. A.,
Schuur, E. A. G., Tarnocai, C., Johnson, K., and Grosse, G.: Field information
links permafrost carbon to physical vulnerabilities of thawing, Geophys. Res. Lett., 39, 1–6, https://doi.org/10.1029/2012GL051958, 2012. a
Hofstede, R. G. and Rossenaar, A. J.: Biomass of Grazed, Burned, and Undisturbed Páramo Grasslands, Colombia. II. Root Mass and Aboveground:Belowground Ratio, Arctic Alpine Res., 27, 13–18,
https://doi.org/10.2307/1552063, 1995. a, b
Hollister, R. D., May, J. L., Kremers, K. S., Tweedie, C. E., Oberbauer, S. F.,
Liebig, J. A., Botting, T. F., Barrett, R. T., and Gregory, J. L.: Warming
experiments elucidate the drivers of observed directional changes in tundra
vegetation, Ecol. Evol., 5, 1881–1895, https://doi.org/10.1002/ece3.1499,
2015. a, b
Holm, S.: A simple sequentially rejective multiple test procedure, Scand. J. Stat., 6, 65–70, 1979. a
Huemmrich, K. F., Kinoshita, G., Gamon, J. A., Houston, S., Kwon, H., and
Oechel, W. C.: Tundra carbon balance under varying temperature and moisture
regimes, J. Geophys. Res.-Biogeo., 115, G00I02, https://doi.org/10.1029/2009jg001237, 2010. a, b, c
Hugelius, G., Strauss, J., Zubrzycki, S., Harden, J. W., Schuur, E. A. G., Ping, C.-L., Schirrmeister, L., Grosse, G., Michaelson, G. J., Koven, C. D., O'Donnell, J. A., Elberling, B., Mishra, U., Camill, P., Yu, Z., Palmtag, J., and Kuhry, P.: Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps, Biogeosciences, 11, 6573–6593, https://doi.org/10.5194/bg-11-6573-2014, 2014. a, b
Kelsey, K. C., Leffler, A. J., Beard, K. H., Schmutz, J. A., Choi, R. T., and
Welker, J. M.: Interactions among vegetation, climate, and herbivory control
greenhouse gas fluxes in a subarctic coastal wetland, J. Geophys. Res.-Biogeo., 121, 2960–2975, https://doi.org/10.1002/2016JG003546, 2016. a, b
Killick, R., Haynes, K., and Eckley, I.: Changepoint: an R package for
changepoint analysis, R package version 2.2., 2, 2016. a
Kittler, F., Burjack, I., Corradi, C. A. R., Heimann, M., Kolle, O., Merbold, L., Zimov, N., Zimov, S., and Göckede, M.: Impacts of a decadal drainage disturbance on surface–atmosphere fluxes of carbon dioxide in a permafrost ecosystem, Biogeosciences, 13, 5315–5332, https://doi.org/10.5194/bg-13-5315-2016, 2016. a
Kittler, F., Heimann, M., Kolle, O., Zimov, N., Zimov, S., and Göckede,
M.: Long-Term Drainage Reduces CO2 Uptake and
CH4 Emissions in a Siberian Permafrost Ecosystem, Global
Biogeochem. Cy., 31, 1704–1717, https://doi.org/10.1002/2017GB005774, 2017. a
Kutzbach, L., Schneider, J., Sachs, T., Giebels, M., Nykänen, H., Shurpali, N. J., Martikainen, P. J., Alm, J., and Wilmking, M.: CO2 flux determination by closed-chamber methods can be seriously biased by inappropriate application of linear regression, Biogeosciences, 4, 1005–1025, https://doi.org/10.5194/bg-4-1005-2007, 2007. a, b
Kwon, M. J., Heimann, M., Kolle, O., Luus, K. A., Schuur, E. A. G., Zimov, N., Zimov, S. A., and Göckede, M.: Long-term drainage reduces CO2 uptake and increases CO2 emission on a Siberian floodplain due to shifts in vegetation community and soil thermal characteristics, Biogeosciences, 13, 4219–4235, https://doi.org/10.5194/bg-13-4219-2016, 2016. a, b, c, d, e, f, g, h, i, j, k, l, m
Kwon, M. J., Beulig, F., Ilie, I., Wildner, M., Küsel, K., Merbold, L.,
Mahecha, M. D., Zimov, N., Zimov, S. A., Heimann, M., Schuur, E. A., Kostka,
J. E., Kolle, O., Hilke, I., and Göckede, M.: Plants, microorganisms,
and soil temperatures contribute to a decrease in methane fluxes on a drained
Arctic floodplain, Glob. Change Biol., 23, 2396–2412,
https://doi.org/10.1111/gcb.13558, 2017. a, b, c
Lafleur, P. M.: Connecting atmosphere and wetland: Trace gas exchange,
Geography Compass, 3, 560–585, https://doi.org/10.1111/j.1749-8198.2008.00212.x, 2009. a
Larter, N. C. and Nagy, J. A.: Variation between Snow Conditions at Peary
Caribou and Muskox Feeding Sites and Elsewhere in Foraging Habitats on Banks
Island in the Canadian High Arctic, Arct. Antarct. Alp. Res.,
33, 123–130, https://doi.org/10.1080/15230430.2001.12003414, 2001. a
Lawrence, M. A.: ez: Easy Analysis and Visualization of Factorial Experiments, https://CRAN.R-project.org/package=ez (last access: 14 March 2022), r package version 4.4-0, 2016. a
López-Blanco, E., Lund, M., Williams, M., Tamstorf, M. P., Westergaard-Nielsen, A., Exbrayat, J.-F., Hansen, B. U., and Christensen, T. R.: Exchange of CO2 in Arctic tundra: impacts of meteorological variations and biological disturbance, Biogeosciences, 14, 4467–4483, https://doi.org/10.5194/bg-14-4467-2017, 2017. a
Manseau, M., Huot, J., and Crete, M.: Effects of Summer Grazing by Caribou on
Composition and Productivity of Vegetation: Community and Landscape Level, J. Ecol., 84, 503, https://doi.org/10.2307/2261473, 1996. a, b
McEwing, K. R., Fisher, J. P., and Zona, D.: Environmental and vegetation
controls on the spatial variability of CH4 emission from
wet-sedge and tussock tundra ecosystems in the Arctic, Plant Soil, 388,
37–52, https://doi.org/10.1007/s11104-014-2377-1, 2015. a
Mekonnen, Z. A., Riley, W. J., Berner, L. T., Bouskill, N. J., Torn, M. S., Iwahana, G., Breen, A. L., Myers-Smith, I. H., Criado, M. G., Liu, Y., Euskirchen, E. S., Goetz, S. J., Mack, M. C., and Grant, R. F.: Arctic tundra shrubification: a review of mechanisms and impacts on ecosystem carbon balance, Environ. Res. Lett., 16, 053001, https://doi.org/10.1088/1748-9326/abf28b, 2021. a
Metcalfe, D. B. and Olofsson, J.: Distinct impacts of different mammalian
herbivore assemblages on arctic tundra CO2 exchange during
the peak of the growing season, Oikos, 124, 1632–1638,
https://doi.org/10.1111/oik.02085, 2015. a, b, c, d
Myers-Smith, I. H., Forbes, B. C., Wilmking, M., Hallinger, M., Lantz, T.,
Blok, D., Tape, K. D., Macias-Fauria, M., Sass-Klaassen, U., Lévesque,
E., Boudreau, S., Ropars, P., Hermanutz, L., Trant, A., Collier, L. S.,
Weijers, S., Rozema, J., Rayback, S. A., Schmidt, N. M., Schaepman-Strub, G.,
Wipf, S., Rixen, C., Ménard, C. B., Venn, S., Goetz, S., Andreu-Hayles,
L., Elmendorf, S., Ravolainen, V., Welker, J., Grogan, P., Epstein, H. E.,
and Hik, D. S.: Shrub expansion in tundra ecosystems: Dynamics, impacts and
research priorities, Environ. Res. Lett., 6, 045509, https://doi.org/10.1088/1748-9326/6/4/045509, 2011. a
Natali, S. M., Schuur, E. A., Webb, E. E., Pries, C. E., and Crummer, K. G.:
Permafrost degradation stimulates carbon loss from experimentally warmed
tundra, Ecology, 95, 602–608, https://doi.org/10.1890/13-0602.1, 2014. a
Natali, S. M., Schuur, E. A., Mauritz, M., Schade, J. D., Celis, G., Crummer,
K. G., Johnston, C., Krapek, J., Pegoraro, E., Salmon, V. G., and Webb,
E. E.: Permafrost thaw and soil moisture driving CO2 and
CH4 release from upland tundra, J. Geophys. Res.-Biogeo., 120, 525–537, https://doi.org/10.1002/2014JG002872, 2015. a, b, c, d
Oberbauer, S. F., Tweedie, C. E., Welker, J. M., Fahnestock, J. T., Henry,
G. H., Webber, P. J., Hollister, R. D., Walker, M. D., Kuchy, A., Elmore, E.,
and Starr, G.: Tundra CO2 fluxes in response to experimental
warming across latitudinal and moisture gradients, Ecol. Monogr.,
77, 221–238, https://doi.org/10.1890/06-0649, 2007. a
Ochsner, T. E., Horton, R., and Ren, T.: A New Perspective on Soil Thermal
Properties, Soil Sci. Soc. Am. J., 65, 1641–1647,
https://doi.org/10.2136/sssaj2001.1641, 2001. a
Oechel, W. C., Vourlitis, G. L., Hastings, S. J., Ault, R. P., and Bryant, P.:
The effects of water table manipulation and elevated temperature on the net
CO2 flux of wet sedge tundra ecosystems, Glob. Change Biol., 4, 77–90, https://doi.org/10.1046/j.1365-2486.1998.00110.x, 1998. a
Olofsson, J.: Short- and long-term effects of changes in reindeer grazing
pressure on tundra heath vegetation, J. Ecol., 94, 431–440,
https://doi.org/10.1111/j.1365-2745.2006.01100.x, 2006. a, b
Olofsson, J., Stark, S., and Oksanen, L.: Reindeer influence on ecosystem
processes in the tundra, Oikos, 105, 386–396,
https://doi.org/10.1111/j.0030-1299.2004.13048.x, 2004. a, b, c, d
Overland, J., Francis, J. A., Hall, R., Hanna, E., Kim, S.-J., and Vihma, T.:
The melting Arctic and midlatitude weather patterns: Are they connected?,
J. Climate, 28, 7917–7932, 2015. a
Pucheta, E., Bonamici, I., Cabido, M., and Díaz, S.: Below-ground
biomass and productivity of a grazed site and a neighbouring ungrazed
exclosure in a grassland in central Argentina, Austral Ecol., 29,
201–208, https://doi.org/10.1111/j.1442-9993.2004.01337.x, 2004. a, b
Raillard, M. C. and Svoboda, J.: Exact Growth and Increased Nitrogen
Compensation by the Arctic Sedge Carex aquatilis var. stans after Simulated
Grazing, Arct. Antarct. Alp. Res., 31, 21–26,
https://doi.org/10.1080/15230430.1999.12003277, 1999. a, b, c, d
R Core Team: R: A Language and Environment for Statistical Computing, version 4.1.1, R Foundation for Statistical Computing, Vienna, Austria, https://www.R-project.org/ (last access: 14 March 2022), 2021. a
Runkle, B. R. K., Sachs, T., Wille, C., Pfeiffer, E.-M., and Kutzbach, L.: Bulk partitioning the growing season net ecosystem exchange of CO2 in Siberian tundra reveals the seasonality of its carbon sequestration strength, Biogeosciences, 10, 1337–1349, https://doi.org/10.5194/bg-10-1337-2013, 2013. a, b
Salmon, V. G., Soucy, P., Mauritz, M., Celis, G., Natali, S. M., Mack, M. C.,
and Schuur, E. A.: Nitrogen availability increases in a tundra ecosystem
during five years of experimental permafrost thaw, Glob. Change Biol., 22, 1927–1941, https://doi.org/10.1111/gcb.13204, 2016. a
Schädel, C., Bader, M. K., Schuur, E. A., Biasi, C., Bracho, R., Capek,
P., De Baets, S., Diáková, K., Ernakovich, J., Estop-Aragones,
C., Graham, D. E., Hartley, I. P., Iversen, C. M., Kane, E., Knoblauch, C.,
Lupascu, M., Martikainen, P. J., Natali, S. M., Norby, R. J., O'Donnell,
J. A., Chowdhury, T. R., Šantrucková, H., Shaver, G., Sloan,
V. L., Treat, C. C., Turetsky, M. R., Waldro, M. P., and Wickland, K. P.:
Potential carbon emissions dominated by carbon dioxide from thawed
permafrost soils, Nat. Clim. Change, 6, 950–953,
https://doi.org/10.1038/nclimate3054, 2016. a
Schuur, E. A., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., and
Osterkamp, T. E.: The effect of permafrost thaw on old carbon release and
net carbon exchange from tundra, Nature, 459, 556–559,
https://doi.org/10.1038/nature08031, 2009. a, b
Schuur, E. A., McGuire, A. D., Schädel, C., Grosse, G., Harden, J. W.,
Hayes, D. J., Hugelius, G., Koven, C. D., Kuhry, P., Lawrence, D. M., Natali,
S. M., Olefeldt, D., Romanovsky, V. E., Schaefer, K., Turetsky, M. R., Treat,
C. C., and Vonk, J. E.: Climate change and the permafrost carbon feedback,
Nature, 520, 171–179, https://doi.org/10.1038/nature14338, 2015. a
Sitters, J., Kimuyu, D. M., Young, T. P., Claeys, P., and Olde Venterink, H.:
Negative effects of cattle on soil carbon and nutrient pools reversed by
megaherbivores, Nature Sustainability, 3, 360–366,
https://doi.org/10.1038/s41893-020-0490-0, 2020. a, b
Stark, S., Julkunen-Tiitto, R., and Kumpula, J.: Ecological role of reindeer
summer browsing in the mountain birch (Betula pubescens ssp. czerepanovii)
forests: Effects on plant defense, litter decomposition, and soil nutrient
cycling, Oecologia, 151, 486–498, https://doi.org/10.1007/s00442-006-0593-y, 2007. a
Tarnocai, C., Canadell, J. G., Schuur, E. A. G., Kuhry, P., Mazhitova, G., and
Zimov, S.: Soil organic carbon pools in the northern circumpolar permafrost
region, Global Biogeochem. Cy., 23, GB2023, https://doi.org/10.1029/2008gb003327, 2009. a
Te Beest, M., Sitters, J., Ménard, C. B., and Olofsson, J.: Reindeer
grazing increases summer albedo by reducing shrub abundance in Arctic
tundra, Environ. Res. Lett., 11, 125013,
https://doi.org/10.1088/1748-9326/aa5128, 2016. a, b, c, d
Tolvanen, A. and Henry, G. H. R.: Population Structure of Three Dominant
Sedges under Muskox Herbivory in the High Arctic, Arct. Antarct. Alp. Res., 32, 449–455, https://doi.org/10.1080/15230430.2000.12003389, 2000. a, b
Ueyama, M., Iwata, H., and Harazono, Y.: Autumn warming reduces the
CO2 sink of a black spruce forest in interior Alaska based on
a nine-year eddy covariance measurement, Glob. Change Biol., 20,
1161–1173, https://doi.org/10.1111/gcb.12434, 2014.
a
Vandandorj, S., Eldridge, D. J., Travers, S. K., Val, J., and Oliver, I.:
Microsite and grazing intensity drive infiltration in a semiarid woodland,
Ecohydrology, 10, e183, https://doi.org/10.1002/eco.1831, 2017. a
Väisänen, M., Ylänne, H., Kaarlejärvi, E.,
Sjögersten, S., Olofsson, J., Crout, N., and Stark, S.: Consequences
of warming on tundra carbon balance determined by reindeer grazing history,
Nat. Clim. Change, 4, 384–388, https://doi.org/10.1038/nclimate2147, 2014. a, b, c
Windirsch, T., Grosse, G., Ulrich, M., Forbes, B. C., Göckede, M., Wolter, J., Macias-Fauria, M., Olofsson, J., Zimov, N., and Strauss, J.: Large Herbivores Affecting Permafrost – Impacts of Grazing on Permafrost Soil Carbon Storage in Northeastern Siberia, Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2021-227, in review, 2021. a
Winslow, L. A., Zwart, J. A., Batt, R. D., Dugan, H. A., Woolway, R. I.,
Corman, J. R., Hanson, P. C., and Read, J. S.: LakeMetabolizer: an R package
for estimating lake metabolism from free-water oxygen using diverse
statistical models, Inland Waters, 6, 622–636, 2016. a
Yan, Y., Yan, R., Chen, J., Xin, X., Eldridge, D. J., Shao, C., Wang, X., Lv,
S., Jin, D., Chen, J., Guo, Z., Chen, B., and Xu, L.: Grazing modulates soil
temperature and moisture in a Eurasian steppe, Agr. Forest
Meteorol., 262, 157–165, https://doi.org/10.1016/j.agrformet.2018.07.011, 2018. a
Ylänne, H. and Stark, S.: Distinguishing Rapid and Slow C Cycling
Feedbacks to Grazing in Sub-arctic Tundra, Ecosystems, 22, 1145–1159,
https://doi.org/10.1007/s10021-018-0329-y, 2019. a, b, c, d
Zimov, S. A., Chuprynin, V. I., Oreshko, A. P., Chapin, F. S., Reynolds, J. F., and Chapin, M. C.: Steppe-Tundra Transition – a Herbivore-Driven Biome Shift at the End of the Pleistocene, Am. Nat., 146, 765–794, https://doi.org/10.1086/285824, 1995. a
Zimov, S. A., Zimov, N. S., Tikhonov, A. N., and Chapin III, F. S.: Mammoth
steppe: A high-productivity phenomenon, Quaternary Sci. Rev., 57,
26–45, https://doi.org/10.1016/j.quascirev.2012.10.005, 2012. a, b
Zona, D., Lipson, D. A., Zulueta, R. C., Oberbauer, S. F., and Oechel, W. C.:
Microtopographic controls on ecosystem functioning in the Arctic Coastal
Plain, J. Geophys. Res.-Biogeo., 116, 1–12,
https://doi.org/10.1029/2009JG001241, 2011. a, b
Short summary
Arctic permafrost ecosystems may release large amounts of carbon under warmer future climates and may therefore accelerate global climate change. Our study investigated how long-term grazing by large animals influenced ecosystem characteristics and carbon budgets at a Siberian permafrost site. Our results demonstrate that such management can contribute to stabilizing ecosystems to keep carbon in the ground, particularly through drying soils and reducing methane emissions.
Arctic permafrost ecosystems may release large amounts of carbon under warmer future climates...
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