Articles | Volume 15, issue 1
https://doi.org/10.5194/bg-15-263-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-15-263-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
11 Jan 2018
Research article |
| 11 Jan 2018
Can land degradation drive differences in the C exchange of two similar semiarid ecosystems?
Ana López-Ballesteros
CORRESPONDING AUTHOR
Departamento de Ecología, Universidad de Granada, 18071 Granada, Spain
Departamento de Desertificación y Geo-ecología, Estación Experimental de Zonas Áridas (CSIC), 04120 Almería, Spain
Cecilio Oyonarte
Departamento de Agronomía, Universidad de Almería, 04120 Almería, Spain
Centro Andaluz de Evaluación y Seguimiento del Cambio Global (CAESCG), Universidad de Almería, 04120 Almería, Spain
Andrew S. Kowalski
Departamento de Física Aplicada, Universidad de Granada, 18071 Granada, Spain
Instituto Interuniversitario de Investigación del Sistema Tierra en Andalucía (IISTA-CEAMA), Universidad de Granada, 18006 Granada, Spain
Penélope Serrano-Ortiz
Departamento de Ecología, Universidad de Granada, 18071 Granada, Spain
Instituto Interuniversitario de Investigación del Sistema Tierra en Andalucía (IISTA-CEAMA), Universidad de Granada, 18006 Granada, Spain
Enrique P. Sánchez-Cañete
Departamento de Física Aplicada, Universidad de Granada, 18071 Granada, Spain
Instituto Interuniversitario de Investigación del Sistema Tierra en Andalucía (IISTA-CEAMA), Universidad de Granada, 18006 Granada, Spain
B2 Earthscience, Biosphere 2, University of Arizona, Tucson, Arizona, 85721, USA
M. Rosario Moya
Departamento de Desertificación y Geo-ecología, Estación Experimental de Zonas Áridas (CSIC), 04120 Almería, Spain
Francisco Domingo
Departamento de Desertificación y Geo-ecología, Estación Experimental de Zonas Áridas (CSIC), 04120 Almería, Spain
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Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
Biogeosciences, 21, 5117–5129, https://doi.org/10.5194/bg-21-5117-2024, https://doi.org/10.5194/bg-21-5117-2024, 2024
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the eddy covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate-change-induced droughts.
Pilar Durante, Juan Miguel Requena-Mullor, Rodrigo Vargas, Mario Guevara, Domingo Alcaraz-Segura, and Cecilio Oyonarte
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2024-431, https://doi.org/10.5194/essd-2024-431, 2024
Preprint under review for ESSD
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Human activities have disrupted the global carbon cycle, increasing CO2 levels. Soils are the largest carbon stores on land, making it essential to understand how much carbon they hold to fight climate change. Our study improved estimates of soil carbon in peninsular Spain by integrating historical soil data and using machine-learning methods to create detailed maps of carbon content. These maps will help manage soil carbon better and support efforts to track carbon emissions globally.
Andrew S. Kowalski
EGUsphere, https://doi.org/10.5194/egusphere-2024-1966, https://doi.org/10.5194/egusphere-2024-1966, 2024
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The laws of physics show that leaf oxygen is not photosynthetically enriched, but extremely dilute due to the overwhelming effects of humidification. This challenges the prevailing diffusion-only paradigm regarding leaf gas exchanges, requiring non-diffusive transport. Such transport also explains why fluxes of carbon dioxide and water vapour become decoupled at very high temperatures, as has been observed but not explained by plant physiologists.
Sergio Aranda-Barranco, Penélope Serrano-Ortiz, Andrew S. Kowalski, and Enrique P. Sánchez-Cañete
EGUsphere, https://doi.org/10.5194/egusphere-2024-848, https://doi.org/10.5194/egusphere-2024-848, 2024
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This study investigated soil respiration and the main factors involved in a semiarid environment (olive grove). For this purpose, one year of automatic multi-chamber measurements were used, accompanied by ecosystem respiration data obtained using the eddy covariance technique. The soil respiration annual balance, Q10 parameter, rain pulses, and spatial and temporal variability of soil respiration are presented in this manuscript.
Daphne Armas, Mario Guevara, Fernando Bezares, Rodrigo Vargas, Pilar Durante, Víctor Osorio, Wilmer Jiménez, and Cecilio Oyonarte
Earth Syst. Sci. Data, 15, 431–445, https://doi.org/10.5194/essd-15-431-2023, https://doi.org/10.5194/essd-15-431-2023, 2023
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The global need for updated soil datasets has increased. Our main objective was to synthesize and harmonize soil profile information collected by two different projects in Ecuador between 2009 and 2015.The main result was the development of the Harmonized Soil Database of Ecuador (HESD) that includes information from 13 542 soil profiles with over 51 713 measured soil horizons, including 92 different edaphic variables, and follows international standards for archiving and sharing soil data.
Andrew S. Kowalski
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2018-195, https://doi.org/10.5194/hess-2018-195, 2018
Preprint withdrawn
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This technical note derives the additional specific energy of evaporation, beyond the latent heat of vaporization, as the work done against ambient pressure when water expands from the liquid to the gas phase. The derivation yields a simple function of the virtual temperature, and corrects for a systematic 3–4 % underestimation of the energy required to evaporate water into the Earth's atmosphere.
Andrew S. Kowalski
Atmos. Chem. Phys., 17, 8177–8187, https://doi.org/10.5194/acp-17-8177-2017, https://doi.org/10.5194/acp-17-8177-2017, 2017
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An analysis based on physical conservation law demonstrates that surface–atmosphere exchanges include a non-diffusive component. This implies the need to revise flux gradient relationships including eddy diffusivities in micrometeorology and stomatal conductances in plant physiology.
Gianluca Tramontana, Martin Jung, Christopher R. Schwalm, Kazuhito Ichii, Gustau Camps-Valls, Botond Ráduly, Markus Reichstein, M. Altaf Arain, Alessandro Cescatti, Gerard Kiely, Lutz Merbold, Penelope Serrano-Ortiz, Sven Sickert, Sebastian Wolf, and Dario Papale
Biogeosciences, 13, 4291–4313, https://doi.org/10.5194/bg-13-4291-2016, https://doi.org/10.5194/bg-13-4291-2016, 2016
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We have evaluated 11 machine learning (ML) methods and two complementary drivers' setup to estimate the carbon dioxide (CO2) and energy exchanges between land ecosystems and atmosphere. Obtained results have shown high consistency among ML and high capability to estimate the spatial and seasonal variability of the target fluxes. The results were good for all the ecosystems, with limitations to the ones in the extreme environments (cold, hot) or less represented in the training data (tropics).
E. P. Sánchez-Cañete, A. S. Kowalski, P. Serrano-Ortiz, O. Pérez-Priego, and F. Domingo
Biogeosciences, 10, 6591–6600, https://doi.org/10.5194/bg-10-6591-2013, https://doi.org/10.5194/bg-10-6591-2013, 2013
M. Roland, P. Serrano-Ortiz, A. S. Kowalski, Y. Goddéris, E. P. Sánchez-Cañete, P. Ciais, F. Domingo, S. Cuezva, S. Sanchez-Moral, B. Longdoz, D. Yakir, R. Van Grieken, J. Schott, C. Cardell, and I. A. Janssens
Biogeosciences, 10, 5009–5017, https://doi.org/10.5194/bg-10-5009-2013, https://doi.org/10.5194/bg-10-5009-2013, 2013
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Luana Krebs, Susanne Burri, Iris Feigenwinter, Mana Gharun, Philip Meier, and Nina Buchmann
Biogeosciences, 21, 2005–2028, https://doi.org/10.5194/bg-21-2005-2024, https://doi.org/10.5194/bg-21-2005-2024, 2024
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This study explores year-round forest-floor greenhouse gas (GHG) fluxes in a Swiss spruce forest. Soil temperature and snow depth affected forest-floor respiration, while CH4 uptake was linked to snow cover. Negligible N2O fluxes were observed. In 2022, a warm year, CO2 emissions notably increased. The study suggests rising forest-floor GHG emissions due to climate change, impacting carbon sink behavior. Thus, for future forest management, continuous year-round GHG flux measurements are crucial.
Simone Rodrigues, Glauber Cirino, Demerval Moreira, Andrea Pozzer, Rafael Palácios, Sung-Ching Lee, Breno Imbiriba, José Nogueira, Maria Isabel Vitorino, and George Vourlitis
Biogeosciences, 21, 843–868, https://doi.org/10.5194/bg-21-843-2024, https://doi.org/10.5194/bg-21-843-2024, 2024
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Matthew Gordon Davis, Kevin Yan, and Jennifer Grace Murphy
EGUsphere, https://doi.org/10.5194/egusphere-2024-126, https://doi.org/10.5194/egusphere-2024-126, 2024
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Ammonia applied as fertilizer can volatilize into the atmosphere, this can threaten vulnerable ecosystems and human health. We investigated the partitioning of ammonia between an immobile adsorbed phase and mobile aqueous phase using several adsorption models. Using the Temkin model we determined that previous approaches to this issue may over-estimate the quantity available for exchange by a factor of 5 – 12, suggesting that ammonia emissions from soil may be overestimated.
Ruben B. Schulte, Jordi Vilà-Guerau de Arellano, Susanna Rutledge-Jonker, Shelley van der Graaf, Jun Zhang, and Margreet C. van Zanten
Biogeosciences, 21, 557–574, https://doi.org/10.5194/bg-21-557-2024, https://doi.org/10.5194/bg-21-557-2024, 2024
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We analyzed measurements with the aim of finding relations between the surface atmosphere exchange of NH3 and the CO2 uptake and transpiration by vegetation. We found a high correlation of daytime NH3 emissions with both latent heat flux and photosynthetically active radiation. Very few simultaneous measurements of NH3, CO2 fluxes and meteorological variables exist at sub-diurnal timescales. This study paves the way to finding more robust relations between the NH3 exchange flux and CO2 uptake.
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Biogeosciences, 20, 5087–5108, https://doi.org/10.5194/bg-20-5087-2023, https://doi.org/10.5194/bg-20-5087-2023, 2023
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We present an analysis of soil CO2 emissions in boreal and tundra regions during the non-growing season. We show that when the soil is completely frozen, soil temperature is the main control on CO2 emissions. When the soil is around the freezing point, with a mix of liquid water and ice, the liquid water content is the main control on CO2 emissions. This study highlights that the vegetation–snow–soil interactions must be considered to understand soil CO2 emissions during the non-growing season.
Yuhao Cui, Eri Tachibana, Kimitaka Kawamura, and Yuzo Miyazaki
Biogeosciences, 20, 4969–4980, https://doi.org/10.5194/bg-20-4969-2023, https://doi.org/10.5194/bg-20-4969-2023, 2023
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Fatty alcohols (FAs) are major components of surface lipids in plant leaves and serve as surface-active aerosols. Our study on the aerosol size distributions in a forest suggests that secondary FAs (SFAs) originated from plant waxes and that leaf senescence status is likely an important factor controlling the size distribution of SFAs. This study provides new insights into the sources of primary biological aerosol particles (PBAPs) and their effects on the aerosol ice nucleation activity.
Joyson Ahongshangbam, Liisa Kulmala, Jesse Soininen, Yasmin Frühauf, Esko Karvinen, Yann Salmon, Anna Lintunen, Anni Karvonen, and Leena Järvi
Biogeosciences, 20, 4455–4475, https://doi.org/10.5194/bg-20-4455-2023, https://doi.org/10.5194/bg-20-4455-2023, 2023
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Urban vegetation is important for removing urban CO2 emissions and cooling. We studied the response of urban trees' functions (photosynthesis and transpiration) to a heatwave and drought at four urban green areas in the city of Helsinki. We found that tree water use was increased during heatwave and drought periods, but there was no change in the photosynthesis rates. The heat and drought conditions were severe at the local scale but were not excessive enough to restrict urban trees' functions.
Ryan Vella, Andrea Pozzer, Matthew Forrest, Jos Lelieveld, Thomas Hickler, and Holger Tost
Biogeosciences, 20, 4391–4412, https://doi.org/10.5194/bg-20-4391-2023, https://doi.org/10.5194/bg-20-4391-2023, 2023
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We investigated the effect of the El Niño–Southern Oscillation (ENSO) on biogenic volatile organic compound (BVOC) emissions from plants. ENSO events can cause a significant increase in these emissions, which have a long-term impact on the Earth's atmosphere. Persistent ENSO conditions can cause long-term changes in vegetation, resulting in even higher BVOC emissions. We link ENSO-induced emission anomalies with driving atmospheric and vegetational variables.
Nadav Bekin and Nurit Agam
Biogeosciences, 20, 3791–3802, https://doi.org/10.5194/bg-20-3791-2023, https://doi.org/10.5194/bg-20-3791-2023, 2023
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The mechanisms of soil CO2 flux in dry desert soils are not fully understood. Yet studies conducted in desert ecosystems rarely discuss potential errors related to using the commonly used flux chambers in dry and bare soils. In our study, the conventional deployment practice of the chambers underestimated the instantaneous CO2 flux by up to 50 % and the total daily CO2 uptake by 35 %. This suggests that desert soils are a larger carbon sink than previously reported.
Rosemary J. Eufemio, Ingrid de Almeida Ribeiro, Todd L. Sformo, Gary A. Laursen, Valeria Molinero, Janine Fröhlich-Nowoisky, Mischa Bonn, and Konrad Meister
Biogeosciences, 20, 2805–2812, https://doi.org/10.5194/bg-20-2805-2023, https://doi.org/10.5194/bg-20-2805-2023, 2023
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Lichens, the dominant vegetation in the Arctic, contain ice nucleators (INs) that enable freezing close to 0°C. Yet the abundance, diversity, and function of lichen INs is unknown. Our screening of lichens across Alaska reveal that most species have potent INs. We find that lichens contain two IN populations which retain activity under environmentally relevant conditions. The ubiquity and stability of lichen INs suggest that they may have considerable impacts on local atmospheric patterns.
Doaa Aboelyazeed, Chonggang Xu, Forrest M. Hoffman, Jiangtao Liu, Alex W. Jones, Chris Rackauckas, Kathryn Lawson, and Chaopeng Shen
Biogeosciences, 20, 2671–2692, https://doi.org/10.5194/bg-20-2671-2023, https://doi.org/10.5194/bg-20-2671-2023, 2023
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Photosynthesis is critical for life and has been affected by the changing climate. Many parameters come into play while modeling, but traditional calibration approaches face many issues. Our framework trains coupled neural networks to provide parameters to a photosynthesis model. Using big data, we independently found parameter values that were correlated with those in the literature while giving higher correlation and reduced biases in photosynthesis rates.
Norbert Pirk, Kristoffer Aalstad, Yeliz A. Yilmaz, Astrid Vatne, Andrea L. Popp, Peter Horvath, Anders Bryn, Ane Victoria Vollsnes, Sebastian Westermann, Terje Koren Berntsen, Frode Stordal, and Lena Merete Tallaksen
Biogeosciences, 20, 2031–2047, https://doi.org/10.5194/bg-20-2031-2023, https://doi.org/10.5194/bg-20-2031-2023, 2023
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We measured the land–atmosphere exchange of CO2 and water vapor in alpine Norway over 3 years. The extremely snow-rich conditions in 2020 reduced the total annual evapotranspiration to 50 % and reduced the growing-season carbon assimilation to turn the ecosystem from a moderate annual carbon sink to an even stronger source. Our analysis suggests that snow cover anomalies are driving the most consequential short-term responses in this ecosystem’s functioning.
Hamadou Balde, Gabriel Hmimina, Yves Goulas, Gwendal Latouche, and Kamel Soudani
Biogeosciences, 20, 1473–1490, https://doi.org/10.5194/bg-20-1473-2023, https://doi.org/10.5194/bg-20-1473-2023, 2023
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This study focuses on the relationship between sun-induced chlorophyll fluorescence (SIF) and ecosystem gross primary productivity (GPP) across the ICOS European flux tower network. It shows that SIF, coupled with reflectance observations, explains over 80 % of the GPP variability across diverse ecosystems but fails to bring new information compared to reflectance alone at coarse spatial scales (~5 km). These findings have applications in agriculture and ecophysiological studies.
John T. Walker, Xi Chen, Zhiyong Wu, Donna Schwede, Ryan Daly, Aleksandra Djurkovic, A. Christopher Oishi, Eric Edgerton, Jesse Bash, Jennifer Knoepp, Melissa Puchalski, John Iiames, and Chelcy F. Miniat
Biogeosciences, 20, 971–995, https://doi.org/10.5194/bg-20-971-2023, https://doi.org/10.5194/bg-20-971-2023, 2023
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Better estimates of atmospheric nitrogen (N) deposition are needed to accurately assess ecosystem risk and impacts from deposition of nutrients and acidity. Using measurements and modeling, we estimate total N deposition of 6.7 kg N ha−1 yr−1 at a forest site in the southern Appalachian Mountains, a region sensitive to atmospheric deposition. Reductions in deposition of reduced forms of N (ammonia and ammonium) will be needed to meet the lowest estimates of N critical loads for the region.
Yi-Ying Chen and Sebastiaan Luyssaert
Biogeosciences, 20, 349–363, https://doi.org/10.5194/bg-20-349-2023, https://doi.org/10.5194/bg-20-349-2023, 2023
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Tropical cyclones are typically assumed to be associated with ecosystem damage. This study challenges this assumption and suggests that instead of reducing leaf area, cyclones in East Asia may increase leaf area by alleviating water stress.
Deborah F. McGlynn, Graham Frazier, Laura E. R. Barry, Manuel T. Lerdau, Sally E. Pusede, and Gabriel Isaacman-VanWertz
Biogeosciences, 20, 45–55, https://doi.org/10.5194/bg-20-45-2023, https://doi.org/10.5194/bg-20-45-2023, 2023
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Using a custom-made gas chromatography flame ionization detector, 2 years of speciated hourly biogenic volatile organic compound data were collected in a forest in central Virginia. We identify diurnal and seasonal variability in the data, which is shown to impact atmospheric oxidant budgets. A comparison with emission models identified discrepancies with implications for model outcomes. We suggest increased monitoring of speciated biogenic volatile organic compounds to improve modeled results.
Luke D. Schiferl, Jennifer D. Watts, Erik J. L. Larson, Kyle A. Arndt, Sébastien C. Biraud, Eugénie S. Euskirchen, Jordan P. Goodrich, John M. Henderson, Aram Kalhori, Kathryn McKain, Marikate E. Mountain, J. William Munger, Walter C. Oechel, Colm Sweeney, Yonghong Yi, Donatella Zona, and Róisín Commane
Biogeosciences, 19, 5953–5972, https://doi.org/10.5194/bg-19-5953-2022, https://doi.org/10.5194/bg-19-5953-2022, 2022
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As the Arctic rapidly warms, vast stores of thawing permafrost could release carbon dioxide (CO2) into the atmosphere. We combined observations of atmospheric CO2 concentrations from aircraft and a tower with observed CO2 fluxes from tundra ecosystems and found that the Alaskan North Slope in not a consistent source nor sink of CO2. Our study shows the importance of using both site-level and atmospheric measurements to constrain regional net CO2 fluxes and improve biogenic processes in models.
Pascal Wintjen, Frederik Schrader, Martijn Schaap, Burkhard Beudert, Richard Kranenburg, and Christian Brümmer
Biogeosciences, 19, 5287–5311, https://doi.org/10.5194/bg-19-5287-2022, https://doi.org/10.5194/bg-19-5287-2022, 2022
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For the first time, we compared four methods for estimating the annual dry deposition of total reactive nitrogen into a low-polluted forest ecosystem. In our analysis, we used 2.5 years of flux measurements, an in situ modeling approach, a large-scale chemical transport model (CTM), and canopy budget models. Annual nitrogen dry deposition budgets ranged between 4.3 and 6.7 kg N ha−1 a−1, depending on the applied method.
Michael Staudt, Juliane Daussy, Joseph Ingabire, and Nafissa Dehimeche
Biogeosciences, 19, 4945–4963, https://doi.org/10.5194/bg-19-4945-2022, https://doi.org/10.5194/bg-19-4945-2022, 2022
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We studied the short- and long-term effects of CO2 as a function of temperature on monoterpene emissions from holm oak. Similarly to isoprene, emissions decreased non-linearly with increasing CO2, with no differences among compounds and chemotypes. The CO2 response was modulated by actual leaf and growth temperature but not by growth CO2. Estimates of annual monoterpene release under double CO2 suggest that CO2 inhibition does not offset the increase in emissions due to expected warming.
Brendan Byrne, Junjie Liu, Yonghong Yi, Abhishek Chatterjee, Sourish Basu, Rui Cheng, Russell Doughty, Frédéric Chevallier, Kevin W. Bowman, Nicholas C. Parazoo, David Crisp, Xing Li, Jingfeng Xiao, Stephen Sitch, Bertrand Guenet, Feng Deng, Matthew S. Johnson, Sajeev Philip, Patrick C. McGuire, and Charles E. Miller
Biogeosciences, 19, 4779–4799, https://doi.org/10.5194/bg-19-4779-2022, https://doi.org/10.5194/bg-19-4779-2022, 2022
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Plants draw CO2 from the atmosphere during the growing season, while respiration releases CO2 to the atmosphere throughout the year, driving seasonal variations in atmospheric CO2 that can be observed by satellites, such as the Orbiting Carbon Observatory 2 (OCO-2). Using OCO-2 XCO2 data and space-based constraints on plant growth, we show that permafrost-rich northeast Eurasia has a strong seasonal release of CO2 during the autumn, hinting at an unexpectedly large respiration signal from soils.
Valery A. Isidorov and Andrej A. Zaitsev
Biogeosciences, 19, 4715–4746, https://doi.org/10.5194/bg-19-4715-2022, https://doi.org/10.5194/bg-19-4715-2022, 2022
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Biogenic volatile organic compounds (VOCs) play a critical role in earth-system processes: they are
main playersin the formation of tropospheric O3 and secondary aerosols, which have a significant impact on climate, human health and crops. A complex mixture of VOCs, formed as a result of physicochemical and biological processes, is released into the atmosphere from the forest floor. This review presents data on the composition of VOCs and contribution of various processes to their emissions.
David S. McLagan, Harald Biester, Tomas Navrátil, Stephan M. Kraemer, and Lorenz Schwab
Biogeosciences, 19, 4415–4429, https://doi.org/10.5194/bg-19-4415-2022, https://doi.org/10.5194/bg-19-4415-2022, 2022
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Spruce and larch trees are effective archiving species for historical atmospheric mercury using growth rings of bole wood. Mercury stable isotope analysis proved an effective tool to characterise industrial mercury signals and assess mercury uptake pathways (leaf uptake for both wood and bark) and mercury cycling within the trees. These data detail important information for understanding the mercury biogeochemical cycle particularly in forest systems.
Xin Yu, René Orth, Markus Reichstein, Michael Bahn, Anne Klosterhalfen, Alexander Knohl, Franziska Koebsch, Mirco Migliavacca, Martina Mund, Jacob A. Nelson, Benjamin D. Stocker, Sophia Walther, and Ana Bastos
Biogeosciences, 19, 4315–4329, https://doi.org/10.5194/bg-19-4315-2022, https://doi.org/10.5194/bg-19-4315-2022, 2022
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Identifying drought legacy effects is challenging because they are superimposed on variability driven by climate conditions in the recovery period. We develop a residual-based approach to quantify legacies on gross primary productivity (GPP) from eddy covariance data. The GPP reduction due to legacy effects is comparable to the concurrent effects at two sites in Germany, which reveals the importance of legacy effects. Our novel methodology can be used to quantify drought legacies elsewhere.
Anders Lindroth, Norbert Pirk, Ingibjörg S. Jónsdóttir, Christian Stiegler, Leif Klemedtsson, and Mats B. Nilsson
Biogeosciences, 19, 3921–3934, https://doi.org/10.5194/bg-19-3921-2022, https://doi.org/10.5194/bg-19-3921-2022, 2022
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We measured the fluxes of carbon dioxide and methane between a moist moss tundra and the atmosphere on Svalbard in order to better understand how such ecosystems are affecting the climate and vice versa. We found that the system was a small sink of carbon dioxide and a small source of methane. These fluxes are small in comparison with other tundra ecosystems in the high Arctic. Analysis of temperature sensitivity showed that respiration was more sensitive than photosynthesis above about 6 ℃.
Phillip Papastefanou, Christian S. Zang, Zlatan Angelov, Aline Anderson de Castro, Juan Carlos Jimenez, Luiz Felipe Campos De Rezende, Romina C. Ruscica, Boris Sakschewski, Anna A. Sörensson, Kirsten Thonicke, Carolina Vera, Nicolas Viovy, Celso Von Randow, and Anja Rammig
Biogeosciences, 19, 3843–3861, https://doi.org/10.5194/bg-19-3843-2022, https://doi.org/10.5194/bg-19-3843-2022, 2022
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The Amazon rainforest has been hit by multiple severe drought events. In this study, we assess the severity and spatial extent of the extreme drought years 2005, 2010 and 2015/16 in the Amazon. Using nine different precipitation datasets and three drought indicators we find large differences in drought stress across the Amazon region. We conclude that future studies should use multiple rainfall datasets and drought indicators when estimating the impact of drought stress in the Amazon region.
Haiyang Shi, Geping Luo, Olaf Hellwich, Mingjuan Xie, Chen Zhang, Yu Zhang, Yuangang Wang, Xiuliang Yuan, Xiaofei Ma, Wenqiang Zhang, Alishir Kurban, Philippe De Maeyer, and Tim Van de Voorde
Biogeosciences, 19, 3739–3756, https://doi.org/10.5194/bg-19-3739-2022, https://doi.org/10.5194/bg-19-3739-2022, 2022
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A number of studies have been conducted by using machine learning approaches to simulate carbon fluxes. We performed a meta-analysis of these net ecosystem exchange (NEE) simulations. Random forests and support vector machines performed better than other algorithms. Models with larger timescales had a lower accuracy. For different plant functional types (PFTs), there were significant differences in the predictors used and their effects on model accuracy.
Siqi Li, Wei Zhang, Xunhua Zheng, Yong Li, Shenghui Han, Rui Wang, Kai Wang, Zhisheng Yao, Chunyan Liu, and Chong Zhang
Biogeosciences, 19, 3001–3019, https://doi.org/10.5194/bg-19-3001-2022, https://doi.org/10.5194/bg-19-3001-2022, 2022
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The CNMM–DNDC model was modified to simulate ammonia volatilization (AV) from croplands. AV from cultivated uplands followed the first-order kinetics, which was jointly regulated by the factors of soil properties and meteorological conditions. AV simulation from rice paddy fields was improved by incorporating Jayaweera–Mikkelsen mechanisms. The modified model performed well in simulating the observed cumulative AV measured from 63 fertilization events in China.
Matthias Volk, Matthias Suter, Anne-Lena Wahl, and Seraina Bassin
Biogeosciences, 19, 2921–2937, https://doi.org/10.5194/bg-19-2921-2022, https://doi.org/10.5194/bg-19-2921-2022, 2022
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Because soils are an important sink for greenhouse gasses, we subjected sub-alpine grassland to a six-level climate change treatment.
Two independent methods showed that at warming > 1.5 °C the grassland ecosystem lost ca. 14 % or ca. 1 kg C m−2 in 5 years.
This shrinking of the terrestrial C sink implies a substantial positive feedback to the atmospheric greenhouse effect.
It is likely that this dramatic C loss is a transient effect before a new, climate-adjusted steady state is reached.
Johan A. Eckdahl, Jeppe A. Kristensen, and Daniel B. Metcalfe
Biogeosciences, 19, 2487–2506, https://doi.org/10.5194/bg-19-2487-2022, https://doi.org/10.5194/bg-19-2487-2022, 2022
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This study found climate to be a driving force for increasing per area emissions of greenhouse gases and removal of important nutrients from high-latitude forests due to wildfire. It used detailed direct measurements over a large area to uncover patterns and mechanisms of restructuring of forest carbon and nitrogen pools that are extrapolatable to larger regions. It also takes a step forward in filling gaps in global knowledge of northern forest response to climate-change-strengthened wildfires.
Sparkle L. Malone, Youmi Oh, Kyle A. Arndt, George Burba, Roisin Commane, Alexandra R. Contosta, Jordan P. Goodrich, Henry W. Loescher, Gregory Starr, and Ruth K. Varner
Biogeosciences, 19, 2507–2522, https://doi.org/10.5194/bg-19-2507-2022, https://doi.org/10.5194/bg-19-2507-2022, 2022
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To understand the CH4 flux potential of natural ecosystems and agricultural lands in the United States of America, a multi-scale CH4 observation network focused on CH4 flux rates, processes, and scaling methods is required. This can be achieved with a network of ground-based observations that are distributed based on climatic regions and land cover.
Bruna R. F. Oliveira, Jan J. Keizer, and Thomas Foken
Biogeosciences, 19, 2235–2243, https://doi.org/10.5194/bg-19-2235-2022, https://doi.org/10.5194/bg-19-2235-2022, 2022
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This study analyzes the impacts of this windthrow on the aerodynamic characteristics of zero-plane displacement and roughness length and, ultimately, their implications for the turbulent fluxes. The turbulent fluxes were only affected to a minor degree by the windthrow, but the footprint area of the flux tower changed markedly so that the target area of the measurements had to be redetermined.
Minttu Havu, Liisa Kulmala, Pasi Kolari, Timo Vesala, Anu Riikonen, and Leena Järvi
Biogeosciences, 19, 2121–2143, https://doi.org/10.5194/bg-19-2121-2022, https://doi.org/10.5194/bg-19-2121-2022, 2022
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The carbon sequestration potential of two street tree species and the soil beneath them was quantified with the urban land surface model SUEWS and the soil carbon model Yasso. The street tree plantings turned into a modest sink of carbon from the atmosphere after 14 years. Overall, the results indicate the importance of soil in urban carbon sequestration estimations, as soil respiration exceeded the carbon uptake in the early phase, due to the high initial carbon loss from the soil.
Jarmo Mäkelä, Laila Melkas, Ivan Mammarella, Tuomo Nieminen, Suyog Chandramouli, Rafael Savvides, and Kai Puolamäki
Biogeosciences, 19, 2095–2099, https://doi.org/10.5194/bg-19-2095-2022, https://doi.org/10.5194/bg-19-2095-2022, 2022
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Causal structure discovery algorithms have been making headway into Earth system sciences, and they can be used to increase our understanding on biosphere–atmosphere interactions. In this paper we present a procedure on how to utilize prior knowledge of the domain experts together with these algorithms in order to find more robust causal structure models. We also demonstrate how to avoid pitfalls such as over-fitting and concept drift during this process.
Makoto Saito, Tomohiro Shiraishi, Ryuichi Hirata, Yosuke Niwa, Kazuyuki Saito, Martin Steinbacher, Doug Worthy, and Tsuneo Matsunaga
Biogeosciences, 19, 2059–2078, https://doi.org/10.5194/bg-19-2059-2022, https://doi.org/10.5194/bg-19-2059-2022, 2022
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This study tested combinations of two sources of AGB data and two sources of LCC data and used the same burned area satellite data to estimate BB CO emissions. Our analysis showed large discrepancies in annual mean CO emissions and explicit differences in the simulated CO concentrations among the BB emissions estimates. This study has confirmed that BB emissions estimates are sensitive to the land surface information on which they are based.
Johannes Gensheimer, Alexander J. Turner, Philipp Köhler, Christian Frankenberg, and Jia Chen
Biogeosciences, 19, 1777–1793, https://doi.org/10.5194/bg-19-1777-2022, https://doi.org/10.5194/bg-19-1777-2022, 2022
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We develop a convolutional neural network, named SIFnet, that increases the spatial resolution of SIF from TROPOMI by a factor of 10 to a spatial resolution of 0.005°. SIFnet utilizes coarse SIF observations, together with a broad range of high-resolution auxiliary data. The insights gained from interpretable machine learning techniques allow us to make quantitative claims about the relationships between SIF and other common parameters related to photosynthesis.
Shihan Sun, Amos P. K. Tai, David H. Y. Yung, Anthony Y. H. Wong, Jason A. Ducker, and Christopher D. Holmes
Biogeosciences, 19, 1753–1776, https://doi.org/10.5194/bg-19-1753-2022, https://doi.org/10.5194/bg-19-1753-2022, 2022
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We developed and used a terrestrial biosphere model to compare and evaluate widely used empirical dry deposition schemes with different stomatal approaches and found that using photosynthesis-based stomatal approaches can reduce biases in modeled dry deposition velocities in current chemical transport models. Our study shows systematic errors in current dry deposition schemes and the importance of representing plant ecophysiological processes in models under a changing climate.
Ka Ming Fung, Maria Val Martin, and Amos P. K. Tai
Biogeosciences, 19, 1635–1655, https://doi.org/10.5194/bg-19-1635-2022, https://doi.org/10.5194/bg-19-1635-2022, 2022
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Fertilizer-induced ammonia detrimentally affects the environment by not only directly damaging ecosystems but also indirectly altering climate and soil fertility. To quantify these secondary impacts, we enabled CESM to simulate ammonia emission, chemical evolution, and deposition as a continuous cycle. If synthetic fertilizer use is to soar by 30 % from today's level, we showed that the counteracting impacts will increase the global ammonia emission by 3.3 Tg N per year.
Lena Wohlgemuth, Pasi Rautio, Bernd Ahrends, Alexander Russ, Lars Vesterdal, Peter Waldner, Volkmar Timmermann, Nadine Eickenscheidt, Alfred Fürst, Martin Greve, Peter Roskams, Anne Thimonier, Manuel Nicolas, Anna Kowalska, Morten Ingerslev, Päivi Merilä, Sue Benham, Carmen Iacoban, Günter Hoch, Christine Alewell, and Martin Jiskra
Biogeosciences, 19, 1335–1353, https://doi.org/10.5194/bg-19-1335-2022, https://doi.org/10.5194/bg-19-1335-2022, 2022
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Gaseous mercury is present in the atmosphere all over the globe. During the growing season, plants take up mercury from the air in a similar way as CO2. We investigated which factors impact this vegetational mercury uptake by analyzing a large dataset of leaf mercury uptake rates of trees in Europe. As a result, we conclude that mercury uptake is foremost controlled by tree-intrinsic traits like physiological activity but also by climatic factors like dry conditions in the air and in soils.
Junqi Wei, Xiaoyan Li, Lei Liu, Torben Røjle Christensen, Zhiyun Jiang, Yujun Ma, Xiuchen Wu, Hongyun Yao, and Efrén López-Blanco
Biogeosciences, 19, 861–875, https://doi.org/10.5194/bg-19-861-2022, https://doi.org/10.5194/bg-19-861-2022, 2022
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Although water availability has been linked to the response of ecosystem carbon (C) sink–source to climate warming, the mechanisms by which C uptake responds to soil moisture remain unclear. We explored how soil water and other environmental drivers modulate net C uptake in an alpine swamp meadow. Results reveal that nearly saturated soil conditions during warm seasons can help to maintain lower ecosystem respiration and therefore enhance the C sequestration capacity in this alpine swamp meadow.
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.
Cited articles
Ahlström, A., Raupach, M. R., Schurgers, G., Smith, B., Arneth, A., Jung,
M., Reichstein, M., Canadell, J. G., Friedlingstein, P., Jain, A. K., Kato, E.,
Poulter, B., Sitch, S., Stocker, B. D., Viovy, N., Wang, Y. P., Wiltshire, A.,
Zaehle, S., and Zeng, N.: The dominant role of semi-arid ecosystems in the trend
and variability of the land CO2 sink, Science, 348, 895–899, https://doi.org/10.1126/science.aaa1668, 2015.
Alados, C. L., Pueyo, Y., Barrantes, O., Escós, J., Giner, L., and Robles,
A.: Variations in landscape patterns and vegetation cover between 1957 and 1994
in a semiarid Mediterranean ecosystem, Landsc. Ecol., 19, 543–559, 2004.
Alados, C. L., Puigdefábregas, J., and Martínez-Fernández, J.:
Ecological and socio-economical thresholds of land and plant-community
degradation in semi-arid Mediterranean areas of southeastern Spain, J. Arid
Environ., 75, 1368–1376, 2011.
Bajocco, S., De Angelis, A., and Salvati, L.: A satellite-based green index
as a proxy for vegetation cover quality in a Mediterranean region, Ecol. Indicat.,
23, 578–587, 2012.
Baldocchi, D. D., Hincks, B. B., and Meyers, T. P.: Measuring biosphere–atmosphere
exchanges of biologically related gases with micrometeorological methods,
Ecology, 69, 1331–1340, 1988.
Berner, L. T., Law, B. E., and Hudiburg, T. W.: Water availability limits tree
productivity, carbon stocks, and carbon residence time in mature forests across
the western US, Biogeosciences, 14, 365–378, https://doi.org/10.5194/bg-14-365-2017, 2017.
Bown, H. E., Fuentes, J.-P., Perez-Quezada, J. F., and Franck, N.: Soil
respiration across a disturbance gradient in sclerophyllous ecosystems in
Central Chile, Ciencia e Investigación Agraria, 41, 89–106, 2014.
Cook, B. I., Smerdon, J. E., Seager, R., and Coats, S.: Global warming and
21st century drying, Clim. Dynam., 43, 2607–2627, https://doi.org/10.1007/s00382-014-2075-y, 2014.
del Barrio, G., Puigdefabregas, J., Sanjuan, M. E., Stellmes, M., and Ruiz, A.:
Assessment and monitoring of land condition in the Iberian Peninsula, 1989–2000,
Remote Sens. Environ., 114, 1817–1832, https://doi.org/10.1016/j.rse.2010.03.009, 2010.
Evans, S. E. and Wallenstein, M. D.: Climate change alters ecological strategies
of soil bacteria, Ecol. Lett., 17, 155–164, https://doi.org/10.1111/ele.12206, 2014.
Feng, S. and Fu, Q.: Expansion of global drylands under a warming climate,
Atmos. Chem. Phys., 13, 10081–10094, https://doi.org/10.5194/acp-13-10081-2013, 2013.
Feng, Q., Liu, W., Yanwu, Z., Jianhua, S., Yonghong, S., Zun Qiang, C., and
Haiyang, X.: Effect of climatic changes and human activity on soil carbon in
desertified regions of China, Tellus B, 58, 117–128, 2006.
Fensholt, R., Rasmussen, K., Kaspersen, P., Huber, S., Horion, S., and Swinnen,
E.: Assessing land degradation/recovery in the African Sahel from long-term
earth observation based primary productivity and precipitation relationships,
Remote Sensing, 5, 664–686, 2013.
Gao, X. and Giorgi, F.: Increased aridity in the Mediterranean region under
greenhouse gas forcing estimated from high resolution simulations with a
regional climate model, Global Planet. Change, 62, 195–209, https://doi.org/10.1016/j.gloplacha.2008.02.002, 2008.
Gilabert, M. A., Moreno, A., Maselli, F., Martínez, B., Chiesi, M.,
Sánchez-Ruiz, S., García-Haro, F. J., Pérez-Hoyos, A., Campos-Taberner,
M., Pérez-Priego, O., Serrano-Ortiz, P., and Carrara, A.: Daily GPP estimates
in Mediterranean ecosystems by combining remote sensing and meteorological data,
ISPRS J. Photogram. Remote Sens., 102, 184–197, https://doi.org/10.1016/j.isprsjprs.2015.01.017, 2015.
Grove, A. T. and Rackham, O.: The Nature of Mediterranean Europe. An Ecological
History, Yale University Press, New Haven, London, 2001.
Holling, C. S.: Resilience and Stability of Ecological Systems, Annu. Rev. Ecol.
System., 4, 1–23, 1973.
Hou, X., Wang, Z., Michael, S. P., Ji, L., and Yun, X.: The response of grassland
productivity, soil carbon content and soil respiration rates to different grazing
regimes in a desert steppe in northern China, Rangeland J., 36, 573–582, 2014.
Jongen, M., Pereira, J. S., Aires, L. M. I., and Pio, C. A.: The effects of
drought and timing of precipitation on the inter-annual variation in
ecosystem–atmosphere exchange in a Mediterranean grassland, Agr. Forest Meteorol.,
151, 595–606, 2011.
Kottek, M., Grieser, J., Beck, C., Rudolf, B., and Rubel, F.: World map of the
Köppen–Geiger climate classification updated, Meteorol. Z., 15, 259–263, 2006.
Kowalski, A. S., Serrano-Ortiz, P., Janssens, I. A., Sánchez-Moral, S.,
Cuezva, S., Domingo, F., Were, A., and Alados-Arboledas, L.: Can flux tower
research neglect geochemical CO2 exchange?, Agr. Forest Meteorol.,
148, 1045–1054, 2008.
Lal, R.: Potential of Desertification Control to Sequester Carbon and Mitigate
the Greenhouse Effect, Climatic Change, 51, 35–72, https://doi.org/10.1023/a:1017529816140, 2001.
Lasslop, G., Reichstein, M., Papale, D., Richardson, A. D., Arneth, A., Barr,
A., Stoy, P., and Wohlfahrt, G.: Separation of net ecosystem exchange into
assimilation and respiration using a light response curve approach: critical
issues and global evaluation, Global Change Biol., 16, 187–208,
https://doi.org/10.1111/j.1365-2486.2009.02041.x, 2010.
Lloyd, J. and Taylor, J.: On the temperature dependence of soil respiration,
Funct. Ecol., 8, 315–323, 1994.
López-Ballesteros, A., Serrano-Ortiz, P., Sánchez-Cañete, E. P.,
Oyonarte, C., Kowalski, A. S., Pérez-Priego, Ó., and Domingo, F.:
Enhancement of the net CO2 release of a semiarid grassland in SE Spain by
rain pulses, J. Geophys. Res.-Biogeo., 121, 52–66, https://doi.org/10.1002/2015jg003091, 2016.
López-Ballesteros, A., Serrano-Ortiz, P., Kowalski, A. S., Sánchez-Cañete,
E. P., Scott, R. L., and Domingo, F.: Subterranean ventilation of allochthonous
CO2 governs net CO2 exchange in a semiarid Mediterranean grassland,
Agr. Forest Meteorol., 234–235, 115–126, https://doi.org/10.1016/j.agrformet.2016.12.021, 2017.
Mainguet, M. and Da Silva, G.: Desertification and drylands development: what
can be done?, Land Degrad. Dev., 9, 375–382, 1998.
Mauder, M. and Foken, T.: Documentation and instruction manual of the eddy
covariance software package 324 TK3, Abt. Mikrometeorol., 46, 28–36, 2004.
Mbow, C., Brandt, M., Ouedraogo, I., de Leeuw, J., and Marshall, M.: What four
decades of earth observation tell us about land degradation in the Sahel?,
Remote Sensing, 7, 4048–4067, 2015.
Michaelis, L. and Menten, M. L.: Die Kinetik der Invertinwirkung, Biochem. Z.,
49, 333–369, 1913.
Moncrieff, J. B., Massheder, J. M., de Bruin, H., Elbers, J., Friborg, T.,
Heusinkveld, B., Kabat, P., Scott, S., Soegaard, H., and Verhoef, A.: A system
to measure surface fluxes of momentum, sensible heat, water vapour and carbon
dioxide, J. Hydrol., 188–189, 589–611, https://doi.org/10.1016/S0022-1694(96)03194-0, 1997.
Moreno-Mateos, D., Barbier, E. B., Jones, P. C., Jones, H. P., Aronson, J.,
López-López, J. A., McCrackin, M. L., Meli, P., Montoya, D., and
Rey Benayas, J. M.: Anthropogenic ecosystem disturbance and the recovery debt,
Nat. Commun., 8, 14163, https://doi.org/10.1038/ncomms14163, 2017.
Niemeijer, D., Puigdefabregas, J., White, R., Lal, R., Winslow, M., Ziedler, J.,
Prince, S., Archer, E., King, C.: Dryland Systems, in: Ecosystems and Human
Well-being: Current State and Trends, in: Vol. 1, Millennium Ecosystem Assessment
Series, Island Press, Washington, USA, 623–662, 2005.
Omuto, C.: A new approach for using time-series remote-sensing images to detect
changes in vegetation cover and composition in drylands: A case study of eastern
Kenya, Int. J. Remote Sens., 32, 6025–6045, 2011.
Omuto, C., Vargas, R., Alim, M., and Paron, P.: Mixed-effects modelling of time
series NDVI-rainfall relationship for detecting human-induced loss of vegetation
cover in drylands, J. Arid Environ., 74, 1552–1563, 2010.
Oyonarte, C., Rey, A., Raimundo, J., Miralles, I., and Escribano, P.: The use
of soil respiration as an ecological indicator in arid ecosystems of the SE of
Spain: Spatial variability and controlling factors, Ecol. Indicat., 14, 40–49,
https://doi.org/10.1016/j.ecolind.2011.08.013, 2012.
Pérez-Priego, O., Serrano-Ortiz, P., Sánchez-Cañete, E. P., Domingo,
F., and Kowalski, A. S.: Isolating the effect of subterranean ventilation on
CO2 emissions from drylands to the atmosphere, Agr. Forest Meteorol.,
180, 194–202, 2013.
Poulter, B., Frank, D., Ciais, P., Myneni, R. B., Andela, N., Bi, J., Broquet,
G., Canadell, J. G., Chevallier, F., Liu, Y. Y., Running, S. W., Sitch, S., and
Van Der Werf, G. R.: Contribution of semi-arid ecosystems to interannual
variability of the global carbon cycle, Nature, 509, 600–603, https://doi.org/10.1038/nature13376, 2014.
Prince, S., Becker-Reshef, I., and Rishmawi, K.: Detection and mapping of
long-term land degradation using local net production scaling: Application to
Zimbabwe, Remote Sens. Environ., 113, 1046–1057, 2009.
Pugnaire, F. I., Haase, P., Incoll, L. D., and Clark, S. C.: Response of the
tussock grass Stipa tenacissima to watering in a semi-arid environment, Funct.
Ecol., 10, 265–274, 1996.
Puigdefábregas, J. and Mendizabal, T.: Perspectives on desertification:
western Mediterranean, J. Arid Environ., 39, 209–224, 1998.
Puigdefabregas, J. and Mendizabal, T.: Prospects of desertification impacts in
western Europe, in: Environmental Challenges in the Mediterranean 2000–2050,
NATO Science Series, IV. Earth and environmental Sciences, edited by: Marquina,
A., Springer, Dordrecht, p. 155, 2004.
Reichstein, M., Falge, E., Baldocchi, D., Papale, D., Aubinet, M., Berbigier,
P., Bernhofer, C., Buchmann, N., Gilmanov, T., Granier, A., Grünwald, T.,
Havránková, K., Ilvesniemi, H., Janous, D., Knohl, A., Laurila, T.,
Lohila, A., Loustau, D., Matteucci, G., Meyers, T., Miglietta, F., Ourcival,
J.-M., Pumpanen, J., Rambal, S., Rotenberg, E., Sanz, M., Tenhunen, J., Seufert,
G., Vaccari, F., Vesala, T., Yakir, D., and Valentini, R.: On the separation of
net ecosystem exchange into assimilation and ecosystem respiration: review and
improved algorithm, Global Change Biol., 11, 1424–1439, https://doi.org/10.1111/j.1365-2486.2005.001002.x, 2005.
Reichstein, M., Bahn, M., Ciais, P., Frank, D., Mahecha, M. D., Seneviratne,
S. I., Zscheischler, J., Beer, C., Buchmann, N., Frank, D. C., Papale, D.,
Rammig, A., Smith, P., Thonicke, K., Van Der Velde, M., Vicca, S., Walz, A.,
and Wattenbach, M.: Climate extremes and the carbon cycle, Nature, 500, 287–295,
https://doi.org/10.1038/nature12350, 2013.
Rey, A., Pegoraro, E., Oyonarte, C., Were, A., Escribano, P., and Raimundo, J.:
Impact of land degradation on soil respiration in a steppe (Stipa tenacissima L.)
semi-arid ecosystem in the SE of Spain, Soil Biol. Biochem., 43, 393–403, 2011.
Rey, A., Belelli-Marchesini, L., Were, A., Serrano-ortiz, P., Etiope, G., Papale,
D., Domingo, F., and Pegoraro, E.: Wind as a main driver of the net ecosystem
carbon balance of a semiarid Mediterranean steppe in the South East of Spain,
Global Change Biol., 18, 539–554, https://doi.org/10.1111/j.1365-2486.2011.02534.x, 2012a.
Rey, A., Etiope, G., Belelli-Marchesini, L., Papale, D., and Valentini, R.: Geologic
carbon sources may confound ecosystem carbon balance estimates: Evidence from a
semiarid steppe in the southeast of Spain, J. Geophys. Res., 117, G03034,
https://doi.org/10.1029/2012JG001991, 2012b.
Rey, A., Oyonarte, C., Morán-López, T., Raimundo, J., and Pegoraro, E.:
Changes in soil moisture predict soil carbon losses upon rewetting in a perennial
semiarid steppe in SE Spain, Geoderma, 287, 135–146, https://doi.org/10.1016/j.geoderma.2016.06.025, 2017.
Rodríguez-Fernández, L. R., López-Olmedo, F., Oliveira, J. T.,
Medialdea, T., Terrinha, P., Matas, J., Martín-Serrano, A., Martín-Parra,
L. M., Rubio, F., Marín, C., Montes, M. and Nozal, F.: Mapa geológico
de la Península Ibérica, Baleares y Canarias a escala 1/1.000.000,
Instituto Geológico y Minero de España (IGME), National Institute of
Geography of Spain – IGME, http://mapas.igme.es/Servicios/default.aspx#IGME_Geologico_1M
(last access: December 2017), 2015.
Sánchez-Cañete, E. P., Kowalski, A. S., Serrano-Ortiz, P., Pérez-Priego,
O., and Domingo, F.: Deep CO2 soil inhalation/exhalation induced by synoptic
pressure changes and atmospheric tides in a carbonated semiarid steppe,
Biogeosciences, 10, 6591–6600, https://doi.org/10.5194/bg-10-6591-2013, 2013.
Schulz, K., Voigt, K., Beusch, C., Almeida-Cortez, J. S., Kowarik, I., Walz, A.,
and Cierjacks, A.: Grazing deteriorates the soil carbon stocks of Caatinga forest
ecosystems in Brazil, Forest Ecol. Manage., 367, 62–70, 2016.
Serrano-Ortiz, P., Oyonarte, C., Pérez-Priego, O., Reverter, B.,
Sánchez-Cañete, E. P., Were, A., Uclés, O., Morillas, L., and
Domingo, F.: Ecological functioning in grass–shrub Mediterranean ecosystems
measured by eddy covariance, Oecologia, 175, 1005–1017, https://doi.org/10.1007/s00442-014-2948-0, 2014.
Shoshany, M, and Karnibad, L.: Remote Sensing of Shrubland Drying in the
South-East Mediterranean, 1995–2010: Water-Use-Efficiency-Based Mapping of
Biomass Change, Remote Sensing, 7, 2283–2301, 2015.
Tang, J. and Baldocchi, D. D.: Spatial–temporal variation in soil respiration
in an oak–grass savanna ecosystem in California and its partitioning into
autotrophic and heterotrophic components, Biogeochemistry, 73, 183–207, 2005.
Thompson, M., Vlok, J., Rouget, M., Hoffman, M., Balmford, A., and Cowling, R.:
Mapping grazing-induced degradation in a semi-arid environment: a rapid and cost
effective approach for assessment and monitoring, Environ. Manage., 43, 585–596, 2009.
Uclés, O., Villagarcía, L., Moro, M. J., Canton, Y., and Domingo, F.:
Role of dewfall in the water balance of a semiarid coastal steppe ecosystem,
Hydrol. Process., 28, 2271–2280, https://doi.org/10.1002/hyp.9780, 2014.
UNCCD – United Nations Convention to Combat Desertification: General Assembly,
A/AC.241/27, http://www.unccd.int/Lists/SiteDocumentLibrary/conventionText/conv-eng.pdf
(last access: December 2016), 1994.
Wang, W., Guo, J., and Oikawa, T.: Contribution of root to soil respiration and
carbon balance in disturbed and undisturbed grassland communities, northeast
China, J. Biosci., 32, 375–384, 2007.
Watanabe, M. D. B. and Ortega, E.: Ecosystem services and biogeochemical cycles
on a global scale: valuation of water, carbon and nitrogen processes, Environ.
Sci. Policy, 14, 594–604, https://doi.org/10.1016/j.envsci.2011.05.013, 2011.
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