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294 results on '"Brümmer, Christian"'

1. Synthesis and Outlook on Future Research and Scientific Education in Southern Africa

Author

von Maltitz, Graham P., Midgley, Guy F., Veitch, Jennifer, Brümmer, Christian, Rötter, Reimund P., Rixen, Tim, Brandt, Peter, Veste, Maik, Canadell, Josep G., Series Editor, Díaz, Sandra, Series Editor, Heldmaier, Gerhard, Series Editor, Jackson, Robert B., Series Editor, Levia, Delphis F., Series Editor, Schulze, Ernst-Detlef, Series Editor, Sommer, Ulrich, Series Editor, Wardle, David A., Series Editor, von Maltitz, Graham P., editor, Midgley, Guy F., editor, Veitch, Jennifer, editor, Brümmer, Christian, editor, Rötter, Reimund P., editor, Viehberg, Finn A., editor, and Veste, Maik, editor

Published
2024
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2. Research Infrastructures as Anchor Points for Long-Term Environmental Observation

Author

Feig, Gregor, Brümmer, Christian, Maluleke, Amukelani, Midgley, Guy F., Canadell, Josep G., Series Editor, Díaz, Sandra, Series Editor, Heldmaier, Gerhard, Series Editor, Jackson, Robert B., Series Editor, Levia, Delphis F., Series Editor, Schulze, Ernst-Detlef, Series Editor, Sommer, Ulrich, Series Editor, Wardle, David A., Series Editor, von Maltitz, Graham P., editor, Midgley, Guy F., editor, Veitch, Jennifer, editor, Brümmer, Christian, editor, Rötter, Reimund P., editor, Viehberg, Finn A., editor, and Veste, Maik, editor

Published
2024
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3. A Fine Line Between Carbon Source and Sink: Potential CO2 Sequestration through Sustainable Grazing Management in the Nama-Karoo

Author

Rybchak, Oksana, du Toit, Justin, Maluleke, Amukelani, Bieri, Mari, Midgley, Guy F., Feig, Gregor, Brümmer, Christian, Canadell, Josep G., Series Editor, Díaz, Sandra, Series Editor, Heldmaier, Gerhard, Series Editor, Jackson, Robert B., Series Editor, Levia, Delphis F., Series Editor, Schulze, Ernst-Detlef, Series Editor, Sommer, Ulrich, Series Editor, Wardle, David A., Series Editor, von Maltitz, Graham P., editor, Midgley, Guy F., editor, Veitch, Jennifer, editor, Brümmer, Christian, editor, Rötter, Reimund P., editor, Viehberg, Finn A., editor, and Veste, Maik, editor

Published
2024
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4. Coupled Earth System and Human Processes: An Introduction to SPACES and the Book

Author

von Maltitz, Graham P., Bieri, Mari, Midgley, Guy F., Veitch, Jennifer, Brümmer, Christian, Rötter, Reimund P., Veste, Maik, Canadell, Josep G., Series Editor, Díaz, Sandra, Series Editor, Heldmaier, Gerhard, Series Editor, Jackson, Robert B., Series Editor, Levia, Delphis F., Series Editor, Schulze, Ernst-Detlef, Series Editor, Sommer, Ulrich, Series Editor, Wardle, David A., Series Editor, von Maltitz, Graham P., editor, Midgley, Guy F., editor, Veitch, Jennifer, editor, Brümmer, Christian, editor, Rötter, Reimund P., editor, Viehberg, Finn A., editor, and Veste, Maik, editor

Published
2024
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9. The effect of relative humidity on eddy covariance latent heat flux measurements and its implication for partitioning into transpiration and evaporation

Author

Zhang, Weijie, Jung, Martin, Migliavacca, Mirco, Poyatos, Rafael, Miralles, Diego G, El-Madany, Tarek S, Galvagno, Marta, Carrara, Arnaud, Arriga, Nicola, Ibrom, Andreas, Mammarella, Ivan, Papale, Dario, Cleverly, Jamie R, Liddell, Michael, Wohlfahrt, Georg, Markwitz, Christian, Mauder, Matthias, Paul-Limoges, Eugenie, Schmidt, Marius, Wolf, Sebastian, Brümmer, Christian, Arain, M Altaf, Fares, Silvano, Kato, Tomomichi, Ardö, Jonas, Oechel, Walter, Hanson, Chad, Korkiakoski, Mika, Biraud, Sébastien, Steinbrecher, Rainer, Billesbach, Dave, Montagnani, Leonardo, Woodgate, William, Shao, Changliang, Carvalhais, Nuno, Reichstein, Markus, and Nelson, Jacob A

Subjects
Earth Sciences, Atmospheric Sciences, Evapotranspiration, Energy balance closure, Latent energy, FLUXNET, Eddy covariance, Biological Sciences, Agricultural and Veterinary Sciences, Meteorology & Atmospheric Sciences, Agricultural, veterinary and food sciences, Biological sciences, Earth sciences
Abstract

While the eddy covariance (EC) technique is a well-established method for measuring water fluxes (i.e., evaporation or 'evapotranspiration’, ET), the measurement is susceptible to many uncertainties. One such issue is the potential underestimation of ET when relative humidity (RH) is high (>70%), due to low-pass filtering with some EC systems. Yet, this underestimation for different types of EC systems (e.g. open-path or closed-path sensors) has not been characterized for synthesis datasets such as the widely used FLUXNET2015 dataset. Here, we assess the RH-associated underestimation of latent heat fluxes (LE, or ET) from different EC systems for 163 sites in the FLUXNET2015 dataset. We found that the LE underestimation is most apparent during hours when RH is higher than 70%, predominantly observed at sites using closed-path EC systems, but the extent of the LE underestimation is highly site-specific. We then propose a machine learning based method to correct for this underestimation, and compare it to two energy balance closure based LE correction approaches (Bowen ratio correction, BRC, and attributing all errors to LE). Our correction increases LE by 189% for closed-path sites at high RH (>90%), while BRC increases LE by around 30% for all RH conditions. Additionally, we assess the influence of these corrections on ET-based transpiration (T) estimates using two different ET partitioning methods. Results show opposite responses (increasing vs. slightly decreasing T-to-ET ratios, T/ET) between the two methods when comparing T based on corrected and uncorrected LE. Overall, our results demonstrate the existence of a high RH bias in water fluxes in the FLUXNET2015 dataset and suggest that this bias is a pronounced source of uncertainty in ET measurements to be considered when estimating ecosystem T/ET and WUE.

Published
2023

10. Monitoring of carbon-water fluxes at Eurasian meteorological stations using random forest and remote sensing

Author

Xie, Mingjuan, Ma, Xiaofei, Wang, Yuangang, Li, Chaofan, Shi, Haiyang, Yuan, Xiuliang, Hellwich, Olaf, Chen, Chunbo, Zhang, Wenqiang, Zhang, Chen, Ling, Qing, Gao, Ruixiang, Zhang, Yu, Ochege, Friday Uchenna, Frankl, Amaury, De Maeyer, Philippe, Buchmann, Nina, Feigenwinter, Iris, Olesen, Jørgen E., Juszczak, Radoslaw, Jacotot, Adrien, Korrensalo, Aino, Pitacco, Andrea, Varlagin, Andrej, Shekhar, Ankit, Lohila, Annalea, Carrara, Arnaud, Brut, Aurore, Kruijt, Bart, Loubet, Benjamin, Heinesch, Bernard, Chojnicki, Bogdan, Helfter, Carole, Vincke, Caroline, Shao, Changliang, Bernhofer, Christian, Brümmer, Christian, Wille, Christian, Tuittila, Eeva-Stiina, Nemitz, Eiko, Meggio, Franco, Dong, Gang, Lanigan, Gary, Niedrist, Georg, Wohlfahrt, Georg, Zhou, Guoyi, Goded, Ignacio, Gruenwald, Thomas, Olejnik, Janusz, Jansen, Joachim, Neirynck, Johan, Tuovinen, Juha-Pekka, Zhang, Junhui, Klumpp, Katja, Pilegaard, Kim, Šigut, Ladislav, Klemedtsson, Leif, Tezza, Luca, Hörtnagl, Lukas, Urbaniak, Marek, Roland, Marilyn, Schmidt, Marius, Sutton, Mark A., Hehn, Markus, Saunders, Matthew, Mauder, Matthias, Aurela, Mika, Korkiakoski, Mika, Du, Mingyuan, Vendrame, Nadia, Kowalska, Natalia, Leahy, Paul G., Alekseychik, Pavel, Shi, Peili, Weslien, Per, Chen, Shiping, Fares, Silvano, Friborg, Thomas, Tallec, Tiphaine, Kato, Tomomichi, Sachs, Torsten, Maximov, Trofim, di Cella, Umberto Morra, Moderow, Uta, Li, Yingnian, He, Yongtao, Kosugi, Yoshiko, and Luo, Geping

Published
2023
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11. Joint optimization of land carbon uptake and albedo can help achieve moderate instantaneous and long-term cooling effects

Author

Graf, Alexander, Wohlfahrt, Georg, Aranda-Barranco, Sergio, Arriga, Nicola, Brümmer, Christian, Ceschia, Eric, Ciais, Philippe, Desai, Ankur R., Di Lonardo, Sara, Gharun, Mana, Grünwald, Thomas, Hörtnagl, Lukas, Kasak, Kuno, Klosterhalfen, Anne, Knohl, Alexander, Kowalska, Natalia, Leuchner, Michael, Lindroth, Anders, Mauder, Matthias, Migliavacca, Mirco, Morel, Alexandra C., Pfennig, Andreas, Poorter, Hendrik, Terán, Christian Poppe, Reitz, Oliver, Rebmann, Corinna, Sanchez-Azofeifa, Arturo, Schmidt, Marius, Šigut, Ladislav, Tomelleri, Enrico, Yu, Ke, Varlagin, Andrej, and Vereecken, Harry

Published
2023
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12. Assimilating Sentinel-2 data in a modified vegetation photosynthesis and respiration model (VPRM) to improve the simulation of croplands CO2 fluxes in Europe

Author

Bazzi, Hassan, Ciais, Philippe, Abbessi, Ezzeddine, Makowski, David, Santaren, Diego, Ceschia, Eric, Brut, Aurore, Tallec, Tiphaine, Buchmann, Nina, Maier, Regine, Acosta, Manuel, Loubet, Benjamin, Buysse, Pauline, Léonard, Joël, Bornet, Frédéric, Fayad, Ibrahim, Lian, Jinghui, Baghdadi, Nicolas, Segura Barrero, Ricard, Brümmer, Christian, Schmidt, Marius, Heinesch, Bernard, Mauder, Matthias, and Gruenwald, Thomas

Published
2024
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15. Author Correction: The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data.

Author

Pastorello, Gilberto, Trotta, Carlo, Canfora, Eleonora, Chu, Housen, Christianson, Danielle, Cheah, You-Wei, Poindexter, Cristina, Chen, Jiquan, Elbashandy, Abdelrahman, Humphrey, Marty, Isaac, Peter, Polidori, Diego, Reichstein, Markus, Ribeca, Alessio, van Ingen, Catharine, Vuichard, Nicolas, Zhang, Leiming, Amiro, Brian, Ammann, Christof, Arain, M Altaf, Ardö, Jonas, Arkebauer, Timothy, Arndt, Stefan K, Arriga, Nicola, Aubinet, Marc, Aurela, Mika, Baldocchi, Dennis, Barr, Alan, Beamesderfer, Eric, Marchesini, Luca Belelli, Bergeron, Onil, Beringer, Jason, Bernhofer, Christian, Berveiller, Daniel, Billesbach, Dave, Black, Thomas Andrew, Blanken, Peter D, Bohrer, Gil, Boike, Julia, Bolstad, Paul V, Bonal, Damien, Bonnefond, Jean-Marc, Bowling, David R, Bracho, Rosvel, Brodeur, Jason, Brümmer, Christian, Buchmann, Nina, Burban, Benoit, Burns, Sean P, Buysse, Pauline, Cale, Peter, Cavagna, Mauro, Cellier, Pierre, Chen, Shiping, Chini, Isaac, Christensen, Torben R, Cleverly, James, Collalti, Alessio, Consalvo, Claudia, Cook, Bruce D, Cook, David, Coursolle, Carole, Cremonese, Edoardo, Curtis, Peter S, D'Andrea, Ettore, da Rocha, Humberto, Dai, Xiaoqin, Davis, Kenneth J, De Cinti, Bruno, de Grandcourt, Agnes, De Ligne, Anne, De Oliveira, Raimundo C, Delpierre, Nicolas, Desai, Ankur R, Di Bella, Carlos Marcelo, di Tommasi, Paul, Dolman, Han, Domingo, Francisco, Dong, Gang, Dore, Sabina, Duce, Pierpaolo, Dufrêne, Eric, Dunn, Allison, Dušek, Jiří, Eamus, Derek, Eichelmann, Uwe, ElKhidir, Hatim Abdalla M, Eugster, Werner, Ewenz, Cacilia M, Ewers, Brent, Famulari, Daniela, Fares, Silvano, Feigenwinter, Iris, Feitz, Andrew, Fensholt, Rasmus, Filippa, Gianluca, Fischer, Marc, Frank, John, Galvagno, Marta, and Gharun, Mana

Abstract

The following authors were omitted from the original version of this Data Descriptor: Markus Reichstein and Nicolas Vuichard. Both contributed to the code development and N. Vuichard contributed to the processing of the ERA-Interim data downscaling. Furthermore, the contribution of the co-author Frank Tiedemann was re-evaluated relative to the colleague Corinna Rebmann, both working at the same sites, and based on this re-evaluation a substitution in the co-author list is implemented (with Rebmann replacing Tiedemann). Finally, two affiliations were listed incorrectly and are corrected here (entries 190 and 193). The author list and affiliations have been amended to address these omissions in both the HTML and PDF versions.

Published
2021

16. The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data.

Author

Pastorello, Gilberto, Trotta, Carlo, Canfora, Eleonora, Chu, Housen, Christianson, Danielle, Cheah, You-Wei, Poindexter, Cristina, Chen, Jiquan, Elbashandy, Abdelrahman, Humphrey, Marty, Isaac, Peter, Polidori, Diego, Reichstein, Markus, Ribeca, Alessio, van Ingen, Catharine, Vuichard, Nicolas, Zhang, Leiming, Amiro, Brian, Ammann, Christof, Arain, M Altaf, Ardö, Jonas, Arkebauer, Timothy, Arndt, Stefan K, Arriga, Nicola, Aubinet, Marc, Aurela, Mika, Baldocchi, Dennis, Barr, Alan, Beamesderfer, Eric, Marchesini, Luca Belelli, Bergeron, Onil, Beringer, Jason, Bernhofer, Christian, Berveiller, Daniel, Billesbach, Dave, Black, Thomas Andrew, Blanken, Peter D, Bohrer, Gil, Boike, Julia, Bolstad, Paul V, Bonal, Damien, Bonnefond, Jean-Marc, Bowling, David R, Bracho, Rosvel, Brodeur, Jason, Brümmer, Christian, Buchmann, Nina, Burban, Benoit, Burns, Sean P, Buysse, Pauline, Cale, Peter, Cavagna, Mauro, Cellier, Pierre, Chen, Shiping, Chini, Isaac, Christensen, Torben R, Cleverly, James, Collalti, Alessio, Consalvo, Claudia, Cook, Bruce D, Cook, David, Coursolle, Carole, Cremonese, Edoardo, Curtis, Peter S, D'Andrea, Ettore, da Rocha, Humberto, Dai, Xiaoqin, Davis, Kenneth J, Cinti, Bruno De, Grandcourt, Agnes de, Ligne, Anne De, De Oliveira, Raimundo C, Delpierre, Nicolas, Desai, Ankur R, Di Bella, Carlos Marcelo, Tommasi, Paul di, Dolman, Han, Domingo, Francisco, Dong, Gang, Dore, Sabina, Duce, Pierpaolo, Dufrêne, Eric, Dunn, Allison, Dušek, Jiří, Eamus, Derek, Eichelmann, Uwe, ElKhidir, Hatim Abdalla M, Eugster, Werner, Ewenz, Cacilia M, Ewers, Brent, Famulari, Daniela, Fares, Silvano, Feigenwinter, Iris, Feitz, Andrew, Fensholt, Rasmus, Filippa, Gianluca, Fischer, Marc, Frank, John, Galvagno, Marta, and Gharun, Mana

Abstract

The FLUXNET2015 dataset provides ecosystem-scale data on CO2, water, and energy exchange between the biosphere and the atmosphere, and other meteorological and biological measurements, from 212 sites around the globe (over 1500 site-years, up to and including year 2014). These sites, independently managed and operated, voluntarily contributed their data to create global datasets. Data were quality controlled and processed using uniform methods, to improve consistency and intercomparability across sites. The dataset is already being used in a number of applications, including ecophysiology studies, remote sensing studies, and development of ecosystem and Earth system models. FLUXNET2015 includes derived-data products, such as gap-filled time series, ecosystem respiration and photosynthetic uptake estimates, estimation of uncertainties, and metadata about the measurements, presented for the first time in this paper. In addition, 206 of these sites are for the first time distributed under a Creative Commons (CC-BY 4.0) license. This paper details this enhanced dataset and the processing methods, now made available as open-source codes, making the dataset more accessible, transparent, and reproducible.

Published
2020

20. Towards long-term standardised carbon and greenhouse gas observations for monitoring Europe’s terrestrial ecosystems: a review

Author

Franz, Daniela, Acosta, Manuel, Altimir, Núria, Arriga, Nicola, Arrouays, Dominique, Aubinet, Marc, Aurela, Mika, Ayres, Edward, López-Ballesteros, Ana, Barbaste, Mireille, Berveiller, Daniel, Biraud, Sébastien, Boukir, Hakima, Brown, Timothy, Brümmer, Christian, Buchmann, Nina, Burba, George, Carrara, Arnaud, Cescatti, Allessandro, Ceschia, Eric, Clement, Robert, Cremonese, Edoardo, Crill, Patrick, Darenova, Eva, Dengel, Sigrid, D’Odorico, Petra, Filippa, Gianluca, Fleck, Stefan, Fratini, Gerardo, Fuß, Roland, Gielen, Bert, Gogo, Sébastien, Grace, John, Graf, Alexander, Grelle, Achim, Gross, Patrick, Grünwald, Thomas, Haapanala, Sami, Hehn, Markus, Heinesch, Bernard, Heiskanen, Jouni, Herbst, Mathias, Herschlein, Christine, Hörtnagl, Lukas, Hufkens, Koen, Ibrom, Andreas, Jolivet, Claudy, Joly, Lilian, Jones, Michael, Kiese, Ralf, Klemedtsson, Leif, Kljun, Natascha, Klumpp, Katja, Kolari, Pasi, Kolle, Olaf, Kowalski, Andrew, Kutsch, Werner, Laurila, Tuomas, de Ligne, Anne, Linder, Sune, Lindroth, Anders, Lohila, Annalea, Longdoz, Bernhard, Mammarella, Ivan, Manise, Tanguy, Jiménez, Sara Maraňón, Matteucci, Giorgio, Mauder, Matthias, Meier, Philip, Merbold, Lutz, Mereu, Simone, Metzger, Stefan, Migliavacca, Mirco, Mölder, Meelis, Montagnani, Leonardo, Moureaux, Christine, Nelson, David, Nemitz, Eiko, Nicolini, Giacomo, Nilsson, Mats B, de Beeck, Maarten Op, Osborne, Bruce, Löfvenius, Mikaell Ottosson, Pavelka, Marian, Peichl, Matthias, Peltola, Olli, Pihlatie, Mari, Pitacco, Andrea, Pokorný, Radek, Pumpanen, Jukka, Ratié, Céline, Rebmann, Corinna, Roland, Marilyn, Sabbatini, Simone, Saby, Nicolas PA, Saunders, Matthew, Schmid, Hans Peter, Schrumpf, Marion, Sedlák, Pavel, and Ortiz, Penelope Serrano

Subjects
Agriculture, Land and Farm Management, Agricultural, Veterinary and Food Sciences, Climate Action, ICOS, GHG exchange, carbon cycle, standardised monitoring, observational network, Agronomy & Agriculture, Agriculture, land and farm management
Abstract

Research infrastructures play a key role in launching a new generation of integrated long-Term, geographically distributed observation programmes designed to monitor climate change, better understand its impacts on global ecosystems, and evaluate possible mitigation and adaptation strategies. The pan-European Integrated Carbon Observation System combines carbon and greenhouse gas (GHG; CO 2 , CH 4 , N 2 O, H 2 O) observations within the atmosphere, terrestrial ecosystems and oceans. High-precision measurements are obtained using standardised methodologies, are centrally processed and openly available in a traceable and verifiable fashion in combination with detailed metadata. The Integrated Carbon Observation System ecosystem station network aims to sample climate and land-cover variability across Europe. In addition to GHG flux measurements, a large set of complementary data (including management practices, vegetation and soil characteristics) is collected to support the interpretation, spatial upscaling and modelling of observed ecosystem carbon and GHG dynamics. The applied sampling design was developed and formulated in protocols by the scientific community, representing a trade-off between an ideal dataset and practical feasibility. The use of open-Access, high-quality and multi-level data products by different user communities is crucial for the Integrated Carbon Observation System in order to achieve its scientific potential and societal value.

Published
2018

21. Sustainability of Southern African Ecosystems under Global Change

Author

von Maltitz, Graham P., Midgley, Guy F., Veitch, Jennifer, Brümmer, Christian, Rötter, Reimund P., Viehberg, Finn A., and Veste, Maik

Subjects
Climate Change, Climate Change Impacts, Climate-Driven Changes, Climate Extremes, Ecosystems, Management Options, Management Strategies, SPACES II, Sustainability, thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAF Ecological science, the Biosphere, thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNK Conservation of the environment, thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNF Environmental management, thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNU Sustainability
Abstract

This open access book about the sustainability of marine and terrestrial ecosystems in southern Africa provides a synthesis of the research program Science Partnerships for the Adaptation to Complex Earth System Processes (SPACES II, 2018-2022). It addresses the scientific, social, and economic issues related to climate change, its potential impacts on the various ecosystems, adaptations, and management interventions for enhancing systems resilience in Southern Africa. It is written by numerous scientists from African states and Germany and summarizes the latest research findings, which are of great relevance for a better understanding of climate change impacts, adaptations, and vulnerabilities as well as for developing management options and policy options to reduce the associated risks. This is crucial considering that the projected African population increase is exceptional. Furthermore, climate change is assumed to hit southern Africa extremely hard with a significant increase in extreme events and the frequency of severe droughts, heat waves, and flooding. Southern Africa hosts a high variety of ecosystems, which belongs to important biodiversity hotspots for unique flora and fauna. The surrounding oceans form, in turn, a bottle neck within the ocean’s global thermohaline circulation, act as a still poorly understood carbon sink and source and play an important role for fisheries as they are highly productive. Considering these important aspects, the book is an important interdisciplinary contribution to the scientific literature and will find a wide readership. The book is aimed at students, teachers, and scientists in the fields of terrestrial and marine ecology, environmental, nature and landscape planning, agriculture, environmental and resource management, biodiversity, and nature conservation, as well as scientists and representatives in specialised authorities and associations, nature conservationists, and policy makers of related disciplines.

Published
2024
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22. Altered energy partitioning across terrestrial ecosystems in the European drought year 2018

Author

Graf, Alexander, Klosterhalfen, Anne, Arriga, Nicola, Bernhofer, Christian, Bogena, Heye, Bornet, Frédéric, Brüggemann, Nicolas, Brümmer, Christian, Buchmann, Nina, Chi, Jinshu, Chipeaux, Christophe, Cremonese, Edoardo, Cuntz, Matthias, Dušek, Jiří, El-Madany, Tarek S., Fares, Silvano, Fischer, Milan, Foltýnová, Lenka, Gharun, Mana, Ghiasi, Shiva, Gielen, Bert, Gottschalk, Pia, Grünwald, Thomas, Heinemann, Günther, Heinesch, Bernard, Heliasz, Michal, Holst, Jutta, Hörtnagl, Lukas, Ibrom, Andreas, Ingwersen, Joachim, Jurasinski, Gerald, Klatt, Janina, Knohl, Alexander, Koebsch, Franziska, Konopka, Jan, Korkiakoski, Mika, Kowalska, Natalia, Kremer, Pascal, Kruijt, Bart, Lafont, Sebastien, Léonard, Joël, De Ligne, Anne, Longdoz, Bernard, Loustau, Denis, Magliulo, Vincenzo, Mammarella, Ivan, Manca, Giovanni, Mauder, Matthias, Migliavacca, Mirco, Mölder, Meelis, Neirynck, Johan, Ney, Patrizia, Nilsson, Mats, Paul-Limoges, Eugénie, Peichl, Matthias, Pitacco, Andrea, Poyda, Arne, Rebmann, Corinna, Roland, Marilyn, Sachs, Torsten, Schmidt, Marius, Schrader, Frederik, Siebicke, Lukas, Šigut, Ladislav, Tuittila, Eeva-Stiina, Varlagin, Andrej, Vendrame, Nadia, Vincke, Caroline, Völksch, Ingo, Weber, Stephan, Wille, Christian, Wizemann, Hans-Dieter, Zeeman, Matthias, and Vereecken, Harry

Published
2020

23. Sensitivity of gross primary productivity to climatic drivers during the summer drought of 2018 in Europe

Author

Fu, Zheng, Ciais, Philippe, Bastos, Ana, Stoy, Paul C., Yang, Hui, Green, Julia K., Wang, Bingxue, Yu, Kailiang, Huang, Yuanyuan, Knohl, Alexander, Šigut, Ladislav, Gharun, Mana, Cuntz, Matthias, Arriga, Nicola, Roland, Marilyn, Peichl, Matthias, Migliavacca, Mirco, Cremonese, Edoardo, Varlagin, Andrej, Brümmer, Christian, de la Motte, Louis Gourlez, Fares, Silvano, Buchmann, Nina, El-Madany, Tarek S., Pitacco, Andrea, Vendrame, Nadia, Li, Zhaolei, Vincke, Caroline, Magliulo, Enzo, and Koebsch, Franziska

Published
2020

25. ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales

Author

Qiu, Chunjing, Zhu, Dan, Ciais, Philippe, Guenet, Bertrand, Krinner, Gerhard, Peng, Shushi, Aurela, Mika, Bernhofer, Christian, Brümmer, Christian, Bret-Harte, Syndonia, Chu, Housen, Chen, Jiquan, Desai, Ankur R, Dušek, Jiří, Euskirchen, Eugénie S, Fortuniak, Krzysztof, Flanagan, Lawrence B, Friborg, Thomas, Grygoruk, Mateusz, Gogo, Sébastien, Grünwald, Thomas, Hansen, Birger U, Holl, David, Humphreys, Elyn, Hurkuck, Miriam, Kiely, Gerard, Klatt, Janina, Kutzbach, Lars, Largeron, Chloé, Laggoun-Défarge, Fatima, Lund, Magnus, Lafleur, Peter M, Li, Xuefei, Mammarella, Ivan, Merbold, Lutz, Nilsson, Mats B, Olejnik, Janusz, Ottosson-Löfvenius, Mikaell, Oechel, Walter, Parmentier, Frans-Jan W, Peichl, Matthias, Pirk, Norbert, Peltola, Olli, Pawlak, Włodzimierz, Rasse, Daniel, Rinne, Janne, Shaver, Gaius, Schmid, Hans Peter, Sottocornola, Matteo, Steinbrecher, Rainer, Sachs, Torsten, Urbaniak, Marek, Zona, Donatella, and Ziemblinska, Klaudia

Subjects
Earth Sciences, Atmospheric Sciences, Earth sciences
Abstract

Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO2 fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a global peatland map and identified with peat-specific soil hydraulic properties. Runoff from non-peat vegetation within a grid cell containing a fraction of peat is routed to this peat soil tile, which maintains shallow water tables. The water table position separates oxic from anoxic decomposition. The model was evaluated against eddy-covariance (EC) observations from 30 northern peatland sites, with the maximum rate of carboxylation (Vcmax) being optimized at each site. Regarding short-term day-to-day variations, the model performance was good for gross primary production (GPP) (r2 Combining double low line 0.76; Nash-Sutcliffe modeling efficiency, MEF Combining double low line 0.76) and ecosystem respiration (ER, r2 Combining double low line 0.78, MEF Combining double low line 0.75), with lesser accuracy for latent heat fluxes (LE, r2 Combining double low line 0.42, MEF Combining double low line 0.14) and and net ecosystem CO2 exchange (NEE, r2 Combining double low line 0.38, MEF Combining double low line 0.26). Seasonal variations in GPP, ER, NEE, and energy fluxes on monthly scales showed moderate to high r2 values (0.57-0.86). For spatial across-site gradients of annual mean GPP, ER, NEE, and LE, r2 values of 0.93, 0.89, 0.27, and 0.71 were achieved, respectively. Water table (WT) variation was not well predicted (r2

Published
2018

26. X-BASE: the first terrestrial carbon and water flux products from an extended data-driven scaling framework, FLUXCOM-X

Author

Nelson, Jacob A., primary, Walther, Sophia, additional, Gans, Fabian, additional, Kraft, Basil, additional, Weber, Ulrich, additional, Novick, Kimberly, additional, Buchmann, Nina, additional, Migliavacca, Mirco, additional, Wohlfahrt, Georg, additional, Šigut, Ladislav, additional, Ibrom, Andreas, additional, Papale, Dario, additional, Göckede, Mathias, additional, Duveiller, Gregory, additional, Knohl, Alexander, additional, Hörtnagl, Lukas, additional, Scott, Russell L., additional, Zhang, Weijie, additional, Hamdi, Zayd Mahmoud, additional, Reichstein, Markus, additional, Aranda-Barranco, Sergio, additional, Ardö, Jonas, additional, Op de Beeck, Maarten, additional, Billdesbach, Dave, additional, Bowling, David, additional, Bracho, Rosvel, additional, Brümmer, Christian, additional, Camps-Valls, Gustau, additional, Chen, Shiping, additional, Cleverly, Jamie Rose, additional, Desai, Ankur, additional, Dong, Gang, additional, El-Madany, Tarek S., additional, Euskirchen, Eugenie Susanne, additional, Feigenwinter, Iris, additional, Galvagno, Marta, additional, Gerosa, Giacomo, additional, Gielen, Bert, additional, Goded, Ignacio, additional, Goslee, Sarah, additional, Gough, Christopher Michael, additional, Heinesch, Bernard, additional, Ichii, Kazuhito, additional, Jackowicz-Korczynski, Marcin Antoni, additional, Klosterhalfen, Anne, additional, Knox, Sara, additional, Kobayashi, Hideki, additional, Kohonen, Kukka-Maaria, additional, Korkiakoski, Mika, additional, Mammarella, Ivan, additional, Mana, Gharun, additional, Marzuoli, Riccardo, additional, Matamala, Roser, additional, Metzger, Stefan, additional, Montagnani, Leonardo, additional, Nicolini, Giacomo, additional, O'Halloran, Thomas, additional, Ourcival, Jean-Marc, additional, Peichl, Matthias, additional, Pendall, Elise, additional, Ruiz Reverter, Borja, additional, Roland, Marilyn, additional, Sabbatini, Simone, additional, Sachs, Torsten, additional, Schmidt, Marius, additional, Schwalm, Christopher R., additional, Shekhar, Ankit, additional, Silberstein, Richard, additional, Silveira, Maria Lucia, additional, Spano, Donatella, additional, Tagesson, Torbern, additional, Tramontana, Gianluca, additional, Trotta, Carlo, additional, Turco, Fabio, additional, Vesala, Timo, additional, Vincke, Caroline, additional, Vitale, Domenico, additional, Vivoni, Enrique R., additional, Wang, Yi, additional, Woodgate, William, additional, Yepez, Enrico A., additional, Zhang, Junhui, additional, Zona, Donatella, additional, and Jung, Martin, additional

Published
2024
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28. Temperature thresholds of ecosystem respiration at a global scale

Author

Johnston, Alice S. A., Meade, Andrew, Ardö, Jonas, Arriga, Nicola, Black, Andy, Blanken, Peter D., Bonal, Damien, Brümmer, Christian, Cescatti, Alessandro, Dušek, Jiří, Graf, Alexander, Gioli, Beniamino, Goded, Ignacio, Gough, Christopher M., Ikawa, Hiroki, Jassal, Rachhpal, Kobayashi, Hideki, Magliulo, Vincenzo, Manca, Giovanni, Montagnani, Leonardo, Moyano, Fernando E., Olesen, Jørgen E., Sachs, Torsten, Shao, Changliang, Tagesson, Torbern, Wohlfahrt, Georg, Wolf, Sebastian, Woodgate, William, Varlagin, Andrej, and Venditti, Chris

Published
2021
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30. Standards and Open Access are the ICOS Pillars: Reply to “Comments on ‘The Integrated Carbon Observation System in Europe’”

Author

Papale, Dario, primary, Heiskanen, Jouni, additional, Brümmer, Christian, additional, Buchmann, Nina, additional, Calfapietra, Carlo, additional, Carrara, Arnaud, additional, Chen, Huilin, additional, Gielen, Bert, additional, Gkritzalis, Thanos, additional, Hammer, Samuel, additional, Hartman, Susan, additional, Herbst, Mathias, additional, Janssens, Ivan A., additional, Jordan, Armin, additional, Juurola, Eija, additional, Karstens, Ute, additional, Kasurinen, Ville, additional, Kruijt, Bart, additional, Lankreijer, Harry, additional, Levin, Ingeborg, additional, Linderson, Maj-Lena, additional, Loustau, Denis, additional, Merbold, Lutz, additional, Myhre, Cathrine Lund, additional, Pavelka, Marian, additional, Pilegaard, Kim, additional, Ramonet, Michel, additional, Rebmann, Corinna, additional, Rinne, Janne, additional, Rivier, Léonard, additional, Saltikoff, Elena, additional, Sanders, Richard, additional, Steinbacher, Martin, additional, Steinhoff, Tobias, additional, Watson, Andrew, additional, Vermeulen, Alex T., additional, Vesala, Timo, additional, Vítková, Gabriela, additional, and Kutsch, Werner, additional

Published
2023
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33. Linking scales and disciplines: an interdisciplinary cross-scale approach to supporting climate-relevant ecosystem management

Author

Berger, Christian, Bieri, Mari, Bradshaw, Karen, Brümmer, Christian, Clemen, Thomas, Hickler, Thomas, Kutsch, Werner Leo, Lenfers, Ulfia A., Martens, Carola, Midgley, Guy F., Mukwashi, Kanisios, Odipo, Victor, Scheiter, Simon, Schmullius, Christiane, Baade, Jussi, du Toit, Justin C. O., Scholes, Robert J., Smit, Izak P. J., Stevens, Nicola, and Twine, Wayne

Published
2019
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34. The effect of relative humidity on eddy covariance latent heat flux measurements and its implication for partitioning into transpiration and evaporation

Author

Zhang, Weijie, primary, Jung, Martin, additional, Migliavacca, Mirco, additional, Poyatos, Rafael, additional, Miralles, Diego G., additional, El-Madany, Tarek S., additional, Galvagno, Marta, additional, Carrara, Arnaud, additional, Arriga, Nicola, additional, Ibrom, Andreas, additional, Mammarella, Ivan, additional, Papale, Dario, additional, Cleverly, Jamie R., additional, Liddell, Michael, additional, Wohlfahrt, Georg, additional, Markwitz, Christian, additional, Mauder, Matthias, additional, Paul-Limoges, Eugenie, additional, Schmidt, Marius, additional, Wolf, Sebastian, additional, Brümmer, Christian, additional, Arain, M. Altaf, additional, Fares, Silvano, additional, Kato, Tomomichi, additional, Ardö, Jonas, additional, Oechel, Walter, additional, Hanson, Chad, additional, Korkiakoski, Mika, additional, Biraud, Sébastien, additional, Steinbrecher, Rainer, additional, Billesbach, Dave, additional, Montagnani, Leonardo, additional, Woodgate, William, additional, Shao, Changliang, additional, Carvalhais, Nuno, additional, Reichstein, Markus, additional, and Nelson, Jacob A., additional

Published
2023
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38. Field Spectroscopy versus GPP. A test case using JB Devices at flux sites.

Author

Julitta, Tommaso, primary, Burkart, Andreas, additional, Colombo, Roberto, additional, Cremonese, Edoardo, additional, Damm, Alexander, additional, Dondina, Olivia, additional, El-Madany, Tarek, additional, Griessbaum, Frank, additional, Miller, Bill, additional, Burba, George, additional, Kittler, Fanny, additional, Migliavacca, Mirco, additional, Rascher, Uwe, additional, Roland, Marilyn, additional, Rossini, Micol, additional, Brümmer, Christian, additional, Schuettemeyer, Dirk, additional, Segers, Jan, additional, Wohlfahrt, Georg, additional, and Papale, Dario, additional

Published
2023
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41. 4D-Var Inversion of European NH Emissions Using CrIS NH Measurements and GEOS-Chem Adjoint With Bi-Directional and Uni-Directional Flux Schemes

Author

Cao, Hansen, Henze, Daven K, Zhu, Liye, Shephard, Mark W, Cady-Pereira, Karen, Dammers, Enrico, Sitwell, Michael, Heath, Nicholas, Lonsdale, Chantelle, Bash, Jesse O, Miyazaki, Kazuyuki, Flechard, Christophe, Fauvel, Yannick, Kruit, Roy Wichink, Feigenspan, Stefan, Brümmer, Christian, Schrader, Frederik, Twigg, Marsailidh M, Leeson, Sarah, Tang, Yuk S, Stephens, Amy C M, Braban, Christine, Vincent, Keith, Meier, Mario, Seitler, Eva, Geels, Camilla, Ellermann, Thomas, Sanocka, Agnieszka, and Capps, Shannon L

Subjects
bi‐directional flux scheme, CrIS NH3, 4D‐Var, inverse modeling, NH3 emissions, uni‐directional flux scheme
Abstract

We conduct the first 4D-Var inversion of NH3 accounting for NH3 bi-directional flux, using CrIS satellite NH3 observations over Europe in 2016. We find posterior NH3 emissions peak more in springtime than prior emissions at continental to national scales, and annually they are generally smaller than the prior emissions over central Europe, but larger over most of the rest of Europe. Annual posterior anthropogenic NH3 emissions for 25 European Union members (EU25) are 25% higher than the prior emissions and very close (

Published
2023

46. Technical note: A view from space on global flux towers by MODIS and Landsat: the FluxnetEO data set

Author

Walther, Sophia, primary, Besnard, Simon, additional, Nelson, Jacob Allen, additional, El-Madany, Tarek Sebastian, additional, Migliavacca, Mirco, additional, Weber, Ulrich, additional, Carvalhais, Nuno, additional, Ermida, Sofia Lorena, additional, Brümmer, Christian, additional, Schrader, Frederik, additional, Prokushkin, Anatoly Stanislavovich, additional, Panov, Alexey Vasilevich, additional, and Jung, Martin, additional

Published
2022
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47. 4D‐Var Inversion of European NH3 Emissions Using CrIS NH3 Measurements and GEOS‐Chem Adjoint With Bi‐Directional and Uni‐Directional Flux Schemes

Author

Cao, Hansen, primary, Henze, Daven K., additional, Zhu, Liye, additional, Shephard, Mark W., additional, Cady‐Pereira, Karen, additional, Dammers, Enrico, additional, Sitwell, Michael, additional, Heath, Nicholas, additional, Lonsdale, Chantelle, additional, Bash, Jesse O., additional, Miyazaki, Kazuyuki, additional, Flechard, Christophe, additional, Fauvel, Yannick, additional, Kruit, Roy Wichink, additional, Feigenspan, Stefan, additional, Brümmer, Christian, additional, Schrader, Frederik, additional, Twigg, Marsailidh M., additional, Leeson, Sarah, additional, Tang, Yuk S., additional, Stephens, Amy C. M., additional, Braban, Christine, additional, Vincent, Keith, additional, Meier, Mario, additional, Seitler, Eva, additional, Geels, Camilla, additional, Ellermann, Thomas, additional, Sanocka, Agnieszka, additional, and Capps, Shannon L., additional

Published
2022
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48. WMO Air Quality and Climate Bulletin No. 2

Author

Andrews, Elisabeth, Bell, Michael, Brümmer, Christian, Coen, Martine Collaud, Cooper, Owen R., Cromar, Kevin, Fagerli, Hilde, Flemming, Johannes, Klenner, Laura Gallardo, Gladson, Laura, Knowland, Emma, Munoz-Alpizar, Rodrigo, Parrington, Mark, Pavlovic, Radenko, Vincent-Henri Peuch, Scheuschner, Thomas, Jianlin Shen, Sokhi, Ranjeet S., Targino, Ad Créso, Turnock, Steven, and Walker, John

Published
2022
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49. The Integrated Carbon Observation System in Europe

Author

Heiskanen, Jouni, Brümmer, Christian, Buchmann, Nina, Calfapietra, Carlo, Chen, Huilin, Gielen, Bert, Gkritzalis, Thanos, Hammer, Samuel, Hartman, Susan, Herbst, Mathias, Janssens, Ivan A., Jordan, Armin, Juurola, Eija, Karstens, Ute, Kasurinen, Ville, Kruijt, Bart, Lankreijer, Harry, Levin, Ingeborg, Linderson, Maj-Lena, Loustau, Denis, and Merbold, Lutz

Abstract

Since 1750, land use change and fossil fuel combustion has led to a 46 % increase in the atmospheric carbon dioxide (CO2) concentrations, causing global warming with substantial societal consequences. The Paris Agreement aims to limiting global temperature increases to well below 2°C above pre-industrial levels. Increasing levels of CO2 and other greenhouse gases (GHGs), such as methane (CH4) and nitrous oxide (N2O), in the atmosphere are the primary cause of climate change. Approximately half of the carbon emissions to the atmosphere is sequestered by ocean and land sinks, leading to ocean acidification but also slowing the rate of global warming. However, there are significant uncertainties in the future global warming scenarios due to uncertainties in the size, nature and stability of these sinks. Quantifying and monitoring the size and timing of natural sinks and the impact of climate change on ecosystems are important information to guide policy-makers’ decisions and strategies on reductions in emissions. Continuous, long-term observations are required to quantify GHG emissions, sinks, and their impacts on Earth systems. The Integrated Carbon Observation System (ICOS) was designed as the European in situ observation and information system to support science and society in their efforts to mitigate climate change. It provides standardized and open data currently from over 140 measurement stations across 12 European countries. The stations observe GHG concentrations in the atmosphere and carbon and GHG fluxes between the atmosphere, land surface and the oceans. This article describes how ICOS fulfills its mission to harmonize these observations, ensure the related long-term financial commitments, provide easy access to well-documented and reproducible high-quality data and related protocols and tools for scientific studies, and deliver information and GHG-related products to stakeholders in society and policy., Bulletin of the American Meteorological Society, 103 (3), ISSN:0003-0007, ISSN:1520-0477

Published
2022
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50. How climate and vegetation type influence evapotranspiration and water use efficiency in Canadian forest, peatland and grassland ecosystems

Author

Brümmer, Christian, Black, T. Andrew, Jassal, Rachhpal S., Grant, Nicholas J., Spittlehouse, David L., Chen, Baozhang, Nesic, Zoran, Amiro, Brian D., Arain, M. Altaf, Barr, Alan G., Bourque, Charles P.-A., Coursolle, Carole, Dunn, Allison L., Flanagan, Lawrence B., Humphreys, Elyn R., Lafleur, Peter M., Margolis, Hank A., McCaughey, J. Harry, and Wofsy, Steven C.

Published
2012
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