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Climate control of terrestrial carbon exchange across biomes and continents

2010; IOP Publishing; Volume: 5; Issue: 3 Linguagem: Inglês

10.1088/1748-9326/5/3/034007

1748-9326

Chuixiang Yi, D. M. Ricciuto, Runze Li, John Wolbeck, Xiyan Xu, Mats B. Nilsson, Luís Aires, J. D. Albertson, Christof Ammann, M. Altaf Arain, Alessandro Araújo, Marc Aubinet, Mika Aurela, Zoltán Barcza, Alan Barr, Paul Berbigier, Jason Beringer, Christian Bernhofer, T. Andrew Black, Paul V. Bolstad, Fred C. Bosveld, M. S. J. Broadmeadow, Nina Buchmann, Sean P. Burns, Pierre Cellier, Jingming Chen, Jiquan Chen, Philippe Ciais, Robert Clement, Bruce D. Cook, Peter S. Curtis, D. B. Dail, Ebba Dellwik, Nicolas Delpierre, Ankur R. Desai, Sabina Dore, D. Dragoni, Bert G. Drake, Éric Dufrêne, Allison L. Dunn, J.A. Elbers, Werner Eugster, M. Falk, Christian Feigenwinter, Lawrence B. Flanagan, Thomas Foken, J. M. Frank, J. Fuhrer, Damiano Gianelle, A. H. Goldstein, Mike Goulden, André Granier, Thomas Grünwald, Lianhong Gu, Haiqiang Guo, Albin Hammerle, Shijie Han, Niall P. Hanan, László Haszpra, Bernard Heinesch, Carole Helfter, Dimmie Hendriks, Lindsay B. Hutley, Andreas Ibrom, C.M.J. Jacobs, Torbjörn Johansson, Marjan Jongen, Gabriel G. Katul, Gerard Kiely, Katja Klumpp, Alexander Knohl, Thomas E. Kolb, Werner L. Kutsch, Peter M. Lafleur, Tuomas Laurila, R. Leuning, Anders Lindroth, Heping Liu, Benjamin Loubet, Giovanni Manca, Michal V. Marek, Hank A. Margolis, Timothy A. Martin, W. J. Massman, Roser Matamala, Gioṙgio Matteucci, Harry McCaughey, Lutz Merbold, Tilden Meyers, Mirco Migliavacca, F. Miglietta, Laurent Misson, Meelis Mölder, John Moncrieff, Russell K. Monson, Leonardo Montagnani, M. Montes‐Helu, Eddy Moors, Christine Moureaux, M. M. Mukelabai, J. William Munger, M. Myklebust, Zoltán Nagy, Asko Noormets, Walter C. Oechel, Ram Oren, Stephen G. Pallardy, K.T. Paw U, J. S. Pereira, Kim Pilegaard, Krisztina Pintér, Casimiro Pio, Gabriel Pita, Thomas L. Powell, Serge Rambal, James T. Randerson, Celso von Randow, Corinna Rebmann, Janne Rinne, Federica Rossi, Nigel T. Roulet, Ronald J. Ryel, Jörgen Sagerfors, Nobuko Saigusa, María José Sanz, G Scarascia Mugnozza, Hans Peter Schmid, G. Seufert, Mario Siqueira, Jean‐François Soussana, Gregory Starr, Mark A. Sutton, John Tenhunen, Zoltán Tuba, Juha‐Pekka Tuovinen, Riccardo Valentini, Christoph S. Vogel, Jingxin Wang, Shaoqiang Wang, Weiguo Wang, L. R. Welp, Xuefa Wen, Sonia Wharton, Matthew Wilkinson, C. A. Williams, Georg Wohlfahrt, Susumu Yamamoto, Guirui Yu, Roberto Zampedri, Bin Zhao, Xinquan Zhao,

Climate variability and models

Understanding the relationships between climate and carbon exchange by terrestrial ecosystems is critical to predict future levels of atmospheric carbon dioxide because of the potential accelerating effects of positive climate–carbon cycle feedbacks. However, directly observed relationships between climate and terrestrial CO2 exchange with the atmosphere across biomes and continents are lacking. Here we present data describing the relationships between net ecosystem exchange of carbon (NEE) and climate factors as measured using the eddy covariance method at 125 unique sites in various ecosystems over six continents with a total of 559 site-years. We find that NEE observed at eddy covariance sites is (1) a strong function of mean annual temperature at mid- and high-latitudes, (2) a strong function of dryness at mid- and low-latitudes, and (3) a function of both temperature and dryness around the mid-latitudinal belt (45°N). The sensitivity of NEE to mean annual temperature breaks down at ~ 16 °C (a threshold value of mean annual temperature), above which no further increase of CO2 uptake with temperature was observed and dryness influence overrules temperature influence.