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Climate Control of Terrestrial Ecosystem CO2 Exchanges
This was supported by
U.S. National Science Foundation (NSF-DEB-0949637)
Relationships between climate and the net exchange of carbon dioxide
(CO2) between the atmosphere and biosphere on yearly to decadal
scales are poorly known. This is a critical knowledge gap for models
used to estimate long-term climate change impacts on both the
biosphere and the rate of change of CO2 in the atmosphere.
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 6 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 (45oN). The sensitivity of NEE to mean annual temperature also
breaks down at a threshold value of ~16oC, above which no
further increase of CO2 uptake with temperature was observed and
dryness influence overrules temperature influence.
Yi, C., D. Ricciuto, R.
Li, J. Wolbeck, X. Xu, M. Nilsson, L.
Aires, J. D. Albertson, C. Ammann, M. A. Arain, A.
C. de Araujo, M. Aubinet, M. Aurela, Z. Barcza, A.
Barr, P. Berbigier, J. Beringer, C. Bernhofer, A. T.
Black, P. V. Bolstad, F. C. Bosveld, M. S. J.
Broadmeadow, N. Buchmann, S. P. Burns, P. Cellier,
J.M. Chen, J.Q. Chen, P. Ciais, R. Clement, B. D.
Cook, P. S. Curtis, D. B. Dail, E. Dellwik, N.
Delpierre, A. R. Desai, S. Dore, D. Dragoni, B. G.
Drake, E. Dufrêne, A. Dunn, J. Elbers, W. Eugster,
M. Falk, C. Feigenwinter, L. B. Flanagan, T. Foken,
J. Frank, J. Fuhrer, D. Gianelle, A. Goldstein, M.
Goulden, A. Granier, T. Grünwald, L. Gu, H. Guo, A.
Hammerle, S. Han, N. P Hanan, L. Haszpra, B.
Heinesch, C. Helfter, D. Hendriks, L. B. Hutley, A.
Ibrom, C. Jacobs, T. Johansson, M. Jongen, G. Katul,
G. Kiely, K. Klumpp, A. Knohl, T. Kolb, W. L. Kutsch,
P. Lafleur, T. Laurila, R. Leuning, A. Lindroth, H.
Liu, B. Loubet, G. Manca, M. Marek, H. A. Margolis,
T. A. Martin, W. J Massman, R. Matamala, G.
Matteucci, H. McCaughey, L. Merbold, T. Meyers, M.
Migliavacca, F. Miglietta, L. Misson, M. Mölder, J.
Moncrieff, R. K. Monson, L. Montagnani, M. Montes-Helu,
E. Moors, Ch. Moureaux, M. M Mukelabai, J. W. Munger,
M. Myklebust, Z. Nagy, A. Noormets, W. Oechel, R.
Oren, S. G. Pallardy, K. T. Paw U, J. S. Pereira, K.
Pilegaard, K. Pintér, C. Pio, G. Pita, T. L. Powell,
S. Rambal, J. T. Randerson, C. von Randow, C.
Rebmann, J. Rinne, F. Rossi, N. Roulet, R. J. Ryel,
J. Sagerfors, N. Saigusa, M. J. Sanz, G.S. Mugnozza,
H. P. Schmid, G. Seufert, M. Siqueira, J. F.
Soussana, G. Starr, M. A. Sutton, J. Tenhunen, Z.
Tuba, J. P. Tuovinen, R.Valentini, C. S. Vogel, J.
Wang, S. Wang, W. Wang, L. R. Welp, X. Wen, S.
Wharton, M. Wilkinson, C. A. Williams, G. Wohlfahrt,
S. Yamamoto, G. Yu, R. Zampedri, B. Zhao, X. Zhao,
Climate control of terrestrial carbon exchange
across biomes and continents, Environmental
Research Letters, 5, doi:
10.1088/1748-9326/5/3/034007, 2010. [Print
Version]
[Supplementary
Data][PPTs-2010-AGU-Fall-Meeting]
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