Biogeosciences
Biogeosciences
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Articles | Volume 13, issue 8
Articles | Volume 13, issue 8
https://doi.org/10.5194/bg-13-2339-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-2339-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 13, issue 8
Research article
 | 
21 Apr 2016
Research article |  | 21 Apr 2016

Interannual variability of the atmospheric CO2 growth rate: roles of precipitation and temperature

Jun Wang, Ning Zeng, and Meirong Wang

Supplement

https://doi.org/10.5194/bg-13-2339-2016-supplement

Data sets

Mauna Loa CO2 C. D. Keeling, R. B. Bacastow, A. E. Bainbridge, C. A. Ekdahl, P. R. Guenther, L. S. Waterman, and J. F. S. Chin, http://www.esrl.noaa.gov/gmd/ccgg/trends/index.html

Globally averaged marine surface CO2 K. A. Masarie, and P. P. Tans http://www.esrl.noaa.gov/gmd/ccgg/trends/global.html

CRU TS 3.21 I. Harris, P. D. Jones, T. J. Osborn, and D. H. Lister http://browse.ceda.ac.uk/browse/badc/cru/data/cru_ts/cru_ts_3.21

GLDAS-2 soil moisture M. Rodell, P. R. Houser, U. Jambor, J. Gottschalck, K. Mitchell, C. J. Meng, K. Arsenault, B. Cosgrove, J. Radakovich, M. Bosilovich, J. K. Entin, J. P. Walker, D. Lohmann, and D. Toll http://disc.sci.gsfc.nasa.gov/hydrology/data-holdings

HadSST2 N. A. Rayner, P. Brohan, D. E. Parker, C. K. Folland, J. J. Kennedy, M. Vanicek, T. J. Ansell, and S. F. B. Tett http://hadobs.metoffice.com/hadsst2/data/download.html

TRENDY Project S. Sitch, P. Friedlingstein, N. Gruber, S. D. Jones, G. Murray-Tortarolo, A. Ahlström, S. C. Doney, H. Graven, C. Heinze, C. Huntingford, S. Levis, P. E. Levy, M. Lomas, B. Poulter, N. Viovy, S. Zaehle, N. Zeng, A. Arneth, G. Bonan, L. Bopp, J. G. Canadell, F. Chevallier, P. Ciais, 
R. Ellis, M. Gloor, P. Peylin, S. L. Piao, C. Le Quéré, B. Smith, Z. Zhu, and R. Myneni http://www-lscedods.cea.fr/invsat/RECCAP/V2/

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Short summary
Relative contribution from precipitation and temperature to interannual variability (IAV) of atmospheric CO2 growth rate (CGR) remains uncertain. We found that CGR IAV has a slightly higher correlation coefficient with temperature than precipitation. However, Trendy models can well simulate the IAV and consistently show net primary production dominates it. These mechanistic analyses suggest a key role of precipitation in CGR IAV despite the higher CGR correlation with temperature.
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