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Changes in the Response of the Northern Hemisphere Carbon Uptake to Temperature Over the Last Three Decades

Yin, Yi and Ciais, Philippe and Chevallier, Frederic and Li, Wei and Bastos, Ana and Piao, Shilong and Wang, Tao and Liu, Hongyan (2018) Changes in the Response of the Northern Hemisphere Carbon Uptake to Temperature Over the Last Three Decades. Geophysical Research Letters, 45 (9). pp. 4371-4380. ISSN 0094-8276. doi:10.1029/2018GL077316.

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The CO_2 seasonal cycle amplitude (SCA) in the Northern Hemisphere has increased since the 1960s—a feature attributed mainly to enhanced vegetation activity along climate warming and CO_2 increase. We identified a temporal change in the sign of the correlation between SCA and air temperature (T) from positive to negative around the year 2000 at most Northern Hemisphere ground stations, consistent with signals from satellite column CO_2 measurements since the mid‐2000s. Further, we explored potential causes of this change using net biome productivity estimates from three atmospheric inversions for the period 1980–2015. The change in the SCA‐T relationship is primarily attributable to changes in the net biome productivity‐T relationship: positive correlations weakened in the spring in the high latitudes, confirming a limit to the “warmer spring‐bigger carbon sink” mechanism; negative correlations diminished in the autumn/winter in the mid‐to‐high latitudes, challenging the “warmer winter‐larger carbon release” assumption and highlighting the complexity of carbon processes outside the peak growing season.

Item Type:Article
Related URLs:
URLURL TypeDescription
Yin, Yi0000-0003-4750-4997
Ciais, Philippe0000-0001-8560-4943
Chevallier, Frederic0000-0002-4327-3813
Li, Wei0000-0003-2543-2558
Bastos, Ana0000-0002-7368-7806
Piao, Shilong0000-0001-8057-2292
Wang, Tao0000-0002-1323-8697
Liu, Hongyan0000-0002-6721-4439
Additional Information:© 2018 American Geophysical Union. Received 29 JAN 2018; Accepted 7 APR 2018; Accepted article online 19 APR 2018; Published online 4 MAY 2018. All the data supporting this study can be found in the citation of the data sources. The authors thank Christian Rödenbeck for providing the JENA inversion results and helpful discussion. We acknowledge the Earth System Research Laboratory, National Oceanic and Atmospheric Administration (NOAA‐ESRL) Carbon Cycle Greenhouse Gases (CCGG) group for providing the surface CO_2 measurements from various stations, with special thanks to Ed Dlugokencky and Pieter Tans for their helpful instructions regarding the data set. We thank the ESA GHG‐CCI project for providing satellite X_(CO2) retrievals of IUP‐Bremen University SCIAMACHY and Leicester University GOSAT. The authors are very grateful to the many people involved in the surface and satellite CO_2 observations and in the archiving of these data. We also wish to thank N. C. Parazoo for helpful comments on the manuscript. The research leading to these results has received funding from the European Research Council Synergy grant ERC‐2013‐SyG 610028 (IMBALANCE‐P) and from the French Agence Nationale de la Recherche (ANR) Convergence Lab Changement climatique et usage des terres (CLAND).
Funding AgencyGrant Number
European Research Council (ERC)ERC‐2013‐SyG 610028
Agence Nationale pour la Recherche (ANR)UNSPECIFIED
Subject Keywords:CO2 seasonal cycle; carbon‐climate interaction; temperature sensitivity; net biome production; global carbon cycle; soil respiration
Issue or Number:9
Record Number:CaltechAUTHORS:20180611-073836218
Persistent URL:
Official Citation:Yin, Y., Ciais, P., Chevallier, F., Li, W., Bastos, A., Piao, S., et al. (2018). Changes in the response of the Northern Hemisphere carbon uptake to temperature over the last three decades. Geophysical Research Letters, 45, 4371–4380.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86955
Deposited By: Tony Diaz
Deposited On:11 Jun 2018 21:06
Last Modified:15 Nov 2021 20:43

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