Actions for Global land carbon sink response to temperature and precipitation varies with ENSO phase [electronic resource].

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Global land carbon sink response to temperature and precipitation varies with ENSO phase [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 064,007 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Climate variability associated with the El Niño-Southern Oscillation (ENSO) and its consequent impacts on land carbon sink interannual variability have been used as a basis for investigating carbon cycle responses to climate variability more broadly, and to inform the sensitivity of the tropical carbon budget to climate change. Past studies have presented opposing views about whether temperature or precipitation is the primary factor driving the response of the land carbon sink to ENSO. We show that the dominant driver varies with ENSO phase. And whereas tropical temperature explains sink dynamics following El Niño conditions (r TG,P = 0.59, p < 0.01), the post La Niña sink is driven largely by tropical precipitation (r PG,T= -0.46, p = 0.04). This finding points to an ENSO-phase-dependent interplay between water availability and temperature in controlling the carbon uptake response to climate variations in tropical ecosystems. Furthermore, we find that none of a suite of ten contemporary terrestrial biosphere models captures these ENSO-phase-dependent responses, highlighting a key uncertainty in modeling climate impacts on the future of the global land carbon sink.
Report Numbers
E 1.99:1376649
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Published through SciTech Connect.
06/01/2017.
Environmental Research Letters 12 6 ISSN 1748-9326 AM
Yuanyuan Fang; Anna M. Michalak; Christopher R. Schwalm; Deborah N. Huntzinger; Joseph A. Berry; Philippe Ciais; Shilong Piao; Benjamin Poulter; Joshua B. Fisher; Robert B. Cook; Daniel Hayes; Maoyi Huang; Akihiko Ito; Atul Jain; Huimin Lei; Chaoqun Lu; Jiafu Mao; Nicholas C. Parazoo; Shushi Peng; Daniel M. Ricciuto; Xiaoying Shi; Bo Tao; Hanqin Tian; Weile Wang; Yaxing Wei; Jia Yang.
Funding Information
AC05-00OR22725
View MARC record | catkey: 23775725