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Title: Global land carbon sink response to temperature and precipitation varies with ENSO phase

Abstract

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. Here, we show that the dominant driver varies with ENSO phase. 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. We further 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.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1406686
Report Number(s):
PNNL-SA-127177
Journal ID: ISSN 1748-9326
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Research Letters; Journal Volume: 12; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Fang, Yuanyuan, Michalak, Anna M., Schwalm, Christopher R., Huntzinger, Deborah N., Berry, Joseph A., Ciais, Philippe, Piao, Shilong, Poulter, Benjamin, Fisher, Joshua B., Cook, Robert B., Hayes, Daniel, Huang, Maoyi, Ito, Akihiko, Jain, Atul, Lei, Huimin, Lu, Chaoqun, Mao, Jiafu, Parazoo, Nicholas C., Peng, Shushi, Ricciuto, Daniel M., Shi, Xiaoying, Tao, Bo, Tian, Hanqin, Wang, Weile, Wei, Yaxing, and Yang, Jia. Global land carbon sink response to temperature and precipitation varies with ENSO phase. United States: N. p., 2017. Web. doi:10.1088/1748-9326/aa6e8e.
Fang, Yuanyuan, Michalak, Anna M., Schwalm, Christopher R., Huntzinger, Deborah N., Berry, Joseph A., Ciais, Philippe, Piao, Shilong, Poulter, Benjamin, Fisher, Joshua B., Cook, Robert B., Hayes, Daniel, Huang, Maoyi, Ito, Akihiko, Jain, Atul, Lei, Huimin, Lu, Chaoqun, Mao, Jiafu, Parazoo, Nicholas C., Peng, Shushi, Ricciuto, Daniel M., Shi, Xiaoying, Tao, Bo, Tian, Hanqin, Wang, Weile, Wei, Yaxing, & Yang, Jia. Global land carbon sink response to temperature and precipitation varies with ENSO phase. United States. doi:10.1088/1748-9326/aa6e8e.
Fang, Yuanyuan, Michalak, Anna M., Schwalm, Christopher R., Huntzinger, Deborah N., Berry, Joseph A., Ciais, Philippe, Piao, Shilong, Poulter, Benjamin, Fisher, Joshua B., Cook, Robert B., Hayes, Daniel, Huang, Maoyi, Ito, Akihiko, Jain, Atul, Lei, Huimin, Lu, Chaoqun, Mao, Jiafu, Parazoo, Nicholas C., Peng, Shushi, Ricciuto, Daniel M., Shi, Xiaoying, Tao, Bo, Tian, Hanqin, Wang, Weile, Wei, Yaxing, and Yang, Jia. Mon . "Global land carbon sink response to temperature and precipitation varies with ENSO phase". United States. doi:10.1088/1748-9326/aa6e8e.
@article{osti_1406686,
title = {Global land carbon sink response to temperature and precipitation varies with ENSO phase},
author = {Fang, Yuanyuan and Michalak, Anna M. and Schwalm, Christopher R. and Huntzinger, Deborah N. and Berry, Joseph A. and Ciais, Philippe and Piao, Shilong and Poulter, Benjamin and Fisher, Joshua B. and Cook, Robert B. and Hayes, Daniel and Huang, Maoyi and Ito, Akihiko and Jain, Atul and Lei, Huimin and Lu, Chaoqun and Mao, Jiafu and Parazoo, Nicholas C. and Peng, Shushi and Ricciuto, Daniel M. and Shi, Xiaoying and Tao, Bo and Tian, Hanqin and Wang, Weile and Wei, Yaxing and Yang, Jia},
abstractNote = {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. Here, we show that the dominant driver varies with ENSO phase. Whereas tropical temperature explains sink dynamics following El Niño conditions (rTG,P=0.59, p<0.01), the post La Niña sink is driven largely by tropical precipitation (rPG,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. We further 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.},
doi = {10.1088/1748-9326/aa6e8e},
journal = {Environmental Research Letters},
number = 6,
volume = 12,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}