气候变化领域集成服务门户(CCPortal): Unusual characteristics of the carbon cycle during the 2015-2016 El Nino

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DOI	10.1111/gcb.15669
	Unusual characteristics of the carbon cycle during the 2015-2016 El Nino
	Wang, Kai; Wang, Xuhui; Piao, Shilong; Chevallier, Frederic; Mao, Jiafu; Shi, Xiaoying; Huntingford, Chris; Bastos, Ana; Ciais, Philippe; Xu, Hao; Keeling, Ralph F.; Pacala, Stephen W.; Chen, Anping
通讯作者	Chen, AP (通讯作者)
发表日期	2021
ISSN	1354-1013
EISSN	1365-2486
起始页码	3798
结束页码	3809
卷号	27 期号:16
英文摘要	The 2015-2016 El Nino was one of the strongest on record, but its influence on the carbon balance is less clear. Using Northern Hemisphere atmospheric CO2 observations, we found both detrended atmospheric CO2 growth rate (CGR) and CO2 seasonal-cycle amplitude (SCA) of 2015-2016 were much higher than that of other El Nino events. The simultaneous high CGR and SCA were unusual, because our analysis of long-term CO2 observations at Mauna Loa revealed a significantly negative correlation between CGR and SCA. Atmospheric inversions and terrestrial ecosystem models indicate strong northern land carbon uptake during spring but substantially reduced carbon uptake (or high emissions) during early autumn, which amplified SCA but also resulted in a small anomaly in annual carbon uptake of northern ecosystems in 2015-2016. This negative ecosystem carbon uptake anomaly in early autumn was primarily due to soil water deficits and more litter decomposition caused by enhanced spring productivity. Our study demonstrates a decoupling between seasonality and annual carbon cycle balance in northern ecosystems over 2015-2016, which is unprecedented in the past five decades of El Nino events.
关键词	SOUTHERN OSCILLATION ATMOSPHERIC CO2 PRODUCTIVITY GREENNESS EXCHANGE DIOXIDE SURFACE TRENDS GROWTH ENSO
英文关键词	atmospheric CO2 growth rate (CGR); CO2 seasonal‐ cycle amplitude (SCA); El Niñ o; net biome productivity (NBP); northern terrestrial ecosystems; soil water deficit
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000653964400001
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260544
推荐引用方式 GB/T 7714	Wang, Kai,Wang, Xuhui,Piao, Shilong,et al. Unusual characteristics of the carbon cycle during the 2015-2016 El Nino[J]. 中国科学院青藏高原研究所,2021,27(16).
APA	Wang, Kai.,Wang, Xuhui.,Piao, Shilong.,Chevallier, Frederic.,Mao, Jiafu.,...&Chen, Anping.(2021).Unusual characteristics of the carbon cycle during the 2015-2016 El Nino.GLOBAL CHANGE BIOLOGY,27(16).
MLA	Wang, Kai,et al."Unusual characteristics of the carbon cycle during the 2015-2016 El Nino".GLOBAL CHANGE BIOLOGY 27.16(2021).