Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15669 |
Unusual characteristics of the carbon cycle during the 2015−2016 El Niño | |
Kai Wang; Xuhui Wang; Shilong Piao; Fré; dé; ric Chevallier; Jiafu Mao; Xiaoying Shi; Chris Huntingford; Ana Bastos; Philippe Ciais; Hao Xu; Ralph F. Keeling; Stephen W. Pacala; Anping Chen | |
2021-05-25 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | The 2015−2016 El Niño 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 Niño 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 Niño events. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/328710 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Kai Wang,Xuhui Wang,Shilong Piao,et al. Unusual characteristics of the carbon cycle during the 2015−2016 El Niño[J]. Global Change Biology,2021. |
APA | Kai Wang.,Xuhui Wang.,Shilong Piao.,Fré.,dé.,...&Anping Chen.(2021).Unusual characteristics of the carbon cycle during the 2015−2016 El Niño.Global Change Biology. |
MLA | Kai Wang,et al."Unusual characteristics of the carbon cycle during the 2015−2016 El Niño".Global Change Biology (2021). |
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