The reduced net carbon uptake over Northern Hemisphere land causes the close-to-normal CO2 growth rate in 2021 La Niña

被引：2

作者：

Liu, Junjie ^{[1
,2
]}

Baker, David ^{[3
]}

Basu, Sourish ^{[4
,5
]}

Bowman, Kevin ^{[1
]}

Byrne, Brendan ^{[1
]}

Chevallier, Frederic ^{[6
]}

He, Wei ^{[7
]}

Jiang, Fei ^{[7
]}

Johnson, Matthew S. ^{[8
]}

Kubar, Terence L. ^{[1
,9
]}

Li, Xing ^{[10
]}

Liu, Zhiqiang ^{[11
]}

Miller, Scot M. ^{[12
]}

Philip, Sajeev ^{[13
]}

Xiao, Jingfeng ^{[14
]}

Yun, Jeongmin ^{[1
]}

Zeng, Ning ^{[5
,15
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

[3] Colorado State Univ, Cooperat Inst Res Atmosphere, Ft Collins, CO USA

[4] NASA, Global Modeling & Assimilat Off, Goddard Space Flight Ctr, Greenbelt, MD USA

[5] Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA

[6] Univ Paris Saclay, Lab Sci Climat & Environm, LSCE IPSL, CEA,CNRS,UVSQ, F-91191 Gif Sur Yvette, France

[7] Nanjing Univ, Nanjing, Peoples R China

[8] NASA, Earth Sci Div, Ames Res Ctr, Moffett Field, CA 94035 USA

[9] Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA 90095 USA

[10] Seoul Natl Univ, Res Inst Agr & Life Sci, Seoul, South Korea

[11] Chinese Acad Sci, Inst Atmospher Phys, Lab Numer Modeling Atmospher Sci & Geophys Fluid D, Beijing, Peoples R China

[12] Johns Hopkins Univ, Dept Environm Hlth & Engn, Baltimore, MD 21218 USA

[13] Indian Inst Technol Delhi, Ctr Atmospher Sci, New Delhi, India

[14] Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA

[15] Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA

来源：

SCIENCE ADVANCES | 2024年 / 10卷 / 23期

基金：

美国国家科学基金会;

关键词：

ATMOSPHERIC CO2; FLUXES; UNCERTAINTY; VARIABILITY; SENSITIVITY; RETRIEVALS;

D O I：

10.1126/sciadv.adl2201

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

La Ni & ntilde;a climate anomalies have historically been associated with substantial reductions in the atmospheric CO2 growth rate. However, the 2021 La Ni & ntilde;a exhibited a unique near-neutral impact on the CO2 growth rate. In this study, we investigate the underlying mechanisms by using an ensemble of net CO(2 )fluxes constrained by CO2 observations from the Orbiting Carbon Observatory-2 in conjunction with estimates of gross primary production and fire carbon emissions. Our analysis reveals that the close-to-normal atmospheric CO2 growth rate in 2021 was the result of the compensation between increased net carbon uptake over the tropics and reduced net carbon uptake over the Northern Hemisphere mid-latitudes. Specifically, we identify that the extreme drought and warm anomalies in Europe and Asia reduced the net carbon uptake and offset 72% of the increased net carbon uptake over the tropics in 2021. This study contributes to our broader understanding of how regional processes can shape the trajectory of atmospheric CO2 concentration under climate change.

引用

页数：11