Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole

Jun Wang; Fei Jiang; Weimin Ju; Meirong Wang; Stephen Sitch; Vivek K. Arora; Jing M. Chen; Daniel S. Goll; Wei He; Atul K. Jain; Xing Li; Joanna Joiner; Benjamin Poulter; Roland Séférian; Hengmao Wang; Mousong Wu; Jingfeng Xiao; Wenping Yuan; Xu Yue; Sönke Zaehle

doi:10.1029/2022GL100950

Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole

Jun Wang, Fei Jiang, Weimin Ju, Meirong Wang, Stephen Sitch, Vivek K. Arora, Jing M. Chen, Daniel S. Goll, Wei He, Atul K. Jain, Xing Li, Joanna Joiner, Benjamin Poulter, Roland Séférian, Hengmao Wang, Mousong Wu, Jingfeng Xiao, Wenping Yuan, Xu Yue, Sönke Zaehle

Research output: Contribution to journal › Article › peer-review

Abstract

The 2019 extreme positive Indian Ocean dipole drove climate extremes over Indian Ocean rim countries with unclear carbon-cycle responses. We investigated its impact on net biome productivity (NBP) and its constituent fluxes, using the Global Carbon Assimilation System (GCASv2) product, process-based model simulations from TRENDYv9, and satellite-based gross primary productivity (GPP). By distinguishing two separate regions, the India-Africa and Asia-Pacific, GCASv2 indicated enhanced terrestrial carbon uptake of 0.23 ± 0.20 PgC and release of 0.38 ± 0.15 PgC, respectively, during September–December (SOND) 2019. These NBP anomalies had comparable magnitudes to those following the 2015 extreme El Niño which, however, caused the consistent carbon release in both regions. The TRENDYv9 model ensemble confirmed these NBP responses, albeit with smaller magnitudes. These regional NBP anomalies were related to soil moisture variations with a dominant role of GPP. Understanding the impact of IOD provides new insights into mechanisms driving interannual variations in regional carbon cycling.

Original language	English (US)
Article number	e2022GL100950
Journal	Geophysical Research Letters
Volume	49
Issue number	22
DOIs	https://doi.org/10.1029/2022GL100950
State	Published - Nov 28 2022

Keywords

Global Carbon Assimilation System
Indian Ocean Dipole
NBP anomalies
regional carbon cycling
terrestrial biosphere models

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

Online availability

10.1029/2022GL100950

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Wang, J., Jiang, F., Ju, W., Wang, M., Sitch, S., Arora, V. K., Chen, J. M., Goll, D. S., He, W., Jain, A. K., Li, X., Joiner, J., Poulter, B., Séférian, R., Wang, H., Wu, M., Xiao, J., Yuan, W., Yue, X., & Zaehle, S. (2022). Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole. Geophysical Research Letters, 49(22), Article e2022GL100950. https://doi.org/10.1029/2022GL100950

Wang, J, Jiang, F, Ju, W, Wang, M, Sitch, S, Arora, VK, Chen, JM, Goll, DS, He, W, Jain, AK, Li, X, Joiner, J, Poulter, B, Séférian, R, Wang, H, Wu, M, Xiao, J, Yuan, W, Yue, X & Zaehle, S 2022, 'Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole', Geophysical Research Letters, vol. 49, no. 22, e2022GL100950. https://doi.org/10.1029/2022GL100950

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title = "Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole",

abstract = "The 2019 extreme positive Indian Ocean dipole drove climate extremes over Indian Ocean rim countries with unclear carbon-cycle responses. We investigated its impact on net biome productivity (NBP) and its constituent fluxes, using the Global Carbon Assimilation System (GCASv2) product, process-based model simulations from TRENDYv9, and satellite-based gross primary productivity (GPP). By distinguishing two separate regions, the India-Africa and Asia-Pacific, GCASv2 indicated enhanced terrestrial carbon uptake of 0.23 ± 0.20 PgC and release of 0.38 ± 0.15 PgC, respectively, during September–December (SOND) 2019. These NBP anomalies had comparable magnitudes to those following the 2015 extreme El Ni{\~n}o which, however, caused the consistent carbon release in both regions. The TRENDYv9 model ensemble confirmed these NBP responses, albeit with smaller magnitudes. These regional NBP anomalies were related to soil moisture variations with a dominant role of GPP. Understanding the impact of IOD provides new insights into mechanisms driving interannual variations in regional carbon cycling.",

keywords = "Global Carbon Assimilation System, Indian Ocean Dipole, NBP anomalies, regional carbon cycling, terrestrial biosphere models",

author = "Jun Wang and Fei Jiang and Weimin Ju and Meirong Wang and Stephen Sitch and Arora, {Vivek K.} and Chen, {Jing M.} and Goll, {Daniel S.} and Wei He and Jain, {Atul K.} and Xing Li and Joanna Joiner and Benjamin Poulter and Roland S{\'e}f{\'e}rian and Hengmao Wang and Mousong Wu and Jingfeng Xiao and Wenping Yuan and Xu Yue and S{\"o}nke Zaehle",

note = "Funding Information: We gratefully acknowledge the TRENDY DGVM community, as part of the Global Carbon Project, for access to gridded land data. This study was supported by the National Key Research and Development Program of China (2021YFB3901001 and 2020YFA0607504), the Natural Science Foundation of Jiangsu Province, China (BK20221449), and the Research Funds for the Frontiers Science Center for Critical Earth Material Cycling, Nanjing University (0904–14380031). The analysis was carried out on the blade cluster system of the High Performance Computing Center (HPCC) at Nanjing University. Publisher Copyright: {\textcopyright} 2022. American Geophysical Union. All Rights Reserved.",

year = "2022",

month = nov,

day = "28",

doi = "10.1029/2022GL100950",

language = "English (US)",

volume = "49",

journal = "Geophysical Research Letters",

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T1 - Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole

AU - Wang, Jun

AU - Jiang, Fei

AU - Ju, Weimin

AU - Wang, Meirong

AU - Sitch, Stephen

AU - Arora, Vivek K.

AU - Chen, Jing M.

AU - Goll, Daniel S.

AU - He, Wei

AU - Jain, Atul K.

AU - Li, Xing

AU - Joiner, Joanna

AU - Poulter, Benjamin

AU - Séférian, Roland

AU - Wang, Hengmao

AU - Wu, Mousong

AU - Xiao, Jingfeng

AU - Yuan, Wenping

AU - Yue, Xu

AU - Zaehle, Sönke

N1 - Funding Information: We gratefully acknowledge the TRENDY DGVM community, as part of the Global Carbon Project, for access to gridded land data. This study was supported by the National Key Research and Development Program of China (2021YFB3901001 and 2020YFA0607504), the Natural Science Foundation of Jiangsu Province, China (BK20221449), and the Research Funds for the Frontiers Science Center for Critical Earth Material Cycling, Nanjing University (0904–14380031). The analysis was carried out on the blade cluster system of the High Performance Computing Center (HPCC) at Nanjing University. Publisher Copyright: © 2022. American Geophysical Union. All Rights Reserved.

PY - 2022/11/28

Y1 - 2022/11/28

N2 - The 2019 extreme positive Indian Ocean dipole drove climate extremes over Indian Ocean rim countries with unclear carbon-cycle responses. We investigated its impact on net biome productivity (NBP) and its constituent fluxes, using the Global Carbon Assimilation System (GCASv2) product, process-based model simulations from TRENDYv9, and satellite-based gross primary productivity (GPP). By distinguishing two separate regions, the India-Africa and Asia-Pacific, GCASv2 indicated enhanced terrestrial carbon uptake of 0.23 ± 0.20 PgC and release of 0.38 ± 0.15 PgC, respectively, during September–December (SOND) 2019. These NBP anomalies had comparable magnitudes to those following the 2015 extreme El Niño which, however, caused the consistent carbon release in both regions. The TRENDYv9 model ensemble confirmed these NBP responses, albeit with smaller magnitudes. These regional NBP anomalies were related to soil moisture variations with a dominant role of GPP. Understanding the impact of IOD provides new insights into mechanisms driving interannual variations in regional carbon cycling.

AB - The 2019 extreme positive Indian Ocean dipole drove climate extremes over Indian Ocean rim countries with unclear carbon-cycle responses. We investigated its impact on net biome productivity (NBP) and its constituent fluxes, using the Global Carbon Assimilation System (GCASv2) product, process-based model simulations from TRENDYv9, and satellite-based gross primary productivity (GPP). By distinguishing two separate regions, the India-Africa and Asia-Pacific, GCASv2 indicated enhanced terrestrial carbon uptake of 0.23 ± 0.20 PgC and release of 0.38 ± 0.15 PgC, respectively, during September–December (SOND) 2019. These NBP anomalies had comparable magnitudes to those following the 2015 extreme El Niño which, however, caused the consistent carbon release in both regions. The TRENDYv9 model ensemble confirmed these NBP responses, albeit with smaller magnitudes. These regional NBP anomalies were related to soil moisture variations with a dominant role of GPP. Understanding the impact of IOD provides new insights into mechanisms driving interannual variations in regional carbon cycling.

KW - Global Carbon Assimilation System

KW - Indian Ocean Dipole

KW - NBP anomalies

KW - regional carbon cycling

KW - terrestrial biosphere models

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DO - 10.1029/2022GL100950

M3 - Article

AN - SCOPUS:85142909709

SN - 0094-8276

VL - 49

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 22

M1 - e2022GL100950

ER -

Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated With the 2019 Extreme Positive Indian Ocean Dipole

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