[口头报告]Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated with the 2019 Extreme Positive Indian Ocean Dipole

Enhanced India-Africa Carbon Uptake and Asia-Pacific Carbon Release Associated with the 2019 Extreme Positive Indian Ocean Dipole
编号:3441 稿件编号:306 访问权限:私有 更新:2023-04-25 16:20:49 浏览:309次 口头报告

报告开始:2023年05月06日 13:50 (Asia/Shanghai)

报告时间:15min

所在会议:[20] 20、地球关键带与全球变化 » [20-1] 20-1 地球关键带与全球变化

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摘要
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 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.
 
关键字
陆地碳通量,印度洋偶极子,陆地生态系统模式,大气反演
报告人
王军
南京大学

稿件作者
王军 南京大学国际地球系统科学研究所
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