[快闪报告]Black carbon-climate interactions regulate dust burdens over India revealed during COVID-19

Black carbon-climate interactions regulate dust burdens over India revealed during COVID-19
编号:3511 稿件编号:25 访问权限:私有 更新:2023-04-16 15:05:51 浏览:165次 快闪报告

报告开始:2023年05月06日 14:45 (Asia/Shanghai)

报告时间:5min

所在会议:[14B] 14B、气溶胶与大气环境 » [14B-1] 14B-1 气溶胶与大气环境

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摘要
India as a hotspot for air pollution has heavy black carbon (BC) and dust (DU) loadings. BC has been identified to significantly impact the Indian climate. However, whether BC-climate interactions regulate Indian DU during the premonsoon season is unclear. Here, using long-term Reanalysis data, we show that Indian DU is positively correlated to northern Indian BC while negatively correlated to southern Indian BC. We further identify the mechanism of BC-dust-climate interactions revealed during COVID-19. BC reduction in northern India due to lockdown decreases solar heating in the atmosphere and increases surface albedo of the Tibetan Plateau (TP), inducing a descending atmospheric motion. Colder air from the TP together with warmer southern Indian air heated by biomass burning BC results in easterly wind anomalies, which reduces dust transport from the Middle East and Sahara and local dust emissions. The premonsoon aerosol-climate interactions delay the outbreak of the subsequent Indian summer monsoon.
关键字
black carbon,dust,climate
报告人
魏麟懿
清华大学

稿件作者
魏麟懿 清华大学地球系统科学系
王勇 清华大学
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