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DOI | 10.1029/2021GL095629 |
Anthropogenic aerosols modulated twentieth-century Sahel rainfall variability via their impacts on North Atlantic sea surface temperature | |
Shipeng Zhang; Philip Stier; Guy Dagan; Minghuai Wang | |
2021-12-16 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The Sahel rainfall has a close teleconnection with North Atlantic sea surface temperature (NASST) variability, which has separately been shown to be affected by aerosols. Therefore, changes in regional aerosols emission could potentially drive multidecadal Sahel rainfall variability. Here we combine ensembles of state-of-the-art global climate models (the CESM and CanESM large ensemble simulations and CMIP6 models) with observational datasets to demonstrate that anthropogenic aerosols have significantly impacted twentieth-century detrended Sahel rainfall multidecadal variability through modifying NASST. We show that aerosol-induced multidecadal variations of downward solar radiative fluxes over the North Atlantic cause NASST variability during the 20th century, altering the ITCZ position and dynamically linking aerosol effects to Sahel rainfall variability. This process chain is caused by aerosol-induced changes in radiative surface fluxes rather than changes in ocean circulations. CMIP6 models further suggest that aerosol-cloud interactions modulate the inter-model uncertainty of simulated NASST and potentially the Sahel rainfall variability. |
领域 | 气候变化 |
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/344250 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Shipeng Zhang,Philip Stier,Guy Dagan,et al. Anthropogenic aerosols modulated twentieth-century Sahel rainfall variability via their impacts on North Atlantic sea surface temperature[J]. Geophysical Research Letters,2021. |
APA | Shipeng Zhang,Philip Stier,Guy Dagan,&Minghuai Wang.(2021).Anthropogenic aerosols modulated twentieth-century Sahel rainfall variability via their impacts on North Atlantic sea surface temperature.Geophysical Research Letters. |
MLA | Shipeng Zhang,et al."Anthropogenic aerosols modulated twentieth-century Sahel rainfall variability via their impacts on North Atlantic sea surface temperature".Geophysical Research Letters (2021). |
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