Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-21-11423-2021 |
Better representation of dust can improve climate models with too weak an African monsoon | |
Yves Balkanski, Rémy Bonnet, Olivier Boucher, Ramiro Checa-Garcia, and Jérôme Servonnat | |
2021-07-30 | |
发表期刊 | Atmospheric Chemistry and Physics |
出版年 | 2021 |
英文摘要 | The amount of short wave radiation absorbed by dust has remained uncertain. We have developed a more accurate representation of dust absorption that is based on the observed dust mineralogical composition and accounts for very large particles. We analyze the results from two fully coupled climate simulations of 100 years in terms of their simulated precipitation patterns against observations. A striking benefit of the new dust optical and physical properties is that tropical precipitation over the Sahel, tropical North Atlantic and West Indian Ocean are significantly improved compared to observations, without degrading precipitations elsewhere. This alleviates a common persistent bias in Earth system models that exhibit a summer African monsoon that does not reach far enough north. We show that the improvements documented here for the IPSL-CM61 climate model result from both a thermodynamical and dynamical response to dust absorption, which is unrelated to natural variability. Aerosol absorption induces more water vapor advection from the ocean to the Sahel region, thereby providing an added supply of moisture available for precipitation. This work, thus, provides a path towards improving precipitation patterns in these regions by accounting for both physical and optical properties of the aerosol more realistically. |
领域 | 地球科学 |
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/335302 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Yves Balkanski, Rémy Bonnet, Olivier Boucher, Ramiro Checa-Garcia, and Jérôme Servonnat. Better representation of dust can improve climate models with too weak an African monsoon[J]. Atmospheric Chemistry and Physics,2021. |
APA | Yves Balkanski, Rémy Bonnet, Olivier Boucher, Ramiro Checa-Garcia, and Jérôme Servonnat.(2021).Better representation of dust can improve climate models with too weak an African monsoon.Atmospheric Chemistry and Physics. |
MLA | Yves Balkanski, Rémy Bonnet, Olivier Boucher, Ramiro Checa-Garcia, and Jérôme Servonnat."Better representation of dust can improve climate models with too weak an African monsoon".Atmospheric Chemistry and Physics (2021). |
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