Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1038/s41467-017-02021-1 |
Observed positive vegetation-rainfall feedbacks in the Sahel dominated by a moisture recycling mechanism | |
Yu, Yan1,2; Notaro, Michael1; Wang, Fuyao1; Mao, Jiafu3,4; Shi, Xiaoying3,4; Wei, Yaxing3,4 | |
通讯作者 | Yu, Yan |
来源期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
英文摘要 | Classic, model-based theory of land-atmosphere interactions across the Sahel promote positive vegetation-rainfall feedbacks dominated by surface albedo mechanism. However, neither the proposed positive vegetation-rainfall feedback nor its underlying albedo mechanism has been convincingly demonstrated using observational data. Here, we present observational evidence for the region’s proposed positive vegetation-rainfall feedback on the seasonal to interannual time scale, and find that it is associated with a moisture recycling mechanism, rather than the classic albedo-based mechanism. Positive anomalies of remotely sensed vegetation greenness across the Sahel during the late and post-monsoon periods favor enhanced evapotranspiration, precipitable water, convective activity and rainfall, indicative of amplified moisture recycling. The identified modest low-level cooling and anomalous atmospheric subsidence in response to positive vegetation greenness anomalies are counter to the responses expected through the classic vegetation-albedo feedback mechanism. The observational analysis further reveals enhanced dust emissions in response to diminished Sahel vegetation growth, potentially contributing to the positive vegetation-rainfall feedback. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000416895400015 |
WOS关键词 | WEST-AFRICAN MONSOON ; REGIONAL CLIMATE ; VARIABILITY ; DROUGHT ; PRECIPITATION ; DESERTIFICATION ; SIMULATIONS ; ATMOSPHERE ; DYNAMICS ; NORTHERN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/201223 |
作者单位 | 1.Univ Wisconsin Madison, Nelson Inst Ctr Climat Res, Madison, WI 53706 USA; 2.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 3.Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA; 4.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37831 USA |
推荐引用方式 GB/T 7714 | Yu, Yan,Notaro, Michael,Wang, Fuyao,et al. Observed positive vegetation-rainfall feedbacks in the Sahel dominated by a moisture recycling mechanism[J],2017,8. |
APA | Yu, Yan,Notaro, Michael,Wang, Fuyao,Mao, Jiafu,Shi, Xiaoying,&Wei, Yaxing.(2017).Observed positive vegetation-rainfall feedbacks in the Sahel dominated by a moisture recycling mechanism.NATURE COMMUNICATIONS,8. |
MLA | Yu, Yan,et al."Observed positive vegetation-rainfall feedbacks in the Sahel dominated by a moisture recycling mechanism".NATURE COMMUNICATIONS 8(2017). |
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