气候变化领域集成服务门户(CCPortal): Projection of vegetation impacts on future droughts over West Africa using a coupled RegCM-CLM-CN-DV

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DOI	10.1007/s10584-020-02879-z
	Projection of vegetation impacts on future droughts over West Africa using a coupled RegCM-CLM-CN-DV
	Mehboob M.S.; Kim Y.; Lee J.; Um M.-J.; Erfanian A.; Wang G.
发表日期	2020
ISSN	0165-0009
英文摘要	This study investigates the projected effect of vegetation feedback on drought conditions in West Africa using a regional climate model coupled with the National Center for Atmospheric Research Community Land Model, carbon–nitrogen (CN) module, and dynamic vegetation (DV) module (RegCM4.3.4-CLM-CN-DV). The role of vegetation feedback is examined based on simulations with and without the DV module. Simulations from four different global climate models are used as lateral boundary conditions for historical and future periods (historical: 1981–2000; future: 2081–2100). Using the standardized precipitation evapotranspiration index (SPEI), we quantify the frequency, duration, and intensity of droughts over two focal regions of the Sahel and the Guinea Coast in West Africa. With the dynamic vegetation (DV) considered, future droughts are expected to become more prolonged and enhanced over the Sahel. The drought is defined when the SPEI value is lower than the threshold (− 1) in the simulations with DV than those without DV. Over the Guinea Coast, the impact of DV is opposite compared with that over the Sahel. Additionally, we show that the simulated annual leaf area index associates well with annual minimum SPEI with the correlation coefficient up to 0.91, particularly over the Sahel, which is a transition zone, where land–atmosphere feedback is relatively strong. Results signify the importance of vegetation dynamics in predicting future droughts in West Africa, where the biosphere and atmosphere interactions play a significant role in the regional climate regime. © 2020, Springer Nature B.V.
英文关键词	Drought; LAI; SPEI; Vegetation feedback; West Africa
语种	英语
scopus关键词	Drought; Vegetation; Correlation coefficient; Drought conditions; Global climate model; Lateral boundary conditions; National center for atmospheric researches; Regional climate modeling; Vegetation dynamics; Vegetation feedbacks; Climate models
来源期刊	Climatic Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147278
作者单位	Department of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, South Korea; Department of Civil Engineering, Kyonggi University, Suwon-si, Gyeonggi-do 16227, South Korea; Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, United States
推荐引用方式 GB/T 7714	Mehboob M.S.,Kim Y.,Lee J.,et al. Projection of vegetation impacts on future droughts over West Africa using a coupled RegCM-CLM-CN-DV[J],2020.
APA	Mehboob M.S.,Kim Y.,Lee J.,Um M.-J.,Erfanian A.,&Wang G..(2020).Projection of vegetation impacts on future droughts over West Africa using a coupled RegCM-CLM-CN-DV.Climatic Change.
MLA	Mehboob M.S.,et al."Projection of vegetation impacts on future droughts over West Africa using a coupled RegCM-CLM-CN-DV".Climatic Change (2020).