气候变化领域集成服务门户(CCPortal): Process-Based Analysis of the Added Value of Dynamical Downscaling Over Central Africa

CCPortal

DOI	10.1029/2020GL089702
	Process-Based Analysis of the Added Value of Dynamical Downscaling Over Central Africa
	Tamoffo A.T.; Dosio A.; Vondou D.A.; Sonkoué D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	In this study, nine global climate models (GCMs) and corresponding downscaled runs by means of the regional climate model (RCM) RCA4 are used to investigate added value (AV) in precipitation and its some drivers over Central Africa (CA). By employing a process-based analysis approach, we intercompare abilities of RCM to those of driving GCMs in representing the total atmospheric moisture flux convergence (TMFC), moisture transport, and African Easterly Jets (AEJs). Results indicate that simulations with highest AVs in the precipitation climatology also show improvements in the representation of the TMFC and AEJs. Degraded precipitation due to the downscaling is associated with deterioration of at least two of three analyzed mechanisms, and sometimes there is inconsistent AVs between precipitation and related drivers. This sustains that a realistic representation of the moisture transport and atmospheric circulation is of great importance for the correct simulation of present (and, consequently, future) precipitation over CA. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric movements; Climatology; Deterioration; Moisture; African easterly jet; Atmospheric circulation; Atmospheric moisture; Dynamical downscaling; Global climate model; Moisture transport; Precipitation climatology; Regional climate modeling (RCM); Climate models; atmospheric circulation; atmospheric moisture; climate modeling; downscaling; easterly wave; global climate; intertropical convergence zone; jet flow; moisture flux; moisture transfer; precipitation assessment; regional climate; Central Africa
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169830
作者单位	Laboratory for Environmental Modelling and Atmospheric Physics (LEMAP), Department of Physics, University of Yaoundé 1, Yaoundé, Cameroon; LMI DYCOFAC (IRD, University of Yaoundé 1, IRGM), IRD, Yaoundé, Cameroon; European Commission, Joint Research Centre (JRC), Ispra, Italy
推荐引用方式 GB/T 7714	Tamoffo A.T.,Dosio A.,Vondou D.A.,et al. Process-Based Analysis of the Added Value of Dynamical Downscaling Over Central Africa[J],2020,47(17).
APA	Tamoffo A.T.,Dosio A.,Vondou D.A.,&Sonkoué D..(2020).Process-Based Analysis of the Added Value of Dynamical Downscaling Over Central Africa.Geophysical Research Letters,47(17).
MLA	Tamoffo A.T.,et al."Process-Based Analysis of the Added Value of Dynamical Downscaling Over Central Africa".Geophysical Research Letters 47.17(2020).