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DOI	10.1007/s00382-020-05213-6
	Numerical simulation of the circulation and tropical teleconnection mechanisms of a severe drought event (2012–2016) in Northeastern Brazil
	de Medeiros F.J.; de Oliveira C.P.; Santos e Silva C.M.; de Araújo J.M.
发表日期	2020
ISSN	0930-7575
起始页码	4043
结束页码	4057
卷号	54
英文摘要	Large domains in regional climate models are known to provide a better representation of the mesoscale circulation and hence the precipitation field. To evaluate the model performance in reproducing the tropical circulation as well as the severe drought event (2012–2016) in the northeastern Brazil, simulations for the 2012–2016 period were performed using the tropical band version of the Regional Climate Model (RegT-Band). The RegT-Band simulation were driven by the ERA-Interim data for the initial and lateral boundary conditions and sea surface temperature was obtained from NOAA_OISST_V2 reanalysis. The domain covers the entire tropical belt between 30°S and 30°N with grid spacing of about 30 km. Results showed that the general features of the tropical circulation and associated precipitation pattern over the entire domain are well captured by the model compared to the observations. However, systematic biases, mainly related to the double ITCZ bias are observed, which provide an unrealistic peak of double precipitation outside the equator and insufficient precipitation at the equator. In the NEB subdomain, RegT-Band shows weakness and significant model error to represent the subregion where the drought event was more severe. However, the model satisfactorily represents the precipitation anomalies in the driest years. Therefore, this study shows results encouraging the use of RegT-Band to study extreme events associated with droughts conditions in the Northeastern Brazil. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Dynamical downscaling; Precipitation; Regional climate model; RegT-Band; Tropical climate
语种	英语
scopus关键词	atmospheric circulation; boundary condition; climate modeling; computer simulation; drought; extreme event; regional climate; sea surface temperature; teleconnection; Brazil
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145499
作者单位	Graduate Program in Climate Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil; Department of Atmospheric and Climate Sciences, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil; Department of Physics, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil
推荐引用方式 GB/T 7714	de Medeiros F.J.,de Oliveira C.P.,Santos e Silva C.M.,等. Numerical simulation of the circulation and tropical teleconnection mechanisms of a severe drought event (2012–2016) in Northeastern Brazil[J],2020,54.
APA	de Medeiros F.J.,de Oliveira C.P.,Santos e Silva C.M.,&de Araújo J.M..(2020).Numerical simulation of the circulation and tropical teleconnection mechanisms of a severe drought event (2012–2016) in Northeastern Brazil.Climate Dynamics,54.
MLA	de Medeiros F.J.,et al."Numerical simulation of the circulation and tropical teleconnection mechanisms of a severe drought event (2012–2016) in Northeastern Brazil".Climate Dynamics 54(2020).