气候变化领域集成服务门户(CCPortal): The atmospheric controls of extreme convective events over the southern Arabian Peninsula during the spring season

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DOI	10.1016/j.atmosres.2021.105788
	The atmospheric controls of extreme convective events over the southern Arabian Peninsula during the spring season
	Nelli N.R.; Francis D.; Fonseca R.; Abida R.; Weston M.; Wehbe Y.; Al Hosary T.
发表日期	2021
ISSN	0169-8095
卷号	262
英文摘要	Mesoscale Convective Systems (MCSs) over the southern Arabian Peninsula are more common during the spring months of March and April. In this paper, the processes behind such severe convective events and their local-scale impacts are investigated using reanalysis data, satellite-derived and observational products. The analysis of 95 MCS events from 2000 to 2020 revealed that they are triggered by low-level wind convergence and moisture advection from the Arabian Sea, Arabian Gulf and/or Red Sea. An equatorward displacement and strengthening of the subtropical jet also precondition the environment, as does the presence of a mid-level trough. The latter is generally part of a large-scale pattern of anomalies that are equivalent barotropic in nature, and therefore likely a response to tropical or subtropical forcing. At more local-scale, a drying of the mid-troposphere between 850 and 250 hPa typically by 50%, a reduction of the upper-level winds by about 5 m s−1, and an increase in the upper-tropospheric temperature on average by 2–3 K, are typically observed during MCS events. Over the 21-year period, a statistically significant increase in the MCSs' duration over southeast Arabian Peninsula has been found, suggesting that such extreme events may be even more impactful in a warming world. © 2021 The Authors
英文关键词	Arid regions; Climate change; Large-scale triggers; Local-scale impacts; Mesoscale convective systems; Transition seasons
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236608
作者单位	Khalifa University of Science and Technology, P. O. Box 54224, Abu Dhabi, United Arab Emirates; National Center of Meteorology (NCM), P. O. Box 4815, Abu Dhabi, United Arab Emirates
推荐引用方式 GB/T 7714	Nelli N.R.,Francis D.,Fonseca R.,et al. The atmospheric controls of extreme convective events over the southern Arabian Peninsula during the spring season[J],2021,262.
APA	Nelli N.R..,Francis D..,Fonseca R..,Abida R..,Weston M..,...&Al Hosary T..(2021).The atmospheric controls of extreme convective events over the southern Arabian Peninsula during the spring season.Atmospheric Research,262.
MLA	Nelli N.R.,et al."The atmospheric controls of extreme convective events over the southern Arabian Peninsula during the spring season".Atmospheric Research 262(2021).