气候变化领域集成服务门户(CCPortal): The climatology of severe convective storms in Tehran

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DOI	10.1016/j.atmosres.2019.01.026
	The climatology of severe convective storms in Tehran
	Firouzabadi M.; Mirzaei M.; Mohebalhojeh A.R.
发表日期	2019
ISSN	0169-8095
起始页码	34
结束页码	45
卷号	221
英文摘要	The severe convective storm (SCS) events that affect Tehran during spring and early summer have potential to cause devastating effects. To study SCSs in Tehran, a climatological analysis is carried out using surface data of Tehran's Mehrabad station from 1961 to 2015 and the NCEP/NCAR reanalysis data to compute the large-scale and the local stability indices. Based on the maximum wind speed, the events are classified into three categories consisting of convective storm (CS), severe convective storm (SCS) and extremely severe convective storm (ESCS). The annual frequency of occurrence of all three categories exhibit decreasing trends during the period of study. Late spring and early summer (April to June) are the favorite times for the SCS and ESCS, and the whole spring is for CS events. In diurnal distribution, for the CS and SCS, the peak occurs at 12–15 UTC. Generally, in response to diurnal surface heating, CS events tend to develop during early- and mid-afternoon, and SCS events during late afternoon. For the months of April to June, while the large-scale stability indices point to a positive trend, no clear trend can be inferred from the examination of local stability indices. While a partial explanation for the decreasing trend of the ESCS is provided based on the large-scale stability indices and the negative trend in the frequency of simultaneous occurrence of the local stability indices, it is likely that the decreasing trends observed for the convective storms are also due to the local urban effects. © 2019 Elsevier B.V.
英文关键词	Annual frequency; CAPE; Climatology; Eady growth rate; Severe convective storm
语种	英语
scopus关键词	Climatology; Stability; Wind; Annual frequency; CAPE; Climatological analysis; Convective storms; Devastating effects; Diurnal distributions; Maximum wind speed; Stability indices; Storms; annual variation; climatology; convective cloud; diurnal variation; frequency analysis; growth rate; seasonal variation; storm; Iran; Tehran [Iran]
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/162061
作者单位	Institute of Geophysics, University of Tehran, Tehran, Iran
推荐引用方式 GB/T 7714	Firouzabadi M.,Mirzaei M.,Mohebalhojeh A.R.. The climatology of severe convective storms in Tehran[J],2019,221.
APA	Firouzabadi M.,Mirzaei M.,&Mohebalhojeh A.R..(2019).The climatology of severe convective storms in Tehran.Atmospheric Research,221.
MLA	Firouzabadi M.,et al."The climatology of severe convective storms in Tehran".Atmospheric Research 221(2019).