干旱区生态环境知识资源中心(Arid): Formation of cyclones over the East Mediterranean within Red-Sea Troughs

Arid

DOI	10.1002/joc.7261
	Formation of cyclones over the East Mediterranean within Red-Sea Troughs
	Ziv, Baruch; Saaroni, Hadas; Etkin, Adi; Harpaz, Tzvi; Shendrik, Lidiya
通讯作者	Saaroni, H (corresponding author), Tel Aviv Univ, Porter Sch Environm & Earth Sci, Dept Geog & Human Environm, POB 39040, IL-6139001 Tel Aviv, Israel.
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2021-06
英文摘要	The Red-Sea Trough (RST) is a lower-level trough extending from the tropical low-pressure to the Levant. Its annual occurrence in the Levant is 20%, mostly in the autumn. It produces dry weather, but occasionally causing local showers and floods. During winter, the dominant synoptic system over the eastern Mediterranean is the Cyprus low (CL). Previous studies showed that some CLs form within pre-existing RSTs, through a tropical-extratropical interaction. This study is the first comprehensive climatological framework of such formation events, analyzing their occurrence, seasonality, and the resulting rainfall in Israel. The study identified and analyzed CLs formed within the domain 31 degrees-35 degrees N, 30 degrees-36 degrees E within an RST that was detected during the preceding 24 hr. We used the 6-hourly ERA-Interim database, with 0.75 degrees x 0.75 degrees resolution, during 1979-2017, and identified 104 formation events, which constitute 10% of the CLs. Most formation events occur during fall and early winter, similarly to the RST. Eighty four percent of them formed during the evening or night, and almost two thirds of the CLs disappeared temporarily at noon and regenerated afterwards. This is attributed to the sea/land diurnal oscillation. Most of the formed CLs were shallow, with little rain, but some became major storms, like 'Alexa', which caused extreme snowing in Jerusalem, in December 2013. The formation scenarios were divided into four categories, according to the location and propagation of the 500-hPa trough. The first is characterized by a closed cyclone approaching from southwest, often connected to active RSTs. In the second, a trough is deepening from the northern sector, possibly a polar intrusion. In the third, the most populated, a trough is approaching from west. The fourth category contains events with no upper-level support. Composite maps indicate that upper-level positive vorticity advection triggered CL formations, on top of pre-existing above-normal lower-level temperatures, imparted by the RST.
英文关键词	cyclogenesis Cyprus low diurnal effect eastern Mediterranean Levant Mediterranean cyclones Red-Sea Trough tropical-extratropical interaction
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000666376500001
WOS关键词	MIDDLE-EAST ; CLIMATOLOGY ; REANALYSIS ; ISRAEL ; WINTER ; STORM ; CLASSIFICATION ; DYNAMICS ; EVENTS ; DESERT
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352247
作者单位	[Ziv, Baruch; Harpaz, Tzvi; Shendrik, Lidiya] Open Univ Israel, Dept Nat Sci, Raanana, Israel; [Saaroni, Hadas; Etkin, Adi; Harpaz, Tzvi] Tel Aviv Univ, Porter Sch Environm & Earth Sci, Dept Geog & Human Environm, POB 39040, IL-6139001 Tel Aviv, Israel
推荐引用方式 GB/T 7714	Ziv, Baruch,Saaroni, Hadas,Etkin, Adi,et al. Formation of cyclones over the East Mediterranean within Red-Sea Troughs[J],2021.
APA	Ziv, Baruch,Saaroni, Hadas,Etkin, Adi,Harpaz, Tzvi,&Shendrik, Lidiya.(2021).Formation of cyclones over the East Mediterranean within Red-Sea Troughs.INTERNATIONAL JOURNAL OF CLIMATOLOGY.
MLA	Ziv, Baruch,et al."Formation of cyclones over the East Mediterranean within Red-Sea Troughs".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2021).