干旱区生态环境知识资源中心(Arid): Climatology of the heat low and the intertropical discontinuity in the Arabian Peninsula

Arid

DOI	10.1002/joc.7291
	Climatology of the heat low and the intertropical discontinuity in the Arabian Peninsula
	Fonseca, Ricardo; Francis, Diana; Nelli, Narendra; Thota, Mohan
通讯作者	Francis, D (corresponding author), Khalifa Univ Sci & Technol, POB 127788, Abu Dhabi, U Arab Emirates.
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2021-07
英文摘要	In this article, the climatological state and the seasonal variability of the Arabian heat low (AHL) and the intertropical discontinuity (ITD) are investigated over the Arabian Peninsula using the 1979-2019 ERA-5 reanalysis data. The AHL is a summertime feature, mostly at 15 degrees-35 degrees N and 40 degrees-60 degrees E, exhibiting a clear strengthening over the last four decades in line with the observed increase in surface temperature. However, no clear shift in its position is detected. The AHL, driven by both thermodynamic and dynamic forcing, is broader and stronger during daytime and exhibits considerable variability on day-to-day timescales, likely due to the convection associated with the Asian summer monsoon. The ITD is the boundary between the hot and dry desert air and the cooler and more moist air from the Arabian Sea. It lies along the Arabian Peninsula's southern coastline in the cold season but reaches up to 28 degrees N between 50 degrees and 60 degrees E in the summer months. While in the former it has a rather small diurnal variability; in the latter it shows daily fluctuations of up to 10 degrees in latitude. The presence of the Sarawat Mountains over southwestern Saudi Arabia precludes a northward migration of the ITD in this area. The ITD exhibited a weak northward migration in the 41-year period, likely due to the increased sea surface temperatures in the Arabian Sea. On inter-annual timescales, the El Nino-Southern Oscillation, the Indian Ocean Dipole, and solar-geomagnetic effects play an important role in the AHL's and ITD's variability.
英文关键词	arid regions convergence zone heat Low intertropical front land-sea interactions monsoon system
类型	Article ; Early Access
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000674134000001
WOS关键词	WEST-AFRICAN MONSOON ; DIURNAL CYCLE ; DUST EMISSIONS ; INTRASEASONAL VARIABILITY ; CONVECTIVE SYSTEM ; BOUNDARY-LAYER ; COLD POOL ; SUMMER ; SAHARAN ; PRECIPITATION
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/2XILL650/363624
作者单位	[Fonseca, Ricardo; Francis, Diana; Nelli, Narendra] Khalifa Univ Sci & Technol, Environm & Geophys Sci ENGEOS Lab, Abu Dhabi, U Arab Emirates; [Thota, Mohan] Minist Earth Sci, Natl Ctr Medium Range Weather Forecasting, Noida, India
推荐引用方式 GB/T 7714	Fonseca, Ricardo,Francis, Diana,Nelli, Narendra,et al. Climatology of the heat low and the intertropical discontinuity in the Arabian Peninsula[J],2021.
APA	Fonseca, Ricardo,Francis, Diana,Nelli, Narendra,&Thota, Mohan.(2021).Climatology of the heat low and the intertropical discontinuity in the Arabian Peninsula.INTERNATIONAL JOURNAL OF CLIMATOLOGY.
MLA	Fonseca, Ricardo,et al."Climatology of the heat low and the intertropical discontinuity in the Arabian Peninsula".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2021).