干旱区生态环境知识资源中心(Arid): Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset

Arid

DOI	10.3390/atmos12101245
	Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset
	Airey, Martin W.; Nicoll, Keri A.; Harrison, R. Giles; Marlton, Graeme J.
通讯作者	Airey, MW (corresponding author), Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England.
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2021
卷号	12 期号:10
英文摘要	Understanding rainfall in arid and water-scarce regions is central to the efficient use of water resources in agriculture, irrigation, and domestic food security. This work presents a new dataset with which to study precipitation processes in arid regions, utilising two years (2018-2020) of ceilometer observations made at Al Ain International Airport in the desert region of Al Ain, United Arab Emirates (UAE), where the annual rainfall is 76 mm. Ceilometer data provide a novel method by which to study both the evolution of water droplets from the cloud base down to the surface and the local circumstances required for rain to successfully reach the surface. In this work, we explore how successful precipitation depends on the initial size of the droplets and the thermodynamic profile below the cloud. For 64 of the 105 rain events, the droplet diameters ranged from 0.60 to 3.75 mm, with a mean of 1.84 mm. We find that smaller droplets, higher cloud bases, reduced cloud depths, and colder cloud bases all act to prevent successful precipitation, instead yielding virga (28 out of the 105 rain generating events). We identify how these multiple regional factors combine-specifically, we identify clouds deeper than 2.9 km, droplet diameters greater than 2 mm, and a midpoint below-cloud RH profile greater than 50%-to give successful rainfall, which may ultimately lead to more efficient rainfall enhancing measures, such as cloud seeding.
英文关键词	cloud droplets drought ceilometer UAE evaporation virga
类型	Article
语种	英语
开放获取类型	gold, Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000717018200001
WOS关键词	CLOUDS ; EVAPORATION ; STRATOCUMULUS ; MICROPHYSICS ; CONSISTENCY ; PRODUCTS ; RAINFALL ; AEROSOL ; SPECTRA
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368314
作者单位	[Airey, Martin W.; Nicoll, Keri A.; Harrison, R. Giles] Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England; [Marlton, Graeme J.] Met Off, Fitzroy Rd, Exeter EX1 3PB, Devon, England
推荐引用方式 GB/T 7714	Airey, Martin W.,Nicoll, Keri A.,Harrison, R. Giles,et al. Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset[J],2021,12(10).
APA	Airey, Martin W.,Nicoll, Keri A.,Harrison, R. Giles,&Marlton, Graeme J..(2021).Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset.ATMOSPHERE,12(10).
MLA	Airey, Martin W.,et al."Characteristics of Desert Precipitation in the UAE Derived from a Ceilometer Dataset".ATMOSPHERE 12.10(2021).