DOI: 10.1002/jgrd.50592
论文题名: Factors affecting isotopic composition of the rainwater in the Negev Desert, Israel
作者: Dody A. ; Ziv B.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8274
结束页码: 8284
语种: 英语
英文关键词: Airtrajectory analysis
; cloud top effect
; Isotopic composition
; Mediterranean cyclones
; Negev Desert
Scopus关键词: Clouds
; Landforms
; Rain
; Storms
; Temperature
; Airtrajectory analysis
; Back trajectories
; Convective clouds
; Isotopic composition
; Linear relationships
; Mediterranean sea
; Midlatitude cyclones
; Negev desert
; Isotopes
; convective cloud
; cross section
; cyclone
; environmental factor
; isotopic composition
; rainstorm
; rainwater
; sampling
; temperature effect
; Israel
; Mediterranean Sea
; Negev
; Southern District
英文摘要: The study examines the δ18O of rain observed in the middle of the Negev Desert, Israel, based on seven rainstorms, associated with convective clouds resulting from midlatitude cyclones found over Trans-Jordan. The analysis is based on synoptic maps, vertical atmospheric cross sections, and air back trajectories. The rainwater sampling was done in temporal scale of hours. Four known factors were addressed here: the temperature effect, the amount effect, and two geographical effects: the marine and continental effects. The temperature effect is expressed by a positive relation between the lower level temperature and the isotopic composition. The amount effect, related to rainfall, is negative. The marine effect, expressed by a relation between the time the rain-producing air spends above the Mediterranean Sea, is positive and the continental effect, associated with the passage over land is negative. The linear relationships found in this study met the expectations, although only the amount effect was statistically significant. A fifth effect, entitled cloud top effect proposed here, relates to the height of the convective cloud layer top. It assumes that lower top prevents entrainment of upper cold air into the clouds, so the isotopic composition is enriched. The cloud top effect was found most statistically significant. Key Points Analysis of isotopic composition of rain in the Negev, Israel Air-trajectory analysis for assessment of continental and marine effects Cloud top is proposed and found as significant factor ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63424
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: NRCN, P.O.B. 9001, Beer Sheva, Israel; Department of Geography and Environmental Studies, Ben Gurion University of the Negev, Beer Sheva, Israel; Department of Natural Sciences, Open University of Israel, Raanna, Israel
Recommended Citation:
Dody A.,Ziv B.. Factors affecting isotopic composition of the rainwater in the Negev Desert, Israel[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)