Arid
DOI10.5194/acp-20-12011-2020
An idealized model sensitivity study on Dead Sea desertification with a focus on the impact on convection
Khodayar, Samiro; Hoerner, Johannes
通讯作者Khodayar, S
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2020
卷号20期号:20页码:12011-12031
英文摘要The Dead Sea desertification-threatened region is affected by continual lake level decline and occasional but life-endangering flash floods. Climate change has aggravated such issues in the past decades. In this study, the impact on local conditions leading to heavy precipitation from the changing conditions of the Dead Sea is investigated. Idealized sensitivity simulations with the high-resolution COSMO-CLM (COnsortium for Small-scale MOdelling and Climate Limited-area Modelling) and several numerical weather prediction (NWP) runs on an event timescale are performed on the Dead Sea area. The simulations are idealized in the sense that the Dead Sea model representation does not accurately represent the real conditions but those given by an external dataset. A reference or Dead Sea simulation covering the 2003-2013 period and a twin sensitivity or bare soil simulation in which the Dead Sea is set to bare soil are compared. NWP simulations focus on heavy precipitation events exhibiting relevant differences between the Dead Sea and the bare soil decadal realization to assess the impact on the underlying convection-related processes. The change in the conditions of the Dead Sea is seen to affect the atmospheric conditions leading to convection in two ways. (a) The local decrease in evaporation reduces moisture availability in the lower boundary layer locally and in the neighbouring regions, directly affecting atmospheric stability. Weaker updraughts characterize the drier and more stable atmosphere of the simulations in which the Dead Sea has been dried out. (b) Thermally driven wind system circulations and resulting divergence/convergence fields are altered, preventing in many occasions the initiation of convection because of the omission of convergence lines. On a decadal scale, the difference between the simulations suggests a weak decrease in evaporation, higher air temperatures and less precipitation (less than 0.5 %).
类型Article
语种英语
开放获取类型Green Submitted, gold, Green Published
收录类别SCI-E
WOS记录号WOS:000582417200002
WOS关键词CLIMATE-CHANGE ; PRECIPITATION ; EVAPORATION ; TRANSPORT ; ISRAEL
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/2XILL650/327125
作者单位[Khodayar, Samiro] Karlsruhe Inst Technol KIT, Inst Meteorol & Climate Res IMK TRO, Karlsruhe, Germany; [Khodayar, Samiro; Hoerner, Johannes] Mediterranean Ctr Environm Studies CEAM, Valencia, Spain
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Khodayar, Samiro,Hoerner, Johannes. An idealized model sensitivity study on Dead Sea desertification with a focus on the impact on convection[J],2020,20(20):12011-12031.
APA Khodayar, Samiro,&Hoerner, Johannes.(2020).An idealized model sensitivity study on Dead Sea desertification with a focus on the impact on convection.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(20),12011-12031.
MLA Khodayar, Samiro,et al."An idealized model sensitivity study on Dead Sea desertification with a focus on the impact on convection".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.20(2020):12011-12031.
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