DOI: 10.1002/jgrd.50569
论文题名: Extreme precipitation events in the Middle East: Dynamics of the Active Red Sea Trough
作者: De Vries A.J. ; Tyrlis E. ; Edry D. ; Krichak S.O. ; Steil B. ; Lelieveld J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 13 起始页码: 7087
结束页码: 7108
语种: 英语
英文关键词: Active Red Sea Trough
; Arabian Anticyclone
; ERA-Interim
; Jeddah flooding
; Middle East
; tropical-extratropical interaction
Scopus关键词: Dynamics
; Moisture
; Precipitation (meteorology)
; Tropics
; Arabian Anticyclone
; Era interims
; Middle East
; Red sea
; Tropical-extratropical interactions
; Floods
; anticyclone
; flash flood
; flooding
; instability
; moisture
; precipitation (climatology)
; Rossby wave
; seasonality
; Indian Ocean
; Middle East
; Red Sea [Indian Ocean]
; Aphrodita
英文摘要: The Active Red Sea Trough (ARST) is an infrequent weather phenomenon that is associated with extreme precipitation, flash floods, and severe societal impacts in the Middle East (ME). Using reanalysis (ERA-Interim) and observational precipitation (Aphrodite and stations) data, we investigate its underlying dynamics, geographical extent, and seasonality. Twelve ARST events affecting the Levant have the same dynamical characteristics as those associated with a major flood in Jeddah (Saudi Arabia) on 25 November 2009. Hence, the Jeddah flooding was caused by an ARST, which implies that ARSTs can affect a much larger part of the ME than previously assumed. We present an ARST concept involving six dynamical factors: (1) a low-level trough; the Red Sea Trough (RST), (2) an anticyclone over the Arabian Peninsula; the Arabian Anticyclone (AA), (3) a transient midlatitude upper trough, (4) an intensified subtropical jet stream, (5) moisture transport pathways, and (6) strong ascent resulting from tropospheric instability and the synoptic-scale dynamical forcing. We explain the ARST as the interaction of a persistent stationary wave in the tropical easterlies (i.e., the RST) with a superimposed amplifying Rossby wave, resulting in northward propagating moist air masses over the Red Sea. Our findings emphasize the relevance of the AA, causing moisture transport from the Arabian and Red Seas. The particular topography in the Red Sea region and associated low-level circulation makes the ARST unique among tropical-extratropical interactions. The ARST seasonality is explained by the large-scale circulation and in particular the seasonal cycle of the semipermanent quasi-stationary RST and AA. Key Points Concept of Active Red Sea Trough based on synoptic dynamics Jeddah flooding of 25 November 2009 associated with Active Red Sea Trough Role of Arabian Anticyclone and moisture transport in Active Red Sea Trough ©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/63583
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Energy, Environment and Water Research, Cyprus Institute, 20 Konstantinou Kavafi St., 2121 Aglantzia, Nicosia, Cyprus; Department of Geophysical, Atmospheric and Planetary Sciences, Tel Aviv University, Tel Aviv, Israel; Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Recommended Citation:
De Vries A.J.,Tyrlis E.,Edry D.,et al. Extreme precipitation events in the Middle East: Dynamics of the Active Red Sea Trough[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(13)