DOI: 10.1002/2017JD027263
Scopus记录号: 2-s2.0-85041093329
论文题名: Modulation of Winter Precipitation Dynamics Over the Arabian Gulf by ENSO
作者: Sandeep S. ; Ajayamohan R.S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 1 起始页码: 198
结束页码: 210
语种: 英语
英文关键词: Arabian Gulf winter precipitation
; ENSO
Scopus关键词: arid region
; economic activity
; El Nino
; El Nino-Southern Oscillation
; La Nina
; precipitation (climatology)
; satellite data
; trajectory
; troposphere
; zonal wind
; Arabian Sea
; Indian Ocean
; Middle East
; Persian Gulf
英文摘要: The Arabian Gulf (Gulf) and the surrounding regions are centers of intense economic activity. The precipitating weather systems that form over the Gulf are important for this predominantly arid region. It is suggested that El Niño–Southern Oscillation (ENSO) influences the Middle East precipitation variability through an equatorward shift of the subtropical jet. Here we present compelling evidence to illustrate the role of ENSO in modulating the local dynamics and moisture transport in initiating precipitation during different ENSO phases using satellite and reanalysis data. It is found that the moisture transport from the Red and Arabian Seas toward the Gulf is stronger during El Niño years. The pattern and strength of moisture transport toward the Gulf is weakened during La Niña and neutral years, with most of the transport directed toward the northern Gulf. Using a 120 h back trajectory analysis, it is found that while the air parcels coming toward the Gulf from the Arabian and Red Seas side originate at lower tropospheric levels, the air parcels from the Mediterranean originate at middle and upper tropospheric levels during El Niño years. In contrast, upper tropospheric air parcels originating over the southern Arabian Sea plays a dominant role on Gulf precipitation during La Niña and neutral years. The seasonal mean transients of zonal winds show a robust ENSO signature over the Gulf, indicating a favorable (less favorable) condition for the penetration of midlatitude eddies over the region during El Niño (La Niña) winters. ©2017. 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/114710
Appears in Collections: 气候减缓与适应
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作者单位: Center for Prototype Climate Modeling, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
Recommended Citation:
Sandeep S.,Ajayamohan R.S.. Modulation of Winter Precipitation Dynamics Over the Arabian Gulf by ENSO[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(1)