DOI: 10.1175/JCLI-D-12-00312.1
Scopus记录号: 2-s2.0-84878151547
论文题名: Characteristics Associated with the Madden-Julian oscillation at Manus Island
作者: Deng L. ; Mcfarlane S.A. ; Flaherty J.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 10 起始页码: 3342
结束页码: 3356
语种: 英语
Scopus关键词: Atmospheric columns
; Atmospheric radiation measurements
; Intraseasonal disturbances
; Madden-Julian oscillation
; Precipitable water vapor
; Tropical Western Pacific
; Two-phase structures
; Vertical resolution
; Phase structure
; Rain
; atmospheric convection
; cloud cover
; Madden-Julian oscillation
; NOAA satellite
; precipitation (climatology)
; rainfall
; water vapor
; westerly
; Admiralty Islands
; Bismarck Archipelago
; Manus
; Manus Island
; Papua New Guinea
英文摘要: Ground-based high temporal and vertical resolution datasets from observations during 2002-07 at the Atmospheric Radiation Measurement (ARM) tropical western Pacific (TWP) site on Manus Island are used to examine the characteristics of clouds and rainfall associated with the active phase of the Madden-Julian oscillation (MJO) passing over Manus. A composite MJO event at Manus is developed based on the NOAA MJO index 4 and precipitation using 13 events. The cloud characteristics associated with the active phase of the MJO at Manus show a two-phase structure as the wave passes over Manus. During the development phase, congestus plays an important role, and the enhanced convection is located between surface westerly and easterly wind anomalies (type-I structure). During the mature phase, deep convection is the dominant cloud type, and the enhanced convection is collocated with the westerly wind anomalies (type-II structure). Consistent with this two-phase structure, the heavy rainfall frequency also shows a two-peak structure during the MJO disturbance, while light rainfall does not show a clear relation to the intraseasonal disturbance associated with the MJO. In addition, a positive relationship between the precipitation rate and precipitable water vapor exists at Manus, and the atmospheric column is less moist after the passing of theMJOconvection center than before. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51937
Appears in Collections: 气候变化事实与影响
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作者单位: Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Deng L.,Mcfarlane S.A.,Flaherty J.E.. Characteristics Associated with the Madden-Julian oscillation at Manus Island[J]. Journal of Climate,2013-01-01,26(10)