DOI: 10.1007/s00382-014-2427-7
Scopus记录号: 2-s2.0-84943814585
论文题名: Zonal movement of the Mascarene High in austral summer
作者: Ohishi S. ; Sugimoto S. ; Hanawa K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-07-08 起始页码: 1739
结束页码: 1745
语种: 英语
英文关键词: El Niño-Southern Oscillation
; Indian Ocean Subtropical Dipole
; Mascarene High
; Southern Annular Mode
; Storm track activity
英文摘要: Temporal variations in the Mascarene High (MH), defined by the sea level pressure (SLP) maximum within the region of [40°–120°E, 50°–10°S] in austral summer (November–January), were investigated using atmospheric reanalysis datasets. The MH longitudinal position has a dominant timescale at about 6 years, which appears to be independent of the MH intensity variation. The MH longitudinal movement is caused by a combination of SLP variations in the eastern South Indian Ocean (ESIO) and in the western South Indian Ocean (WSIO), as follows. (1) Pressure variations in the ESIO region are confined to the lower atmosphere up to the mid-troposphere, and are associated with the El Niño-Southern Oscillation events. (2) Pressure variations in the WSIO region, characterized by a quasi-barotropic structure throughout the troposphere, are related to the meridional movement of storm track. Sea surface temperature anomalies associated with the longitudinal movement of the MH show a southwest–northeast dipole structure, but this is shifted 10° westward in longitude compared with that associated with the MH intensity. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53977
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan; Department of Geophysics, Graduate School of Science, Tohoku University, Miyagi, Japan
Recommended Citation:
Ohishi S.,Sugimoto S.,Hanawa K.. Zonal movement of the Mascarene High in austral summer[J]. Climate Dynamics,2015-01-01,45(2017-07-08)