DOI: 10.1175/JCLI-D-17-0822.1
Scopus记录号: 2-s2.0-85052957717
论文题名: Zonal SST difference as a potential environmental factor supporting the longevity of the Madden-Julian oscillation
作者: Suematsu T. ; Miura H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 18 起始页码: 7549
结束页码: 7564
语种: 英语
英文关键词: Air-sea interaction
; Atmosphere-ocean interaction
; Madden-Julian oscillation
Scopus关键词: Atmospheric thermodynamics
; Oceanography
; Surface waters
; Wind effects
; Air sea interactions
; Atmosphere-ocean interactions
; Atmospheric pattern
; Environmental factors
; Intraseasonal time scale
; Madden-Julian oscillation
; Moist static energy
; Sea surface temperature (SST)
; Climatology
英文摘要: An environment favorable for the development of the Madden-Julian oscillation (MJO) was investigated by classifying MJO-like atmospheric patterns as MJO and regionally confined convective (RCC) events. Comparison of MJO and RCC events showed that even when preceded by a major convective suppression event, convective events did not develop into an MJO when large-scale buildup of moist static energy (MSE) was inhibited. The difference in the MSE accumulation between MJO and RCC is related to the contrasting low-frequency basic-state sea surface temperature (SST) pattern; the MJO and RCC events were associated with anomalously warm and cold low-frequency SSTs prevailing over the western to central Pacific, respectively. Differences in the SST anomaly field were absent from the intraseasonal frequency range of 20-60 days. The basic-state SST pattern associated with the MJO was characterized by a positive zonal SST gradient from the Indian Ocean to the western Pacific, which provided a long-standing condition that allowed for sufficient buildup of MSE across the Indian Ocean to the western Pacific via large-scale low-level convergence over intraseasonal and longer time scales. The results of this study suggest the importance of such a basic-state SST, with a long-lasting positive zonal SST gradient, for enhancing convection over a longer than intraseasonal time scale in realizing a complete MJO life cycle. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111386
Appears in Collections: 气候减缓与适应
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作者单位: The University of Tokyo, Tokyo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Recommended Citation:
Suematsu T.,Miura H.. Zonal SST difference as a potential environmental factor supporting the longevity of the Madden-Julian oscillation[J]. Journal of Climate,2018-01-01,31(18)