DOI: 10.1002/2016GL068269
论文题名: Time scales of shallow-to-deep convective transition associated with the onset of Madden-Julian Oscillations
作者: Xu W. ; Rutledge S.A.
刊名: Geophysical Research Letters
ISSN: 0094-9197
EISSN: 1944-8928
出版年: 2016
卷: 43, 期: 6 起始页码: 2880
结束页码: 2888
语种: 英语
英文关键词: convective moistening
; deep convection
; Madden-Julian Oscillation
; shallow convection
; shallow-to-deep transition
; tropical convection
Scopus关键词: Wind effects
; Deep convection
; Madden-Julian oscillation
; Shallow convection
; Shallow-to-deep transition
; Tropical convection
; Climatology
; air-sea interaction
; amplitude
; atmospheric forcing
; deep sea
; Madden-Julian oscillation
; oceanic convection
; shallow soil
; shallow water
; troposphere
; Indian Ocean
英文摘要: This study statistically investigates the timing and underlying processes of the shallow-to-deep convective transition (SDT) associated with Madden-Julian Oscillations (MJO) initiation over the Indian Ocean. Results show that SDT periods have a median value of 8-10 days with a wide spectrum of 2-20 days. SDTs lasting 10-20 days occurred nearly 50% of the time, consistent with gradual tropospheric moistening and destabilization leading to MJO initiation as described by the discharge-recharge theory. Rapid SDTs (<7 days) took place in 25% of the MJOs studied, including two MJOs observed during Dynamics of the MJO in which previous studies suggested large-scale moistening dominates the local convective moistening during SDT. SDT length is only weakly correlated to MJO amplitude and duration defined by the Real-Time Multivariate MJO index. SDT length is negatively correlated with the duration of the shallow convective period preceding the SDT but weakly correlated with individual parameters associated with preonset environments. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977950784&doi=10.1002%2f2016GL068269&partnerID=40&md5=840d7506bc43e0d5b8bf5d2953f9911d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10160
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Atmospheric Sciences, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Xu W.,Rutledge S.A.. Time scales of shallow-to-deep convective transition associated with the onset of Madden-Julian Oscillations[J]. Geophysical Research Letters,2016-01-01,43(6).