DOI: 10.1175/JCLI-D-16-0788.1
Scopus记录号: 2-s2.0-85019105847
论文题名: The diurnal cycle of tropical cloudiness and rainfall associated with the Madden-Julian oscillation
作者: Sakaeda N. ; Kiladis G. ; Dias J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 11 起始页码: 3999
结束页码: 4020
语种: 英语
Scopus关键词: Climatology
; Clouds
; Rain gages
; Tropics
; Diurnal effects
; Diurnal rainfall
; Madden-Julian oscillation
; Maritime Continent
; Relative contribution
; Statistically significant difference
; Tropical rainfall
; Tropical variability
; Rain
英文摘要: This study examines the diurnal cycle of rainfall and cloudiness associated with the Madden-Julian oscillation (MJO) using TRMM rainfall rate and ISCCP multilevel cloud fraction data. There are statistically significant differences in diurnal cycle amplitude and phase between suppressed and enhanced envelopes of MJO convection. The amplitude of the diurnal rainfall rate and middle-deep cloudiness increases within enhanced MJO convection, especially over the ocean. However, the differences in diurnal cycle amplitude between enhanced and suppressed MJO are generally smaller than the differences in daily mean values, so that its relative contribution to total rainfall or cloudiness variance within enhanced MJO convection becomes smaller. Near the coastlines of islands within the Maritime Continent, the diurnal cycle amplitude tends to increase 5-10 days prior to the arrival of the peak enhanced MJO convection, but this relationship is weaker over the interior areas of larger islands where the climatological diurnal amplitude is already large. Within enhanced MJO convection, the diurnal rainfall peak is frequently delayed by about 3 h and cloud height decays at slower rate compared to suppressed conditions. More stratiform rainfall occurs following the peak convective rainfall within enhanced MJO convection, delaying the total rainfall peak by a few hours as a result of its greater horizontal extent. The results of this study suggest that the MJO modulates both the amplitude and phase of the diurnal cycle of tropical rainfall and cloudiness by influencing cloud type population distribution and associated rainfall rates. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48873
Appears in Collections: 气候变化与战略
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作者单位: NOAA/Earth System Research Laboratory, Physical Sciences Division, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; NOAA/Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Sakaeda N.,Kiladis G.,Dias J.. The diurnal cycle of tropical cloudiness and rainfall associated with the Madden-Julian oscillation[J]. Journal of Climate,2017-01-01,30(11)