DOI: 10.1175/JCLI-D-11-00538.1
Scopus记录号: 2-s2.0-84865094963
论文题名: The diurnal cycle of the boundary layer, convection, clouds, and surface radiation in a coastal monsoon environment (Darwin, Australia)
作者: May P.T. ; Long C.N. ; Protat A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 15 起始页码: 5309
结束页码: 5326
语种: 英语
Scopus关键词: Air temperature
; Atmospheric radiation measurement programs
; Australia
; Boundary layer structure
; Cirrus clouds
; Cloud effects
; Cloud forcing
; Convective rain
; Diurnal cycle
; Diurnal effects
; Diurnal variability
; Diurnal variation
; Land surface
; Long lasting
; Monsoon regimes
; Monsoons
; Radiative energy
; Radiative properties
; Short waves
; Surface radiation
; U.S. Department of Energy
; Warm pools
; Boundary layers
; Clouds
; Precipitation (chemical)
; Rain
; Atmospheric thermodynamics
; air temperature
; atmospheric convection
; atmospheric structure
; boundary layer
; climate modeling
; cloud radiative forcing
; coastal zone
; diurnal variation
; monsoon
; precipitation (climatology)
; rainfall
; spatial distribution
; Australia
; Darwin
; Northern Territory
英文摘要: The diurnal variation of convection and associated cloud and radiative properties remains a significant issue in global NWP and climate models. This study analyzes observed diurnal variability of convection in a coastal monsoonal environment examining the interaction of convective rain clouds, their associated cloud prop- erties, and the impact on the surface radiation and corresponding boundary layer structure during periods where convection is suppressed or active on the large scale. The analysis uses data from the Tropical Warm Pool International Cloud Experiment (TWP-ICE) as well as routine measurements from the Australian Bureau of Meteorology and the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program. Both active monsoonal and large-scale suppressed (buildup and break) conditions are examined and demonstrate that the diurnal variation of rainfall is much larger during the break periods and the spatial distribution of rainfall is very different between the monsoon and break regimes. During the active monsoon the total net radiative input to the surface is decreased by more than 3 times the amount than during the break regime-this total radiative cloud forcing is found to be dominated by the shortwave (SW) cloud effects because of the much larger optical thicknesses and persistence of long-lasting anvils and cirrus cloud decks associated with the monsoon regime. These differences in monsoon versus break surface radiative energy contribute to low-level air temperature differences in the boundary layer over the land surfaces. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52298
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Australian Weather and Climate Research, Melbourne, VIC, Australia; Bureau of Meteorology, CSIRO, Melbourne, VIC, Australia; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
May P.T.,Long C.N.,Protat A.. The diurnal cycle of the boundary layer, convection, clouds, and surface radiation in a coastal monsoon environment (Darwin, Australia)[J]. Journal of Climate,2012-01-01,25(15)