DOI: 10.1002/jgrd.50114
论文题名: Radiative heating of the ISCCP upper level cloud regimes and its impact on the large-scale tropical circulation
作者: Li W. ; Schumacher C. ; Mcfarlane S.A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 2 起始页码: 592
结束页码: 604
语种: 英语
Scopus关键词: Clouds
; Optical radar
; Radiant heating
; Rain
; Rain gages
; Storms
; Tropics
; Atmospheric radiation measurements
; Circulation anomalies
; Department of Energy
; International satellite cloud climatology projects
; Mesoscale Convective System
; Precipitation radar
; Radiative properties
; Tropical rainfall measuring missions
; Heat radiation
; cirrus
; climate feedback
; cloud radiative forcing
; heating
; lidar
; radar
; TRMM
; tropical environment
; Australia
; Darwin
; Manus
; Northern Territory
; Papua New Guinea
英文摘要: Radiative heating profiles of the International Satellite Cloud Climatology Project (ISCCP) cloud regimes (or weather states) were estimated by matching ISCCP observations with radiative properties derived from cloud radar and lidar measurements from the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) sites at Manus, Papua New Guinea, and Darwin, Australia. Focus was placed on the ISCCP cloud regimes containing the majority of upper level clouds in the tropics, i.e., mesoscale convective systems (MCSs), deep cumulonimbus with cirrus, mixed shallow and deep convection, and thin cirrus. At upper levels, these regimes have average maximum cloud occurrences ranging from 30% to 55% near 12 km with variations depending on the location and cloud regime. The resulting radiative heating profiles have maxima of approximately 1 K/day near 12 km, with equal heating contributions from the longwave and shortwave components. Upper level minima occur near 15 km, with the MCS regime showing the strongest cooling of 0.2 K/day and the thin cirrus showing no cooling. The gradient of upper level heating ranges from 0.2 to 0.4 K/(daykm), with the most convectively active regimes (i.e., MCSs and deep cumulonimbus with cirrus) having the largest gradient. When the above heating profiles were applied to the 25-year ISCCP data set, the tropics-wide average profile has a radiative heating maximum of 0.45Kday-1 near 250 hPa. Column-integrated radiative heating of upper level cloud accounts for about 20% of the latent heating estimated by the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR). The ISCCP radiative heating of tropical upper level cloud only slightly modifies the response of an idealized primitive equation model forced with the tropics-wide TRMM PR latent heating, which suggests that the impact of upper level cloud is more important to large-scale tropical circulation variations because of convective feedbacks rather than direct forcing by the cloud radiative heating profiles. However, the height of the radiative heating maxima and gradient of the heating profiles are important to determine the sign and patterns of the horizontal circulation anomaly driven by radiative heating at upper levels. © 2012. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64026
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Meteorology, Pennsylvania University, University Park, PA 16802, United States; Department of Atmospheric Sciences, Texas A and M University, College Station, TX, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Li W.,Schumacher C.,Mcfarlane S.A.. Radiative heating of the ISCCP upper level cloud regimes and its impact on the large-scale tropical circulation[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(2)