DOI: 10.1002/2017JD027759
Scopus记录号: 2-s2.0-85042074383
论文题名: Vertical Structure and Radiative Forcing of Monsoon Clouds Over Kanpur During the 2016 INCOMPASS Field Campaign
作者: George G. ; Sarangi C. ; Tripathi S.N. ; Chakraborty T. ; Turner A.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2152
结束页码: 2174
语种: 英语
英文关键词: cloud base top height depth
; cloud forcing surface TOA
; cloud multilayers
; India monsoon Indo-Gangetic Plain
; monsoon depression low pressure
; radiosondes weather balloons
英文摘要: An overview of cloud vertical structure (CVS) and cloud radiative forcing (CRF) during Indian summer monsoon is obtained over Kanpur, through observations made during the Interaction of Convective Organisation and Monsoon Precipitation, Atmosphere, Surface and Sea field campaign of 2016. Associations of CVS parameters with CRF at surface and top of atmosphere (TOA) are also investigated. One hundred thirty-seven radiosondes were launched at Indian Institute of Technology Kanpur, between 5 and 28 July 2016. CVS is determined using an algorithm that identifies cloud layers from vertical profiles of relative humidity, with altitude-dependent relative humidity thresholds. CVS is analyzed by separating the campaign period on the basis of presence and absence of depressions/low-pressure systems. Compared to nondepression periods, low-pressure events showed significant difference in all CVS and CRF parameters except cloud top height. CVS was multilayered in ∼75% launches, with deep, mixed-phase clouds being present in ∼70% launches. CRF was calculated from clear-sky measurements and TOA observations from Clouds and the Earth's Radiant Energy System satellite retrievals, and surface measurements. A net cooling effect was found overall, with instantaneous shortwave CRF (mean values of −95.92 and −101.89 W/m2 at surface and TOA, respectively) dominating longwave cloud radiative forcing (LWCRF) (mean values of 15.33 and 66.55 W/m2 at surface and TOA, respectively). Results suggest that shortwave CRF depends on total depth of cloud layers and is independent of cloud altitude, whereas LWCRF depends on both depth and vertical location of cloud layers, with base and top heights regulating LWCRF at surface and TOA, respectively. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114445
Appears in Collections: 气候减缓与适应
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作者单位: Environmental Engineering and Management Programme, IIT Kanpur, Kanpur, India; Department of Civil Engineering, IIT Kanpur, Kanpur, India; Atmospheric Sciences and Global Change, Pacific Northwest National Laboratory, Richland, WA, United States; Centre for Environmental Science and Engineering, IIT Kanpur, Kanpur, India; School of Forestry and Environmental Studies, Yale University, New Haven, CT, United States; Department of Meteorology, University of Reading, Reading, United Kingdom; National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom
Recommended Citation:
George G.,Sarangi C.,Tripathi S.N.,et al. Vertical Structure and Radiative Forcing of Monsoon Clouds Over Kanpur During the 2016 INCOMPASS Field Campaign[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)