DOI: 10.1016/j.atmosenv.2017.11.004
Scopus记录号: 2-s2.0-85033382719
论文题名: Aerosol characteristics in the upper troposphere and lower stratosphere region during successive and contrasting Indian summer monsoon season
作者: Srivastava A ; K ; , Kumar D ; , Misra A ; , Kanawade V ; P ; , Pathak V ; , Tiwari S ; , Devara P ; C ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 173 起始页码: 46
结束页码: 52
语种: 英语
英文关键词: Aerosol
; CALIPSO
; Convection
; ISM
; UTLS
Scopus关键词: Air
; Atmospheric thermodynamics
; Backscattering
; Boundary layer flow
; Boundary layers
; Clouds
; Drought
; Heat convection
; Optical radar
; Troposphere
; Aerosol characteristics
; Aerosol vertical profiles
; Backscatter coefficients
; Backward trajectory analysis
; CALIPSO
; Cloud-aerosol lidar and infrared pathfinder satellite observations
; Optical characteristics
; UTLS
; Aerosols
; aerosol
; atmospheric convection
; backscatter
; boundary layer
; CALIPSO
; drought
; monsoon
; stratosphere
; summer
; tropopause
; troposphere
; vertical profile
; aerosol
; anisotropy
; Article
; depolarization
; height
; Indian summer monsoon
; priority journal
; radiation
; season
; stratosphere
; thermodynamics
; troposphere
; India
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO)-derived aerosol vertical profiles were studied in the upper troposphere and lower stratosphere (UTLS) over the Indian summer monsoon (ISM) region during two successive and contrasting monsoon years (2008–2009). An enhanced aerosol layer was observed in the UTLS between 15 and 19 km altitude, in the vicinity of tropopause during both years. However, the optical characteristics of aerosol layers were found to be dissimilar during the two contrasting consecutive summer monsoon seasons. While the depolarization ratio of enhanced aerosol layer (exceeding 0.2) during both years suggested anisotropic nature of particles, the aerosol backscatter coefficient was observed to be more intensified with a sharp peak during the active monsoon year (2008) whereas it was relatively broader with lower magnitude during a drought year (2009). The enhanced backscatter coefficient in the UTLS was found to be closely associated with the variability in tropopause height and convection during both years, which is more pronounced during the active monsoon year as compared to a drought year. Deep convection over the ISM region may inject boundary layer aerosols into the upper troposphere as evidenced from the analysis of the outgoing long-wave radiation (OLR). Our results also showed an enhanced integrated backscatter coefficient (IBC) of about 30%, which is associated with a decrease in OLR of about 7% during the active monsoon year as compared to drought year. These findings were further corroborated using NCEP-NCAR vertical velocity and HYSPLIT air-mass backward trajectory analyses. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83135
Appears in Collections: 气候变化事实与影响
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作者单位: Indian Institute of Tropical Meteorology (Branch), Prof. Ramnath Vij Marg, New Delhi, India; Department of Civil Engineering, Institute of Engineering and Technology, Lucknow, India; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India; University Centre for Earth & Space Sciences, University of Hyderabad, Hyderabad, India; Amity Centre for Ocean-Atmospheric Science and Technology, Amity University Haryana, Gurgaon-Manesar, India
Recommended Citation:
Srivastava A,K,, Kumar D,et al. Aerosol characteristics in the upper troposphere and lower stratosphere region during successive and contrasting Indian summer monsoon season[J]. Atmospheric Environment,2018-01-01,173