Arid
DOI10.5194/acp-18-17669-2018
Large contrast in the vertical distribution of aerosol optical properties and radiative effects across the Indo-Gangetic Plain during the SWAAMI-RAWEX campaign
Vaishya, Aditya1,4; Babu, Surendran Nair Suresh1; Jayachandran, Venugopalan1; Gogoi, Mukunda M.1; Lakshmi, Naduparambil Bharathan1; Moorthy, Krishnaswamy Krishna2; Satheesh, Sreedharan Krishnakumari2,3
通讯作者Vaishya, Aditya
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2018
卷号18期号:23页码:17669-17685
英文摘要

Measurements of the vertical profiles of the optical properties ( namely the extinction coefficient and scattering and absorption coefficients respectively sigma(ext)=sigma(scat)=sigma(abs)) of aerosols have been made across the Indo-Gangetic Plain (IGP) using an instrumented aircraft operated from three base stations-Jodhpur (JDR), representing the semi-arid western IGP; Varanasi (VNS), the central IGP characterized by significant anthropogenic activities; and the industrialized coastal location in the eastern end of the IGP (Bhubaneswar, BBR)-just prior to the onset of the Indian summer monsoon. The vertical profiles depicted region-specific absorption characteristics, while the scattering characteristics remained fairly uniform across the region, leading to a west-east gradient in the vertical structure of single-scattering albedo (SSA). Integrated from near the ground to 3 km, the highest absorption coefficient and hence the lowest SSA occurred in the central IGP (Varanasi). Size distribution, inferred from the spectral variation of the scattering coefficient, showed a gradual shift from coarse-particle dominance in the western IGP to strong accumulation dominance in the eastern coast with the central IGP coming in between, arising from a change in the aerosol type from a predominantly natural (dust and sea salt) type in the western IGP to a highly anthropogenic type (industrial emissions, fossil fuel and biomass combustion) in the eastern IGP, with the central IGP exhibiting a mixture of both. Aerosol-induced short-wave radiative forcing, estimated using altitude-resolved SSA information, revealed significant atmospheric warming in the central IGP, while a top-of-atmosphere cooling is seen, in general, in the IGP. Atmospheric heating rate profiles, estimated using altitude-resolved SSA and column-averaged SSA, revealed considerable underestimation in the latter case, emphasizing the importance and necessity of having altitude-resolved SSA information as against a single value for the entire column.


类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000453086100002
WOS关键词BLACK CARBON ; LIGHT-ABSORPTION ; DUST TRANSPORT ; MINERAL DUST ; URBAN SITE ; BAY ; PARTICLES ; BASIN ; QUANTIFICATION ; HETEROGENEITY
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207917
作者单位1.Vikram Sarabhai Space Ctr, Space Phys Lab, ISRO PO, Thiruvananthapuram, Kerala, India;
2.Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bangalore, Karnataka, India;
3.Indian Inst Sci, Divecha Ctr Climate Change, Bangalore, Karnataka, India;
4.Ahmedabad Univ, Sch Arts & Sci, Ahmadabad, Gujarat, India
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Vaishya, Aditya,Babu, Surendran Nair Suresh,Jayachandran, Venugopalan,et al. Large contrast in the vertical distribution of aerosol optical properties and radiative effects across the Indo-Gangetic Plain during the SWAAMI-RAWEX campaign[J],2018,18(23):17669-17685.
APA Vaishya, Aditya.,Babu, Surendran Nair Suresh.,Jayachandran, Venugopalan.,Gogoi, Mukunda M..,Lakshmi, Naduparambil Bharathan.,...&Satheesh, Sreedharan Krishnakumari.(2018).Large contrast in the vertical distribution of aerosol optical properties and radiative effects across the Indo-Gangetic Plain during the SWAAMI-RAWEX campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),17669-17685.
MLA Vaishya, Aditya,et al."Large contrast in the vertical distribution of aerosol optical properties and radiative effects across the Indo-Gangetic Plain during the SWAAMI-RAWEX campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):17669-17685.
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