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Observation-based 3-D view of aerosol radiative properties over Indian Continental Tropical Convergence Zone: Implications to regional climate

Jai Devi, J and Tripathi, SN and Gupta, T and Singh, BN and Gopalakrishnan, V and Dey, S (2011) Observation-based 3-D view of aerosol radiative properties over Indian Continental Tropical Convergence Zone: Implications to regional climate. Tellus, Series B: Chemical and Physical Meteorology, 63 (5). pp. 971-989.

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Abstract

Spatial vertical distributions of aerosol radiative properties over Indian Continental Tropical Convergence Zone (CTCZ) up to 6 km altitude during the pre-monsoon monsoon seasons of 2008 have been measured reported for the first time. Inter-seasonal intra-seasonal comparisons of different aerosol properties below above the boundary layer are carried out in among different regions of CTCZ. During pre-monsoon, aerosol layers were found to be present up to altitude as high as 6 km over the Indo-Gangetic Plains Himalayan foothills. A large increase in absorption coefficients (by two to five times) near the Himalayan foothills coastal India than the background values may be attributed to extensive biomass burning as supported by fire counts data. During monsoon, the aerosols were mostly confined to lower troposphere. However, absorbing aerosols were found to rebuild much faster than scattering aerosols after rains. Heating rates were very high over urban city of Bareilly peaking around 2 km during the pre-monsoon. The HR values over urban Kanpur during monsoon were comparable to Bareilly during pre-monsoon. Negligible latitudinal gradient of heating rate from the Himalayan foothill to central India was observed during both the seasons.

Item Type: Article
Additional Information: Copyright of this article belongs to Tellus
Uncontrolled Keywords: absorption; aerosol; biomass burning; boundary layer; convergence; latitudinal gradient; monsoon; observational method; radiative forcing; spatial distribution; three-dimensional modeling; troposphere, Bareilly; Gangetic Plain; India; Kanpur; Uttar Pradesh
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 10 Dec 2015 05:32
Last Modified: 10 Dec 2015 05:32
URI: http://moeseprints.incois.gov.in/id/eprint/2928

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