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Proceedings Paper

Wintertime characteristics of aerosol black carbon at a North Indian station: role of boundary layer processes
Author(s): Vijayakumar S. Nair; Denny P. Alappattu; S. Suresh Babu; P. K. Kunhikrishnan; K. Krishna Moorthy
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Paper Abstract

Enhanced aerosol loading over the Indo-Gangetic Plain (IGP) is a regular feature during winter months. In addition to the environmental degradation and reduced visibility, these aerosols can cause significant radiative impact also. In view of this, a campaign mode observation under ISRO-GBP was conducted in December 2004 to characterize the aerosol properties over the IGP. As part of this, extensive measurements of aerosol BC were made from Kharagpur, an inland rural location lying at the eastern end of the Indo Gangetic Plain. It also lies close to several industrialized regions and area having lot of mining activities Results showed, extremely high BC concentration, often exceeding ~20 mg m-2, prevailed during December. During this period, BC concentration also showed large diurnal variation. Simultaneous measurements of the local atmospheric boundary layer height and wind fields revealed a very close association between the BC concentration and the ventilation coefficient (defined as the product of the boundary layer height and the transport wind). Back trajectory analyses using HYSPLIT revealed that in addition to the local boundary layer dynamics, the changes in the advection pathways also influence the concentration of BC.

Paper Details

Date Published: 8 December 2006
PDF: 9 pages
Proc. SPIE 6408, Remote Sensing of the Atmosphere and Clouds, 64080T (8 December 2006); doi: 10.1117/12.696114
Show Author Affiliations
Vijayakumar S. Nair, Vikram Sarabhai Space Ctr. (India)
Denny P. Alappattu, Vikram Sarabhai Space Ctr. (India)
S. Suresh Babu, Vikram Sarabhai Space Ctr. (India)
P. K. Kunhikrishnan, Vikram Sarabhai Space Ctr. (India)
K. Krishna Moorthy, Vikram Sarabhai Space Ctr. (India)


Published in SPIE Proceedings Vol. 6408:
Remote Sensing of the Atmosphere and Clouds
Si-Chee Tsay; Teruyuki Nakajima; Ramesh P. Singh; R. Sridharan, Editor(s)

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