Aerosol black carbon over Bay of Bengal, observed from an island location, Port Blair: temporal features and long-range transport

K. Krishna Moorthy; S. Suresh Babu

doi:10.1117/12.696109

8 December 2006 Aerosol black carbon over Bay of Bengal, observed from an island location, Port Blair: temporal features and long-range transport

K. Krishna Moorthy, S. Suresh Babu

Author Affiliations +

Proceedings Volume 6408, Remote Sensing of the Atmosphere and Clouds; 64080S (2006) https://doi.org/10.1117/12.696109
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

Continuous and near-real-time measurements of BC were made for a period of two years from the I-LARC (ISRO Laboratory for Aerosol Radiation and Chemistry) station in Port Blair as a part of the ISRO Geosphere Biosphere Programme (I-GBP). These are used to characterize BC, for the first time over the Bay of Bengal (BoB), which is surrounded by distinct landmasses having highly varying anthropogenic activities. Significantly high concentrations (~2.4 μg m^-3) occur during the period September to April. During this period, BC contributes ~ 6.5 % to the composite aerosol mass concentration. The concentration and its share to the composite aerosols decrease rapidly (by a factor of >3) and remain so during the period June to August when the station is under the influence of monsoon winds coming from the Indian Ocean. Back-trajectory analyses reveal five potential advection pathways, which are seasonal in nature and have a strong influence on the BC concentrations over the island. The results and their implications will be discussed.

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K. Krishna Moorthy and S. Suresh Babu "Aerosol black carbon over Bay of Bengal, observed from an island location, Port Blair: temporal features and long-range transport", Proc. SPIE 6408, Remote Sensing of the Atmosphere and Clouds, 64080S (8 December 2006); https://doi.org/10.1117/12.696109

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