Chatterjee, A and Dutta, C and Sen, S and Ghosh, K and Biswas, N and Ganguly, D and Jana, TK (2006) Formation, transformation, and removal of aerosol over a tropical mangrove forest. Journal of Geophysical Reesearch-Atmospheres , 111 (D24). ISSN 0148-0227

PDF - Published Version
Download (696Kb) | Preview


A comprehensive size-segregated characterization of the chemical properties (watersoluble inorganic fraction) of the sea-salt aerosol originated from the surf zone at the land-ocean boundary of Sundarban Mangrove forest, NE coast of Bay of Bengal, and an analysis of the relevant meteorological parameters revealed how the combined effect of anthropogenic gases and aerosol advected to the virgin mangrove forest and micrometeorological conditions could change the marine character of the aerosol before the onset of SW monsoon. The average aerosol mass concentration was 99.94 +/- 41.9 mu g m(-3) with production rate of 0.19 mu g m(-2)s(-1) ( during January) to 4.29 mu g m(-2)s(-1) ( during April) and dry deposition rate of 0.019 mu g m(-2) s(-1) ( during January) to 13.21 mu g m(-2) s(-1) ( during June). 72.35% of the total aerosol mass was leachable by water, and relatively large concentrations of phosphorus were observed. More chloride depletion from the coarse (2.0 < dp < 10 mu m) and nucleation (d(p)< 0.4 mu m) modes compared to the accumulation mode (0.4 < d(p)< 2.0 mm) was observed in winter (Cl/Na = 0.6023 +/- 0.1798), and a reverse trend was observed in summer (Cl/Na = 0.644 +/- 0.262). A significant positive correlation was obtained for chloride loss with non-sea-sulphate and nitrate for particles > 2.0 mu m. Distributions of Na+, K+, Ca2+, Mg2+, NH4+, Cl-, NO2-, NO3-, SO42-, and PO43- in different size modes were considered to collate their source apportionment. The proximity of Calcutta and Haldia metropolis to the mangrove forest could influence the forest air quality and depositional processes.

Item Type: Article
Uncontrolled Keywords: Atmospheric Sea Salt; Chemical-Composition; Sundarban Mangrove; Particle Formation; Size Distribution; Dry Deposition; Northeast Coast; Carbon-Dioxide; Boundary-Layer; Indian-Ocean
Subjects: Basic Science
Depositing User: Dr Chandana Patra
Date Deposited: 27 Dec 2011 06:39
Last Modified: 28 Mar 2018 09:18

Actions (login required)

View Item View Item