Atmospheric black carbon: measurement and estimation of dry deposition
Abstract
Black carbon is an important constituent of fine particles having light absorbing properties and anthropogenic origin. It affects the atmospheric stability, hydrological cycles (regional circulation and rainfall pattern), change the albedo of cloud, damage the crop, disturb the ecosystem and affects the human health. In the atmosphere, it interacts with various components before it settling down to the earth surface through wet and dry deposition. Though understanding about this effects have increased manifold but none have paid attention towards characterization of dry deposition of black carbon and their mitigation. It needs both expertise to identify the problem along with the improvement of public understanding. In the present study dry deposition flux of black carbon on natural and surrogate surface, atmospheric concentration of black carbon and has been determined and deposition velocity has been estimated. The mean dry deposition flux of black carbon is 1.2 mg m-2 d-1 ranged from 0.01-11.8 mg m-2 d-1. The dry deposition of black carbon has been found to be higher on surrogate surfaces than natural surfaces. The annual mean mass concentration of BC is 8.9±3.3 μg m-3 ranged from 0.1-66.5 μg m-3.The dry deposition velocity has been calculated by dividing the flux by atmospheric concentration of black carbon. The average deposition velocity is 0.14 cm s-1. This study is first of its kind in India in which deposition flux of black has been determined and deposition flux has been found to be significantly different on different surfaces. Here, we provide a systematic survey based study related to black carbon emission and its mitigation through value based education. It provides the information gaps which could further help in an understanding of the effects of black carbon. A four step strategy of measurement and assessment, set standards, reduction of emission and implementation and execution to mitigate the effects of black carbon has been proposed. This is like 1-2-3-4 formulae to formulate the menace of black carbon emission, which can be achieved by raising the consciousness towards environment through value based education.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMGH43A..09G
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 3360 Remote sensing;
- ATMOSPHERIC PROCESSES;
- 0299 General or miscellaneous;
- GEOHEALTH