Soni, Kirti and Kapoor, Sangeeta and Parmar, Kulwinder Singh (2014) Long-term Aerosol Characteristics over Eastern, Southeastern, and South Coalfield Regions in India. Water, Air, and Soil Pollution, 225 (1). ISSN 0049-6979

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Abstract

Natural and anthropogenic aerosols over coal mines regions in India play a significant role in influencing the regional radiation budget, causing climate implications to the overall hydrological cycle of India. In the reference of regional climate change and air quality, we discuss aerosol optical depth (AOD) variability and long-term trends (from Mar 2000-Dec 2012) over eastern, southeast, and south coalfield regions in India. The present work analyses the variations and trends in aerosol loading using Terra-MODIS (Moderate-Resolution Imaging Spectroradiometer) AOD(550) data in the period 2000-2012. Overall, an increasing trend in AOD(550) has been observed over all regions namely Raniganj (7.31 %) in eastern and Korba (5.0 %) in southeast, and Godavari Valley (32 %) in the south coalfield region in India. This increasing trend predominantly owes to a constant increase in the seasonal/monthly averaged AOD during the winter (Dec-Feb) and post-monsoon (Oct-Nov) seasons dominated by anthropogenic emissions. In contrast, a decreasing trend is observed during pre-monsoon (Mar-May) season over eastern coalfield region (-13 %), while at south coalfield region (44 %) and southeastern coalfield region (0.8 %), increasing trends are observed. Similarly, increasing trends is observed over all regions in monsoon (Jun-Sep) months. Furthermore, the values of Hurst exponent, fractal dimension, and predictability index for AODs are 0.5, 1.5, and 0, respectively suggesting that the AODs in all sites follow the Brownian time series motion (true random walk). High AOD values (0.59+/-0.21) are observed over eastern region Raniganj.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer Verlag.
Uncontrolled Keywords:	Trends Aerosols Coal mines India
Subjects:	Meteorology & Atmospheric Sciences Water Resources
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	19 Oct 2015 11:04
Last Modified:	19 Oct 2015 11:04
URI:	http://npl.csircentral.net/id/eprint/1379

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