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An early South Asian dust storm during March 2012 and its impacts on Indian Himalayan foothills: A case study

Srivastava, AK and Soni, VK and Singh, S and Kanawade, VP and Singh, N and Tiwari, S and Attri, SD (2014) An early South Asian dust storm during March 2012 and its impacts on Indian Himalayan foothills: A case study. Science of the Total Environment, 493. pp. 526-534.

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Abstract

The impacts of an early South Asian dust storm that originated over the western part of the Middle East and engulfed northwest parts of India during the third week of March 2012 have been studied at four different stations covering India and Pakistan. The impacts of this dust storm on aerosol optical properties were studied in detail at Delhi, Jodhpur, Lahore and Karachi. The impact could also be traced up to central Himalayan foothills at Manora Peak. During dust events, the aerosol optical depth (AOD) at 500. nm reached a peak value of 0.96, 1.02, 2.17 and 0.49 with a corresponding drop in à ngström exponent (AE for 440-870. nm) to 0.01, 0.02, 0.00 and 0.12 at Delhi, Jodhpur, Lahore and Karachi, respectively. The single scattering albedo (SSA) at 675. nm was relatively lower at Delhi (0.87) and Jodhpur (0.86), with absorption à ngström exponent (AAE) less than 1.0, but a large value of SSA was observed at Lahore (0.98) and Karachi (0.93), with AAE value greater than 1.0 during the event. The study of radiative impact of dust aerosols revealed a significant cooling at the surface and warming in the atmosphere (with corresponding large heating rate) at all the stations during dust event. The effect of this dust storm was also seen at Manora Peak in central Himalayas which showed an enhancement of ~. 28 in the AOD at 500. nm. The transport of dust during such events can have severe climatic implications over the affected plains and the Himalayas.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Aerosols; Atmospheric aerosols; Atmospheric radiation; Dust, Aerosol optical depths; Aerosol optical property; Aerosol properties; Asian dust storm; Himalayas; Radiative forcings; Radiative impacts; Single scattering albedo, Storms; Aerosols, aerosol property; albedo; dust storm; optical depth; radiative forcing; absorption efficiency; atmospheric transport; scattering; warming, absorption Angstrom exponent; aerosol; aerosol optical depth; article; atmosphere; case study; cooling; dust; dust storm; environmental factor; environmental impact; heating; India; priority journal; reference value; statistical parameters; surface property; warming; aerosol optical property; Article; climate; controlled study; geographic and geological phenomena; greenhouse effect; Indian Himalayan foothill; meteorological phenomena; Middle East; Pakistan; physical parameters; single scattering albedo, Delhi; Himalayas; India; Jodhpur; Karachi; Lahore; Manora Peak; Pakistan; Punjab Pakistan; Rajasthan; Sind; Siwalik Hills; Uttarakhand; Middle East
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 11 Dec 2014 10:42
Last Modified: 11 Dec 2014 10:42
URI: http://moeseprints.incois.gov.in/id/eprint/864

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