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Title: Lidar observations on atmospheric dust transported from south-west Asia to Indian west coast region: A case study of colour rain event occurred during July 2001
Authors: Veerabuthiran, S
Satyanarayana, M
Issue Date: Jun-2003
Publisher: NISCAIR-CSIR, India
Abstract: A dust storm, which originated in the dust bowl of Arabia, Iran, Afghanistan, Pakistan and north-western of parts of India during the month of July 2001, had lifted large quantities of dust into the atmosphere and got transported over long distances. The region on the west coast of India had experienced the interesting phenomenon of ‘‘colour rain’’ due to this dust loading. A typical dust layer had been detected in the lower troposphere using a lidar system located at Trivandrum (8° 33'N, 77°E) during the night of 24 July 2001 prior to the occurrence of colour rain. The lidar measurements indicated that the dust cloud was present in the 4-5 km altitude range with thickness of a few hundred metres. Air back trajectory computed by the HYSPLIT-4 model using NCEP wind data at the 4500 m level clearly indicated that the dust probably had its origin in the south-west Asia, nine days before the event.
Page(s): 158-165
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.32(3) [June 2003]

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