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Title: Oceansat-1 derived met-ocean parameters during various stages of monsoon depression of June 1999, along Orissa coastline, east coast of India
Authors: Khaladkar, R M
Mahajan, P N
Narkhedkar, S G
Nair, Sathy
Keywords: Oceansat-1;Met-ocean parameters;Monsoon depression
Issue Date: Jun-2004
Publisher: CSIR
IPC Code: Int. Cl. ⁷ G01W 1/00
Abstract: After the launch of Oceansat-1 (IRS-P4) on May 26, 1999, weather scientists got the opportunity to study some of the meteorological and oceanographic (met-ocean) parameters associated with the weather systems formed over the oceanic regions around India, even under cloudy conditions. Oceansat-1 carries multifrequency scanning microwave radiometer (MSMR) which has a capability to provide information of certain parameters viz. sea surface wind speeds (SSW), sea surface temperature (SST), integrated water vapour (IWV) and cloud liquid water content (CLW). A monsoon depression was formed over the Bay of Bengal on 17 June 1999 causing widespread rainfall over Orissa coast and the adjoining regions. Oceansat-1 derived met-ocean parameters were studied during various stages of this depression. The maximum values of these parameters during the life cycle of the depression over the Bay of Bengal were SST : 30º - 31º C, SSW : 16-18 m/s, IWV : 7.0 g/cm², CLW : 90-100 mg/cm². It was observed that SSW, IWV and CLW show high values one to three days before the formation of the depression. High values, shape and steep gradients of the met-ocean parameters give prior indication of formation/intensification of the weather system and its probable location. SST reduced by about 1º-2º after the passage of the low pressure system over the region.
Page(s): 113-121
ISSN: 0379-5136
Appears in Collections: IJMS Vol.33(2) [June 2004]

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