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Role of upper ocean parameters in the genesis, intensification and tracks of cyclones over the Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title Role of upper ocean parameters in the genesis, intensification and tracks of cyclones over the Bay of Bengal
 
Creator Maneesha, K.
Sadhuram, Y.
Prasad, K.V.S.R.
 
Subject METEOROLOGY AND CLIMATOLOGY
METEOROLOGY AND CLIMATOLOGY
 
Description It is well known that the frequency of cyclones is about four times higher over the Bay of Bengal when compared with the Arabian Sea. Most of the severe cyclones during pre-monsoon (April and May) and post-monsoon (October and November) seasons hit the east coast of India, causing colossal loss of life and damage to property. In this study an attempt has been made to show the importance of the upper ocean parameters known as the upper ocean heat content (UOHC) and the UOHC with stratification (UOHCS). The UOHC has been computed considering the stratification parameter (S) for the first time. Most of the severe cyclones are forming over the UOHC range between 40–80kj/cm2 in the Bay of Bengal. The UOHCS was high ranging from 50–400kj/cmcm2 compared to the Pacific Ocean, which is due to high stratification (S ~2–4). Climatology of cyclone tracks and the UOHCS and in situ observation from Argo suggest that most of the tracks in the pre- and post-monsoon seasons are influenced by the high UOHCS (>120kj/cmcm2). UOHC and S are the dominant factors during the pre- and post-monsoon seasons, respectively. In addition to the atmospheric parameters from ocean-side, UOHC and stratification appear to be the best parameters to examine the intensification and movement of the cyclones during the pre- and post-monsoon seasons over the Bay of Bengal
 
Date 2016-01-08T06:46:55Z
2016-01-08T06:46:55Z
2015
 
Type Journal Article
 
Identifier Journal of Operational Oceanography, vol.8(2); 2015; 133-146
http://drs.nio.org/drs/handle/2264/4890
 
Language en
 
Rights © 2015 Institute of Marine Engineering, Science & Technology. The final and definitive form of the preprint has been published in the "Journal of Operational Oceanography". "Journal of Operational Oceanography" is available online at http://www.tandfonline.com with open URL of article : http://dx.doi.org/10.1080/1755876X.2015.1087185. The term & condition associated with this preprint is at http://www.tandfonline.com/page/terms-and-conditions
 
Publisher Institute of Marine Engineering, Science & Technology