Record Details

Why is the Bay of Bengal experiencing a reduced rate of sea surface warming?

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Why is the Bay of Bengal experiencing a reduced rate of sea surface warming?
 
Creator DeMello, J.R.
PrasannaKumar, S.
 
Subject METEOROLOGY AND CLIMATOLOGY
CHEMISTRY AND BIOGEOCHEMISTRY
OCEANOGRAPHY AND LIMNOLOGY
METEOROLOGY AND CLIMATOLOGY
 
Description The sea surface temperature (SST) in the Bay of Bengal (BoB) during the period 1960–1995 showed a decadal cycle, riding over a warming trend. The disruption of the decadal cycle was noticed post-1995 and was followed by a slowdown in the sea surface warming. The cause for the disruption of the SST decadal cycle was the weakening of the link between SST and sunspot number. The rising trend in the SST is due to the increasing atmospheric CO2 concentration. The post-1995 SST slowdown was due to the increasing influence of the number of depressions, cyclones and severe cyclones in the BoB, the occurrence of which showed an upward trend. Using Price–Weller–Pinkel model we show that cyclonic systems deepen the mixed-layer through enhanced mechanical-mixing with cooler sub-surface waters, thereby reducing the mixed-layer temperature and consequently the SST. This process opposes the SST rise due to increasing atmospheric CO2 concentration. The net effect of the wind-mixing caused by the increased number of depressions, cyclones and severe cyclones and the increased CO2concentration is a SST slowdown in the BoB. This mechanism differs from the SST slowdown mechanisms suggested for the Atlantic and the Pacific
 
Date 2016-04-11T06:04:43Z
2016-04-11T06:04:43Z
2016
 
Type Journal Article
 
Identifier International Journal of Climatology, vol.36(3); 2016; 1539-1548
no
http://drs.nio.org/drs/handle/2264/4942
 
Language en
 
Relation Int_J_Climatol_36_1539.jpg
 
Rights This is a preprint of an article published in [International Journal of Climatology, DOI: 10.1002/joc.4414]”and located at the following Wiley URL: http://onlinelibrary.wiley.com/doi/10.1002/joc.4414/abstract. Copyright[2015] Royal Meteorological Society
 
Publisher Royal Meteorological Society