Warming SST of Bay of Bengal and decrease in formation of cyclonic disturbances over the Indian region during southwest monsoon season

Jadhav, S. K.; Munot, A. A.

doi:10.1007/s00704-008-0043-3

Cited by 48 publications

(35 citation statements)

References 10 publications

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“…On the other hand, observational studies identified a significant declining trend in TC (depression or above) frequency during the monsoon seasons over either northern Bay of Bengal (BB) (Rajeevan et al, 2000) or the entire BB (Patwardhan and Bhalme 2001;Rajendra Kumar and Dash, 2001;Jadhav and Munot, 2009) in spite of increasing SST in recent decades. Xavier and Joseph (2000) suggested a possible dependence of this recent decreasing TC frequency on vertical wind shear.…”

Section: Introductionmentioning

confidence: 99%

Interannual variations of tropical cyclone activity over the north Indian Ocean

Chan

2011

Intl Journal of Climatology

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An examination of the interannual variations of tropical cyclone (TC) activity over the North Indian Ocean during 1983-2008 has been carried out. The results suggest that instead of local sea surface temperatures, such variations, at least over the Bay of Bengal (BB) during October-November-December (OND), can be attributed to similar variations in the atmospheric flow patterns and moist static energy that are apparently forced largely by the El Niño/Southern Oscillation (ENSO). In an El Niño year, conditions for TC genesis and development, including 850-hPa relative vorticity, 200-850-hPa vertical shear of zonal wind, moist static energy, 500-hPa zonal wind, 500-hPa and 850-hPa geopotential height and 200-hPa divergence, are generally less favourable in BB and fewer intense cyclones are observed during OND. The reverse occurs during a La Niña event. However, causes of the variability of TC activity over BB during April-May-June and that over Arabian Sea have yet to be found, which may be due to the small sample size.

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Section: Introductionmentioning

confidence: 99%

Interannual variations of tropical cyclone activity over the north Indian Ocean

Chan

2011

Intl Journal of Climatology

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“…Joseph et al 2005;Shankar et al 2007;Babu et al 2007;Jadhav and Manout 2009). We selected two cyclone cases (Mala and Orissa super cyclones) considering that both of them are originated over the north Indian Ocean, intensified well and their landfall made tremendous destruction to the affected land areas.…”

Section: Tropical Cyclone Cases Selected For the Studymentioning

confidence: 99%

Impact of satellite observed microwave SST on the simulation of tropical cyclones

et al. 2011

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The impact of realistic representation of sea surface temperature (SST) on the numerical simulation of track and intensity of tropical cyclones formed over the north Indian Ocean is studied using the Weather Research and Forecast (WRF) model. We have selected two intense tropical cyclones formed over the Bay of Bengal for studying the SST impact. Two different sets of SSTs were used in this study: one from TRMM Microwave Imager (TMI) satellite and other is the weekly averaged Reynold's SST analysis from National Center for Environmental Prediction (NCEP). WRF simulations were conducted using the Reynold's and TMI SST as model boundary condition for the two cyclone cases selected. The TMI SST which has a better temporal and spatial resolution showed sharper gradient when compared to the Reynold's SST. The use of TMI SST improved the WRF cyclone intensity prediction when compared to that using Reynold's SST for both the cases studied. The improvements in intensity were mainly due to the improved prediction of surface latent and sensible heat fluxes. The use of TMI SST in place of Reynold's SST improved cyclone track prediction for Orissa super cyclone but slightly degraded track prediction for cyclone Mala. The present modeling study supports the well established notion that the horizontal SST gradient is one of the major driving forces for the intensification and movement of tropical cyclones over the Indian Ocean.

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“…Jadhav and Munot (2009) reported that the sea surface temperature (SST) in BB warmed up in the pre-monsoon and monsoon seasons. Warmer SST suggests that precipitable water over BB increased accordingly.…”

Section: Indexmentioning

confidence: 99%

Trends in Precipitation Characteristics in Bangladesh from 1950 to 2008

Endo

Matsumoto

Hayashi

et al. 2015

SOLA

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We analyzed trends in precipitation characteristics at 12 weather stations in Bangladesh using data from 1950 to 2008 and a non-parametric Mann-Kendall's tau test. It was found that the annual precipitation amount and the number of wet days tended to increase at almost all the stations. The number of days with weak precipitation (< 3 mm) showed increasing tendency; the number of days with daily precipitation exceeding 10 mm increased at three stations; and the number of days with daily precipitation exceeding 20 mm increased at two stations. Heavy rainfall index showed no clear trend, and was dominated by inter-annual and/or decadal variations. During the pre-monsoon season, seasonal precipitation amount and the number of wet days increased, and the number of days with weak precipitation (< 3 mm) also increased. Changes in the monsoon and post-monsoon seasons were insignificant.

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Warming SST of Bay of Bengal and decrease in formation of cyclonic disturbances over the Indian region during southwest monsoon season

Cited by 48 publications

References 10 publications

Interannual variations of tropical cyclone activity over the north Indian Ocean

Interannual variations of tropical cyclone activity over the north Indian Ocean

Impact of satellite observed microwave SST on the simulation of tropical cyclones

Trends in Precipitation Characteristics in Bangladesh from 1950 to 2008

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