Numerical simulation of storm surge envelopes associated with the recent severe cyclones impinging on the east and west coasts of India

Ghosh, Sujit K.; Dewan, B. N.; Singh, Bikram

doi:10.54302/mausam.v34i4.2513

Cited by 10 publications

(1 citation statement)

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“…Many scientists were successfully adopted GCM models in simulating the level of inundation but remain poorly understand the coastline structures with the de nite progressions of wave circulation, breaking, and interface (Sielecki and Wurtele, 1970;Flather and Heaps, 1975). On the other hand, Ghosh et al (1983), Flather and Khandaker (1987), Katsura et al (1992) were able to develop some numeral models to simulate storm surges of BoB. Additionally, Esteban et al (2005) applied both PCA and clustering in daily sea-level pressure rotations and found that snowfall was less than 30 cm per day patterns.…”

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confidence: 99%

Synoptic climatology of weather parameters associated with tropical cyclone events in the coastal areas of Bay of Bengal

Badhan

Farukh

Hossen

et al. 2022

Theor Appl Climatol

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Tropical cyclones (TCs) are the most devastating weather phenomena that trigger massive loss of property and life in the coastal areas of the Bay of Bengal (BoB). Scienti c understanding of TCs occurrence can aid policy-makers and residents in coastal areas to take necessary actions and appropriate planning in advance. In this study, we aimed to examine the possible linkage of weather parameters with deadly 22 TCs events in the BoB from 1975 to 2014 using principal component analysis, K-mean clustering and General circulation model (GCMs). Results showed that among 22 TCs, cluster 1 belongs to 12 TCs which occurred under the same atmospheric situation when the sea level pressure (SLP) was below 990hPa, and the temperature ranged from 300C to 390C. A deep negative anomaly of SLP and temperature was observed up to 500hPa levels. In contrast, a negative depression was found at 300hPa geopotential height (GPH) over the study area. Cluster 2 consisted of 9 TCs when SLP was below 1000hPa, and the average temperature was 33.50C. A strong negative anomaly was noticed when surface level up to 500 hPa GPH, but dramatically this depression was completely absent at 300hPa geopotential height over the BoB and entire coastal region. Cluster 3 contained only 1 TCs when the atmospheric circumstance was completely diverse, and the SLP was above 1000hPa. The results of the GCM model revealed that the SLP was lower, and the temperature was higher over BoB compared to the North Indian Ocean. We identi ed the larger depression of SLP and unpredictable temperature anomalies at the upper atmosphere that can trigger an enormous unpredictability throughout the atmospheric level, leading to severe TCs. The outcomes of this study can improve our understanding of weather variables in the upper atmospheric column for forecasting the TCs system more accurately in the future.

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confidence: 99%

Synoptic climatology of weather parameters associated with tropical cyclone events in the coastal areas of Bay of Bengal

Badhan

Farukh

Hossen

et al. 2022

Theor Appl Climatol

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Joint probability risk modelling of storm surge and cyclone wind along the coast of Bay of Bengal using a statistical copula

Bushra

Trepanier

Rohli

2019

Intl Journal of Climatology

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High winds and storm surges associated with torrential rain from tropical cyclones (TCs) cause massive destruction to property and cost the lives of many people. The coastline of the Bay of Bengal (BoB) ranks as one of the most susceptible to storm surges in the world due to low-lying elevation and a high frequency of TC occurrence. This study uses data from 1885 to 2011 and a bivariate statistical copula to describe the relationship and dependency between empirical TC storm surge and reported wind speed before landfall at the BoB. Among the copulas and their families, an Archimedean, Gumbel copula with margins defined by the empirical distributions is specified as the most appropriate choice for the BoB. The model provides return periods for pairs of TC storm surge and 12-hr pre-landfall wind along the BoB coastline. On the shortest timescale, the BoB can expect a TC with 12-hr pre-landfall winds of at least 24 m/s and surge heights of at least 4.0 m, on average, once every 3.9 years. On the other hand, the long-term, worst case scenario suggests the BoB can expect 12-hr pre-landfall winds of 62 m/s and surge heights of at least 8.0 m, on average, once every 311.8 years. Using a copula to model the combined frequency of cyclone wind speeds along with storm surges along the BoB coastline increases the understanding of the dangerous TC characteristics in this region, which can reduce fatalities and monetary losses.

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Analysis of Morphodynamics of Bhasan Char Island of Bangladesh Using Time Series Satellite Data and Its Vulnerability to Cyclones

Dutta

Kumar

Jayaram

et al. 2022

Transforming Coastal Zone for Sustainable Food and Income Security

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Numerical simulation of storm surge envelopes associated with the recent severe cyclones impinging on the east and west coasts of India

Abstract: Envelopes of storm surges generated by the Porbandar cyclone of 1975, Andhra Pradesh cyclone of 1977 and Pamban cyclone of 1978 are simulated on the computer. The locations and the magnitudes of peak storm surges are found to be in good agreement with observations.

Cited by 10 publications

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Synoptic climatology of weather parameters associated with tropical cyclone events in the coastal areas of Bay of Bengal

Synoptic climatology of weather parameters associated with tropical cyclone events in the coastal areas of Bay of Bengal

Joint probability risk modelling of storm surge and cyclone wind along the coast of Bay of Bengal using a statistical copula

Analysis of Morphodynamics of Bhasan Char Island of Bangladesh Using Time Series Satellite Data and Its Vulnerability to Cyclones

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