Impact of SST on the intensity prediction of Extremely Severe Tropical Cyclones Fani and Amphan in the Bay of Bengal

Mohan, Priyanka; Srinivas, C. V.; Yesubabu, V.; Rao, V. Brahmananda; Murthy, K. S. R.; Venkatraman, B.

doi:10.1016/j.atmosres.2022.106151

Cited by 7 publications

(4 citation statements)

References 81 publications

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“…Due to the large positive SST anomaly in the case of Amphan, as shown in Fig. 2 , the corresponding increment in vertical motion was produced (Reshmi Mohan et al 2022 ). The weak vertical shear and the atmospheric instability caused by the diabatic heating also enhanced the convection and vertical updraft (Naskar and Naskar 2021 ; Bhate et al 2023 ).…”

Section: Spatiotemporal Characteristics Of Amphan-related Parametersmentioning

confidence: 99%

“…In addition, the dynamic characteristics of Amphan itself also deserve attentions. For example, some previous studies focused on the rapid intensifying of Amphan (Reshmi Mohan et al 2022 ; Bhate et al 2023 ) 2 days before landfall with the specific environmental conditions in the BoB, which also made the intensity of Amphan continuously decreased to category-2 at its landfall, as shown in Fig. 1 .…”

Section: Introductionmentioning

confidence: 99%

“…As a tropical cyclone (TC) prone area, the Bay of Bengal (BoB) frequently suffers from relevant natural disasters and sustains great losses (Mohanty et al 2015 ; Chauhan et al 2018 ; Kumar et al 2020 ). In general, in late pre-monsoon (April and May) and in early post-monsoon (October and November), due to the warm pool phenomenon with other various dynamic processes such as large-scale circulations, air–sea interaction, and vortex-scale convective circulations (Kumar et al 2021 ; Reshmi Mohan et al 2022 ), about five TCs occur per year over this area (Najar and Salvekar 2010 ). With further favorable environmental conditions for TCs’ development and intensification, they often move towards land and cause destruction in local (Chauhan et al 2021b ).…”

Section: Introductionmentioning

confidence: 99%

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Dynamical characteristics of Amphan and its impact on COVID-19 cases in Bangladesh

Meng

Zhang

Liu

et al. 2023

Meteorol Atmos Phys

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In May 2020, a category-5 tropical cyclone (TC) Amphan formed in the Bay of Bengal and struck the coasts of India and Bangladesh. In this study, the relevant dynamic characteristics and aftermaths of Amphan are documented. Through detailed investigation of the reanalysis and observation data, spatiotemporal varying characteristics of the atmospheric and oceanic parameters during the Amphan propagation process were analyzed. Due to a wide range of high sea surface temperature anomaly, Amphan developed rapidly and ultimately led to the local heavy precipitation and strong winds in the coastal areas during its passage. It is also noted that the recorded wave height, wave period, and current speed all amplified when Amphan passed by and the characteristics of wave and current directions are also consistent with the temporal variation of the corresponding wind field. Meanwhile, Amphan occurred in accompany with the ongoing COVID-19 pandemic. In Khulna Division of Bangladesh, the number of newly confirmed COVID-19 cases increased rapidly after Amphan landing, which however was almost nil before the event, indicating there might exist a possible correlation between Amphan and the intensive outbreak of the local COVID-19, and particular attentions should be paid to deal with the multi-type, coexisting disasters if different or even conflicting measures are required.

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Section: Spatiotemporal Characteristics Of Amphan-related Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamical characteristics of Amphan and its impact on COVID-19 cases in Bangladesh

Meng

Zhang

Liu

et al. 2023

Meteorol Atmos Phys

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“…For instance, strong oceanic heat content (OHC) is observed during the RI (Busireddy et al, 2019; Deshpande et al, 2021; Roxy et al, 2020). The importance of ocean (such as sea surface temperature [SST] and tropical cyclone heat potential) and atmospheric (shear and moisture) conditions in the RI has also been established from the modelling studies (Bhalachandran et al, 2019; Lin et al, 2009; Mohan et al, 2022; Nadimpalli et al, 2023; Osuri et al, 2017). Similarly, Nekkali, Osuri, Das, and Niyogi (2022) have demonstrated the positive role of relative humidity and convective heating in RI onset and maintenance of consecutive RI periods.…”

Section: Introductionmentioning

confidence: 99%

On magnitudes of rapid intensification and destruction of tropical cyclones over the North Indian Ocean

Nekkali,

Osuri,

Mohapatra

2024

Intl Journal of Climatology

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The study targets long‐term analysis of rapid intensification (RI) magnitudes and destructiveness of tropical cyclones (TCs), as well as factors that are responsible for those magnitudes over the North Indian Ocean (NIO). Out of 131 TCs during 1990–2021, 50 TCs (38%) exhibited RI in their lifetime. Results indicate that the lifetime maximum intensity (LMI) and landfall intensity (LFI), along with the potential destructive index (PDI), are directly proportional (correlation coefficient > 0.8) to the lifetime maximum intensification rate. Most RI TCs (~80%) made landfall with an average LMI, LFI and PDI of 95 knots, 85 knots and 4 × 107 knot3, respectively. And the destructive indices are more than double compared to landfalling non‐RI TCs. Recent years have witnessed an increasing trend in RI magnitude and the frequent occurrence of very RI cases (intensity change ≥50 knots in 24 h). It infers that recent TCs have achieved RI and higher magnitudes in a short duration (~20 h). The higher intensification rates are promoted by lower wind shear as well as strong surface latent and sensible heat fluxes. The higher sea surface temperature by ~0.2°C, oceanic heat content by ~60 × 107 J·m−2, lower tropospheric humidity by ~0.2 g·kg−1 and moist static energy by ~6 × 106 J·m−2 in the recent period (2007–2021) supports higher intensification rates as compared to the earlier period (1990–2006). The deep‐layer wind shear has decreased by 1.0 m·s−1 in recent years, which supports higher RI magnitudes. This study highlights the risk associated with RI magnitudes and the efforts to be made for improved predictions of higher intensification rates.

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Relationship between south Asian summer monsoon intensity and north Indian ocean tropical cyclone activity

Wang,

Han,

Sun

et al. 2024

Clim Dyn

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Impact of SST on the intensity prediction of Extremely Severe Tropical Cyclones Fani and Amphan in the Bay of Bengal

Cited by 7 publications

References 81 publications

Dynamical characteristics of Amphan and its impact on COVID-19 cases in Bangladesh

Dynamical characteristics of Amphan and its impact on COVID-19 cases in Bangladesh

On magnitudes of rapid intensification and destruction of tropical cyclones over the North Indian Ocean

Relationship between south Asian summer monsoon intensity and north Indian ocean tropical cyclone activity

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