Influence of eddies and tropical cyclone heat potential on intensity changes of tropical cyclones in the North Indian Ocean

Jangir, Babita; Swain, Debadatta; Ghose, Samar Kumar

doi:10.1016/j.asr.2020.01.011

Cited by 39 publications

(35 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cyclonic and anticyclonic eddies significantly affect the intensity of the cyclone when the cyclones cross these eddies 1 . The warm-core eddy provides more warm water volume and thus aids intensification of the cyclone as the cyclone move over these eddies 36 . From Fig.…”

Section: Factors Controlling the Genesis And Rapid Intensification Ofmentioning

confidence: 99%

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

Singh

Roxy

Deshpande

2021

Sci Rep

View full text Add to dashboard Cite

Cyclone Fani, in April 2019, was the strongest pre-monsoon cyclone to form in the Bay of Bengal after 1994. It underwent rapid intensification and intensified quickly to an extremely severe cyclone. It maintained a wind speed of ≥ 51 m s−1 (≥ 100 knots) for a record time period of 36 h. The total lifespan of the cyclone was double than the climatological lifespan. Also, the duration of the cyclone in its extremely severe phase and the accumulated cyclone energy were significantly larger than the climatological records for the pre-monsoon season. In the current study, we investigate the ocean-atmospheric conditions that led to its genesis, rapid intensification and long lifespan. Our analysis shows that the Madden Julian Oscillation and anomalous high sea surface temperatures provided conducive dynamic and thermodynamic conditions for the genesis of cyclone Fani, despite forming very close to the equator where cyclogenesis is generally unlikely. Further, favourable ocean subsurface conditions and the presence of a warm core eddy in the region led to its rapid intensification to an extremely severe cyclone. A large area of warm ocean surface and subsurface temperatures aided the cyclone to maintain very high wind speed for a record time period. The vital role of the ocean surface and the subsurface in the genesis and the intensification highlights the need to efficiently incorporate ocean initial conditions (surface and sub-surface) and ocean–atmosphere coupling in the operational cyclone forecasting framework.

show abstract

Section: Factors Controlling the Genesis And Rapid Intensification Ofmentioning

confidence: 99%

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

Singh

Roxy

Deshpande

2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…On the contrary, when the cyclone passes over a cold core eddy it loses its intensity (Sreenivas and Gnanaseelan 2014). In the Bay of Bengal and the Arabian Sea, warm core eddies are generally more prominent in the pre-monsoon season than the post-monsoon season (Jangir et al 2020). During the period 2001-2018 about 40% of the cyclones in the north Indian Ocean were affected by warm core eddies, resulting in an intensification of the cyclones.…”

Section: Role Of Ocean Eddiesmentioning

confidence: 99%

A review of ocean-atmosphere interactions during tropical cyclones in the north Indian Ocean

Singh

Roxy

2022

Earth-Science Reviews

View full text Add to dashboard Cite

Section: Bay Of Bengal: the Cyclonic Hotbedmentioning

confidence: 99%

“…The North Indian Ocean witnesses about 12% of the total number of global cyclones with an average of 5 to 6 of them forming in the BoB and the Arabian Sea (AS) every year 5,6,7 . With high population density, the coastal areas spread across India, Bangladesh and Myanmar are socially and economically vulnerable to damages owing to cyclones 7 . The Indo-Gangetic Plains (IGP) in South East Asia is among the most densely populated (with more than 60% of India's population) and highly polluted regions in the world 8,9,10 .…”

Section: Bay Of Bengal: the Cyclonic Hotbedmentioning

confidence: 99%

Did COVID-19 Lockdown Brew “Amphan” into a Super Cyclone?

Vinoj¹,

Swain²

2020

Preprint

Self Cite

View full text Add to dashboard Cite

The world witnessed one of the largest lockdowns in the history of mankind ever, spread over months in an attempt to contain the contact spreading of the novel coronavirus induced COVID-19. As billions around the world stood witness to the staggered lockdown measures, a storm brewed up in the urns of the rather hot Bay of Bengal (BoB) in the Indian Ocean realm. When Thailand proposed the name “Amphan” (pronounced as “Um-pun” meaning ‘the sky’), way back in 2004, little did they realize that it was the christening of the 1st super cyclone (Category-5 hurricane) of the century in this region and the strongest on the globe this year. At the peak, Amphan clocked wind speeds of 168 mph (Joint Typhoon Warning Center) with the pressure drop to 925 h.Pa. What started as a depression in the southeast BoB at 00 UTC on 16th May 2020 developed into a Super Cyclone in less than 48 hours and finally made landfall in the evening hours of 20th May 2020 through the Sundarbans between West Bengal and Bangladesh. Did the impact of the COVID-19 induced lockdown drive an otherwise typical pre-monsoon tropical depression into a super cyclone?

show abstract

Influence of eddies and tropical cyclone heat potential on intensity changes of tropical cyclones in the North Indian Ocean

Cited by 39 publications

References 30 publications

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

A review of ocean-atmosphere interactions during tropical cyclones in the north Indian Ocean

Did COVID-19 Lockdown Brew “Amphan” into a Super Cyclone?

Contact Info

Product

Resources

About

Influence of eddies and tropical cyclone heat potential on intensity changes of tropical cyclones in the North Indian Ocean

Cited by 39 publications

References 30 publications

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

Role of warm ocean conditions and the MJO in the genesis and intensification of extremely severe cyclone Fani

A review of ocean-atmosphere interactions during tropical cyclones in the north Indian Ocean

Did COVID-19 Lockdown Brew &ldquo;Amphan&rdquo; into a Super Cyclone?

Contact Info

Product

Resources

About

Did COVID-19 Lockdown Brew “Amphan” into a Super Cyclone?