On the dynamics of cyclogenesis, rapid intensification and recurvature of the very severe cyclonic storm, Ockhi

Sanap, S. D.; Mohapatra, M.; Ali, M. M.; Priya, P.; Varaprasad, Devi

doi:10.1007/s12040-020-01457-2

Cited by 28 publications

(13 citation statements)

References 42 publications

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“…Chlorophyll increase is relatively higher closer to the coast, as compared to the open ocean (Wang and Zhao 2008). During Cyclone Nilofar, a twenty eight fold increase in the chlorophyll was observed after the passage of the cyclone (Ali et al 2020). Cyclone Ockhi in the 2017 post-monsoon season, induced chlorophyll blooms in the southeast Arabian Sea, which lasted for seven days after cyclone passage (Lü et al 2020).…”

Section: Ocean Biology In Response To the Cyclonementioning

confidence: 96%

“…This fueled the storm to intensify into a very severe cyclone (Krishna and Rao 2009). The genesis and rapid intensification of Cyclone Ockhi in November 2017 was also assisted by warm SSTs (>29°C) over a large area (Sanap et al 2020;Singh et al 2020). Similarly, the genesis of Cyclone Madi in December 2013 and that of Cyclone Phyan in November 2009 was fueled by very warm SSTs of about 29°C (Byju and Prasanna Kumar 2011;Rajasree et al 2016).…”

Section: Role Of Sstsmentioning

confidence: 99%

“…During this time, a maximum chlorophyll concentration is observed in the subsurface at about 40-60 m depth (Bhattathiri et al 1996). The passage of a cyclone significantly increases the surface chlorophyll by 3-8 mg m -3 (Subrahmanyam et al 2002;Naik et al 2008;Ali et al 2020). This increase in the chlorophyll is due to the strong vertical mixing and upwelling induced by the cyclone.…”

Section: Ocean Biology In Response To the Cyclonementioning

confidence: 99%

“…In the north Indian Ocean, intense cyclones move faster as compared to the less intense cyclones (Mohapatra and Sharma 2019). In the case of Cyclone Nilofar in the Arabian Sea, stronger cooling was observed when the cyclone has a lower translation speed (Ali et al 2020). This is because slow-moving cyclones have more time to interact with the ocean surface, leading to an increase in the upwelling, and generate inertial oscillations for a longer time that mixes the upper-ocean water column.…”

Section: Effect Of Cyclone Movement On the Oceancyclone Interactionmentioning

confidence: 99%

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

Singh

Roxy

2022

Earth-Science Reviews

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Section: Ocean Biology In Response To the Cyclonementioning

confidence: 96%

Section: Role Of Sstsmentioning

confidence: 99%

Section: Ocean Biology In Response To the Cyclonementioning

confidence: 99%

Section: Effect Of Cyclone Movement On the Oceancyclone Interactionmentioning

confidence: 99%

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

Singh

Roxy

2022

Earth-Science Reviews

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“…Recent studies on TC Ockhi described the causes for its rapid intensity changes (Singh et al., 2020), cyclogenesis and recurvature (Sanap et al., 2020), and biological ocean responses induced by the storm (Ganguly et al., 2020; Lü et al., 2020). However, none of those studies explored the role of the barrier layer resulting from the salinity stratification in modulating oceanic responses to TC Ockhi.…”

Section: Introductionmentioning

confidence: 99%

Distinct Oceanic Responses at Rapidly Intensified and Weakened Regimes of Tropical Cyclone Ockhi (2017)

et al. 2022

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Tropical cyclones (hereafter TC) are among the most destructive natural phenomena, resulting in human loss and property damage within a short period (Emanuel, 2003;Frank & Husain, 1971). With recent developments in satellite observations and numerical modeling, TC's track and intensity predictions have significantly improved (Le Marshall et al., 2002;Mohanty et al., 2019). However, rapid intensification (RI) and rapid weakening (RW) storms still provide major challenges to TC intensity predictability. RI can be defined as an increase of maximum sustained wind speeds at 10 m height by at least 30 kn (15.4 m s −1 ) in 24 hr, and RW can be defined as a comparable decrease in the same time interval (Kaplan & DeMaria, 2003;Wood & Ritchie, 2015). Studies carried out by Bhatia et al. (2019) and Emanuel (2017) showed ample evidence for increased occurrences of rapidly intensifying storms in the recent past, which may reflect ongoing global warming. The storm intensity is highly dependent on the underlying oceanic state as it fuels the TC's heat engine. Thus, it is crucial to understand

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Climate, trends and variability of extreme winds along the southwest coast of India

Abdulla,

Aboobacker,

Vethamony

2023

Intl Journal of Climatology

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The extreme wind climate and its trends and variability of the southwest coast of India, particularly the Kerala coast, are investigated using hourly reanalysis wind speeds for the period 1979–2021. The observed maximum wind speed and 99th percentile wind speed off Kerala coast are 21.0 and 11.3 m·s−1, respectively. The predominant direction of high wind speeds is in the SW–WNW sector, which accounts for 93.5% of the total high winds. Extreme wind speeds in this region are not due to tropical cyclones alone, but also due to seasonal high winds. Seasonally, the premonsoon and SW monsoon extreme winds are predominantly in the WSW–WNW directional sector, while postmonsoon strong winds are present in all directional sectors, but predominantly in the SSW–WNW sector, followed by the E–SSE sector. The 99th percentile wind speeds during premonsoon, SW monsoon and postmonsoon are 8.8, 12.3 and 8.9 m·s−1, respectively. A significant decreasing trend is observed in the 99th percentile wind speeds during 1979–2021, ranging from 3 to 6 cm·s−1·year−1 off Kerala coast. This is in contrast with global increasing extreme wind speeds, and it can be attributed to regional variability as well as weakening of the land–sea thermal gradients associated with rising surface temperature in the Arabian Sea in the light of global warming. In addition to the long‐term declining trend and monthly as well as seasonal features, distinct interannual variations are also noticed in the 99th percentile wind speeds. Analysis shows that the atmospheric teleconnections associated with El Niño–La Niña events and Indian Ocean Dipole have an important role in the variability of extreme wind speeds. The co‐occurrence of positive (negative) IOD with El Niño (La Niña) results in a sharp decline (increase) in extreme wind speeds. Significant decadal variations are also noticed in the 99th percentile wind speeds.

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On the dynamics of cyclogenesis, rapid intensification and recurvature of the very severe cyclonic storm, Ockhi

Cited by 28 publications

References 42 publications

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

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

Distinct Oceanic Responses at Rapidly Intensified and Weakened Regimes of Tropical Cyclone Ockhi (2017)

Climate, trends and variability of extreme winds along the southwest coast of India

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