Ocean and atmospheric characteristics associated with the cyclogenesis and rapid intensification of NIO super cyclonic storms during 1981–2020

Debashis Paul, Jagabandhu Panda () and Ashish Routray
Additional contact information
Debashis Paul: National Institute of Technology Rourkela
Jagabandhu Panda: National Institute of Technology Rourkela
Ashish Routray: Ministry of Earth Sciences

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2022, vol. 114, issue 1, No 11, 289 pages

Abstract: Abstract An attempt is made to investigate the various atmospheric and oceanic conditions that contributed to the genesis and rapid intensification (RI) of the super cyclonic storms (SUCS) formed over the north indian ocean (NIO) basin during 1982–2020. The vertical wind shear supported genesis, with values being weak to moderate in all cases. The Genesis potential parameter was> 30 in four out of six cases, whereas Gonu and Odisha SUCS had values ≤ 30. Equatorial Rossby (ER) wave was the dominant of all the convectively coupled equatorial waves (CCEWs), followed by Madden Julian Oscillation (MJO) before their genesis. In the case of Amphan, all the three CCEWs (i.e., MJO, ER, and Kelvin wave) were present. The ocean conditions were more conducive for tropical cyclone (TC) genesis than the atmospheric conditions. Both sea surface temperature and tropical cyclone heat potential (TCHP) supported the cyclogenesis. In most cases, the setting up of the pre-genesis scenario was heavily influenced by the ocean characteristics, whereas the atmospheric conditions were not that supportive. The environmental conditions that prevailed before RI showed the presence of thick warm waters, a sufficient supply of moisture at the middle of the troposphere, and moderate wind shear in all cases. Sea surface temperature, mid-tropospheric relative humidity, and low-level relative vorticity all had a substantial role in the RI process of all SUCS storms across the NIO basin. During the RI days, TCHP ≥ 60 kJ cm−2 was observed for Amphan and Gonu, with thick barrier layers for all cases. Gonu encountered a warm core eddy along its track, which provided extra fuel for the RI process. All six TCs are slow to moderate moving ones, which facilitated them to spend sufficient time over the ocean surface and interact with the warm waters to get positive feedback for the RI process.

Keywords: NIO; SUCS; Equatorial rossby waves; SST; Translational speed; Rapid intensification (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://link.springer.com/10.1007/s11069-022-05389-6 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:114:y:2022:i:1:d:10.1007_s11069-022-05389-6

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11069

DOI: 10.1007/s11069-022-05389-6

Access Statistics for this article

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk

More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().