On the movement of tropical cyclone LEHAR

Handle URI:
http://hdl.handle.net/10754/626148
Title:
On the movement of tropical cyclone LEHAR
Authors:
Dasari, Hari Prasad ( 0000-0003-0628-4481 ) ; V, Brahmananda Rao; SSVS, Ramakrishna; Gunta, Paparao; N, Nanaji Rao; P, Ramesh Kumar
Abstract:
In this paper, an attempt has been made to delineate the physical processes which lead to the westward movement of the North Indian Ocean tropical cyclone LEHAR. The Advanced Weather Research and Forecasting (ARW) model is used to simulate LEHAR with 27 and 9 km resolutions. The results indicate that the model performed well in simulating the characteristics of cyclone compared with the Satellite and other observations. In addition to that all terms of the complete vorticity equation are computed to obtain the contribution of each term for the vorticity tendency. The vorticity tendency is calculated in four sectors, namely northwest, northeast, southwest and southeast and assumed that the cyclone moves from its existing location to the nearest point where the vortices tendency is maximum. It is noticed that the vorticity stretching term contributes most to the positive vorticity tendency. The second highest contribution is from the horizontal advection thus indicating the secondary importance of steering. The distribution of lightening flash rates also showing that the flash rates are higher in the SW and followed by NW sectors of the cyclone indicate more strong convective clouds are in SW sector. The equivalent potential temperatures (θe) at different stages of before, during and after the mature stage of the cyclone are also analysed and the analysis reveals that the wind-induced surface heat (WISH) exchange process is a plausible mechanism for the intensification of LEHAR.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Dasari HP, V BR, SSVS R, Gunta P, N NR, et al. (2017) On the movement of tropical cyclone LEHAR. Earth Systems and Environment 1. Available: http://dx.doi.org/10.1007/s41748-017-0025-7.
Publisher:
Springer Nature
Journal:
Earth Systems and Environment
Issue Date:
9-Nov-2017
DOI:
10.1007/s41748-017-0025-7
Type:
Article
ISSN:
2509-9426; 2509-9434
Sponsors:
The authors are thankful to India Meteorological Department for providing tropical cyclone observations. The authors acknowledge NCEP-GFS to avail the global forecasting fields on public domain. Authors are grateful to the MOES, Govt. of India for providing the funds vide reference MM/SERP/Andhra-Univ/201/IND-4/002/1307 for conducting this research.
Additional Links:
http://link.springer.com/article/10.1007/s41748-017-0025-7
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDasari, Hari Prasaden
dc.contributor.authorV, Brahmananda Raoen
dc.contributor.authorSSVS, Ramakrishnaen
dc.contributor.authorGunta, Paparaoen
dc.contributor.authorN, Nanaji Raoen
dc.contributor.authorP, Ramesh Kumaren
dc.date.accessioned2017-11-13T11:57:19Z-
dc.date.available2017-11-13T11:57:19Z-
dc.date.issued2017-11-09en
dc.identifier.citationDasari HP, V BR, SSVS R, Gunta P, N NR, et al. (2017) On the movement of tropical cyclone LEHAR. Earth Systems and Environment 1. Available: http://dx.doi.org/10.1007/s41748-017-0025-7.en
dc.identifier.issn2509-9426en
dc.identifier.issn2509-9434en
dc.identifier.doi10.1007/s41748-017-0025-7en
dc.identifier.urihttp://hdl.handle.net/10754/626148-
dc.description.abstractIn this paper, an attempt has been made to delineate the physical processes which lead to the westward movement of the North Indian Ocean tropical cyclone LEHAR. The Advanced Weather Research and Forecasting (ARW) model is used to simulate LEHAR with 27 and 9 km resolutions. The results indicate that the model performed well in simulating the characteristics of cyclone compared with the Satellite and other observations. In addition to that all terms of the complete vorticity equation are computed to obtain the contribution of each term for the vorticity tendency. The vorticity tendency is calculated in four sectors, namely northwest, northeast, southwest and southeast and assumed that the cyclone moves from its existing location to the nearest point where the vortices tendency is maximum. It is noticed that the vorticity stretching term contributes most to the positive vorticity tendency. The second highest contribution is from the horizontal advection thus indicating the secondary importance of steering. The distribution of lightening flash rates also showing that the flash rates are higher in the SW and followed by NW sectors of the cyclone indicate more strong convective clouds are in SW sector. The equivalent potential temperatures (θe) at different stages of before, during and after the mature stage of the cyclone are also analysed and the analysis reveals that the wind-induced surface heat (WISH) exchange process is a plausible mechanism for the intensification of LEHAR.en
dc.description.sponsorshipThe authors are thankful to India Meteorological Department for providing tropical cyclone observations. The authors acknowledge NCEP-GFS to avail the global forecasting fields on public domain. Authors are grateful to the MOES, Govt. of India for providing the funds vide reference MM/SERP/Andhra-Univ/201/IND-4/002/1307 for conducting this research.en
dc.publisherSpringer Natureen
dc.relation.urlhttp://link.springer.com/article/10.1007/s41748-017-0025-7en
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1007/s41748-017-0025-7en
dc.subjectTropical cycloneen
dc.subjectNorth Indian oceanen
dc.subjectWestward movementen
dc.subjectVorticity tendencyen
dc.subjectLightening flashesen
dc.titleOn the movement of tropical cyclone LEHARen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalEarth Systems and Environmenten
dc.eprint.versionPost-printen
dc.contributor.institutionCPTEC–INPE, Cachoeira Paulista, Brazilen
dc.contributor.institutionDepartment of Meteorology and Oceanography, Andhra University, Visakhaptnam, Indiaen
kaust.authorDasari, Hari Prasaden
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