ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 48 Issue 2 > 2022,48(2):245-253. DOI:10.7519/j.issn.1000-0526.2021.060401 Prev Next
Analysis of Interdecadal Variation of Super Cyclonic Storms over the North Indian Ocean in Autumn
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Abstract:
Based on the best-track data from Joint Typhoon Warning Center and ERA-interim 1°×1° reanal-ysis data in 1979-2018, this paper investigates the activity characteristics of super cyclonic storms that are formed over the North Indian Ocean in autumn. The results show that the number of super cyclonic storms in autumn over the North Indian Ocean increased significantly after 1998. The average maximum potential intensity (MPI) index of the North Indian Ocean in 1999-2018 was higher than that in 1979-1998. Compared with the conditions in 1979-1998, the higher average sea surface temperature and ocean heat content in 1999-2018 provided favorable conditions for the formation and development of super cyclonic storms. Moreover, weaker vertical wind shear, stronger water vapor flux and lower level cyclonic vorticity transport promoted the sustained growth of cyclonic storm intensity.
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