Spatio Temporal Analysis Of Swell Waves During FANI And TITLI Cyclones Using Empirical Orthogonal Function Analysis

Abstract

Intricate maritime state with the simultaneous incidence of swell, wind, and sea conditions generates high wave energies which impacts on air-sea interactions and the changing global climate. Swell waves in the ocean can often be surprisingly destructive which can cause serious damage to ships. In this study, the impact of the swell wave heights on the cyclonic wave heights occurring during reversing monsoon months was studied. TITLI was a very severe cyclonic storm (07 to 13 October 2018) and FANI was an extremely violent storm that cyclonic (26 April to 05 May 2019) over the Bay of Bengal (BOB). The impact of FANI occurring in May (pre-monsoon month) was more severe than TITLI in October (post-monsoon monsoon) over the east coast of India. Empirical orthogonal function (EOF) analysis was performed on the swell wave height data for the BOB region, to obtain the major spatial and temporal patterns prevailing. Combined wind and swell wave heights, only swell wave heights and only wind wave heights were analyzed during the cyclonic period to measure the impact of swell waves in the region.