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| Abstract Submission No. | ABS-2022-04-0380 |
| Title of Abstract | Observation/characteristic of high-frequency coastal sea level variabilities along the Indian subcontinent using tide gauges |
| Authors | ROHITH B, Sreeraj P*, Anup N, Shanas PR |
| Organisation | IITM, Pune |
| Address | "Ocean Valley", Pragathi Nagar (BO), NIZAMPET hyderabad, Telangana, India Pincode: 500090 Mobile: 8008820852 E-mail: rohith.b@incois.gov.in |
| Country | India |
| Presentation | Poster |
| Abstract | Sea-level observations provide information on various processes occurring over different temporal and spatial scales that may contribute to coastal flooding and hazards. However, the research on sea-level extremes is restricted to hourly datasets, which prevent the quantification and analyses of shorter-period processes, like seiches, meteotsunamis, infragravity, and coastal waves, which may even dominate in low tidal basins. This study examines for the first time the intensity, frequency and temporal and spatial distribution of high-frequency (< 2 h) non-tidal and non-seismic sea-level variabilities along the entire Indian coastline using all available tide gauges having an interval of 1-minute. Here we use a quality control method similar to Zemunik et al. [2021], for creating an Indian Minute Sea-level dataset. The paper describes the data quality control procedures applied to the tide gauges. Preliminary analysis shows the existence of high-frequency oscillations (<2 hours) along the entire Indian coastline. The range of these oscillations are comparable with the climatological storm surge height at the west coast of India. Finally, an overview of all the existing major frequencies and its temporal and spatial distribution is described across the east and west coast of the Indian subcontinent. |