01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-04-0339 |
| Title of Abstract | Climate Variability over the North Indian Ocean: Insights from Observations and Satellite Datasets |
| Authors | Dr. S. D. Sanap* |
| Organisation | Climate Research and Services, IMD Pune |
| Address | Climate Research and Services, IMD Pune Pune, Maharashtra, India Pincode: 411005 E-mail: sakha.sanap@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | The climate variability over the North Indian Ocean has been examined using long-term weather observations recorded in the meteorological logbooks of the Indian Voluntary Observing Fleet (IVOF), along with additional weather reports from ships operating within India⿿s area of responsibility and transmitted by other WMO member states. These historical datasets have been systematically compared and validated against the International Comprehensive Ocean-Atmosphere Data Set (ICOADS) as well as recent satellite-derived products. To assess long-term changes, the climatology has been constructed and analyzed for three standard climatological periods: 1971⿿2000, 1981⿿2010, and 1991⿿2020. The analysis reveals that although the overall spatial and temporal climatological patterns have largely remained similar, significant differences in several key atmospheric and oceanic parameters are evident across the successive climatological periods. These differences highlight notable variability and shifts in atmospheric and oceanic parameters. In particular, the most recent climatology (1991⿿2020) indicates pronounced changes in both oceanic and atmospheric conditions compared to earlier baselines, pointing toward a robust signal of climate variability and potential long-term trends over the North Indian Ocean. The study documents these changes and cross-validation with other datasets (e.g., ICOADS and satellite observations). The variability and changes in oceanic and atmospheric parameters over the North Indian Ocean, together with their validation and inter-comparison, will be presented in detail. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Indian Ocean, Climate variability, Intercomparision |
| For Awards | no |