TN Likely to Witness 78 cm Rise in Sea Level by 2100

Study Shows Nagapattinam Most Vulnerable, Chennai Too at Risk

- SV Krishna Chaitanya @ Chennai

TAMIL Nadu could face a sea-level rise of up to 78.15 cm by 2100 under high-emission scenarios, a new study has projected. The research, published in Theoretical and Applied Climatology (2025), assessed risks along India's coastline using historical data and future climate models.

The study was led by A Ramachandran, Emeritus Professor at the Centre for Climate Change and Disaster Management, Anna University. He told TNIE that the team analysed satellite altimetry data from the US-based National Oceanic and Atmospheric Administration (NOAA) between 1992 and 2023, along with tide gauge records from the Permanent Service for Mean Sea Level (PSMSL).