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Incredives
17 Aug 2021
Indian coastal areas will face a sea level rise of 0.1 metre to 0.3 metre in the next two to three decades due to global warming, with Bhavnagar in Gujarat facing a rise of 0.22 metres that may submerge vast low-lying areas, a projection by Nasa has said.
The sea-level rise and its impact will be experienced in varying degrees in other coastal cities and ports such as Kochi, Mormugao, Mumbai, Mangalore, Chennai, Vizag and Paradip during the period, shows an online visualization tool of the US space agency using projections from the latest report of the UN’s Intergovernmental Panel on Climate Change.
• NASA’s Sea Level Change Team has created a sea level projection tool that visualizes future sea level rise from the IPCC’s findings.
• Global mean sea level increased by 0.20m between 1901 and 2018.
• Relative to 1995-2014, the likely global mean sea level rise by 2100 will be 0.28-0.55m under a very low greenhouse gas emissions scenario and 0.98-1.88m under the very high scenario, IPCC has projected
• Sea level around Asia in the North Indian Ocean has increased faster than global average, with coastal area loss and shoreline retreat. Regional mean sea level will continue to rise.
• By 2040, Mumbai’s sea level will rise by 0.12m compared to 0.4m in 2020; at Hiron Point in Sundarbans sea level will rise to 0.17m compared to 0.6m in 2020; Chennai will see a 0.10m rise compared to 0.3m in 2020 ; Cochin will likely see a sea level rise of 0.15m compared to 0.6m; Bhavnagar 0.22m compared to 0.8m in 2020. These projections are based on an intermediate emission scenario where emissions have fallen globally but not to very low levels. The IPCC considers five socioeconomic Pathways (SSPs) which are essentially possible paths of growth human societies could follow over the next century.
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