If no stringent actions are taken to reduce greenhouse gas emissions, the global average sea level may rise by around 8 feet by the year 2100 and 50 feet by the year 2300, as per a new study. The study, conducted by researchers at Rutgers University, Boston College and Nanyang Technological University, is published in the journal Annual Review of Environment and Resources.
With nearly 11 per cent of the 7.6 billion people across the globe living at places lesser than 33 feet above the sea level, the increasing global sea level will indeed pose a huge risk to the coastal populations, infrastructure, economies as well as ecosystems in the world, says the study. As per projections made for moderate greenhouse gas emissions, the global sea levels are estimated to rise from 1.4 to 2.8 feet by the year 2100, 2.8 to 5.4 feet by the year 2150, and 6 to 14 feet by the year 2300.
Location and time are the differentiating factors which affect sea level rise, and the researchers have created a few methods to analyze sea level changes to date and a range of future global projections. However, despite differing efforts, the clear picture emerging here is that from 2000 till 2050, the global sea level will likely rise by 6-10 inches but is unlikely to rise over 18 inches. After 2050, the projections are subject to any shift in greenhouse gas emission as well as to new efforts taken for projecting global sea level change.
For the study, researchers utilized case studies from New Jersey, Atlantic City as well as from Singapore to determine how the present approaches to reconstruct past sea-level change can compel projections for the future. Moreover, they also explained the methods for utilizing scientific global sea level projections as well as how precise projections can help raise new questions for sea level research.