HONG KONG: In a warming world, we know ocean levels are likely to rise, but just how much?
There’ve been a lot of estimates cited in recent years, based on how rising temperatures are expected to interact with Earth’s current ice caps, but new research published this week attempts to predict the future by looking at the past.
And it doesn’t look good. According to scientists at the University of Florida, the last time global temperatures were this high, the sea levels rose as much as six metres.
“While this amount of sea-level rise will not happen overnight, it is sobering to realize how sensitive the polar ice sheets are to temperatures that we are on path to reach within decades,” lead researcher Andrea Dutton said in a release from the university.
The researchers say the last time sea levels were more than six metres higher than today was around 125,000 years ago, when global temperatures were 1oC higher than pre-industrial levels, or more or less close to today’s level. They were at that level also around 400,000 years ago, when global temperatures were as much as 2oC higher than the preindustrial average.
Our own prognosis looks even worse when you look at carbon levels. The researchers say carbon levels during previous eras of higher sea levels peaked at 280 parts per million. Today’s levels are around 400 ppm, and still rising.
Dutton says even if current climate negotiations succeed in limiting global temperature rise to 2oC, that could still be enough to trigger that level of sea rise.
Pakistan to get $3b loan from Islamic Trade Financing Corporation
ISLAMABAD: Islamic Trade Financing Corporation (ITFC) to provide Pakistan with a $3 billion loan, according to an official statement released...
