Arctic sea ice has reached its lowest winter point since satellite observations began in the late 1970s, raising concerns about faster ice melt and rising seas due to global warming, US officials said Thursday.
Scientists have for the first time recorded the feeding behaviour of Antarctic minke whales under the sea ice and found that the mammals lunge feed up to 100 times per hour, gorging on Antarctic krill.
Researchers using a modeling study have suggested that the Antarctica`s Ross Sea`s recent observed increase in summer sea-ice cover is likely to be short-lived, with the area projected to lose more than half its summer sea ice by 2050 and more than three quarters by 2100.
The sea level is rising faster than expected and may cross one metre mark by the end of this century -- double that of the estimates made by the Intergovernmental Panel on Climate Change in 2007, says a study.
The area of the Arctic Ocean covered by floating sea ice is likely to hit a record low next week, with the melting due to continue well into September, researchers monitoring the region by satellite have revealed.
Geologists have found evidence that sea ice extended to the Equator 716.5 million years ago, which gives weight to the theory of a "snowball Earth" event long suspected to have taken place around that time.