Home » Environment » With thick ice gone, Arctic sea ice changes more slowly

Olduvai
Click on image to purchase

Olduvai III: Catacylsm
Click on image to purchase

Post categories

Post Archives by Category

With thick ice gone, Arctic sea ice changes more slowly

Beaufort Sea
Small remnants of thicker, multiyear ice float with thinner, seasonal ice in the Beaufort Sea on Sept. 30, 2016. Credit: NASA/GSFC/Alek Petty
› Larger view

The Arctic Ocean’s blanket of sea ice has changed since 1958 from predominantly older, thicker ice to mostly younger, thinner ice, according to new research published by NASA scientist Ron Kwok of the Jet Propulsion Laboratory, Pasadena, California. With so little thick, old ice left, the rate of decrease in ice thickness has slowed. New ice grows faster but is more vulnerable to weather and wind, so ice thickness is now more variable, rather than dominated by the effect of global warming.

Working from a combination of satellite records and declassified submarine sonar data, NASA scientists have constructed a 60-year record of Arctic sea ice thickness. Right now, Arctic sea ice is the youngest and thinnest its been since we started keeping records. More than 70 percent of Arctic sea ice is now seasonal, which means it grows in the winter and melts in the summer, but doesn’t last from year to year. This seasonal ice melts faster and breaks up easier, making it much more susceptible to wind and atmospheric conditions.

Working from a combination of satellite records and declassified submarine sonar data, NASA scientists have constructed a 60-year record of Arctic sea ice thickness. Right now, Arctic sea ice is the youngest and thinnest its been since we started keeping records. More than 70 percent of Arctic sea ice is now seasonal, which means it grows in the winter and melts in the summer, but doesn’t last from year to year. This seasonal ice melts faster and breaks up easier, making it much more susceptible to wind and atmospheric conditions.

…click on the above link to read the rest…

Olduvai IV: Courage
In progress...

Olduvai II: Exodus
Click on image to purchase

Click on image to purchase @ FriesenPress