Off the Deck

Off the Deck
Showing posts with label Antarctica. Show all posts
Showing posts with label Antarctica. Show all posts

Friday, January 22, 2016

Wednesday, October 24, 2012

Sea Level and the Environment: "Antarctica’s Weight-Loss"

From Ocean News and Technology, "New Understanding of Antarctica’s Weight-Loss":
Houseboat of San Francisco Bay
The rate of global sea level change is reasonably well-established but understanding the different sources of this rise is more challenging. Using re-calibrated scales that are able to ‘weigh’ ice sheets from space to a greater degree of accuracy than ever before, the international team led by Newcastle University has discovered that Antarctica overall is contributing much less to the substantial sea-level rise than originally thought.

Instead, the large amount of water flowing away from West Antarctica through ice-melt has been partly cancelled out by the volume of water falling onto the continent in the form of snow, suggesting some past studies have overestimated Antarctica’s contribution to fast-rising sea levels.
Oh, what exactly are the rates of sea level change? NOAA knows and reports here, from whence comes this graphic (which should enlarge if clicked upon):



You might note that rates of increase are measured in mm per year and feet per century.

The houseboat? A rising tide lifts all houses within the sea rise limits . . .

UPDATE: Changed image to a more user-friendly version