Glaciar Bahía del Diablo
| Glaciar Bahía del Diablo | ||
|---|---|---|
| location | Vega Island ( Ross Islands , West Antarctica ) | |
| Type | Outlet glacier | |
| length | 7.6 km (2010) | |
| surface | 14.3 km² (2010) | |
| Exposure | Northeast | |
| Altitude range | 630 m - 50 m (2010) | |
| Coordinates | 63 ° 49 '12 " S , 57 ° 25' 48" W | |
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The Glaciar Bahía del Diablo is with a little more than 14.3 km² area a relatively small glacier on the Vega Island , which is in front of the Antarctic Peninsula in the immediate vicinity of its northeastern end. It is an outlet glacier from the ice cap , which covers about two thirds of the island. The glacier extends from about 630 to 50 meters in height and ends with a glacier tongue on land, about one kilometer from Devils Bay on the north coast of Vega Island. The tongue runs over a moraine , inside of which there is ice and which lies on a periglacial level with permafrost soil . The equilibrium line of the glacier is approximately 400 meters above sea level, where the mean annual temperature is between −7 ° C and −8 ° C.
Measurement of the mass balance
In the Antarctic , there are few areas where there are glaciers that end on land and therefore no tidewater glaciers are. This includes the Vega Island and its neighboring island, James Ross Island . Determining the mass balance using the glaciological method alone is only possible for glaciers that end on land, as otherwise the loss of mass due to calving would have to be taken into account. For this reason, and because there were already research stations near the glacier, a series of measurements was started by Argentine glaciologists at the end of 1999 . A visit to the glacier is only possible once a year, so it is not possible to differentiate between summer and winter balance. In each of the first ten years there was a negative mass balance, the greatest mass loss occurred in 2002 with −510 millimeters of water equivalent (mm WE), the average mean annual specific mass balance for the first 10 years was −307 mm. In the eleventh year, the 2009/2010 budget year, there was a positive mass balance of 370 mm WE for the first time since the start of the measurement series. It shows that there is a correlation with the air temperature and the annual precipitation.
Individual evidence
- ↑ a b c d WGMS: Fluctuations of Glaciers Database. World Glacier Monitoring Service, Zurich 2012 ( DOI: 10.5904 / wgms-fog-2012-11 ), accessed on February 7, 2013
- ↑ a b World Glacier Monitoring Service (WGMS): Glacier Mass Balance Bulletin No. 11 (2008-2009). Zurich 2011, pp. 15–18 ( online ( memento of the original dated November 2, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note .; PDF; 9.6 MB)
- ↑ glacierchange.wordpress.com: Northwest Vega Iceland, Antarctica Glacier Retreat. Retrieved May 2, 2013
