Tag: Snow

Cryosphere - winter seasons, Northern and Southern Hemispheres
Seasonal variation in the extent of ice and snow cover is greatest in the Northern Hemisphere. Imagine the Earth with white caps on the top and bottom. The top cap increases by a factor of six from summer to winter, whil...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Major research stations in the Arctic
The Arctic is interesting for many types of researchers. For example, glaciologists study the ice and snow, while oceanographers look at the oceans. The ice, snow and oceans in the Arctic and Antarctic affect the global ...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Many of the largest rivers in the Himalayas Hindu Kush region are strongly dependent upon snow and glacial melt for waterflow
Except for the fact that glaciers are melting rapidly in many places, we do not have adequate data to more accurately project when and where water scarcity will affect irrigation schemes in full. Making accurate projecti...
02 Feb 2009 - by Ieva Rucevska, UNEP/GRID-Arendal
Arctic summer snow cover extent 1968-2008
The average snow cover extent during June, July and August across the Arctic (north of the polar circle) section of Eurasia and North America has decreased by 22,000 km2/year during 1968–2008.
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Advancement of phenological events in high-arctic Greenland
It is clear from lower latitudes that phenological trends are linked to temperature changes and experimental warming also results in earlier plant phenology. Yet, in Arctic and alpine ecosystems, the melting of the winte...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Reindeer herding - vegetation impacts (Norway and Finland)
A very high-resolution false color Ikonos-2 satellite image of Jauristunturit in the border zone shared by Norway and Finland. Image acquired 28 June 2001. The main vegetation type is lichen dominated tundra heath with d...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Polar bear sub-populations and pollution
There are thought to be between 20,000 and 25,000 bears in the world, which occur in19 relatively discrete sub-populations, some of which are shared between nations. Topping the food chain in the Arctic, the polar bear i...
13 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Arctic, topography and bathymetry (topographic map)
The Arctic represents the northermost area of the World, the Arctic Ocean and the land areas that surrounds it. The region is characterized but cold temperatures, and ice and snow. The summers are short, but with long pe...
01 Oct 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Permafrost distribution in the Arctic
Most of the Arctic is covered by ice and snow for more than eight and even up to twelve months a year, but conditions are highly variable, ranging from snow several metres deep each winter to the polar deserts of norther...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
A World of Salt
Global water type by percentage. Estimates of global water resources based on several different calculation methods have produced varied estimates. Shiklomanov in Gleick (1993) estimated that: - The total volume of wat...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
Seasonal patterns of precipitation and runoff
The infuence of glaciers on seasonal distribution of river fow is strongly dependent on annual temperature and precipitation cycles, and the proportion of the catchment occupied by glacier ice. Figure 4 compares precip...
06 Dec 2010 - by Riccardo Pravettoni
Snow Leopard range in Asia
The Snow Leopard inhabits the alpine and sub-alpine regions of Asia’s most spectacular mountain ranges. Occupying nearly 2 million km2, the snow leopard’s range extends across 12 range states from Russia and Mongolia t...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Previous | 1 2 3 4