Tag: Snow

Jakobshavn Isbrae and ice fjord, showing locations of the calving ice front in years from 1851 to 2006, together with flow velocity observations
The glacier extends through the Illulisat Icefjord, surrounded by mountains. Icebergs calve off from the main glacier, pile up and block the fjord before being released into Qeqertarsuup Tunua (Disko) Bay and Davis Strai...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Estimates of people flooded in coastal areas in the 2080s as a result of sea-level rise and for given socio-economic scenarios and protection responses
The lines represent IPCC Special Report on Emissions Scenarios (SRES) based on different world views. The differences in impacts between the SRES scenarios for the same amount of sea-level rise and protection response re...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Climate feedbacks - the connectivity of the positive ice/snow albedo feedback, terrestrial snow and vegetation feedbacks and the negative cloud/radiation feedback
Feedback refers to the modification of a process by changes resulting from the process itself. Positive feedbacks accelerate the process, while negative feedbacks slow it down. Part of the uncertainty around future clima...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Anomalies in Northern Hemisphere Snow Cover
Snow cover extent has continued to decline and is projected to decline further, despite the projected increase in winter snowfall in some areas.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Trends in permafrost temperatures in the central and northern Mackenzie Valley, 1984-2006
Temperature monitoring in Canada indicates a warming of shallow permafrost over the last two to three decades. Since the mid-1980s, shallow permafrost (upper 20-30 m) has generally warmed in the Mackenzie Valley. The gre...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Major glacier hazard locations
Major glacier hazard locations
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic sea ice minimum extent in September 1982, 2005 and 2007
The red line indicates the median minimum extent of the ice cover for the period 1979–2000. This figure compares the Arctic sea ice extent in September for the years 1982 (the record maximum since 1979), 2005 and 2007 (t...
18 Apr 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Annual cycle of light in the Northern Arctic
The Arctic is often described as a place of utter darkness or white snow in winter and of midnight sun during the summertime. In fact, there are few places on Earth where the sun displays so much variation in colour due ...
17 May 2005 - by Beatrice Collignon, Sorbonne University
Melting snow on Kilimanjaro
At the February 2001 meeting of the American Association for the Advancement of Science (AAAS), researchers reported dramatic changes in the volume of ice capping the Kibo summit of Kilimanjaro.This graphic shows the est...
17 May 2005 - by Delphine Digout, UNEP/GRID-Arendal
Rapid retreat of glaciers in the Cordillera Blanca, Peru
There is now ample evidence of a major retreat of most mountain glaciers during the last 100 years in response to widespread increases in temperature. In recent decades, the rate of glacial recession has increased tremen...
17 May 2005 - by UNEP/GRID-Arendal
Quick retreat of the Santa Rosa glacier, Peru
Several mountain glaciers now disappear at a frightening rate as in the Santa Rosa glacier of Peru. A warmer climate often leads to increased precipitation. Much of the increased precipitation comes as rain instead of s...
17 May 2005 - by UNEP/GRID-Arendal
Cooling factors
The amount of aerosols in the air has direct effect on the amount of solar radiation hitting the Earth's surface. Aerosols may have significant local or regional impact on temperature. Water vapour is a greenhouse gas, b...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Total global saltwater and freshwater estimates
Estimates of global water resources based on several different calculation methods have produced varied estimates. This graphic illustrates the proportions of saltwater and freshwater that make up the earth's water resou...
17 May 2005 - by Philippe Rekacewicz, 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
Water towers of Asia - glaciers, water and population in the greater Himalayas-Hindu Kush-Tien Shan-Tibet region
The Himalayas–Hindu Kush, Kunlun Shan, Pamir and Tien Shan mountain ranges function as water towers, providing water to people through much of Asia. The glacier-fed rivers originating from the Himalaya mountain ranges su...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Climate change impact on mountain vegetation zones
The figure shows a comparison of current vegetation zones at a hypothetical dry temperate mountain site with simulated vegetation zones under a climate-warming scenario. Mountains cover about 20% of the Earth's continent...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Cooling factors
The amount of aerosols in the air has direct effect on the amount of solar radiation hitting the Earth's surface. Aerosols may have significant local or regional impact on temperature. Water vapour is a greenhouse gas, b...
17 May 2005 - by Philippe Rekacewicz, 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
Rising water levels in the Spitamen district (Tajikistan)
Sudden releases of water into the Spitamen district from Kyrgyzstan are regularly endangering the neighboring Tajik arable land downstream and villages along the river. The Tajik communities are convinced upstream Kyrgyz...
16 Mar 2006 - by Viktor Novikov, UNEP/GRID-Arendal
Mass balance of Maliy Aktru Glacier, Russian Altai
Measurements on this valley-type glacier in the North Chuyskiy Range show a slightly negative annual mass balance trend culminating in an ice loss of about 4 m water equivalent over the period 1964–2005.
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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