Tag: Sea

Projected temperature increases in the Arctic due to climate change, 2090 (NCAR-CCM3, SRES A2 experiment)
Climate change, due to increased concentrations of greenhouse gases in the atmosphere, has lead to increased temperatures and large scale changes in the Arctic. The Arctic sea ice is decreasing, permafrost thawing and th...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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
Carbon cycle
Living systems play a vital role in the carbon cycle. Photosynthesising organisms – mostly plants on land and various kinds of algae and bacteria in the sea – use either atmospheric carbon dioxide or that dissolved in se...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
East Siberian Arctic Shelf
The degradation of arctic sub-sea permafrost is already releasing methane from the massive, frozen, undersea carbon pool and more is expected with further warming.
27 Oct 2009 - by Laura Margueritte
Antarctic References
Images of Antarctica (left) and Greenland (right) to scale. Antarctica is 50 per cent larger than the United States or Europe. Greenland is 7 times smaller than Antarctica. There is enough ice in Antarctica to raise glob...
27 Oct 2009 - by Laura Margueritte
Global Sea-level Rise
The loss of ice from the Greenland Ice Sheet has increased and will contribute substantially to global sea level rise.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Gas Arctic
The temperature regime of sub-sea permafrost is determined by the annual temperature of the surrounding seawater, just like the thermal regime of terrestrial permafrost is determined by the arctic surface temperature.
27 Oct 2009 - by Laura Margueritte
Regional Variability in Sea-level Change
Regional variability in sea level change relative to the global average by the end of this century.
27 Oct 2009 - by Laura Margueritte
Radiation
Arctic sea ice and atmospheric circulation.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Average sea level 1900-2009
Sea-level rise is accelerating.
27 Oct 2009 - by Laura Margueritte
Concentration Extent
Reduced sea ice amplifies warming.
27 Oct 2009 - by Laura Margueritte
Regional Distribution of Sea-level Trends 1950-2003
Satellite altimetry data has revealed that sea level is not rising uniformly.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Current marine shipping uses in the Arctic
Biological invasions are known from around the globe but are relatively less known or studied in the Arctic. This secondary migration of invasives complicates ecological interactions as naturally occurring species from a...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Distribution and current trend of polar bear subpopulations throughout the circumpolar Arctic
Polar bears occur in 19 relatively discrete subpopulations with an estimated worldwide abundance of 20,000– 25,000 animals. Our knowledge of the status and trend of each subpopulation varies due to availability, reliabil...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Murre sensitivity to changes in temperature
Annual rates of population change of individual murre colonies during 12 years after the 1977 climatic regime shift in the North Pacific and during 9 years after the 1989 shift, in relation to changes in sea surface temp...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Distribution of common eider, breeding and wintering ranges in the Arctic
The common eider, Somateria mollissima, has a circumpolar distribution breeding mainly on small islands in Arctic and boreal marine areas in Alaska (Bering Sea region), Canada, Greenland, Iceland, western Europe, and the...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Arctic sea ice food web - schematic illustration
Sea ice represents a unique ecosystem in the Arctic, providing habitat to specialized iceassociated species that include microorganisms, fish, birds, and marine mammals. Individual species use sea ice in different ways d...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Ice coverage and primary production in the Arctic
Temperature changes may influence fish populations both directly, through shifts to areas with preferred temperature, and indirectly through the food supply and the occurrence of predators. The length of the ice-free per...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Location of datasets in the Arctic Species Trend Index (ASTI)
Dramatic changes, such as sea ice loss, are projected to occur in Arctic ecosystems over the next century. Understanding how the Arctic’s living resources, including its vertebrate species, are responding to these change...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Arctic terrestrial species trends 1970-2005 (ASTI)
Dramatic changes, such as sea ice loss, are projected to occur in Arctic ecosystems over the next century. Understanding how the Arctic’s living resources, including its vertebrate species, are responding to these change...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF