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Tag: Tundra

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
Trends in Arctic vegetation productivity 1982-2005 (Greening of the Arctic)
Arctic vegetation has undergone enormous change in the past, most notably in response to the glacial and interglacial periods of the Quaternary. Data from many sources and at several scales suggest that recent climate ch...
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
Distribution and trends of wild Rangifer in the Arctic
Distribution and observed trends of wild Rangifer populations throughout the circumpolar Arctic (from The Circum Arctic Rangifer Monitoring and Assessment Network, CARMA). Note: Wild boreal forest reindeer have not been ...
01 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Vegetation and land cover in the Arctic
The land mass in the Arctic - Greenland and parts of Canada, Alaska, Russia and the Nordic countries - surrounds the Arctic Ocean. In the low Arctic, down to the temperate regions, the taiga coniferous forests represents...
13 Oct 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic, topography and bathymetry
The Arctic is extremely diverse in terms of landscapes, varying from pack and drift ice to rugged shores, flat coastal plains, rolling hills and mountains surpassing 6000 metres above sea level (Denali, 6,194 m asl, in s...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Vegetation zones in the Arctic
The Circumpolar Arctic Vegetation Map (CAVM) project is an international effort to map the vegetation and associated characteristics of the circumpolar region, using a common base map. The base map is a false colour infr...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Human impact on the Arctic environment 2032 (markets first scenario)
Human activities influence the environment and reduce the value of forests, tundra and plains in terms of original biodiversity and habitat. Primarily larger mammals are hit by the fragmentation caused by roads and pipel...
17 May 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Human impact on the Arctic environment 2002
Human activities influence the environment and reduce the value of forests, tundra and plains in terms of original biodiversity and habitat. Primarily larger mammals are hit by the fragmentation caused by roads and pipel...
17 May 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Major global bird migration routes to the Arctic
Bird species that migrate to the Arctic coasts and wetlands arrive from nearly every corner of the planet. During the summer, the sun never or nearly never sets, resulting in a short but intensive breeding season when mi...
17 May 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic protected areas and biomes
Using the Conservation of Arctic Flora and Fauna (CAFF) definition of the Arctic, the majority of the current protected area (pie cheart to the left) is in the Arctic desert biome (45%), followed by the tundra biomes (29...
17 May 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Definitions of the Arctic
Several definitions of the Arctic as a region exist and are all used extensively. Definitions of the geographic boundaries of the Arctic vary, including such definitions as the area with a July isotherm below 10º C, vege...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Arctic, topography and bathymetry
The Arctic is extremely diverse in terms of landscapes, varying from pack and drift ice to rugged shores, flat coastal plains, rolling hills and mountains surpassing 6000 metres above sea level (Denali, 6,194 m asl, in s...
18 Aug 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic, topography and bathymetry
The Arctic is extremely diverse in terms of landscapes, varying from pack and drift ice to rugged shores, flat coastal plains, rolling hills and mountains surpassing 6000 metres above sea level (Denali, 6,194 m asl, in s...
01 Jul 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
Level of river fragmentation and flow regulation
River fragmentation - The interruption of a river’s natural flow by dams, inter-basin transfers or water withdrawal - is an indicator of the degree to which rivers have been modified by man (Ward and Stanford, 1989, and ...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), March 2006
Global flyways of the six subspecies of Red Knot
The Red Knot is a migratory shorebird that travels up to 20,000 km twice a year from its breeding grounds on the high Arctic tundra to its southern non-breeding sites. Along with having one of the longest total migrati...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Lesser White-fronted Goose migratory routes in Eurasiah
The globally threatened Lesser White-fronted Goose is a Palearctic migrant, breeding discontinuously in forest- or shrub tundra and mountainous shrubby wetlands from Fennoscandia to easternmost Russia. The species ha...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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