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Tag: Environmental change

The health of our forests
The importance of the world's forests to global efforts to reduce carbon emissions cannot be underestimated. While living forests are vital to reducing carbon levels in our atmosphere, deforestation accounts for an estim...
27 Sep 2012 - by GRID-Arendal
Selected impacts of climate change in the Caspian Sea region
As the concentration of greenhouse gases in the atmosphere increases, the temperature in the European part of the Caspian Sea region will continue to rise, at least at first. Some researchers have recently expressed fear...
01 Oct 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Shift in climatic zones, Arctic scenario
The scenarios from the Arctic Climate Impact Assessment (ACIA) project that temperatures will increase dramatically in the Arctic, more than in many other parts of the world. This leads to effects, such as the decrease o...
01 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arctic development scenarios, human impact in 2050
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...
01 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
Permafrost loss in peatlands of northern Quebec, 1957-2003
Over recent years, the southern limit of permafrost in northern peatlands has retreated by 39 km on average and by as much as 200 km in some parts of the Canadian Arctic. Although regional warming by 1.32°C has accelerat...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Trends in lakes in the Arctic
The Arctic contains a variety of types of lakes but overall, it is thermokarst lakes and ponds that are the most abundant and productive aquatic ecosystems in the Arctic. They are found extensively in the lowland regions...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Consumption of harvested meat/fish in Inuit Households (Canada)
The harvest of natural resources is a key feature of traditional lifestyles and economies throughout the Arctic, and a continuing reliance on it as a mainstay of indigenous existence in the north is evident. Environmenta...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
Invasive species response to climate change - Hydrilla spp, current and 2080 habitat suitability
As climate change alters Arctic ecosystems and enables greater human activity, biological invasions are likely to increase in the Arctic. To some extent, Arctic terrestrial ecosystems may be predisposed to invasion becau...
01 Nov 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
Human actions leading to coastal degradation
Physical alteration and the destruction of habitats are now considered one of the most significant threats to coastal areas. Half of the world’s wetlands, and even more of its mangrove forests, have been lost over the pa...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
Coastal populations and shoreline degradation
Unsurprisingly, the coastal areas with the greatest population densities are also those with the most shoreline degradation. The areas surrounding the Black Sea, the Mediterranean and southern Asia have the highest prop...
01 Oct 2009 - by Phillippe Rekacewicz, February 2006
Global sea-level rise
According to the 2007 IPCC report, global average sea level rise will vary from 18 cm to 59 cm by 2100. The IPCC models did not account for the accelerated melting of ice sheets in Greenland and Antarctica. Some of th...
01 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal