Tag: Tree

Temperature trends and projections
The global average surface temperature has increased over the 20th century by about 0.6 degrees Celsius. This increase in temperature is likely to have been the largest for any century in the last 1000 years. Evidence fr...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Annual deforestation in the Amazon and resulting CO2 emissions
According to the World Resources Institute,Brazil had the highest carbon dioxide equivalent emissions in the region in 2001, primarily due to changes in land use.) Most of the region’s forests are in South America, parti...
17 May 2005 - by UNEP/GRID-Arendal
Forest composition case study in North America
Current and projected Ranges of Beech Trees in the US. A warmer climate may have significant effect on the forests. Decidous forests will probably move northwards and to higher altitudes, replacing coniferous forests in...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Number of Tree Species per Country in the World
The Convention on Biological Diversity (CBD) estimates that the accelerating rate of deforestation which has taken place over the last century has contributed to reducing the abundance of forest species by more than...
20 Jun 2009 - by Philippe Rekacewicz assisted by Cecile Marin, Agnes Stienne, Guilio Frigieri, Riccardo Pravettoni, Laura Margueritte and Marion Lecoquierre.
Area of Biomes Protected
Rising temperatures force many living organisms to migrate to cooler areas, while new organisms arrive. Such movements involve all species, including plants. Some species will seek higher altitudes, others will mov...
20 Jun 2009 - by Philippe Rekacewicz assisted by Cecile Marin, Agnes Stienne, Guilio Frigieri, Riccardo Pravettoni, Laura Margueritte and Marion Lecoquierre.
Billion Tree Campaign
01 Nov 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Number of trees planted, world map - UNEP Billion Tree Campaign, May 2008
The UNEP Billion Tree Campaign represents a unique worldwide tree planting initiative, aimed at empowering citizens to corporations and people up to presidents to embrace the climate change challenge. By 2008, 18 months ...
28 Sep 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Paper lifecycle comparison
Statistics from the Paper Task Force show virgin paper (from tree harvesting to the landfill) versus and recycled paper (from collection to recycling again) and their respective environmental impacts by various by-produc...
15 Dec 2006 - by Emmanuelle Bournay
Tree line in the Arctic
This graphic shows the location of the arctic tree line. Boreal forest occurs only to the south of the tree line (the dark green line on the graphic). The Arctic area, as defined by the Arctic Monitoring and Assessment P...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Tree line in the Arctic
This graphic shows the location of the arctic tree line. Boreal forest occurs only to the south of the tree line (the dark green line on the graphic). The Arctic area, as defined by the Arctic Monitoring and Assessment P...
07 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Temperatures over previous centuries from various proxy records
Evidence from tree rings and other temperature proxies suggests that during the previous 500 years global temperatures were 1.0ºC cooler than those of the 20th century during a period roughly from 1300 to 1870 – known as...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Natural resources for pro-poor economic growth
To alleviate rural poverty, one way is to sustainably use the natural resources available to the people and the communities. By supporting and expanding fisheries, small-scale mining, forestry, ecosystem services and oth...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Reforestation, town of Galma and surroundings, Niger 1975 and 2003
In 1970s and 1980s - years of environmental crisis, there were few trees remaining in Niger. Wind-blown sands razed farmers' young crops and they often had to plant crops three times to succeed. Since the middle of the 1...
01 Oct 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Temperature increases in the Antarctic due to climate change, 2090 (NCAR-CCM3, SRES A2 experiment)
Climate change, due to increased concentrations of greenhouse gases in the atmosphere, has not lead as clear changes in the Antarctic as in the Arctic. Some of the ice shelves of the Antarctic peninsula have split up and...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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
Distribution of lodgepole pine in Sweden
Forest distribution in Scandinavia is affected by several different species. This is to demonstrate the concentration of lodgepole pine (pinus contorta) in Sweden. The lodgepole pine is a tall, slender tree with a narrow...
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Distribution of lodgepole pine in Sweden
Forest distribution in Scandinavia is affected by several different species. This is to demonstrate the concentration of lodgepole pine (pinus contorta) in Sweden. The lodgepole pine is a tall, slender tree with a narrow...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal