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Temperature trends and projections 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 from tree ring records, used to reconstruct temperatures over this period, suggests that the 1990s was the warmest period in a millennium. It is very likely that nearly all land areas will warm more rapidly than the global average, ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Annual deforestation in the Amazon and resulting CO2 emissions 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, particularly in Brazil and Peru, which comprise 92% of the total forest cover. These countries are among the 10 that hold two-thirds of the world’s forests and jungles. Because of its size, the greatest extent of deforestation is in B...
17 May 2005 - by UNEP/GRID-Arendal
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Forest composition case study in North America 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 many areas. Some tree species will probably be replaced altogether, jeopardizing biological diversity in several places.
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Number of Tree Species per Country in the World 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 30 per cent. The rate of species loss in forest regions is considerably faster than in other ecosystems. Between now and 2050, it is projected that there will be a further 38 per cent loss in abundance of forest species (UN...
20 Jun 2009 - by Philippe Rekacewicz assisted by Cecile Marin, Agnes Stienne, Guilio Frigieri, Riccardo Pravettoni, Laura Margueritte and Marion Lecoquierre.
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Area of Biomes Protected 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 move further polewards. In temperate regions, plant and tree species can migrate naturally by 25 to 40 kilometres a century. However if, for example, there was a 3°C increase in temperature over a hundred year period in a partic...
20 Jun 2009 - by Philippe Rekacewicz assisted by Cecile Marin, Agnes Stienne, Guilio Frigieri, Riccardo Pravettoni, Laura Margueritte and Marion Lecoquierre.
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Billion Tree Campaign Billion Tree Campaign
01 Nov 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Number of trees planted, world map - UNEP Billion Tree Campaign, May 2008 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 since the launch of the initiative, the campaign has managed to catalyze the planting of two billion trees, double its original target. The campaign, spearheaded by the UN Environment Programme (UNEP) and the World Agroforestry Ce...
28 Sep 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Paper lifecycle comparison 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-products.
15 Dec 2006 - by Emmanuelle Bournay
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Tree line in the Arctic 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 Programme (AMAP), is limited by the orange line on the graphic.
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Tree line in the Arctic 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 Programme (AMAP), is limited by the orange line on the graphic.
07 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Temperatures over previous centuries from various proxy records 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 the Little Ice Age. While overall temperatures during the Little Ice Age were cooler than now, there was much year-to-year variability and some warm periods. The coldest part of the Little Ice Age, from 1645 to 1715, was also a t...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Natural resources for pro-poor economic growth 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 other similar activities and making it easier to run a businesses out of these, economic growth can be gained. This illustration symbolizes this in the form of a tree, with different natural resources as leaves and the trunk being ma...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Reforestation, town of Galma and surroundings, Niger 1975 and 2003 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 1980s in the most densely populated parts of Niger farmers have begun to protect and manage young trees and bushes regenerating on their cultivated fields. This is natural farmer-managed forest regeneration. Some trees fix nitrogen...
01 Oct 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Temperature increases in the Antarctic due to climate change, 2090 (NCAR-CCM3, SRES A2 experiment) 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 started moving more rapidly, but the analyses of the Antarctic ice sheet are inconclusive. The projected climate situation in 2090 are presented in this figure, the temperatures are annual values from the NCAR-CCM3 model, ensembl...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Projected temperature increases in the Arctic due to climate change, 2090 (NCAR-CCM3, SRES A2 experiment) 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 the glaciers and ice sheets are shrinking. The projected climate situation in 2090 are presented in this figure, the temperatures are annual values from the NCAR-CCM3 model, ensemble averages 1-5 for the SRES A2 experiment. The ice ...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Distribution of lodgepole pine in Sweden 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 loose crown reaching up to 80 feet tall.
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Distribution of lodgepole pine in Sweden 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 loose crown reaching up to 80 feet tall.
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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