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Locations reported by various studies as undergoing high rates of land cover change in the past few decades Locations reported by various studies as undergoing high rates of land cover change in the past few decades
In the case of forest cover change, the studies refer to the period 1980–2000 and are based on national statistics, remote sensing, and to a limited degree expert opinion. In the case of land cover change resulting from degradation in drylands (desertification), the period is unspecified but inferred to be within the last half-century, and the major study was entirely based on expert opinion, with associated low certainty.
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
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Climate change vulnerability in Africa Climate change vulnerability in Africa
Multiple stresses make most of Africa highly vulnerable to environmental changes, and climate change is likely to increase this vulnerability. This graphic shows which of the regions of Africa (North Africa, West Africa, Central Africa, East Africa, Southern Africa and the Western Indian Ocean Islands) are most vulnerable to specific impacts of climate change. These impacts include desertification, sea level rise, reduced freshwater availability,...
17 May 2005 - by Delphine Digout, UNEP/GRID-Arendal
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Worst Case Scenario for the Amazon Forest Worst Case Scenario for the Amazon Forest
2050. Global climate change has already contributed to rising temperatures in the Amazon which, when combined with deforestation, have led to a cycle of lower precipitation and a greater frequency of droughts. Researchers at Brazil’s National Institute for Space Research say that the Amazon could reach a tipping point – the point at which deforestation and climate change combine to trigger self-sustaining desertification – in 50-60 yea...
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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Global soil degradation Global soil degradation
Overview of the state of global soil degradation in the world. The loss of arable land has been caused by a number of factors, many or most of which are tied to human development. The primary causes are deforestation, overexploitation for fuelwood, overgrazing, agricultural activities and industrialization.
06 Nov 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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The inlet of the bay of Kara-Bogaz-Gol before and after the construction of the dam (Turkmenistan, Caspian Sea) The inlet of the bay of Kara-Bogaz-Gol before and after the construction of the dam (Turkmenistan, Caspian Sea)
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. In Soviet times it was decided to set up a dam to block the flow of saline water from the bay to the Caspian Sea, and this was completed in 1980. The ensuing increase in the salt content of the southern part of the Caspian had biological consequences. In the spring of 1992, in view of the scale of the disaster, Turkmenistan, which...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Desertification in the Caspian Sea region Desertification in the Caspian Sea region
Contrasting rainfall trends have been observed in the north and south. Whereas rainfall over Russia has increased over the last century, already dry areas such as the coasts of Turkmenistan and Iran have become even drier. Dust storms pick up large amounts of salt and dust as they pass over the Kara-Kum desert and the Caspian Sea shore, depositing it in the Volga valley where it impairs the fertility of arable land.
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Kara-Bogaz-Gol - restoration of previous water levels after 1992 (Turkmenistan, Caspian Sea) Kara-Bogaz-Gol - restoration of previous water levels after 1992 (Turkmenistan, Caspian Sea)
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. In Soviet times it was decided to set up a dam to block the flow of saline water from the bay to the Caspian Sea, and this was completed in 1980. The ensuing increase in the salt content of the southern part of the Caspian Sea, to levels exceeding 15 grams per litre, had disastrous consequences for the sturgeon population. In the ...
29 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Selected impacts of climate change in the Caspian Sea region 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 fears that the warm Gulf Stream current in the Atlantic Ocean may slow down due to the changes in the Artic environment and oceanic circulation.
01 Oct 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Water flow from the Caspian Sea to the bay of Kara-Bogaz-Gol, 1930-2000 Water flow from the Caspian Sea to the bay of Kara-Bogaz-Gol, 1930-2000
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. Soviet leaders maintained that this was “a useless caldron for evaporation, an insatiable mouth swallowing up the precious water of the Caspian Sea” and obviously to blame. The dam, finished in 1980 blocked the flow of the water between the Caspian Sea and Kara-Bogaz-Gol. This reduced the water levels in the bay while increasing d...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Kara-Bogaz-Gol, desertification while dammed 1980-1992 (Caspian Sea, Turkmenistan) Kara-Bogaz-Gol, desertification while dammed 1980-1992 (Caspian Sea, Turkmenistan)
Kara-Bogaz-Gol is a lowland area that forms a highly saline bay on the east side of the Caspian Sea, in Turkmenistan. In Soviet times it was decided to set up a dam to block the flow of saline water from the bay to the Caspian Sea, and this was completed in 1980. Much to everyone’s surprise the Kara-Bogaz-Gol bay dried up 10 times faster than had been forecast by the Institute of Hydraulic Affairs and by autumn 1983 it was all over. The pink flam...
07 Nov 2007 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Climate change vulnerability in Africa Climate change vulnerability in Africa
Multiple stresses make most of Africa highly vulnerable to environmental changes, and climate change is likely to increase this vulnerability. This graphic shows which of the regions of Africa (North Africa, West Africa, Central Africa, East Africa, Southern Africa and the Western Indian Ocean Islands) are most vulnerable to specific impacts of climate change. These impacts include desertification, sea level rise, reduced freshwater availability,...
17 May 2005 - by Delphine Digout, Revised by Hugo Ahlenius, UNEP/GRID-Arendal
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Climate change vulnerability in Africa Climate change vulnerability in Africa
Multiple stresses make most of Africa highly vulnerable to environmental changes, and climate change is likely to increase this vulnerability. This graphic shows which of the regions of Africa (North Africa, West Africa, Central Africa, East Africa, Southern Africa and the Western Indian Ocean Islands) are most vulnerable to specific impacts of climate change. These impacts include desertification, sea level rise, reduced freshwater availability,...
20 Sep 2005 - by Delphine Digout, Revised by Hugo Ahlenius, UNEP/GRID-Arendal
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Environment in Central Asia [Russian] Environment in Central Asia [Russian]
There are 25 billion tonnes of waste just from mining and metal production in Central Asia. The most effected areas are highlighted based on a variety of different types of environmental damage such as desertification and wind erosion. In Russian.
14 Feb 2006 - by I. Atamuradova, V. Yemelin, P. Rekacewicz, UNEP/GRID-Arendal
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Environment in Central Asia Environment in Central Asia
There are 25 billion tonnes of waste just from mining and metal production in Central Asia. The most effected areas are highlighted based on a variety of different types of environmental damage such as desertification and wind erosion.
14 Feb 2006 - by I. Atamuradova, V. Yemelin, P. Rekacewicz, UNEP/GRID-Arendal
3
Locations reported by various studies as undergoing high rates of land cover change in the past few decades Locations reported by various studies as undergoing high rates of land cover change in the past few decades
In the case of forest cover change, the studies refer to the period 1980–2000 and are based on national statistics, remote sensing, and, to a limited degree, expert opinion. In the case of land cover change resulting from degradation in drylands (desertification), the period is unspecified but inferred to be within the last half-century, and the major study was entirely based on expert opinion, with associated low certainty. Change in cultivated ...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
4
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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Official Development Assistance Official Development Assistance
In addition to funds specifically for CDM projects, another source of funds for developing countries facing climate change are those designated as Official Development Assistance (ODA). Between 2000 and 2007, the region of Latin America and the Caribbean received 8.5% of these funds. One category of these resources is directed at providing development assistance that targets the objectives of the three Rio Conventions: the United Nations Conventi...
22 Nov 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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The greening of Niger - trends in vegetation The greening of Niger - trends in vegetation
The Sahel region of Africa, a belt of savanna ecoregion south of the Sahara desert, stretched from coast to coast. This region is not only known for long spells of drought (and desertification), but also from housing some of the World's poorest countries. Recent trends show good signs on the recovery of the region, and the relative vegetation index (NDVI) presented for the country of Niger in this map shows increases in the period from 1982 to 19...
07 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Desertification Desertification
Environment and Security in the Mediterranean: Desertification
17 Nov 2009 - by Emmanuelle Bournay and Matthias Beilstein, Zoï Environment Network
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