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Deforestation in Rondonia (Brazil) in the nineties Deforestation in Rondonia (Brazil) in the nineties
The graph shows deforestation in Rondonia, Brazil. Brazil covers more than one quarter of the worlds tropical forests. Since 1980 the deforestation has steadily increased. Deforestration can occur as a result of the clearing of large areas for agricultural purposes, commercial logging and the construction of towns or dams. Please be advised that this graphic is likely outdated.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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The decrease of Arctic sea ice, minimum extent in 1982 and 2007, and climate projections The decrease of Arctic sea ice, minimum extent in 1982 and 2007, and climate projections
Sattelite observations of the september extent of sea ice in the Arctic shows in 2007 shows a 23% decrease from the previous minimum, in 2005, and 39% below the average minimum extent for the time period 1979-2000. The bottom part of this graphic shows the development according to the Arctic Climate Impact Assessment (ACIA) and the merging of five global climate models - the resultant projections shows sucessive decreases for this century. The Ar...
01 Dec 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Total and indigenous populations of the Arctic: Alaska Total and indigenous populations of the Arctic: Alaska
The graphic shows the population between indigenous and non-indigenous people in Alaska. The indigenous peoples include Iñupiaq and Yup'ik Inuit, Alutiq (Aleuts) and Athapaskans. The highest concentrations of these peoples are found on the west-coast.
28 Sep 2005 - by Philippe Rekacewicz, 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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Calorie consumption in selected regions of the world (1975-1995) Calorie consumption in selected regions of the world (1975-1995)
Most of the world has increased in daily calorie intake expcet for Europe and Central Asia. This graph is comparing per-capita calorie consumption in North America, Europe and Central Asia, Africa, and the world average from 1975-1995.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Global energy use 1994 Global energy use 1994
Shows Global energy use 1994
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Global fisheries stock Global fisheries stock
The graphic compares biomass to fish mortality to summarize the amount of exploitation on fish stocks globally. Fish is considered important to human diet, but roughly two-thirds of the world’s major stocks are now fished at or beyond their capacity. Another 6 % is completely depleted.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Sites with dead zones (oxygen depletion on the sea bottom) Sites with dead zones (oxygen depletion on the sea bottom)
Dead zones (hypoxic i.e. oxygen deficient water) in the coastal zones are increasing, typically surrounding major industrial and agricultural centers. This is commonly occuring due to nutrient pollution, in the form of nitrogen and phosphorous leading to algal blooms and eutrophication
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Deep waters within and beyond areas of national jurisdiction in East Africa Deep waters within and beyond areas of national jurisdiction in East Africa
The figure demonstrates that the overwhelming majority of marine areas under national jurisdiction in East Africa are deeper than 200 metres (dark blue). Areas in red indicate where the geology/geomorphology might justify (subject to further research and interpretation) a submission/claim to be made by coastal states individually or jointly to increase their national seabed and subsoil areas, which, in turn, may be of major economic potential.
01 Feb 2008 - by UNEP-WCMC and UNEP/GRID-Arendal
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Estimated contributions to sea-level rise (1993-2003) Estimated contributions to sea-level rise (1993-2003)
The two main reasons for sea-level rise are thermal expansion of ocean waters as they warm, and increase in the ocean mass, principally from land-based sources of ice (glaciers and ice caps, and the ice sheets of Greenland and Antarctica). Global warming from increasing greenhouse gas concentrations is a significant driver of both contributions to sea-level rise. From 1955 to 1995, ocean thermal expansion is estimated to have contributed about 0....
01 Oct 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Cumulative impacts on the marine environment Cumulative impacts on the marine environment
Climate change may, through effects on ocean currents, elevated sea temperatures, coral bleaching, shifts in marine life, ocean acidification and much more severely exacerbate the combined actions of accelerating coastal development, coastal pollution and dead zones, invasive species, bottom trawling and over-harvest. These impacts will be the strongest in 10-15% of the Worlds oceans. These areas, however, are concurrent with the most productive ...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Ratio of wastewater treatment Ratio of wastewater treatment
Sewage treatment is low or absent in many parts of the World, leading to eutrophication of the coastal zone, (toxic) algae blooms and dramatically reduce the ability of coral to recover from bleaching events dramatically. The data reflects the bodies of the UNEP Regional Seas programme.
01 Nov 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Human impact in the coastal zones Human impact in the coastal zones
Infrastructure development, intensive agricultural expansion, urbanisation and coastal development are increasing the flow of sediments and sewage into the ocean. The situation is most severe around Europe, the East coast of the United States, East of China and in Southeast Asia. These are also primary fishing grounds. Coastal zones are identified as approximately 75 km from the coastline, and this map identifies the most common impact class in t...
01 Nov 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Plankton distribution changes, due to climate changes - North Sea Plankton distribution changes, due to climate changes - North Sea
With melting sea ice and warming of the oceans, marine species change their distributions, affecting entire food chains and ocean productivity. In 2005 the subtropical dinoflagellate Ceratium hexacanthum was found in CPR samples from the North Sea at levels that were 6 standard deviations above previous measurements since 1958. Further evidence of this warning signal is seen in the appearance of a Pacific planktonic plant (a diatom Neodenticula s...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Coastal regions with observations of dense shelf water flushing Coastal regions with observations of dense shelf water flushing
Knowledge and mapping of these processes is still scarce due to uneven research effort. The map shows sites with known dense shelf water cascading phenomena, which often may involve the 'flushing' effect. It is most likely that this phenomenon is also active off the coast of Alaska, Chile, Argentina and West and southern Africa and in parts of the Indian Ocean. Dense shelf water cascading is highly sensitive to increases in temperature, and hence...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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World fisheries hotspots, 2004 World fisheries hotspots, 2004
The World’s most productive fishing grounds are confined to major hotspots, less than 10% of the World oceans. The maps shows annual catch (tonnes per km2) for the World’s oceans. Notice the strong geographic concurrence of continental shelves, upwelling and primary productivity and the amount of fish caught by fisheries.
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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depth depth
About depth
29 Nov 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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scenario scenario
About scenario
29 Nov 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Distribution of coldwater and tropical coral reefs Distribution of coldwater and tropical coral reefs
Coral reefs are marine ridges or mounds, which have formed over millennia as a result of the deposition of calcium carbonate by living organisms, predominantly corals, but also a rich diversity of other organisms such as coralline algae and shellfish. The coldwater reefs are highly susceptible to deep-sea trawling and ocean acidification from climate change, which has its greatest impacts at high latitudes, while tropical reefs will become severe...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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canyondsw canyondsw
About canyondsw
29 Nov 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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