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Glacier Mass Balance Glacier Mass Balance
Glacier mass loss has been observed across the Arctic, consistent with the global trend.
27 Oct 2009 - by Laura Margueritte
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Trends in permafrost temperatures in the central and northern Mackenzie Valley, 1984-2006 Trends in permafrost temperatures in the central and northern Mackenzie Valley, 1984-2006
Temperature monitoring in Canada indicates a warming of shallow permafrost over the last two to three decades. Since the mid-1980s, shallow permafrost (upper 20-30 m) has generally warmed in the Mackenzie Valley. The greatest increases in temperature were 0.3 to 1°C per decade in the cold and thick permafrost of the central and northern valley. In the southern Mackenzie Valley, where permafrost is thin and close to 0°C, no significant trend in pe...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Environmental policy responses Environmental policy responses
This graphic shows the general responses to the need for policy from region to region around the world. The trend looks optimistic that many different types and level of policies are being implemented in most areas of the world. Please note that this graphic is outdated.
01 Jan 1998 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Urban population: status and trends Urban population: status and trends
Since the dawn of civilization, people have been aggregating in towns and cities. This trend has reached an even higher rate with the dawn of industrialisation, and especially in developing countries, as seen in the graphic. From 1975 to 2015 the number of people in urban areas is projected to more than double.
20 Sep 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Rapid decline of the San Quintin glacier, North Patagonia Rapid decline of the San Quintin glacier, North Patagonia
Glaciers grow and retreat at intervals depending on local climate changes, particularly variations in temperature and precipitation . Retreating and diminishing mountain glaciers all over the world, except in the Antarctica, indicate a general trend of global warming.
17 May 2005 - by UNEP/GRID-Arendal
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Precipitation changes: trend over land from 1900 to 1994 Precipitation changes: trend over land from 1900 to 1994
Precipitation has increased over land at high latitudes of the Northern Hemisphere, especially during the cold season. Decrease in precipitation occurred in steps after the 1960s over the subtropics and the tropics from Africa to Indonesia.
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Trends in Area of Productive Forest Plantations Trends in Area of Productive Forest Plantations
In 2005, 2.8 per cent of total global forest cover was made up of productive forest plantations, amounting to an area of approximately 110 million hectares (FAO 2006a). According to the FAO, there was an increase of approximately 40 per cent in the area of the world’s forests plantations with productive functions in the 15 years from 1990. Studies indicate that this growth – a marked trend in recent years – is set to continue (e.g., MA...
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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Changing percentages of selected municipal wastes Changing percentages of selected municipal wastes
Municipal waste is everything collected and treated by municipalities. Only part of it is comes from households, the rest is generated by small businesses, commercial and other municipal activities. A typical trend: as countries get richer, the organic share decreases whereas the paper and plastic ones increase.
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Piscivore-zooplanktivore Index Piscivore-zooplanktivore Index
Shows the Piscivore-zooplanktivore ratio between the years 1950-1995, in the Northeast Atlantic Ocean, and their relationship in the trophic composition of the ecosystem, which shows an ondulating trend, which has decreased in the time period.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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CO2 emissions from coal, gas and oil for selected regions CO2 emissions from coal, gas and oil for selected regions
Graph showing the amount (in millions of metric tonnes) of CO2 emissions from coal, gas and oil. Covers the years from 1990-2000 and predicts the trend to 2020. Information on the United States, Western Europe, Eastern Europe and the former Soviet Union and Africa is included.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Trends in energy consumption Trends in energy consumption
The graphic shows the total world energy consumption from 1970 to 2001, with projections to 2020. It shows the trend of increasing energy use since 1970, continuing until 2020. Over the last decade developed countries have attempted to reduce the over-all energy demand.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Harmful algal blooms in the West Central Atlantic, 1970-96 Harmful algal blooms in the West Central Atlantic, 1970-96
The graphic shows the trend of the number of harmful algal blooms in the Western Atlantic from 1970 to 1996. The excess growth of algae is often caused by pollution, and can have negative or fatal effects on some species of fish.
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Global capture fisheries and aquaculture production, 1950-1999 Global capture fisheries and aquaculture production, 1950-1999
The global fisheries catch has levelled off, reflecting a growing decline in most major fishing areas. This graphic shows the amount of global aquaculture production and of global capture fishery catches in millions of tonnes per year for 1950 to 1999. The graphic also shows the amounts of global aquaculture production in marine water, freshwater and brackish water, in millions of tonnes, for 1998.
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Trends in wind energy generating capacity Trends in wind energy generating capacity
Net annual addition to global wind energy generating capacity, general trend 1980-1995, in megawatts. Wind power represents a possible energy source to replace fossil fuels, like oil and coal, as well as non-renewable energy sources, such as nuclear power.
14 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Consumer items in China Consumer items in China
The impact of income on lifestyle is apparent in China like elsewhere. There has been a massive surge in all consumer goods with rising income in towns. The same trend can be observed to a much lesser extent in the country.
15 Dec 2006 - by Emmanuelle Bournay
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Global costs of extreme weather events Global costs of extreme weather events
The loss data on great natural disasters in the last decades show a dramatic increase in catastrophe losses. A decade comparison since 1960 is shown in the table. The reasons for this development are manifold and encompass the increase in world population and the simultaneous concentration of people and values in large conurbations, the development of highly exposed regions and the high vulnerability of modern societies and technologies, and fina...
17 May 2005 - by Emmanuelle Bournay, UNEP/GRID-Arendal
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Global costs of extreme weather events Global costs of extreme weather events
The loss data on great natural disasters in the last decades show a dramatic increase in catastrophe losses. A decade comparison since 1960 is shown in the table. The reasons for this development are manifold and encompass the increase in world population and the simultaneous concentration of people and values in large conurbations, the development of highly exposed regions and the high vulnerability of modern societies and technologies, and fina...
01 Feb 2006 - by Emmanuelle Bournay, UNEP/GRID-Arendal
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Mass balance of Maliy Aktru Glacier, Russian Altai Mass balance of Maliy Aktru Glacier, Russian Altai
Measurements on this valley-type glacier in the North Chuyskiy Range show a slightly negative annual mass balance trend culminating in an ice loss of about 4 m water equivalent over the period 1964–2005.
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Northern Hemisphere snow-cover extent anomalies 1966-2005 Northern Hemisphere snow-cover extent anomalies 1966-2005
Data from satellite monitoring from 1966 to 2005 show that mean monthly snow-cover extent in the Northern Hemisphere is decreasing at a rate of 1.3 per cent per decade. For the calendar year of 2006 average snow-cover extent was 24.9 million km2, which is 0.6 million km2 less than the 37-year average. In the Northern Hemisphere, spring and summer show the strongest decreases in snow-cover extent. Satellite observations of snow-cover extent show a...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Glacier front variations in the European Alps Glacier front variations in the European Alps
Large Alpine glaciers have retreated continuously since the mid- 19th century, whereas steep mid-sized glaciers reacted with readvances in the 1890s, 1920s and between the 1970s and 1980s due to the somewhat cooler and wetter periods. Small glaciers feature a high annual variability with a clear shrinking trend.
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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