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Arctic Soil Organic Carbon Content Arctic Soil Organic Carbon Content
A new assessment has estimated that there are 1,650 gigatonnes of carbon stored in the northern circumpolar permafrost region4, more than twice the amount of carbon in the atmosphere.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Arctic Ocean surface Temperatures Arctic Ocean surface Temperatures
Consistent with the rapid retreat of sea ice, the surface waters of the Arctic Ocean have been warming in recent years, because declining sea-ice cover allows the water to absorb more heat from the sun.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Uptake of Carbon Dioxide from the Atmosphere Uptake of Carbon Dioxide from the Atmosphere
Atmosphere-ocean exchanges of carbon.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Modeled strength of the atlantic Meridional Overturning Circulation at 30° North Modeled strength of the atlantic Meridional Overturning Circulation at 30° North
MOC strength in a suite of coupled climate models.
27 Oct 2009 - by Laura Margueritte
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Average sea level 1900-2009 Average sea level 1900-2009
Sea-level rise is accelerating.
27 Oct 2009 - by Laura Margueritte
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Concentration Extent Concentration Extent
Reduced sea ice amplifies warming.
27 Oct 2009 - by Laura Margueritte
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Surface Temperature Surface Temperature
At the regional, ocean basin scale, the area between the insulating sea-ice cover and the open ocean (known as the ice margin) is characterized by particularly strong temperature gradients during winter, favoring the development of low pressure systems along the edge of the ice, as well as smaller, intense features known as polar lows that present hazards to shipping.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Regional Distribution of Sea-level Trends 1950-2003 Regional Distribution of Sea-level Trends 1950-2003
Satellite altimetry data has revealed that sea level is not rising uniformly.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Wastewater, a global problem with differing regional issues Wastewater, a global problem with differing regional issues
The significance of wastewater and contents of wastewater vary greatly between and even within regions. In Africa for example, it is the impact on people’s health that is the major factor, in Europe, the input of nutrients into the coastal waters reducing productivity and creating anoxic dead zones.
01 Mar 2010 - by UNEP/GRID-Arendal
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Wastewater - Contaminants and their effects Wastewater - Contaminants and their effects
The contaminants in waste- water come from many different sources and can have cumulative and synergistic effects requiring a multi-pronged response.
01 Mar 2010 - by UNEP/GRID-Arendal
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Water withdrawal and use Water withdrawal and use
Regional variation in water withdrawal per capita and its use by sector.
01 Mar 2010 - by UNEP/GRID-Arendal
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Water desalination Water desalination
Desalination is an increasingly important practice to secure clean water in a number of countries. Monitoring is key to minimize negative impacts on the ecosystem.
01 Mar 2010 - by UNEP/GRID-Arendal
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A look inside - Concentrations of micro-organisms excreted in one litre of wastewater A look inside - Concentrations of micro-organisms excreted in one litre of wastewater
What one litre of wastewater might contain in terms of pathogens.
01 Mar 2010 - by UNEP/GRID-Arendal
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World population living in river basins with severe water stress World population living in river basins with severe water stress
Increasing water scarcity with population increase.
01 Mar 2010 - by Giulio Frigieri
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Population living in river basins where freshwater withdrawal exceeds 40 per cent of renewable resources Population living in river basins where freshwater withdrawal exceeds 40 per cent of renewable resources
Population by region was calculated averaging the results forecasted by the scenarios of the GEO-4 report using the WaterGAP modeling.
01 Mar 2010 - by Giulio Frigieri
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Wastewater in urban agriculture - Resource or threat? Wastewater in urban agriculture - Resource or threat?
Is reuse of wastewater a benefit or a threat for agri- culture?
01 Mar 2010 - by UNEP/GRID-Arendal
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Sanitation sewage and treatment in big cities - Two study cases Sanitation sewage and treatment in big cities - Two study cases
Case study to compare two urban centres.
01 Mar 2010 - by UNEP/GRID-Arendal
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Access to sanitation facilities Access to sanitation facilities
Access to improved sanitation remains a pressing issue in many regions.
01 Mar 2010 - by UNEP/GRID-Arendal
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Freshwater and wastewater cycle - Water withdrawal and pollutant discharge Freshwater and wastewater cycle - Water withdrawal and pollutant discharge
As water is extracted and used along the supply chain, both the quality and quantity of water is reduced.
01 Mar 2010 - by UNEP/GRID-Arendal
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Distribution of causes of death among children under five years and within neonatal period Distribution of causes of death among children under five years and within neonatal period
Distribution of causes of death among children un- der five years and within the neonatal period, 2004 (Figure from WHO, 2008).
01 Mar 2010 - by UNEP/GRID-Arendal
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