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Tag: Geology

Historical trends in carbon dioxide concentrations and temperature, on a geological and recent time scale
The most recent geological history, in the last hundred thousand years, has been characterised by cycles of glaciations, or ice ages. The historic temperatures, through these times, have been low, and continental ice she...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Different sources of danger and their impacts to the environment
Contaminated groundwater can adversely affect animals, plants and humans if it is removed from the ground by manmade or natural processes. Depending on the geology of the area, groundwater may rise to the surface through...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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 justif...
01 Feb 2008 - by UNEP-WCMC and UNEP/GRID-Arendal
Alkalinity in major rivers
This graphic shows the average bicarbonate concentrations, in milligrams per litre, at major river mouths for the time periods 1976 to 1990 and 1991 to 2000. The graphic also shows the changes in average bicarbonate leve...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Historical trends in carbon dioxide concentrations and temperature
The more recent history, from the middle ages and up until now, show increasing temperatures, rising as the world emerged from the Little Ice Age (LIA), around 1850. With the industrial era, human activities have at the ...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Role of geology in Article 76
No data
03 Feb 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal