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Tag: Deposition

Estimated ground deposition of cesium-137 from nuclear-weapon fallout
The graph shows the estimated ground deposition of cesium-137 from nuclear weapon testing fallout. Cesium- 173 deposition from nuclear- weapon fallout have severe effects on human health. Based on estimaed doses to the A...
13 Feb 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Ground deposition of 137Cs after the Chernobyl accident
The Chernobyl nuclear accident was a devasting catastrophe with effects measurable over a huge distance. This map shows areas that have elevated levels of cesium 137 in Nordic area, in the years after the Chernobyl accid...
13 Feb 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Ore production and waste generation at Ok Tedi Mine
The Ok Tedi mine is located high in the rain forest covered Star Mountains of Papua New Guinea. Prior to 1981 the local Wopkaimin people lived a subsistence existence in one of the most isolated places on earth. That was...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
How long does it take for some commonly used products to biodegrade?
Pollution emitted in industrial areas represents a threat to human health and the surrounding natural resources. We have a tendency to believe that the production processes are the only source of environmental damage, an...
17 May 2005 - by UNEP/GRID-Arendal
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...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Estimated total reactive nitrogen deposition from the atmosphere (wet and dry) in 1860, early 1990s, and projected for 2050
Atmospheric deposition currently accounts for roughly 12% of the reactive nitrogen entering terrestrial and coastal marine ecosystems globally, although in some regions, atmospheric deposition accounts for a higher perce...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Coldwater coral reefs, distribution
Scientists are just beginning to learn about the many species in the remote, deep waters of the polar oceans. Corals, for example, are not limited to the warm, shallow waters of the tropics. They also exist in many cold,...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Coldwater coral reefs, distribution
Scientists are just beginning to learn about the many species in the remote, deep waters of the polar oceans. Corals, for example, are not limited to the warm, shallow waters of the tropics. They also exist in many cold,...
21 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
PCDD (dioxin) in the atmosphere and deposition, 2003
No data.
28 Mar 2006 - by Bounford.com and UNEP/GRID-Arendal
Coral reefs at risks
There are two distinct regions in which coral reefs are primarily distributed: the Wider Caribbean (Atlantic Ocean) and the Indo-Pacific (from East Africa and the Red Sea to the Central Pacific Ocean). - The diversity o...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006