Tag: Air

Climate feedbacks - the connectivity of the positive ice/snow albedo feedback, terrestrial snow and vegetation feedbacks and the negative cloud/radiation feedback
Feedback refers to the modification of a process by changes resulting from the process itself. Positive feedbacks accelerate the process, while negative feedbacks slow it down. Part of the uncertainty around future clima...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
Le «trou » : résultat de conditions météo particulières au-dessus du pôle, répétées chaque printemps
« Le continent antarctique est entouré de forts vents dans la stratosphère qui soufflent autour de l’Antarctique et isolent l’air qui se trouvent au-dessus de l’Antarctique de l’air qui se trouve aux latitudes moyennes. ...
26 May 2010 - by UNEP/GRID-Arendal
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
CO2 air emissions by sources in 1995
The graph shows CO2 air emissions from selected countries by various sources in 1995. Among the anthropogenic sources of CO2 air emissions are fossil fuel combustion, cement production and land-use conversion.
13 Feb 2006 - by Emmanuelle Bournay, Philippe Rekacewicz, UNEP/GRID-Arendal
Transport routes of POP and concerned areas
Persistent organic pollutants (POPs) mainly Polychlorinated Biphenyls (PCB) and hexachlorocyclohexane (HCH), are brought into the Barents region and the whole of the Arctic region from many different locations.
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Dominating air currents
The pollution from industrialized nations are affecting the environment in the Arctic region. The main areas of indutrial activity in the northern hemisphere are spreading to specific areas in the Arctic though air curre...
04 Oct 2005 - by UNEP/GRID-Arendal
SO2 air concentration
Sulfur dioxide (SO2) is a colourless gas with a sharp,irritating odour. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores that contain sulfur. There are several areas in the ...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Forest damage due to air pollution
Air pollution has had an enormous impact of the forest in the Barents region. SPecifically there is alot of damage in Russia near the borders of Norway and Finland. The diagram shows areas of 'forest death' and the subse...
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Cooling factors
The amount of aerosols in the air has direct effect on the amount of solar radiation hitting the Earth's surface. Aerosols may have significant local or regional impact on temperature. Water vapour is a greenhouse gas, b...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Mining effects on rainfall drainage
The Acid Mine Drainage (AMD) is the number one environmental problem facing the mining industry. AMD occurs when sulphide-bearing minerals in rock are exposed to air and water, changing the sulphide to sulphuric acid. I...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Long range transport of air pollutants to the Arctic
The major industrial areas of the Northern Hemisphere are a source for long range transport of pollutants. The main air currents are taking industrial air pollution and circulating them with the end result being an incre...
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
The Antarctic convergence
The Antarctic convergence represents an important climatic boundary between air and water masses, and is also an approximate boundary for the Southern Ocean, surrounding the Antarctic continent. The water around the land...
28 Sep 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Varying contribution to climate change
Share of transport-related greenhouse gas emissions generated by rail, sea, air and road.
04 Jun 2008 - by Emmanuelle Bournay, UNEP/GRID-Arendal
The boom in air travel
Number of air transport passengers per year in millions depicted as USA relative other countries.
04 Jun 2008 - by Emmanuelle Bournay, UNEP/GRID-Arendal
Other options besides flight?
Most commonly used air routes, in million passengers a year. Displayed as flights most easily replace by train and flights possibly replaceable by train and ship.
04 Jun 2008 - by Emmanuelle Bournay, UNEP/GRID-Arendal
Emissions of HFC in CO2 equivalents in Norway, 85-96
The graphic shows Emissions of HFC in CO2 equivalents in Norway from 1985 to 1996 with projections to 2010. HFCs are among the most important greenhouse gases and are covered under the Kyoto protocol. Hydrofluorocarbons...
12 Feb 2006 - by UNEP/GRID-Arendal
Norwegian emissions of N2O
Emissions of N20 have a role in the enhanced greenhouse effect. N20 is a long-lived gas, surviving in the atmosphere for about 130 years. The concentration of N20 in the atmosphere is increasing due to a variety of sourc...
12 Feb 2006 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Trends in global temperatures
The figure shows the combined land-surface air and sea surface temperatures (degrees Centigrade) 1861 to 1998, relative to the average temperature between 1961 and 1990. The mean global surface temperature has increased...
06 Nov 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Cooling factors
The amount of aerosols in the air has direct effect on the amount of solar radiation hitting the Earth's surface. Aerosols may have significant local or regional impact on temperature. Water vapour is a greenhouse gas, b...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Trends in regional average surface temperature in the Ferghana Valley area
An important factor when looking at the region in terms of environment and security is the impact of climate change in Central Asia in general, and Ferghana Valley in particular. By modifying people’s livelihood, climate...
16 Mar 2006 - by Viktor Novikov, UNEP/GRID-Arendal
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