Geographic Information System GISA system comprised of computer software and geographic data that enables analysis of those data and generation of maps.
Global Warming (GW)An increase in the temperature of the Earth's troposphere. Global warming has occurred in the past as a result of natural influences, but the term is most often used to refer to the warming predicted by computer models to occur as a result of increased emissions of greenhouse gases.
Global Warming Potential (GWP)The relative warming of a greenhouse gas over a specified period of time as compared to carbon dioxide (GWP of 1). GWP allows for the conversion of different greenhouse gas emissions into the same emissions unit, carbon dioxide equivalents (CO2E).
Green House Effect (GHE)Heating of air caused by allowing incoming solar radiation but inhibiting outgoing radiation. The warm air inside greenhouse causes its heating.
Green House Gases (GHGs)Greenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of infra-red radiation emitted by the earth’s surface, the atmosphere and clouds. This property causes the greenhouse effect. Six gases listed as GHGs in Kyoto Protocol are carbon dioxide, nitrous oxide, methane, hydroflurocarbons, perflurocarbons and sulphur hexachloride. Moreover, there are a number of entirely human made GHGs in the atmosphere such as the halocarbons and other chlorine and bromine containing substances, dealt with under the Montreal Protocol.