Guidebook on Preparing Airport Greenhouse Gas Emissions Inventories (2009) / Chapter Skim
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Glossary
Glossary
Pages 40-48
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From page 40... ...
Aerosols can also originate as a result of human activities and are often considered pollutants. Aerosols are important in the atmosphere as nuclei for the condensation of water droplets and ice crystals, as participants in various chemical cycles, and as absorbers and scatterers of solar radiation, thereby influencing the radiation budget of the Earth's climate system.
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Fossil fuels were at one time biomass and continue to store the carbon until burned. Carbon Sinks: Carbon reservoirs and conditions that take in and store more carbon (i.e., carbon sequestration)
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Increased concentrations of carbon dioxide, methane, and nitrous oxide, CFCs, HFCs, PFCs, SF6, NF3, and other photochemically important gases caused by human activities such as fossil fuel consumption, trap more infrared radiation, thereby exerting a warming influence on the climate. Enplanements: The number of passengers on a departing aircraft.
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From page 43... ...
They do not significantly deplete the stratospheric ozone layer, but they are powerful GHGs with global warming potentials ranging from 140 (HFC-152a)
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The ICLEI Cities for Climate Protection (CCP) Campaign assists cities in adopting policies and implementing quantifiable measures to reduce local GHG emissions, improve air quality, and enhance urban livability and sustainability.
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: A powerful GHG with a global warming potential most recently evaluated at 310. Major sources of nitrous oxide include soil cultivation practices, especially the use of commercial and organic fertilizers, fossil fuel combustion, nitric acid production, and biomass burning.
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PFCs do not harm the stratospheric ozone layer, but they are powerful GHGs: CF4 has a global warming potential (GWP)
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GHG emissions to "levels that would prevent dangerous anthropogenic interference with the climate system." The UNFCCC also requires that all signatory parties develop and update national inventories of anthropogenic emissions of all GHGs not otherwise controlled by the Montreal Protocol. See http://www.ipcc.ch/ Vehicle Miles Traveled (VMT)
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From page 48... ...
: The World Resources Institute (WRI) is an environmental think tank.
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