Most greenhouse gases have GWP more than CO2, therefore more than 1. Lean, D.C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schulz and R. Van Dorland (2007), This is so, because of the reaction formula: CH, These are normalized absorbance spectrum; these must be compensated for using the, Intergovernmental Panel on Climate Change, "Anthropogenic and Natural Radiative Forcing", Anthropogenic and Natural Radiative Forcing, "Changes in Atmospheric Constituents and in Radiative Forcing", "HYDROGEN FOR HEATING: ATMOSPHERIC IMPACTS A literature review", "Radiative forcing of carbon dioxide, methane, and nitrous oxide: A significant revision of the methane radiative forcing: Greenhouse Gas Radiative Forcing", "Assessment of methane emissions from the U.S. oil and gas supply chain", "Methane released in gas production means Australia's emissions may be 10% higher than reported", New Greenhouse Gas Discovered, PFTBA Has Higher Global Warming Impact Than CO2, Radiative efficiency definition of Radiative efficiency in the Free Online Encyclopedia, Newly discovered greenhouse gas '7,000 times more powerful than CO2' | Environment, New greenhouse gas discovered by U of T chemists | Toronto Star, "Testing 100-year global warming potentials: Impacts on compliance costs and abatement profile", "Report of the Conference of the Parties on its 19th Session", "Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2018, page ES-3", Regulation (EU) No 517/2014 of the European Parliament and of the Council of 16 April 2014 on fluorinated greenhouse gases, http://www.chem.arizona.edu/chemt/C21/sim/gh/, "Understanding Global Warming Potentials", Matthew Elrod, "Greenhouse Warming Potential Model. Other metrics: Global Temperature change Potential (GTP), Myhre, G., D. Shindell, F.-M. Bréon, W. Collins, J. Fuglestvedt, J. Huang, D. Koch, J.-F. Lamarque, D. Lee, B. Mendoza, T. Nakajima, A. Robock, G. Stephens, T. Takemura and H. Zhang (2013), Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D.W. Fahey, J. Haywood, J. For other gases it depends on the gas and the time frame. 0000000016 00000 n 0000002627 00000 n Carbon dioxide (CO2) equivalent is a measure of how much a gas contributes to global warming, relative to carbon dioxide. CO2). endstream endobj 634 0 obj<>/Size 600/Type/XRef>>stream 0000022626 00000 n .-3��v�0ʸyxy#�\� /��V��F�JM��f���x}���f���A+��8��M}a$�h�qe��C���#3�\��&�54�|�(}�R�0k�g�5DŽ����T�h��ʛ�A����4�����`lfc�а �(a� The radiative efficiencies ax and ar are not necessarily constant over time. 0000023088 00000 n You calculate the carbon dioxide equivalent of a … 0000002525 00000 n For example CO2e of 500 parts per million would reflect a mix of atmospheric gases which warm the earth as much as 500 parts per million of CO2 would warm it.[25][26]. 2.94 metric tons CO 2 equivalent /short ton of waste recycled instead of landfilled × 1 short ton/2,000 lbs × 111 lbs of waste/cubic yard × 1 cubic yard/173.57 dry gallons × 25 gallons/trash bag = 2.35 x 10-2 metric tons CO 2 2 equivalent (GtCO 2 eq) In industry: million metric tonnes of carbon dioxide equivalents (MMTCDE) and MMT CO2 Eq. 0000009011 00000 n Calculation of GTP requires modeling how the world, especially the oceans, will absorb heat. trailer 0000017569 00000 n [20] The dependence of GWP on the wavelength of absorption is more complicated. [12], Under the Kyoto Protocol, in 1997 the Conference of the Parties standardized international reporting, by deciding (decision 2/CP.3) that the values of GWP calculated for the IPCC Second Assessment Report were to be used for converting the various greenhouse gas emissions into comparable CO2 equivalents. xref 0000023272 00000 n Water vapour is one of the primary greenhouse gases, but some issues prevent its GWP to be calculated directly. 0000011470 00000 n 0000022987 00000 n For any amount of any gas, it is the amount of CO2 which would warm the earth as much as that amount of that gas. [9] PFTBA has the highest radiative efficiency (relative effectiveness of greenhouse gases to restrict long-wave radiation from escaping back into space[10]) of any molecule detected in the atmosphere to date. GTP is published in the same IPCC tables with GWP.[1]. Absi represents the integrated infrared absorbance of the sample in that interval, and Fi represents the RF for that interval. 0000001614 00000 n x�b```b``���������ǀ |@1v��M �K6v5����̕����ƹ��a�q�Ң�� &&��� For this reason when quoting a GWP it is important to give a reference to the calculation. x�bb�d`b``Ń3� ���ţ�1����` � h [8] If you started with 1 tonne of methane which has a GWP of 25, after combustion you would have 2.74 tonnes of CO2, each tonne of which has a GWP of 1.
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