| longname |
|---|
Q799. What are the global warming potentials (GWPs) used in publication of GHGRP data? |
A799. See Table A-1 for the complete list of gases and their updated GWPs. Effective reporting year 2013, the GHGRP updated many of the GWP values chemical-specific and default GWPs used to calculate reporters’ emissions in carbon-dioxide equivalent (CO2e). These GWP values were updated from values provided in Intergovernmental CO2e) under the GHGRP. Most of the chemical-specific GWPs are drawn from the Intergovernmental Panel on Climate Change’s (IPCC) Second Fourth Assessment Report (AR4), but the chemical-specific GWPs for some fluorinated GHGs (those that did not have GWPs in AR4) are drawn from the IPCC Fifth Assessment Report (AR5). The default GWPs for the various groups of fluorinated GHGs are based on both AR4 and AR5 GWPs for chemically similarly fluorinated GHGs. All GWPs are calculated over a 100-year time horizon.
Effective reporting year 2014, the EPA revised Table A-1 to add GWPs for fluorinated GHGs and fluorinated heat transfer fluids (HTFs) that previously did not have GWPs. Because emissions of fluorinated GHGs and HTFs without GWPs generally did not count toward CO2e totals, this change has increased the completeness and accuracy of the CO2e emissions calculated and reported by suppliers and emitters of fluorinated GHGs and HTFs.
SAR) to those in the Fourth Assessment Report (AR-4). To present a consistent time-series, EPA has provided re-calculated prior year GHG totals. These re-calculations do not impact the raw affect the raw data submitted by facilities.
| Wiki Markup |
|---|
{show-to:group=confluence-Users}{center}{_}Footer / References Bar which is Visible to the public{_}{center}{show-to} |
...
| Wiki Markup |
|---|
{show-to:group=confluence-Users}
{info}
Source: Brian Cook, 8/12/2014, and revised 9/12/2014, and again 10/5/2015
Approval / Publishing History: Version 1, published 10/1/14
Expiration: None
Relevant Subpart/Component: GHG Data and Publication
{info}{center}{_}History Panel For Internal Use - Not Visible to the Public{_}{center}{show-to} |
...