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<TITLE>Re: [GHG Network] Aircraft Jet Kerosene emissions factors</TITLE>
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<FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Dear Charles:<BR>
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I see (2006 IPCC Guidelines: Energy: Mobile Emissions: Aviation, page 3.71, footnote 11 to Table 3.6.9): “</SPAN></FONT><SPAN STYLE='font-size:12.0px'><FONT FACE="Times, Times New Roman">CO2 for each aircraft based on 3.16 kg CO2 produced for each kg fuel used.” I have not verified the units used by UK for Jet-A, but assuming they report C, not CO2, the agreement is good: 3.16 kg CO2 / 3.667 CO2/C = 0.862 kg C. Let me know if you find that UK reports EF in CO2.<BR>
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IPCC 2006, Table 3.6.4 gives EF in kg CO2/TJ (71 500 kg CO2/TJ, with high and low range).<BR>
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I’m interested in your results, and invite you to let me know what you come up with.<BR>
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Best, -Rick-=<BR>
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</FONT></SPAN><FONT SIZE="2"><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10.0px'>****************@*******************<BR>
Richard Heede <heede@climatemitigation.com><BR>
Climate Mitigation Services<BR>
1626 Gateway Road<BR>
Snowmass, CO 81654-9214 USA<BR>
1-970-927-9511 office<BR>
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<°){{{{>< <°){>< <°){{{{>< <BR>
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On 10/25/07 10:07 AM, "Russell, Charles" <Charles.Russell@gcal.ac.uk> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Dear Colleagues<BR>
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I am conducting some work considering transatlantic flights. Please could someone explain to me why there is such a difference in the CO2 emission factor for Jet Kerosene between North America and the UK. Is the fuel composition that different? Or am I doing the calculations wrong? <BR>
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There is a growing number of airlines offering offsetting (love it or hate it – I’m just doing my job) – but is there an international standard for this. I have run the IPCC tier 2 on methodology for the data I have and used the IPCC default EF – but when I compare the tonnages with the those for equivalent flights with other companies then I am coming out much higher. In reviewing the UK emission factor for Jet Kerosene they are reporting at 0.853 tonnes CO2 per tonne JA versus the IPCC default of 3.567.<BR>
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Probably this is something that has been discussed before but ever keen to bring all integrity possible to the issue of offsetting – I need to understand what is going on or where I am going wrong with my calculations!<BR>
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Thanks in advance.<BR>
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Kind regards.<BR>
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Charles Russell<BR>
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Dr Charles Russell<BR>
Caledonian Environment Centre<BR>
Buchanan House<BR>
Glasgow Caledonian University<BR>
Cowcaddens Road<BR>
Glasgow G4 0BA<BR>
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</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Tel: 0141 331 8427<BR>
Fax: 0141 273 1430<BR>
Email:Charles.Russell@gcal.ac.uk<BR>
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</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Web:www.gcal.ac.uk/environment<BR>
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