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<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2>I suspect the lower number is a carbon emission factor,
rather than a carbon dioxide emission factor. Any high carbon
content fossil fuel is going to emit more than it's own weight in CO2 when
it is burned.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2>FYI, the WRI/WBCSD mobile combustion tool gives a default
emission factor for jet kerosene of 3.2 tonnes CO2 per tonne of
fuel.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2>... Duncan</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=528340119-25102007>
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size=2><STRONG><SPAN lang=EN-US
style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.0pt">Duncan
Noble</SPAN></STRONG></FONT></P>
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size=2><STRONG><SPAN lang=EN-US
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=2><EM><SPAN lang=EN-US
style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.0pt">- Value without Burden
-</SPAN></EM><SPAN lang=EN-US
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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><B><SPAN lang=EN-US
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size=2>_______________________________________________<o:p></o:p></FONT></SPAN></B></P>
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Canada</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.0pt">Tel:
+1.613.722.6629 ext. 224</SPAN></FONT></P>
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<FONT face=Tahoma size=2><B>From:</B> discuss-bounces@ghgnetwork.org
[mailto:discuss-bounces@ghgnetwork.org] <B>On Behalf Of </B>Russell,
Charles<BR><B>Sent:</B> October 25, 2007 12:31 PM<BR><B>To:</B>
Discuss@ghgnetwork.org<BR><B>Subject:</B> [GHG Network] Aircraft Jet Kerosene
emissions factors<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Dear
Colleagues<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">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 <st1:country-region w:st="on"><st1:place
w:st="on">UK</st1:place></st1:country-region>. Is the fuel composition
that different? Or am I doing the calculations wrong?
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">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 <st1:country-region
w:st="on"><st1:place w:st="on">UK</st1:place></st1:country-region> emission
factor for Jet Kerosene they are reporting at 0.853 tonnes CO2 per tonne JA
versus the IPCC default of 3.567.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">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!<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks in
advance.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Kind
regards.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Charles
Russell<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Dr Charles
Russell</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caledonian Environment
Centre</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Buchanan
House</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><st1:place w:st="on"><st1:PlaceName w:st="on"><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Glasgow</SPAN></FONT></st1:PlaceName><FONT
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<st1:PlaceName w:st="on">Caledonian</st1:PlaceName> <st1:PlaceType
w:st="on">University</st1:PlaceType></SPAN></FONT></st1:place><o:p></o:p></P>
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face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> G4
0BA</SPAN></FONT><o:p></o:p></P>
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style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Tel: 0141 331
8427</SPAN></FONT><o:p></o:p></P>
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Fax: 0141 273
1430</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Email:Charles.Russell@gcal.ac.uk</SPAN></FONT><o:p></o:p></P>
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style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Web:www.gcal.ac.uk/environment</SPAN></FONT><o:p></o:p></P>
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