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<p class=MsoNormal>Greetings. I am new to the Greenhouse Gas Experts
Network, and would like to introduce myself and the project I am working
on. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My name is Dr. Thomas Tomosky and I am the Application
Manager in the Travel Analytics group at TRX. One of the projects I am
working on is a CO2 emissions calculator for air travel. We attempted to
build this calculator in as detailed and accurate manner as possible. We
decided to make the calculator and the underlying calculations transparent, so
that interested parties can examine the details. The calculator has been
externally verified by ICF International, a leading energy and environmental
consulting firm. You can view the basic calculator at <a
href="http://carbon.trx.com" title="http://carbon.trx.com">http://carbon.trx.com</a>.
<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What follows is a very brief description of our basic Leg
Level CO2 emissions calculator. The full description is available upon
request. There are 8 major steps, the last 2 steps being optional.
They are:<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.25in'><o:p> </o:p></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Gather airline schedule data – city pair, number of
miles, operating carrier, aircraft, and number of seats. We use
schedule and fleet information from OAG Back Aviation
Solutions. <o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Determine fuel burn rates for aircraft and distance.
We obtain fuel burn rate information from the 2006 version of the
EMEP/CORINAIR Emission Inventory Guidebook. This data includes both
LTO and cruise fuel burn rates.<o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Calculate total CO2 emissions for the flight. We use
interpolation methods to accurately determine the amount of fuel burned,
and CO2 emitted, for a particular aircraft for a particular flight. <o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Allocate emissions between cargo and passengers.
From the US DOT, Bureau of Transportation Statistics, we determine the
amount of cargo (freight and mail) that scheduled passenger flights
transport. Based on weight percentages, we allocate the CO2
emissions between cargo and passengers. <o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Allocate emissions per cabin. Based on passenger seat
pitch and width data obtained from <a href="http://www.SeatGuru.com"
title="http://www.SeatGuru.com">www.SeatGuru.com</a>, we can determine the
amount of “real estate” taken up by a passenger’s seat
in each cabin. The greater the real estate, the greater the
emissions allocated to a seat in that cabin. <o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Adjust for passenger load factors. Typically,
airline flights are not 100% full, so we adjust emissions for the average
number of passengers for that carrier.<o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Adjust for RFI (optional). We allow web users to
adjust for the Radiative forcing Index or not, depending on their
particular needs. <o:p></o:p></li>
<li class=MsoNormal style='margin-bottom:10.0pt;line-height:115%;mso-list:
l0 level1 lfo1'>Calculate cost of CO2 emissions (optional). Since
the cost of CO2 emissions is highly variable, we provide web users with
information on the various emission offset options and trading markets and
give them the ability to adjust the cost per metric ton of CO2 to suit
their needs.<o:p></o:p></li>
</ol>
<p class=MsoNormal>For our corporate clients, we go a few steps further than
the basic Leg Level calculator on the web. In our Enterprise Level
calculator, we take a client’s air travel footprint for a period of time,
normally a calendar year, and analyze it in detail. We quantify the
amount of CO2 emissions, and we compare those emissions with the emissions
resulting from the use of the “greenest” carrier for each city pair
and to an “average” corporate travel footprint. We recommend
and quantify ways of reducing CO2 emissions by reducing travel, booking the
greenest carriers, and eliminating unnecessary connections. For client
trips that are not on scheduled non-stop flights, we employ a proprietary
algorithm which builds reasonable connections between city pairs. This is
important since connections can use different equipment, have different fuel
burn rates, number of seats, and so on.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>If you have comments on our model, or are interested in
learning more, please contact me or our VP and General Manager, Scott
Gillespie. We are especially interested in new data sources which can
further improve the accuracy of our model. I can be contacted at <a
href="mailto:thomas.tomosky@trx.com" title="mailto:thomas.tomosky@trx.com">thomas.tomosky@trx.com</a>
or at 724-924-6070. Scott can be contacted at <a
href="mailto:scott.gillespie@trx.com" title="mailto:scott.gillespie@trx.com">scott.gillespie@trx.com</a>
or at 440-248-4111. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thank you.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Tom<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thomas
K. Tomosky, Ph.D.</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Application
Manager, Travel Analytics</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>TRX<br>
2175 Princeton Road</span><span style='font-size:7.5pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>New
Castle, PA 16101 USA<br>
<a
href="outbind://25-00000000EF3469787771D511AE2200508BC9E1260700AFAEC7F33CBBD411AE1300508BC9E12600000126423E0000F66965CFA3FB824D837B89B38F04EEF7000000B8F4C80000/www.trx.com"
title="outbind://25-00000000EF3469787771D511AE2200508BC9E1260700AFAEC7F33CBBD411AE1300508BC9E12600000126423E0000F66965CFA3FB824D837B89B38F04EEF7000000B8F4C80000/www.trx.com"><span
style='color:black'>www.trx.com</span></a><br>
<br>
email: <a href="mailto:thomas.tomosky@trx.com"
title="mailto:scott.gillespie@trx.com"><span style='color:blue'>thomas.tomosky@trx.com</span></a><br>
office: 724-924-6070</span><span style='font-size:7.5pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>fax:
724-924-2867<br>
<br>
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