GHG Planting Calculator

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prateek13pat
Posts: 2
Joined: Wed Aug 08, 2018 3:32 pm

GHG Planting Calculator

Post by prateek13pat » Wed Aug 08, 2018 3:40 pm

Hello!

I have a question about the impact of location on carbon sequestration rates. Keeping everything else the same, I just changed the location for an American Elm tree in the GHG Planting Calculator and came up with the following lifetime sequestration numbers in lbs of CO2:

San Francisco CA 45,750.80
San Diego CA 36,869.60
Denver CO 5,770.80
Chicago IL 5,770.80
Oklahoma City OK 12,550.70
Austin TX 19,728.10
Seattle WA 19,728.10
Dallas TX 19,728.10
Washington DC 12,550.70
New York NY 12,550.70
Portland OR 12,550.70

Does changing location affect growth rate? I couldn't find an answer by reading David Nowak and Daniel Crane's papers. Is there a way to understand the back-end calculation here? Thanks.
Jason.Henning
i-Tree Team
Posts: 138
Joined: Fri Dec 21, 2012 7:45 am

Re: GHG Planting Calculator

Post by Jason.Henning » Thu Aug 09, 2018 10:38 am

Thanks for your question. The methods in the GHG Planting Calculator are actually adapted from i-Tree Streets which is a region based empirical model. Essentially, the tool "maps" the entered trees onto trees that were measured in the same climate/growth zone and assumes that these trees would sequester comparable amounts of carbon. It is not necessarily using traditional tree growth models. The methods underlying i-Tree Streets were originally put together by Greg McPherson and others in a series of Community Tree Guides. These Community Tree Guide are collected under the i-Tree Streets heading in our "Methods and Files" section, http://www.itreetools.org/resources/archives.php. The specific carbon methods were originally put forth in this publication, https://www.fs.fed.us/psw/publications/ ... gtr171.pdf. Lastly, you may want to view this "Climate Zone" map, http://www.itreetools.org/streets/image ... _zones.jpg, which shows how different cities may be assigned to different climate zones and therefore be assigned different growth and sequestration rates.

-Jason
prateek13pat
Posts: 2
Joined: Wed Aug 08, 2018 3:32 pm

Re: GHG Planting Calculator

Post by prateek13pat » Thu Aug 09, 2018 1:28 pm

This is all very helpful, Jason - thanks a lot!
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