Above Ground Carbon

I have am having some problem with the REDD project tool and will need some help in moving forward with the project I am doing;

a) In the Calculate CO2 Emissions panel, I included Above ground carbon pool (constant), below ground carbon pool (cairns), soil organic carbon (constant)

b) I realized that because the soil organic carbon pool was added the continue bottom was grayed...(inactivated). The bottom was activated when the soil carbon pool was excluded from the carbon pool above. Why does this happen?

c) In the carbon density table, I put in a specific value for AB, but the value was rejected, with the error message that "AB values must NOT be above 32767. Why is this, and why can I NOT specify my own value?

d) So, I decided to play along with the software and specified 32767 as the value for AB. After running for a while (almost at the end of the process) I got another error message saying that the two input images did not have the same number of pixels... What images is the software referring to here? I do not think it is about first two images (LCM project parameters), because they were standardized by the software itself and have equal rows and columns. What images is the software referring to?

e) Seeing that I couldn't go any further with the use of raster images, I decided to switch the REDD inputs to vectors and NOT long in to the process I got another error message stating that "the vector and raster reference system do not match". I know very well that I used the project tool to correct the reference of the vector files to match that of the raster.

Please, what am I doing wrong here and how can I solve these menacing problems. I do need your help badly.

Thanks in advance for all your help.

Siewe3

Clark Labs September 13, 2013 19:38

Siewe,

There is a limit to the tons of carbon that can be input which is 32767. The limit is there as it is unlikely that any above ground or below ground estimates would be that large per hectare. Remember, the number is calculated in tC ha-1. If you want to exceed this number then the best workaround would be to use some fraction of your reality and then multiply that back in the spreadsheet results.

As for the other errors, recall that before you run REDD you must have the results from the land change prediction. Then in REDD you need to enter two more maps, the leakage and project area maps. These maps must coincide spatially with the land cover and driver variable maps used in the prediction.

Regards,

James Toledano

Clark Labs

Siewe Siewe September 19, 2013 18:52

Thank you James.

Above Ground Carbon

2 comments