The biofuel bpch files were created by Ray Nassar 2010 March 11.

It was based on the following ASCII data (developing world only - Table 13 in Yevich and Logan):

* The woodfuels file is called WDF.1x1 and total of all 1x1 boxes is 1323.17 Tg
* The residue/dung biofuels file is CMB.1x1 and total is              732.82 Tg 

The following component was not included since this is now better represented by GFED.

* The burning-in-fields file   is BIF.1x1 and totals                  406.36 Tg

Emission Factors (CO2 g/kg) used for CO2 were:

Woodfuel            1467 / 0.45  (Table 22)
Burn-in-fields      1132 / 0.40  (Table 24)
Residue             1192 / 0.40  (Table 22)
Dung                1010 / 0.35  (Table 22)
Residue and Dung    1161.5 / 0.3916 based on weighting in Table 13 (Residue 239 Tg + Dung 48 Tg)

Note: The above includes the factor for conversion of g DM to g C (Appendix B)

Scaling the 1985 values to 1995 values was done for 3 separate regions based on Table 16.

180-30W Latin America
30W-60E Africa (including Middle East)
60-180E Asia

REFERENCES

Yevich, R. and J.A. Logan, An assessment of biofuel use and burning of
agricultural waste in the developing world, Global Biogeochemical Cycles, 17(4), 1095,
doi:10.1029/2002GB00152 (2003).