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Appendix S1. Matlab code for calculating GHGV.

Appendix S2. Microsoft excel spreadsheet to accompany Matlab code (GHGVcalculator.xls).

Appendix S3. Methods for illustrative GHGV calculations.

Table S1. Definitions of ecosystem types.

Table S2. Organic matter storage (Mg dry matter ha-1) in aboveground biomass, root biomass, dead wood, organic layer of litter or peat, soil organic matter (SOM) in the top meter of mineral soil, and SOM vulnerable to loss upon cultivation. Reported are mean values, standard deviations (where applicable), number of sites contributing to the estimate, and references from which the values were obtained.

Table S3. Burn characteristics of combustible biomass for various ecosystem types. Listed are the fraction of combustible biomass consumed in a land clearing fire (fCBc; eq. 5), emission factors for CO2, CH4, and N2O (; eq. 5), categories within original references, and references.

Table S4. Decomposition constants for each biomass pool (combustible material, roots, peat, and soil organic matter) across a variety of ecosystem types (eq. 5, 7; also see above).

Table S5. Carbon dioxide flux (; kmol CO2 ha-1 yr-1), or net ecosystem production, in various ecosystem types. Sign convention: negative indicates carbon uptake by ecosystems. Listed are estimates, standard deviations (where available), number of sites contributing to the estimate, measurement methodology, and references.

Table S6. Methane flux, , from soils and enteric fermentation of livestock. Methanogenesis and methanotrophy values (median, n, and category) are as reported in a review by Le Mer & Roger (2001). All units kmol CH4 ha yr-1.

Table S7. Nitrous oxide flux (; kmol ha-1 yr-1) for various ecosystem types. Listed are means, standard deviations, number of sites contributing to the estimate, and notes.

Table S8. Anthropogenic CO2 emissions associated with agriculture: emissions from fertilizer production, lime application, and fuel use of farm equipment. All are expressed in units of kmol CO2 ha-1 yr-1.

Table S9. Contributions of storage and flux components to GHGV10050 (50 year emissions time span, 100 years analytical time span) of various ecosystem types. All units Mg CO2-eq/ha.

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FilenameFormatSizeDescription
GCB_2220_sm_appendix.doc50KSupporting info item
GCB_2220_sm_appendix2.xls63KSupporting info item
GCB_2220_sm_supplinfo.pdf210KSupporting info item

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.