1. CAALU National Greenhouse Gas Inventory Software Tool Stephen M. Ogle, Ph.D. Colorado State University Natural Resources Ecology Laboratory Fort Collins, Colorado USA Acknowledgements: Collaborators: Keith Paustian (Colorado State University), Linda Heath (US Forest Service), and Daniel Martino (Carbosur Consulting, Uruguay) Software Programmers: Mark Easter, Shannon Spencer, Gretchen Vanderburg, Ting Feng, and Aravind Sampath Software Beta Testers: Steve Williams and Marcelo Galdos Funding: US AID, US EPA, and USDA-FS

2. What is CAALU? Software program designed to estimate emissions (sinks) from source categories in Agriculture and LULUCF Sectors –IPCC methods (96 GL, 2000 GPG, 2003 GPG LULUCF) Has user-friendly interface guiding compiler through inventory process Extends design of IPCC worksheets with data management capabilities (MS Access ® ) Supports national reporting of GHG emissions to the UNFCCC

3. Key Advancements in CAALU for GHG Inventory Assessments Activity Data Management –Data automatically linked with source categories Accommodates IPCC Tier 1 and 2 Approaches –Including variable tier applications in single inventory Explicit Quality Assurance/Quality Control Steps –Activity data entry, factor assignments and calculations Archive of activity data, emission factors, and calculations –Self-contained database with all data and results –Institutional memory

5. CAALU Program Layout Inventory Process subdivided into 4 Modules –Module I: Activity Data –Module II: Factor Assignment –Module III: Calculations –Module IV: Reports Session Management –View QA/QC status of sessions –Open, edit and export emission factor files and country- specific soil, climate and land use subcategory files –Delete sessions –Backup database

6. Activity Data Requirements: Module I Land use and management –Areas for each land use forest lands, croplands, grasslands, settlements, wetlands and other lands by climate region and soil type maps of land use, climate and soil –Land management for forest lands, croplands and grasslands Livestock –Population numbers –Dairy cattle milk production –Manure management by system (digesters, lagoons etc.)

7. Activity Data Requirements (continued) Nitrogen fertilizer, lime (limestone and dolomite) and sewage sludge additions to soils Rice management –Water table management and organic amendment rates Crop residues –Crop yields to estimate residue amounts –residue:yield ratios; dry matter content of harvested grain; N:C ratios of residues Woody Plant Removal –Timber harvest in forest lands, agroforestry crop systems, and silvipastoral grassland systems –Gathering of wood for fuel –Disturbances that kill trees such as fires, pest outbreaks, hurricanes, etc.

8. Optional Data Inputs A variety of options are provided to incorporate country-specific data Climate, soil and land use subcategories Enhanced characterization for livestock Livestock nitrogen excretion rates Amount of living and dead biomass burned during grassland/savanna fires

9. Emission/Stock Change Factors Can use defaults provided in the tool or insert country-specific values Biomass C growth and loss factors Soil stock change factors and reference C stocks Soil N 2 O emission factors Enteric methane emission factors Manure methane and N 2 O emission factors Biomass burning factors Rice methane emission factors