Transcript Agricultural Soil C and N2O GHG Fluxes: Approaches and

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
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
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
CAALU Program Layout
• Inventory Process subdivided into 4 Modules
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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 countryspecific soil, climate and land use subcategory files
– Delete sessions
– Backup database
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.)
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.
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
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 N2O emission factors
• Enteric methane emission factors
• Manure methane and N2O emission factors
• Biomass burning factors
• Rice methane emission factors