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LCFS Indirect Land Use Change Expert Workgroup Carbon Emission Factors Subworkgroup July 2010 Update.

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Presentation on theme: "LCFS Indirect Land Use Change Expert Workgroup Carbon Emission Factors Subworkgroup July 2010 Update."— Presentation transcript:

1 LCFS Indirect Land Use Change Expert Workgroup Carbon Emission Factors Subworkgroup July 2010 Update

2 Membership Sonia Yeh (University of California, Davis) – Co-chair Richard Nelson (Kansas State University) – Co-chair Uwe Fritsche (Oeko-Institut, Germany) Holly Gibbs (Stanford University) Keith Kline (ORNL) Steffen Mueller (University of Illinois at Chicago) Don O’Connor (representing CDFA, S&T Consulting) Michael O’Hare (University of California, Berkeley) ARB staff representative: Kevin Cleary Special thanks to: – Sahoko Yui, graduate student, UC Davis – Susan Tarka Sanchez, Lifecycle Associates 2 LCFS Indirect Land Use Change Expert Workgroup July Update

3 For each task, we will discuss the following in the August Interim Report: Approaches taken by CARB’s analysis Approaches taken by EPA’s analysis Other approaches and considerations Preliminary recommendations LCFS Indirect Land Use Change Expert Workgroup July Update 3

4 Updates of Major Tasks - Databases Review and compare between EPA-Winrock, CARB-Woods Hole and several other major C emission factor datasets and methodology – Land types and associated cover – Degradation factors to existing forestland – Data (and the spatial resolution) on C stock (biomass C and soil C), fluxes (sources and sinks) in the reference scenario – Identify additional datasets on carbon stock and fluxes and the methodology and assumptions that can be used to improve ILUC analysis (associated with specific scenarios) Develop quantitative comparison of biomass/soil C stock and emissions by region and by type within the same database, and across database 4 LCFS Indirect Land Use Change Expert Workgroup July Update

5 Major Database Included in Our Review CARB-Woods Hole Research Center (WHRC) National data (USA, Brazil) on emissions from shifting land use EPA - Winrock FAO – Forestry Resources Assessment 2005 (FRA 2005) 2006 IPCC Guidelines for National Greenhouse Gas Inventories (IPCC 2006) New IPCC Tier-1 Global Biomass Carbon Map for the Year 2000 Global Above-and Below-ground Living Biomass Carbon Density (R&G) C stock estimates for tropical landscapes (Gibbs 2008) 5 LCFS Indirect Land Use Change Expert Workgroup July Update

6 WHRCFRAIPCCEPAR&GGibbs 2008 Land use categories 262 (Forest/Other Wooded Land) 6 (Forest/Cropland/G rassland/Wetlands/ Settlments/Other) IGBP 9 land cover classification 10 (Broadleaf Forest/Needleleaf Forest/ Mixed Forest/Natural- Burnt Forest/Crop/Forest Mosaic/Shrub Cover/Grassland/Sp arse Grassland/Other) Tropical Landscapes IPCC (Natural land from IPCC; Crops yield from Monfreda 2008) Regions10229 Countries 750 regions across 160 countries 7 continental regions 4 - America/Sub- saharan Africa/SE Asia/Pantropics Data collection method GREET/FAPRI- CARD/Woods Hole Research Center (Houghton) Varies from country to country (data from national correspondents) Tier 1 = defaults (tier 2 = specific/regional; tier 3 = very specific/regional data) DAYCENT/CENT URY Model; FASOM; FAPRI- CARD; MODIS V5 Data Collection between various existing data Obtained data from IPCC Tier 1 and Monfreda 2008 and used following calculation: (C (land source) - C (biofuel crop))/(Biofuel Carbon savings/ha/year) Carbon pools examined: Above ground biomass Below ground biomass Deadwood Litter Soil C 6 LCFS Indirect Land Use Change Expert Workgroup July Update

7 Updates of Major Tasks – Emission Factors Changes in Biomass C Stocks – General equations – Harvested wood products Changes in Soil C Stocks Changes in Carbon Carrying Capacity – Incremental or foregone sequestration Peatland Emissions Fire Emissions Soil C reversion – Changes when degraded/frequently burned lands come under management Other Emission Factors (next slide) LCFS Indirect Land Use Change Expert Workgroup July Update 7

8 Updates of Major Tasks – Emission Factors Other emission factors: – Additional fertilizers that will be required to improve yield (R Nelson) – Other inputs changes (e.g energy inputs +/-) associated with yield and/or management changes(D O'Connor) – Credits for crops that sequester N2O (R Nelson) – GHG emissions from land that stayed in the same use category but changed management practices (D O'Connor) – Accounting of harvested wood (S Mueller) – Other non-GHG aerosols and gases, such as ozone precursors, carbon monoxide (CO), nitrogen oxides (NO x ), sulfur oxides (SO x ), and black carbon (BC) (R Plevin) – Albedo and latent heat ( J Kløverpris) – Mode of clearing (burning vs. smoldering vs. mechanical) affects the BC and CO emission factors (R Plevin) LCFS Indirect Land Use Change Expert Workgroup July Update 8

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