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U.S. Black Carbon Inventory Current and Future Activities. Rebecca Lee Tooly Venkatesh Rao Office of Air Quality Planning and Standards Research Triangle Park, NC United States Environmental Protection Agency CEC Meeting October 6-7, 2010 Montreal Canada. Overview.
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Rebecca Lee Tooly
Office of Air Quality Planning and Standards
Research Triangle Park, NC
United States Environmental Protection Agency
October 6-7, 2010
NitrateAir quality / climate interaction (2 of 3)
Example: PM2.5 monitoring data (ug/m3)
About 6% of Global Total
About 3% of Global Total
More detailed look at mobile sources
More detailed look at biomass burning sources
“Current” Year All Sources
Conceptual Future, All Sources
Streets, D. G., Bond, T. C., Lee, T., and Jang, C.: On the future of carbonaceous aerosol emissions, J. Geophys. Res., 109, doi:10.1029/2004JD004902
Chapter 2, RtC, Frank, Tikvart, et al.
Different in a number of ways from GHGs
Domestic BC Emissions 2005
Domestic BC Emissions 2030
Relying on Streets, Bond paper(s) for most of the information on global BC/OC emissions
Combining fuel composition data and assumptions of combustion technologies and emissions controls
Similar to earlier work done in the literature (Klimont, 2002).
Emissions for a fuel/sector combination are calculated as an aggregate of the contributions of all technologies within that sector.
The total emissions for each country, in turn, are the sum across all fuel/sector combinations
These are “sub micron” inventories…inventories in PM2.5 range maybe 10-15% higher
See Bond et al. 2004 for more information…Global BC/OC Methods
Future work includes better understanding global methods for estimating emissions…
Objective: Calculate change in PM2.5 concentration and premature mortality that could be achieved by reducing BC emissions
Health impact function
Step 3a: Estimate health benefits
(Δ PM2.5-related mortality)
Step 2: Estimate Δ in PM2.5 concentrations
Step 3b: Estimate climate benefits
(Δ Direct Radiative Forcing)
Global chemical transport model
Radiative transfer model
on regional radiative forcing (RF)Work in ProgressStand alone radiative transfer model
Answer Policy-Relevant Questions, for example:
Open until September 22 at