Fossil fuel CO2 and CH4 emissions (mass, isotopic, spatial and temporal descriptions)

Session organizers: Robert Andres, Marc Fischer, Kevin Gurney

Brief summary of the topic: Focus on development and testing of higher spatial and temporal resolution fossil fuel data products and better integration of planned and existing data products into other NACP activities.

Relevance: To better integrate one of the better known fluxes in the NACP C cycle into the broader NACP efforts.

Products expected:

1. Identification of fossil fuel CO2 and CH4 emission inventory attributes needed for progress on NACP objectives,

2. Inventory of existing and planned fossil fuel inventory data products,

3. Recommended research to assess uncertainties in emission inventories,

4. Discussion on how to better integrate these products into other NACP activities, and

5. Discussion on strategy for intercomparison effort of existing and planned data products.

Agenda

1. Individual presentations requested by e-mail2. Focused discussion of five expected products from last slide

1. Identification of fossil fuel CO2 and CH4 emission inventory attributes needed for progress on NACP

objectivesDesired attributes:

emissions by sector

by time segment (temporal scale undefined)

by location (spatial scale undefined)

measured variables: mass Ctotal

14C

13C

2. Inventory of existing and planned fossil fuel inventory data products

Recognition that there are two main CO2 products now available:

CDIAC and VULCAN products

Call for a comparison paper

listing strengths and weaknesses of each productrecommendations for types of studies for which each product

is best suited

3. Recommended research to assess uncertainties in emission inventories

Not much directed discussion on this point,

but comparison with atmospheric measurements, especially utilizing 14C, suggested

May want to use different comparison species/correlations whether in an urban or rural grid cell

4. Discussion on how to better integrate these products into other NACP activities

Not much directed discussion on this point,

but upcoming DOE/EIA and EPA meetings mentioned

Closer involvement of inventory compilers and model users

5. Discussion on strategy for intercomparison effort of existing and planned data products

Comparison of CDIAC, VULCAN, and atmospheric sample recordsmasstime trends in data