Work Package 2: Annual assessment

Leader: Dorothee Bakker

Objectives
- Compilation of a first best estimate of CO2 air/sea exchange fluxes between the atmosphere and
the Atlantic Ocean basin, including its polar extensions and the exchanges with the European
Union comprising the European coastal seas and the European continent for the year 2005 (annual
mean, seasonal).
- Integration of this first best estimate into large scale global estimates in the Global Carbon Project,
notably for (a) the world oceans, (b) the Southern Ocean, and (c) the Northern hemisphere
CO2 sinks (sources) in Europe, Asia and North America.
- Critical evaluation of the methods applied for further prioritising of the most promising ones.
- Summary on annual/seasonal air/sea flux estimates from previous research for measuring the
improvement for further quantifications.

Description of work
The annual/and seasonal CO2 fluxes in the domain of the Atlantic basin including European regional
seas for 2005 will be combined from: (a) ongoing and new measurement campaigns in critical
areas (WPs 4, 5, 7), (b) processing, interpretation and assembly of own data (WP 6), (c) combination
of surface measurements with VOS and buoys data of other nations (notably USA,
Canada) (WPs 4-6), (d) assembly of data by complementary CarboEurope project (WP 15),
(e) modelling at regional, hemisphere and global scale (WPs 1, 11, 12-14, 17) (all partners).
Integration of the above estimates with air/land fluxes of Eurasia (CarboEurope), of the Amazon
forest region (CarboEurope) and of North America by our US counterparts, as well as fluxes for the
Indian and Pacific Oceans (Global Carbon Project) into an integrated global annual (seasonal) flux
estimate (WPs 1, 3) (all partners).