HR: 08:00h
AN: B51E-01 [Abstracts]
TI: Constraining the North American Carbon Sink with CO2 measurements from the NOAA/ESRL Aircraft Program
AU: Crevoisier, C
EM: ccrevois@Princeton.EDU
AF: Laboratoire de Météorologie, Dynamique/CNRS/IPSL
Ecole Polytechnique
91128 Palaiseau Cedex, France, Paris, 91128, France
AU: * Sweeney, C
EM: colm.sweeney@noaa.gov
AF: NOAA/ESRL Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
AU: Gloor, M
EM: E.Gloor@leeds.ac.uk
AF: Earth and Biosphere Institute,University of Leeds, Woodhouse Lane, Leeds, LS2 9JT,
United Kingdom
AU: Tans, P
EM: Pieter.Tans@noaa.gov
AF: NOAA/ESRL Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
AU: Peterson, S
EM: Sarah.Peterson
AF: NOAA/ESRL Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
AU: Wouter, S
EM: Sonja.wouter@noaa.gov
AF: NOAA/ESRL Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
AU: Karion, A
EM: Anna.Karion@noaa.gov
AF: NOAA/ESRL Global Monitoring Division, 325 Broadway, Boulder, CO 80305, United States
AB:
Profiles of CO2 mixing ratios collected from the NOAA/ESRL Aircraft Program are unique in their ability to
constrain estimates of the North American carbon sink. This three dimensional dataset which reaches as far
north as 65°N and as far south as 27°N between 500m above the ground and 8000m altitude
provides a valuable picture of the seasonal changes in CO2 mixing ratios over North America which does
not depend on 3-D transport models. The timing, amplitude and spatial distribution of CO2 mixing ratios at
19 aircraft profiles sites throughout North American not only provides an excellent benchmark for inverse flux
estimates but also provides the opportunity for independent estimates of the North American carbon sink. Here
we present a novel budgeting approach to estimate land-to-atmosphere fluxes, by relying mostly on CO2
vertical data and a climatological wind distribution. We find a sink of 0.51±0.39 GtC yr-1, moderate
compared to other estimates for the period 2004-2006, with the highest uptake occurring in the South-East
deciduous region, the agricultural Mid-West states and the Southern Boreal region.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting