HR: 18:15h
AN: B74A-08    [Abstracts]
TI: Nested Inversion of the North America Carbon Flux with Forest Stand Age Constraint
AU: * Deng, F
EM: dengf@geog.utoronto.ca
AF: University of Toronto, 100 St. George St., Room 5047, Toronto, ON M5S 3G3, Canada
AU: Chen, J M
EM: chenj@geog.utoronto.ca
AF: University of Toronto, 100 St. George St., Room 5047, Toronto, ON M5S 3G3, Canada
AU: Mo, G
EM: gangmo@geog.utoronto.ca
AF: University of Toronto, 100 St. George St., Room 5047, Toronto, ON M5S 3G3, Canada
AU: Pan, Y
EM: ypan@fs.fed.us
AF: USDA Forest Service, Northern Research Station 11 Campus Blvd., Suite 200, Newtown Square, PA 19073, United States
AU: Birdsey, R
EM: rbirdsey@fs.fed.us
AF: USDA Forest Service, Northern Research Station 11 Campus Blvd., Suite 200, Newtown Square, PA 19073, United States
AU: McCullough, K
EM: kevinmccullough@fs.fed.us
AF: USDA Forest Service, Northern Research Station 11 Campus Blvd., Suite 200, Newtown Square, PA 19073, United States
AU: Peters, W
EM: Wouter.Peters@noaa.gov
AF: Wageningen University and Research centre, Costerweg 50 Building no. 400 6701 BH, Wageningen, Netherlands
AU: Krol, M
EM: M.C.Krol@uu.nl
AF: Wageningen University and Research centre, Costerweg 50 Building no. 400 6701 BH, Wageningen, Netherlands
AU: Xiao, J
EM: jing@psu.edu
AF: Department of Meteorology, Penn State, Walker Building, Rm 416, State College, PA 16802, United States
AB: On the basis of our previous inversion using GlobalView CO2 data for 30 regions of the North America and 20 regions for the rest of the globe, we have improved the inversion results through an additional constraint using a forest stand age map of the USA and Canada. The first version of this age map has been produced through a collaborative effort. It is demonstrated through our ecosystem modeling that the forest carbon source and sink distribution is closely related to forest stand age, and this source of information would be useful for constraining the CO2 flux inversion for the 30 sub-continental regions. For this purpose, we have converted the forest age map into an age factor map, indicating the overall forest age structure is in favor of carbon uptake, and the USA southeast region is the most favorable region. This spatial distribution pattern of the age factor significantly altered the nested inversion results. We have also explored the effect of the diurnal variation of terrestrial ecosystem and atmospheric boundary layer on the inversion results. For this purpose, we used a terrestrial ecosystem model and an atmosphere transport model with short time steps to reflect the diurnal pattern of them. In this presentation, the improvements in the North America carbon cycle estimation using this additional forest age constraint and through the diurnal timing normalization will be assessed by comparing with bottom-up results in Canada and USA.
DE: 0428 Carbon cycling (4806)
DE: 0466 Modeling
DE: 0490 Trace gases
SC: Biogeosciences [B]
MN: 2009 Joint Assembly