TY - JOUR
T1 - Impact of Fraserdale CO2 observations on annual flux inversion of the North American boreal region
AU - Yuen, Chiu Wai
AU - Higuchi, Kaz
AU - Baker, D.
AU - Bousquet, P.
AU - Bruhwiler, L.
AU - Chen, Y. H.
AU - Ciais, P.
AU - Denning, A. S.
AU - Fan, S.
AU - Fung, I.
AU - Gloor, M.
AU - Gurney, K. R.
AU - Heimann, M.
AU - John, J.
AU - Law, R. M.
AU - Maki, T.
AU - Maksyutov, S.
AU - Pak, B.
AU - Peylin, P.
AU - Prather, M.
AU - Rayner, P.
AU - Sarmiento, J.
AU - Taguchi, S.
AU - Takahashi, T.
PY - 2005/7
Y1 - 2005/7
N2 - In TransCom-3 (Level 1), atmospheric CO2 measurements from 76 monitoring stations for the period 1992-1996 and 16 atmospheric transport models were used to constrain annual mean CO2 fluxes over 11 land and 11 ocean regions. The tower measurements of atmospheric CO2 from Fraserdale, a continental site in northern Ontario, Canada are now available and processed for use in the TransCom-3 inverse modelling framework. In this short study, we show that by including this set of continental CO2 data, the estimated flux for the North American boreal region becomes nearly zero, a reduction of about 0.26 Pg C yr-1 from the previous estimate. The uncertainty of the estimated flux for this region is also reduced by ∼30%. All transport models show negative changes for boreal North America, with the strongest responses (∼ -0.5 Pg C yr-1) shown by NIRE, NIES, CSU and SKYHI. Furthermore, models showing a strong response in boreal North America tend to show strong sensitivity in middle- and high-latitude Asian regions.
AB - In TransCom-3 (Level 1), atmospheric CO2 measurements from 76 monitoring stations for the period 1992-1996 and 16 atmospheric transport models were used to constrain annual mean CO2 fluxes over 11 land and 11 ocean regions. The tower measurements of atmospheric CO2 from Fraserdale, a continental site in northern Ontario, Canada are now available and processed for use in the TransCom-3 inverse modelling framework. In this short study, we show that by including this set of continental CO2 data, the estimated flux for the North American boreal region becomes nearly zero, a reduction of about 0.26 Pg C yr-1 from the previous estimate. The uncertainty of the estimated flux for this region is also reduced by ∼30%. All transport models show negative changes for boreal North America, with the strongest responses (∼ -0.5 Pg C yr-1) shown by NIRE, NIES, CSU and SKYHI. Furthermore, models showing a strong response in boreal North America tend to show strong sensitivity in middle- and high-latitude Asian regions.
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U2 - 10.1111/j.1600-0889.2005.00150.x
DO - 10.1111/j.1600-0889.2005.00150.x
M3 - Article
AN - SCOPUS:21644460850
SN - 0280-6509
VL - 57
SP - 203
EP - 209
JO - Tellus, Series B: Chemical and Physical Meteorology
JF - Tellus, Series B: Chemical and Physical Meteorology
IS - 3
ER -