Using continental observations in global atmospheric inversions of CO₂: North American carbon sources and sinks

References

• Aalto, T., Hatalcka, J., Paatero, J., Tuovinen, J.-P., Aurela, M. and co-authors. 2002. Tropospheric carbon dioxide concentrations at a north-ern boreal site in Finland: basic variations and source areas. Tellus 54B, 110-126.
   Google Scholar
• Andrews, A. E., Kofler, J., Balcwin, P. S., Zhao, C. and Tans, P. 2008. Carbon dioxide and carbon monoxide dry air mole fractions from the NOAA ESRL Tall Tower Network, 1992-2008. Version: 11 Dec 2008, Path: ftp://ftp.cmdl.noaa.gov/ccg/towers/.
   Google Scholar
• Apadula, E, Gotti, A., Pigini, A., Longhetto, A., Rocchetti, F. and co-authors. 2003. Localization of source and sink regions of carbon dioxide through the method of the synoptic air trajec-tory statistics. Atmos. Environ. 37, 3757-3770. doi:10.1016/51352-2310(03)00505-3.
   Google Scholar
• Apadula, E, Artuso, F., Chamard, P., De Nile, F., diSarra, A. and co-authors. 2005. The network for background CO2 measurement in Italy, 12th WMO/IAEA Meeting of Experts on Carbon Dioxide Con-centration and Related Tracer Measurement Techniques. World Me-teorological Organization Global Atmosphere Watch Report no. 161 (VVMO TD no. 1275), 173-175.
   Google Scholar
• Artuso, F., Chamard, P., Piacentino, S., Sferlazzo, D., De Silvestri, L. and co-authors. 2009. Influence of transport and trends in atmospheric CO2 at Lampedusa. Atmos. Environ. 43 (19), 3044-3051.
   Web of Science ®Google Scholar
• Baker, D. F., Law, R. M., Gurney, K. R., Rayner, P., Peylin, P. and co-authors. 2006. TransCom 3 inversion intercomparison: Impact of transport model errors on the interannual variability of regional CO2 fluxes, 1988-2003. Global Biogeochem. Cycles 20, GB1002. doi:10.1029/2004GB002439.
   Google Scholar
• Baker, I. T., Prihodko, L., Denning, A. S., Goulden, M., Miller S. and co-authors. 2008. Seasonal drought stress in the Amazon: Rec-onciling models and observations. J. Geophys. Res. 113, GOOB01. doi:10.1029/2007JG000644.
   Google Scholar
• Balcwin, P. S., Tans, P. P., Hurst, D. F. and Zhao, C. 1998. Measurements of carbon dioxide on very tall towers: results of the NOAA/CMDL program. Tellus 50B, 401–415.
   Google Scholar
• Bloom, S., da Silva, A. and Dee, D. 2005. Documentation and Validation of the Goddard Earth Observing System, Version 4. Technical Report Series on Global Modeling and Data Assimilation, Greenbelt, MD.
   Google Scholar
• Bousquet, R, Peylin, P., Ciais, P., LeQuere, C., Friedlingstein, P. and co-authors. 2000. Regional changes in carbon dioxide fluxes of land and oceans since 1980. Science 290, 1342–1346.
   Google Scholar
• Brenkert, A. L. 1998. Carbon dioxide emission estimates from fossil-fuel burning, hydraulic cement production, and gas flaring for 1995 on a one degree grid cell basis. NDP-058A, Carbon Dioxide Inf. Anal. Cent. Oak Ridge Natl. Lab., Oak Ridge, Tenn., USA.
   Google Scholar
• Brunke, E. 2007. Atmospheric CO2 hourly concentration data, Cape Point Global Atmosphere Watch station. In: World Data Center for Greenhouse Gases. Japan Meteorol. Agency, Tokyo. Version: 18 Mar 2008, Available at: http://gaw.lcishou.go.jp/wdegg.html.
   Google Scholar
• CCSP. 2007. The First State of the Carbon Cycle Report (SOCCR): the North American Carbon Budget and Implications for the Global Carbon Cycle. In: A Report by the U.S. Climate Change Science Pro-gram and the Subcommittee on Global Change Research (eds A. W. King, L. Dilling, G. P. Zimmerman, D. M. Fairman, R. A. Houghton, and co-editors). National Oceanic and Atmospheric Administration, National Climatic Data Center, Asheville, NC, USA, 242.
   Google Scholar
• Ciais, P., Reichstein, M., Viovy, N., Granier, A., Ogee, J. and co-authors. 2005. Europe-wide reduction in primary productivity caused by the heat and drought in 2003. Nature 437, 529-533. doi:10.1038/nature03972.
   Google Scholar
• Ciattaglia, L., Colombo, T. and Masarie, K. A. 1999. Continuous mea-surements of atmospheric CO2 at Jubany Station, Antarctica. Tellus 51B, 713–721.
   Google Scholar
• Ciattaglia, L., Rafanelli, C., Araujo, J. and Rodriguez, H. 2008. Long-term measurements of the atmospheric carbon dioxide concentra-tion measured at Jubany Station indicate a relationship with “El Nino”. Berichte zur Polar und Meeresforschung. AWI Bremerhaven, 571-2008, 390–396.
   Google Scholar
• Conway, T J., Lang, P. M. and Masarie, K. A. 2008. Atmospheric Car-bon Dioxide Dry Air Mole Fractions from the NOAA ESRL Carbon Cycle Cooperative Global Air Sampling Network, 1968-2007. Version: 2008-07-24, Path: ftp://ftp.cmdl.noaa.gov/ccg/co2/flask/event/.
   Google Scholar
• Davis, K. J., Bakwin, P. S., Yi, C., Berger, B. W., Zhao, C. and co-authors. 2003. The annual cycles of CO2 and H20 exchange over a northern mixed forest as observed from a very tall tower. Global Change Biol. 9, 1278-1293.
   Google Scholar
• Denman, K. L., Brasseur, G., Chidthaisong, A., Ciais, R, Cox, P.M. and co-authors. 2007. Couplings between changes in the climate system and biogeochemistry. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, and co-editors). Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 501-588.
   Google Scholar
• Denning, A. S., Fung, I. Y. and Randall, D. A. 1995. Latitudinal gradient of atmospheric CO2 due to seasonal exchange with land biota. Nature 376, 240–243.
   Web of Science ®Google Scholar
• Denning, A. S., Holzer, M., Gurney, K. R., Heimann, M., Law, R. M. and co-authors. 1999. Three-dimensional transport and concentration of 5F6-A model intercomparison study (TransCom 2). Tellus, 51B, 266-297.
   Google Scholar
• Dunn, A. L., Barford, C. C., Wofsy, S. C., Goulden, M. L. and Daube, B. C. 2006. A long-term record of carbon exchange in a boreal black spruce forest: means, responses to interannual variabil-ity, and decadal trends. Global Change Biol. 12, doi:10.1111/j.1365-2486.2006.01221.x.
   Google Scholar
• Engelen, R J., Denning, A. S., Gurney, K. R., Law, R. M., Rayner, P. J. and co-authors. 2002. On error estimation in atmo-spheric CO2 inversions. J. Geophys. Res. 107, 4635. doi:10.1029/2002JDO02195.
   Google Scholar
• Enting, I. G. 2002. Inverse Problems in Atmospheric Constituent Trans-port. Cambridge Univ. Press, Cambridge, UK, 392.
   Google Scholar
• Erickson, D.J., D, I., Mills, R. T., Gregg, J., Blasing, T. J., Hoffman, F. M. and co-authors. 2008. An estimate of monthly global emissions of anthropogenic CO2: Impact on the seasonal cycle of atmospheric CO2. J. Geophys. Res. 113, G01023. doi:10.1029/2007JG000435.
   Google Scholar
• Esalci, Y. 2009. Atmospheric CO2 Hourly Concentration Data, Mina-mitorishima, Ryori and Yonagunijima. World Data Center for Green-house Gases, Japan Meteorol. Agency, Tokyo. Version: 18 Mar 2008, Available at: http://gaw.kishou.go.jp/wdegg/wdegg.html.
   Google Scholar
• Fischer, M. 2005. Carbon Dioxide Flux Measurement Systems Hand-book. Atmospheric Radiation Measurement Tech Report: ARM-TR048.
   Google Scholar
• Fischer, M., Billesbach, D. P., Berry, J. A., Riley, W. J. and Torn, M. S. 2007. Spatiotemporal variations in growing season exchanges of CO2, H20, and sensible heat in agricultural fields of the Southern Great Plains. Lawrence Berkeley National Laboratory Professional Paper: LBNL-63014.
   Google Scholar
• Forster, P., Ramaswamy, V, Artaxo, P., Berntsen, T., Betts, R. and co-authors. 2007. Changes in atmospheric constituents and in radiative forcing. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, and co-editors).Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 131-234,
   Google Scholar
• Francey, R. J., Steele, L. P., Spencer, D. A., Langenfelds, R. L., Law, R. M. and co-authors. 2003. The CSIRO (Australia) measurement of greenhouse gases in the global atmosphere. In: Report of the II th WMO/IAEA Meeting of Experts on Carbon Dioxide Concentration and Related Tracer Measurement Techniques (eds S. Toni and S. Kazuto). World Meteorological Organization Global Atmosphere Watch, Tokyo, Japan, September 2001, 97-111.
   Google Scholar
• Friedbacher, E., Froehlich, M. and Spangl, W. 2007. Atmospheric CO2 hourly concentration data, Sonnblick. World Data Center for Green-house Gases, Japan Meteorol. Agency, Tokyo. Version: 18 Mar 2008, Available at: http://gaw.kishou.go.jp/wdegg.html.
   Google Scholar
• Gerbig, C., Lin, J. C., Wofsy, S. C., Daube, B. C., Andrews, A. E. and co-authors. 2003. Toward constraining regional-scale fluxes of CO2 with atmospheric observations over a continent: 2. Analysis of COBRA data using a receptor-oriented framework. J. Geophys. Res. 108, 4757. doi:10.1029/2003JD003770.
   Google Scholar
• Giglio, L., van der Werf, G. R., Randerson, J. T., Collatz, G. J. and Kasibhatla, P. S. 2006. Global estimation of burned area using MODIS active fire observations. Atmos. Chem. Phys. 6, 957–974.
   Web of Science ®Google Scholar
• GLOBALVIEW-CO2. 2007. Cooperative Atmospheric Data Integra-tion Project-Carbon Dioxide. CD-ROM, NOAA ESRL, Boulder, Colorado. [Also available on Internet via anonymous FTP to www.cmdl.noaa.gov, Path: /ccg/co2/GLOBALVIEW]
   Google Scholar
• Gomez-Pelaez, A. J., Ramos, R. and Perez-delaPuerta, J. 2006. Methane and carbon dioxide continuous measurements at Izana GAW station (Spain). In: GAW Report (No. 168) of the 13th WMO/IAEA Meeting of Experts on Carbon Dioxide and Related Tracer Measurement Techniques (ed.J. B. Miller). World Meteorological Organization, (TD No. 1359), Boulder, Colorado, USA, 19-22 September 2005 180-184.
   Google Scholar
• Gourdji, S. M., Mueller, K. L., Schaefer, K. and Michalak, A. M. 2008. Global monthly averaged CO2 fluxes recovered us-ing a geostatistical inverse modeling approach: 2. Results includ-ing auxiliary environmental data. J. Geophys. Res. 113, D21115. doi:10.1029/2007JD009733.
   Web of Science ®Google Scholar
• Gurney, K. R., Law, R., Rayner, P. and Denning, A. S. 2000. TransCom 3 Experimental Protocol. Paper 707, Department of Atmospheric Sci-ence, Colorado State University, USA.
   Google Scholar
• Gurney, K. R., Law, R. M., Denning, A. S., Rayner, P. J., Baker, D. and co-authors. 2002. Towards robust regional estimates of CO2 sources and sinks using atmospheric transport models. Nature 415, 626-630.
   Google Scholar
• Gurney, K. R., Law, R. M., Denning, A. S., Rayner, P. J., Pak, B. C. and co-authors. 2004. Transcom 3 inversion intercomparison: Model mean results for the estimation of seasonal carbon sources and sinks. Global Biogeochem. Cycles 18, GB1010. doi:10.1029/2003GB002111.
   Google Scholar
• Gurney, K. R., Chen, Y-H., Maki, T., Kawa, S. R., Andrews, A. and co-authors. 2005. Sensitivity of atmospheric CO2 inversions to seasonal and interannual variations in fossil fuel emissions. J. Geophys. Res. 110, D10308. doi:10.1029/2004JD005373.
   Google Scholar
• Gurney, K. R., Baker, D., Rayner, P. and Denning, S. 2008. Interannual variations in continental-scale net carbon exchange and sensitivity to observing networks estimated from atmospheric CO2 inversions for the period 1980 to 2005. Global Biogeochem. Cycles 22, GB3025. doi:10.1029/2007GB003082.
   Google Scholar
• Haszpra, L., Barcza, Z., Hidy, D., Szilágyi, I., Dlugokencky, E. and co-authors. 2008. Trends and temporal variations of major greenhouse gases at a rural site in Central Europe. Atmos. Environ. 42, 8707-8716. doi:10.1016/j.atmosenv.2008.09.012.
   Google Scholar
• Hatalcka, J., Aalto, T., Aaltonen, V., Aurela, M., Hakola, H. and co-authors. 2003. Overview of the atmospheric research activities and results at Pallas GAW station. Boreal Environ. Res. 8, 365-383.
   Google Scholar
• Higuchi, K., Worthy, D., Chan, D. and Shashkov, A. 2003. Regional source/sink impact on the diurnal, seasonal and inter-annual variations in atmospheric CO2 at a boreal forest site in Canada. Tellus 55B, 115–125.
   Google Scholar
• Hollinger, D. Y., Goltz, S. M., Davidson, E. A., Lee, J. T., Tu, K. and co-authors. 1999. Seasonal patterns and environmental control of carbon dioxide and water vapour exchange in an ecotonal boreal forest. Global Change Biol. 5, 891-902.
   Google Scholar
• Hurwitz, M. D., Ricciuto, D. M., Balcwin, P. S., Davis, K. J., Wang, W. and co-authors. 2004. Transport of carbon dioxide in the presence of storm systems over a northern Wisconsin forest. J. Atmos. Sci. 61, 607-618.
   Google Scholar
• Hutyra, L. R., Munger, J. W., Saleslca, S. R., Gottlieb, E., Daube, B. C. and co-authors. 2007. Seasonal controls on the exchange of carbon and water in an Amazonian rain forest. J. Geophys. Res. 112, G03008. doi:10.1029/2006JG000365.
   Google Scholar
• Jacobson, A. R., Milcaloff Fletcher, S. E., Gruber, N., Sarmiento, J. L. and Gloor, M. 2007a. A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 1. Methods and global-scale fluxes. Global Biogeochem. Cycles 21, GB1019. doi:10.1029/2005GB002556.
   Google Scholar
• Jacobson, A. R., Milcaloff Fletcher, S. E., Gruber, N., Sarmiento, J. L. and Gloor, M. 2007b. A joint atmosphere-ocean inversion for surface fluxes of carbon dioxide: 2. Regional results. Global Biogeochem. Cycles 21, GB1020. doi:10.1029/2006GB002703.
   Google Scholar
• Janssens, I. A., Freibauer, A., Ciais, P., Smith, R, Nabuurs, G.-J. and co-authors. 2003. Europe's terrestrial biosphere absorbs 7 to 12% of European anthropogenic CO2 emissions. Science 300, 1538-1542. doi:10.1126/science.1083592.
   Google Scholar
• Kaminski, T., Rayner, P. J., Heimann, M. and Enting, I. G. 2001. On aggregation errors in atmospheric transport inversions. J. Geophys. Res. 106(D5), 4703–4715.
   Web of Science ®Google Scholar
• Kawa, S. R., Erickson, D. J., D I, Pawson, S. and Zhu, Z. 2004. Global CO2 transport simulations using meteorological data from the NASA data assimilation system. J. Geophys. Res. 109, D18312. doi:10.1029/2004JD004554.
   Google Scholar
• Keeling, C. D., Whorf, T. P., Wahlen, M. and Van Der Pilcht, J. 1995. Internannual extremes in the rate of rise of atmospheric carbon dioxide since 1980. Nature 375, 666–670.
   Web of Science ®Google Scholar
• Keeling, R. F., Piper, S. C. and Heimann, M. 1996. Global and hemi-spheric CO2 sinks deduced from changes in atmospheric 02 concen-trations. Nature 381, 218–221.
   Web of Science ®Google Scholar
• Langenfelds, R. L., Francey, R. J., Pak, B. C., Steele, L. P., Lloyd, J. and co-authors. 2002. Interannual growth rate variations of atmo-spheric CO2 and its 313C, H2, CH4 and CO between 1992 and 1999 linked to biomass burning. Global Biogeochem. Cycles 16, 1048. doi:10.1029/2001GB001466.
   Google Scholar
• Lauvaux, T., Uliasz, M., Sarrat, C., Chevallier, F., Bousquet, P. and co-authors. 2008. Mesoscale inversion: First results from the CERES campaign with synthetic data. Atmos. Chem. Phys. 8, 3459-3471.
   Google Scholar
• Law, R. M., Rayner, P. J., Steele, L. P. and Enting, I. G. 2003. Data and modelling requirements for CO2 inversions using high-frequency data. Tellus 55B, 512–521.
   Google Scholar
• Law, R. M., Peters, W., Rödenbeck, C., Aulagnier, C., Baker, I. and co-authors. 2008. TransCom model simulations of hourly atmospheric CO2: Experimental overview and diurnal cycle results for 2002. Global Biogeochem. Cycles 22, GB3009. doi:10.1029/2007GB003050.
   Google Scholar
• Levinson, D. H. and Waple, A. M. 2004. State of the climate in 2003. Bull. Am. Meteorol. Soc. 85, S1–S72.
   Web of Science ®Google Scholar
• Li, Y.-F. 1996. Global Population distribution 1990: Terrestrial area and country name information on a one by one degree grid cell basis. ORM/ CDIAC-96, DB1016, Carbon Dioxide Inf. Anal. Cent., Oak Ridge, Tenn., USA.
   Google Scholar
• Marland, G., Boden, T. A. and Andres, R. J. 2007. Global, regional, and national fossil fuel CO2 emissions. In: Trends, A Compendium of Data on Global Change. Carbon Dioxide Inf. Anal. Cent., Oak Ridge Natl. Lab., U.S. Dep. of Energy, Oak Ridge, Tenn., USA.
   Google Scholar
• Masarie, K. A., Langenfelds, R. L., Allison, C. E., Conway, T. J., Dlugokencky, E. J. and co-authors. 2001. NOAA/CSIRO Flask Air Intercomparison Experiment: A strategy for directly assessing consis-tency among atmospheric measurements made by independent labo-ratories. J. Geophys. Res. 106(D17), 20445-20464.
   Google Scholar
• Matsueda, H., Machida, T., Sawa, Y., Nakagawa, Y., Hirotani, K. and co-authors. 2008. Evaluation of atmospheric CO2 measurements from new flask air sampling of JAL airliner observations. Meteorol. Geo-phys. 59, 1-17. doi:10.2467/mripapers.59.1.
   Google Scholar
• Mueller, K. L., Gourdji, S. M. and Michalak, A. M. 2008. Global monthly averaged CO2 fluxes using a geostatistical inverse modeling approach: 1. Results using atmospheric measurements. J. Geophys. Res. 113, D21114. doi:10.1029/2007JD009734.
   Web of Science ®Google Scholar
• Myneni, R B., Dong, J., Tucker, C. J., Kaufmann, R. K., Kauppi, P. E. and co-authors. 2001. A large carbon sink in the woody biomass of Northern forests. Proc. Natl. Acad. Sci. USA 98, 14784-14789. doi:10.1073/pnas.261555198.
   Google Scholar
• Nemani, R. R., Keeling, C.D., Hashimoto, H., Jolly, W. M., Piper, S. C. and co-authors. 2003. Climate-driven increases in global terrestrial net primary production from 1982 to 1999. Science 300, 1560-1563. doi:10.1126/science.1082750.
   Google Scholar
• Parazoo, N. C., Denning, A. S., Kawa, S. R., Corbin, K. D., Lokupi-tiya, R. S. and co-authors. 2008. Mechanisms for synoptic variations of atmospheric CO2 in North America, South America and Europe. Atmos. Chem. Phys. 8, 7239-7254.
   Google Scholar
• Patra, P. K., Law, R. M., Peters, W., Rödenbeck, C., Talcigawa, M. and co-authors. 2008. TransCom model simulations of hourly atmospheric CO2: Analysis of synoptic-scale variations for the period 2002-2003. Global Biogeochem. Cycles 22, GB4013. doi:10.1029/2007GB003081.
   Google Scholar
• Peters, W., Jacobson, A. R., Sweeney, C., Andrews, A. E., Conway, T. J. and co-authors. 2007. An atmospheric perspective on North American carbon dioxide exchange: CarbonTracker. Proc. Natl. Acad. Sci. USA 104, 18925-18930. doi:10.1073/pnas.0708986104.
   Google Scholar
• Peylin, P., Rayner, P. J., Bousquet, P., Carouge, C., Hourdin, F. and co-authors. 2005. Daily CO2 flux estimates over Europe from continuous atmospheric measurements: 1, inverse methodology. Atmos. Chem. Phys. 5, 3173-3186.
   Google Scholar
• Potter, C., Klooster, S., Steinbach, M., Tan, P., Kumar, V. and co-authors. 2003. Global teleconnections of climate to terrestrial carbon flux. J. Geophys. Res. 108, 4556. doi:10.1029/2002JDO02979.
   Google Scholar
• Potter, C., Klooster, S., Huete, A. and Genovese, V. 2007. Terres-trial carbon sinks for the United States predicted from MODIS satellite data and ecosystem modeling. Earth Interact. 11, 11–013. doi:10.1175/EI228.1.
   Web of Science ®Google Scholar
• Randerson, J. T., Thompson, M. V., Conway, T. J., Fung, I. Y. and Field, C. B. 1997. The contribution of terrestrial sources and sinks to trends in the seasonal cycle of atmospheric carbon dioxide. Global Biogeochem. Cycles 11, 535–560.
   Web of Science ®Google Scholar
• Rayner, P. J., Enting, I. G., Francey, R. J. and Langenfelds, R. 1999. Reconstructing the recent carbon cycle from atmospheric CO2, '3C and 02/N2 observations. Tellus 51B, 213-232.
   Google Scholar
• Rödenbeck, C., Houweling, S., Gloor. M. and Heimann, M. 2003a. CO2 flux history 1982-2001 inferred from atmospheric data using a global inversion of atmospheric transport. Atmos. Chem. Phys. 3, 1919–1964.
   Web of Science ®Google Scholar
• Rödenbeck, C., Houweling, S., Gloor, M. and Heimann, M. 2003b. Time-dependent atmospheric CO2 inversions based on interannually varying tracer transport. Tellus 55B, 488–497.
   Google Scholar
• Santaguida, R. 2008. Atmospheric CO2 hourly concentration data, Monte Cimone. World Data Center for Greenhouse Gases, Japan Meteorol. Agency, Tokyo. Version: 18 Mar 2008, Available at: http://gaw.kishou.go.jp/wdegg.html.
   Google Scholar
• Schuh, A. E., Denning, A. S., Uliasz, M. and Corbin, K. D. 2009. Seeing the forest for the trees: Recovering large-scale carbon flux biases in the midst of small-scale variability. J. Geophys. Res. 114, G03007. doi:10.1029/2008JG000842.
   Web of Science ®Google Scholar
• Takahashi, T., Sutherland, S. C., Sweeney, C., Poisson, A., Metzl, N. and co-authors. 2002. Global sea-air CO2 flux based on climatological surface ocean pCO2 and seasonal biological and temperature effects. Deep-Sea Res. 11 49, 1601-1622.
   Google Scholar
• Takahashi, T., Sutherland, S. C., Wanninlchof, R., Sweeney, C., Feely, R. A. and co-authors. 2009. Climatological mean and decadal change in surface ocean pCO2, and net sea-air CO2 flux over the global oceans. Deep-Sea Res. II 56, 554-577. doi:10.1016/j.dsr2.2008.12.009.
   Google Scholar
• Tans, P. P., Fung, I. Y. and Takahashi, T. 1990. Observational con-straints on the global atmospheric CO2 budget. Science 247, 1431–1438.
   PubMed Web of Science ®Google Scholar
• Tans, R, Zhao, C. and Masarie, K. 2003. Maintenance and propagation of the WMO Mole Fraction Scale for carbon dioxide in air. In: Report of the Eleventh WMO Meeting of Experts on Carbon Dioxide Concentration and Related Tracer Measurement Techniques (ed.S. Toni). World Meteorological Organization, Geneva, Tokyo, Japan, 25-28. September 2001.
   Google Scholar
• Tarantola, A. 2005. Inverse Problem Theory and Methods for Model Pa-rameter Estimation. Society for Industrial and Applied Mathematics, Philadelphia, PA, USA, 342.
   Google Scholar
• Thoning, K. W., Kitzis, D. R. and Crotwell, A. 2007. Atmospheric Carbon Dioxide Dry Air Mole Fractions from quasi-continuous measurements at Barrow, Alaska; Mauna Loa, Hawaii; American Samoa; and South Pole, 1973-2006. Version: 2007-10-01, Path: ftp://ftp.cmdl.noaa.gov/ccg/co2/in-situ/.
   Google Scholar
• Tsutsumi, Y., Mori, K., Ikegami, M., Tashiro, T. and Tsuboi, K. 2006. Long-term trends of greenhouse gases in regional and back-ground events observed during 1998-2004 at Yonagunijima located to the east of the Asia continent. Atmos. Environ. 40, 5868–5879. doi:10.1016/j.atmosenv.2006.04.036.
   Web of Science ®Google Scholar
• Uhse, K. 2006. Atmospheric CO2 hourly concentration data, Schauins-land, Zugspitze/Schneefemerhaus. World Data Center for Greenhouse Gases, Japan Meteorol. Agency, Tokyo. Version: 18 Mar 2008, Avail-able at: http://gaw.lcishou.go.jp/wdegg.html.
   Google Scholar
• Urbanski, S., Barford, C., Wofsy, S., Kucharilc, C., Pyle, E. and co-authors. 2007. Factors controlling CO2 exchange on timescales from hourly to decadal at Harvard Forest. J. Geophys. Res. 112, G02020. doi:10.1029/2006JG000293.
   Google Scholar
• van der Werf, G. R., Randerson, J. T., Giglio, L., Collatz, G. J., Kasibhatla, P. S. and co-authors. 2006. Interannual variability in global biomass burning emissions from 1997 to 2004. Atmos. Chem. Phys. 6, 3423-3441.
   Google Scholar
• Wang, J.-W., Denning, A. S., Lu, L., Baker, I. T., Corbin, K. D. and co-authors. 2007. Observations and simulations of synoptic, regional, and local variations in atmospheric CO2. J. Geophys. Res. 112, D04108. doi:10.1029/2006JDO07410.
   Google Scholar
• Waple, A. M., Lawrimore, J H., Alexander, L., Horton, B., Ambenje, P. and co-authors. 2003. State of the climate in 2002. Bull. Am. Meteorol. Soc. 84, S1-S68.
   Google Scholar
• Yi, C., Davis, K. J., Berger, B. W. and Balcwin, P. S. 2001. Long-term observations of the dynamics of the continental planetary boundary layer. J. Atmos. Sci. 58, 1288–1299.
   Web of Science ®Google Scholar
• Zhao, C. L., Tans, P. P. and Thoning, K. W. 1997. A high precision manometric system for absolute calibrations of CO2 in dry air. J. Geophys. Res. 102, 5885–5894.
   Web of Science ®Google Scholar
• Zhao, C. and Tans, P. P. 2006. Estimating uncertainty of the WMO mole fraction scale for carbon dioxide in air. J. Geophys. Res. 111, D08509. doi:10.1029/2005JD006003.
   Google Scholar