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Evaluation of terrestrial carbon cycle models through simulations of the seasonal cycle of atmospheric CO2: First results of a model intercomparison study

By Martin Heimann, Gerd Esser, A. Haxeltine, Jörg Kaduk, David W. Kicklighter, W. Knorr, Gundolf H. Kohlmaier, A. David McGuire, Jerry M. Melillo, Berrien Moore III, R. D. Otto, I. Colin Prentice, Walter Sauf, Annette L. Schloss, Stephen Sitch, Uwe Wittenberg and Gudrun Würth


Results of an intercomparison among terrestrial biogeochemical models (TBMs) are reported, in which one diagnostic and five prognostic models have been run with the same long-term climate forcing. Monthly fields of net ecosystem production (NEP), which is the difference between net primary production (NPP) and heterotrophic respiration RH, at 0.5° resolution have been generated for the terrestrial biosphere. The monthly estimates of NEP in conjunction with seasonal CO2 flux fields generated by the seasonal Hamburg Model of the Oceanic Carbon Cycle (HAMOCC3) and fossil fuel source fields were subsequently coupled to the three-dimensional atmospheric tracer transport model TM2 forced by observed winds. The resulting simulated seasonal signal of the atmospheric CO2 concentration extracted at the grid cells corresponding to the locations of 27 background monitoring stations of the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory network is compared with measurements from these sites. The Simple Diagnostic Biosphere Model (SDBM1), which is tuned to the atmospheric CO2 concentration at five monitoring stations in the northern hemisphere, successfully reproduced the seasonal signal of CO2 at the other monitoring stations. The SDBM1 simulations confirm that the north-south gradient in the amplitude of the atmospheric CO2 signal results from the greater northern hemisphere land area and the more pronounced seasonality of radiation and temperature in higher latitudes. In southern latitudes, ocean-atmosphere gas exchange plays an important role in determining the seasonal signal of CO2. Most of the five prognostic models (i.e., models driven by climatic inputs) included in the intercomparison predict in the northern hemisphere a reasonably accurate seasonal cycle in terms of amplitude and, to some extent, also with respect to phase. In the tropics, however, the prognostic models generally tend to overpredict the net seasonal exchanges and stronger seasonal cycles than indicated by the diagnostic model and by observations. The differences from the observed seasonal signal of CO2 may be caused by shortcomings in the phenology algorithms of the prognostic models or by not properly considering the effects of land use and vegetation fires on CO2 fluxes between the atmosphere and terrestrial biosphere

Publisher: American Geophysical Union (AGU)
Year: 1998
DOI identifier: 10.1029/97GB01936
OAI identifier:

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  4. (1992). A global biome model based on plant physiology and dominance, soil properties and climate, doi
  5. (1996). A global model of changing N20 emissions from natural and perturbed soils, doi
  6. (1995). A global primary productivity and phytogeography model, doi
  7. (1996). A prognostic phenology scheme for global models of the terrestrial biosphere, doi
  8. (1989). A three dimensional model of atmospheric CO 2 transport based on observed winds, 1, Analysis of observational data. doi
  9. (1989). A three dimensional model of atmospheric CO 2 transport based on observed winds, 3, Seasonal cycle and synoptic time scale variations, doi
  10. (1992). Aggregating fine-scale ecological knowledge to model coarser-scale attributes of ecosystems, doi
  11. (1986). Air-sea gas exchange rates: Introducton and synthesis, doi
  12. (1997). An Introduction to Environmental Biophysics, doi
  13. (1987). Application of advanced very high resolution radiometer vegetation index to study atmosphere-biosphere xchange of CO2, doi
  14. (1994). Atmospheric CO 2 from sites in the NOAA/CMDL air sampling network, doi
  15. (1994). CARAIB: A global model of terrestrial biological productivity, doi
  16. (1989). Continental scale models of water balance and fluvial transport: An application to South America, doi
  17. (1992). Coupled photosynthesis-stomatal conductance model for leaves of C 4 plants, doi
  18. (1992). Data Cent.,
  19. (1989). Date of budburst of fifteen tree species in Britain following climate warming, doi
  20. (1997). Equilibrium responses of global net primary production and carbon storage to doubled atmospheric arbon dioxide: Sensitivity to changes in vegetation nitrogen concentration, doi
  21. (1995). Equilibrium responses of soil carbon to climate change: Empirical and processbased estimates, doi
  22. (1987). Estimates of the seasonal variation in fossil fuel doi
  23. (1963). Estimating evapotranspiration fr m solar adiation,
  24. (1995). Forest sector impacts from changes in forest productivity under climate change, doi
  25. (1993). Geochemical cycles in an ocean general circulation model: Preindustrial tracer distributions, doi
  26. (1995). Global change and its effects on soil organic carbon stocks,
  27. (1993). Global change and terrestrial net primary production, doi
  28. (1981). Global climate change transport equation, doi
  29. (1996). Global net carbon exchange and intra-annual atmospheric CO 2 concentrations predicted by an ecosystem process model and three-dimensional atmospheric transport model, doi
  30. Global Systems Group, Department of Ecology University of Lund, S61vegatan 37, S-223 62 Lund, Sweden. (e-mail:;
  31. (1994). Global terrestrial net primary productivity,
  32. (1995). Impact of drought stress and other factors on seasonal land biosphere CO 2 exchange studied through an atmospheric tracer transport model, doi
  33. (1957). Instructions and Tables for Computing Potential Evapotranspiration and the Water Balance,
  34. (1995). Interannual extremes in the growth of atmospheric CO2, doi
  35. (1995). Long-term observations of atmospheric CO:• and carbon isotopes at continental sites in Germany, doi
  36. (1989). Model of the seasonal nd perennial carbon dynamics indeciduous-type forests controlled by climatic variables, doi
  37. (1994). Nelson, Estimates of CO2 emissions from fossil fuel burning and cement
  38. (1994). Net primary productivity n the terrestrial biosphere: The application of a global model, doi
  39. (1994). On the temperature dependence of soil respiration, doi
  40. (1995). PGEN: An integrated model of leaf photosynthesis, transpiration, and conductance, doi
  41. (1980). Physiological Plant Ecology, doi
  42. (1983). Predicting effects of vegetation changes on transpiration and evaporation. doi
  43. (1993). Relationships between CO 2 evolution, moisture content, and temperature for a range of soil types, in The Global Carbon Cycle and Its Pertubation by Man and Climate, Rep. EPOCCT90-0017 (MNLA),
  44. (1995). Responses in NPP and carbon stores of the northern biomes to a CO2-induced climatic change, as evaluated by the Frankfurt Biosphere Model (FBM), doi
  45. (1996). Selection of baseline conditions in a 3D atmospheric transport model: application to the seasonal and synoptic variations
  46. (1996). Sensitivity of the seasonal cycle of CO 2 at remote monitoring stations with respect to seasonal surface xchange fluxes determined with the adjoint of an atmospheric t ansport model, doi
  47. (1987). Sensitivity ofglobal carbon pools and fluxes to human and potential climate impacts, doi
  48. (1996). Simulation der Kohlenstoffdynamik der globalen Landbiosph'are mit SILVAN - Modellbeschreibung und Ergebnisse,
  49. (1989). Spatial and temporal variation of the gas exchange coefficient for CO 2, 1, Data analysis and global validation,
  50. (1993). Structure of a global carbon exchange model for the terrestrial biosphere: The Frankfurt Biosphere Model (FBM), doi
  51. (1993). Terrestrial ecosystem production: A process model based on global satellite and surface data, doi
  52. (1995). Terrestrial ecosystems and the carbon cycle, doi
  53. (1989). The continental European Suess-effect,
  54. (1997). The Frankfurt Biosphere Model: A global process oriented model for the seasonal and longterm CO 2 exchange between terrestrial ecosystems and the atmosphere, 2, Global results for potential vegetation in an assumed equilibrium state, doi
  55. (1993). the Hamburg LSG OGCM and its sensitivity to the thermohaline surface
  56. (1991). The IIASA database for mean monthly values of temperature, precipitation, and cloudiness on a global terrestrial grid,
  57. (1994). The role of deep roots in the hydrological and carbon cycles of Amazonian forests and pastures, doi
  58. (1995). The TM2 tracer model, model description and user manual,
  59. (1996). The use of satellitedetected NDVI data for the validation of global vegetation phenology models and application to the Frankfurt Biosphere Model, doi
  60. (1983). Three-dimensional tracer model study of atmospheric CO2: Response to seasonal exchanges with the terrestrial biosphere, doi
  61. (1982). Transpirational supply and demand: Plant, soil and atmospheric effects evaluated by simulation, doi
  62. (1953). Uber den Lichtfaktor und den Pflanzengesellschaften und seine Bedeutung ftir die Stoffproduktion,
  63. (1992). V6r6smarty, Interactions between carbon and nitrogen dynamics in estimating net primary productivity for potential vegetation in North America, doi
  64. (1991). V6r6smarty, Potential net primary productivity in South America: Application of a global model, doi
  65. (1993). V6r6smarty, Productivity response of climax temperate forests to elevated temperature and carbon dioxide: A North American comparison between two global models, doi
  66. (1996). Variations in modeled atmospheric transport of carbon dioxide and the consequences for CO:• inversions, doi
  67. (1995). Vegetation/ecosystem odeling and analysis project: Comparing biogeography and biogeochemistry models in a study of terrestrial ecosystem responses toclimate change and CO2 doubling, doi
  68. (1993). Zur saisonalen Variabilitfit des ozeanischen Kohlendioxidpartialdrucks,

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