Now showing items 1-10 of 10

    • Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks : results from an atmosphere-ocean general circulation model 

      Thornton, Peter E.; Doney, Scott C.; Lindsay, Keith; Moore, J. Keith; Mahowald, Natalie M.; Randerson, James T.; Fung, Inez Y.; Lamarque, J.-F.; Feddema, J. J.; Lee, Y.-H. (Copernicus Publications on behalf of the European Geosciences Union, 2009-10-08)
      Inclusion of fundamental ecological interactions between carbon and nitrogen cycles in the land component of an atmosphere-ocean general circulation model (AOGCM) leads to decreased carbon uptake associated with CO2 ...
    • Climate-mediated changes to mixed-layer properties in the Southern Ocean : assessing the phytoplankton response 

      Boyd, Philip W.; Doney, Scott C.; Strzepek, R.; Dusenberry, Jeffrey A.; Lindsay, Keith; Fung, Inez Y. (Copernicus Publications on behalf of the European Geosciences Union, 2008-05-19)
      Concurrent changes in ocean chemical and physical properties influence phytoplankton dynamics via alterations in carbonate chemistry, nutrient and trace metal inventories and upper ocean light environment. Using a fully ...
    • Climate–carbon cycle feedback analysis : results from the C4MIP model intercomparison 

      Friedlingstein, Pierre; Cox, P.; Betts, R.; Bopp, Laurent; von Bloh, W.; Brovkin, V.; Cadule, P.; Doney, Scott C.; Eby, Michael; Fung, Inez Y.; Bala, G.; John, Jasmin G.; Jones, C. D.; Joos, Fortunat; Kato, T.; Kawamiya, M.; Knorr, W.; Lindsay, Keith; Matthews, H. D.; Raddatz, T.; Rayner, Peter; Reick, C.; Roeckner, E.; Schnitzler, K.-G.; Schnur, R.; Strassmann, K.; Weaver, Andrew J.; Yoshikawa, C.; Zeng, Ning (American Meteorological Society, 2006-07-15)
      Eleven coupled climate–carbon cycle models used a common protocol to study the coupling between climate change and the carbon cycle. The models were forced by historical emissions and the Intergovernmental Panel on Climate ...
    • Evolution of carbon sinks in a changing climate 

      Fung, Inez Y.; Doney, Scott C.; Lindsay, Keith; John, Jasmin G. (2005-06-13)
      Climate change is expected to influence the capacities of the land and oceans to act as repositories for anthropogenic CO2 and hence provide a feedback to climate change. A series of experiments with the National Center ...
    • Extending the record of photosynthetic activity in the eastern United States into the presatellite period using surface diurnal temperature range 

      Bonfils, Celine; Angert, Alon; Henning, Cara C.; Biraud, Sebastien; Doney, Scott C.; Fung, Inez Y. (American Geophysical Union, 2005-04-26)
      In this study, we demonstrate that mid-latitude surface measurements of diurnal temperature range (DTR) can be used to reconstruct decadal variability of regional-scale terrestrial photosynthetic activity 1) during and ...
    • Impact of ocean carbon system variability on the detection of temporal increases in anthropogenic CO2 

      Levine, Naomi M.; Doney, Scott C.; Wanninkhof, Rik; Lindsay, Keith; Fung, Inez Y. (American Geophysical Union, 2008-03-19)
      Estimates of temporal trends in oceanic anthropogenic carbon dioxide (CO2) rely on the ability of empirical methods to remove the large natural variability of the ocean carbon system. A coupled carbon-climate model is used ...
    • Natural variability in a stable, 1000-yr global coupled climate-carbon cycle simulation 

      Doney, Scott C.; Lindsay, Keith; Fung, Inez Y.; John, Jasmin G. (American Meteorological Society, 2006-07-01)
      A new 3D global coupled carbon–climate model is presented in the framework of the Community Climate System Model (CSM-1.4). The biogeochemical module includes explicit land water–carbon coupling, dynamic carbon allocation ...
    • On the detection of summertime terrestrial photosynthetic variability from its atmospheric signature 

      Bonfils, Celine; Fung, Inez Y.; Doney, Scott C.; John, Jasmin G. (American Geophysical Union, 2004-05-11)
      We identify the climatic signatures of the summertime terrestrial photosynthesis variability using a long simulation of pre-industrial climate performed with the NCAR coupled global climate-carbon model. Since plant ...
    • Precision requirements for space-based XCO2 data 

      Miller, C. E.; Crisp, D.; DeCola, P. L.; Olsen, S. C.; Randerson, James T.; Michalak, Anna M.; Alkhaled, A.; Rayner, Peter; Jacob, Daniel J.; Suntharalingam, P.; Jones, D. B. A.; Denning, A. S.; Nicholls, M. E.; Doney, Scott C.; Pawson, S.; Boesch, H.; Connor, B. J.; Fung, Inez Y.; O'Brien, D.; Salawitch, R. J.; Sander, S. P.; Sen, B.; Tans, Pieter P.; Toon, G. C.; Wennberg, Paul O.; Wofsy, Steven C.; Yung, Y. L.; Law, R. M. (American Geophysical Union, 2007-05-26)
      Precision requirements are determined for space-based column-averaged CO2 dry air mole fraction (XCO2) data. These requirements result from an assessment of spatial and temporal gradients in XCO2, the relationship between ...
    • Wintertime phytoplankton bloom in the subarctic Pacific supported by continental margin iron 

      Lam, Phoebe J.; Bishop, James K. B.; Henning, Cara C.; Marcus, Matthew A.; Waychunas, Glenn A.; Fung, Inez Y. (American Geophysical Union, 2006-02-01)
      Heightened biological activity was observed in February 1996 in the high-nutrient low-chlorophyll (HNLC) subarctic North Pacific Ocean, a region that is thought to be iron-limited. Here we provide evidence supporting the ...