Friedlingsteinetal-JC06 - ClimateCarbon Cycle Feedback...

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Unformatted text preview: ClimateCarbon Cycle Feedback Analysis: Results from the C 4 MIP Model Intercomparison P. F RIEDLINGSTEIN , a P. C OX , b R. B ETTS , c L. B OPP , a W. VON B LOH , d V. B ROVKIN , d P. C ADULE , e S. D ONEY , f M. E BY , g I. F UNG , h G. B ALA , i J. J OHN , h C. J ONES , c F. J OOS , j T. K ATO , k M. K AWAMIYA , k W. K NORR , l K. L INDSAY , m H. D. M ATTHEWS , g,n T. R ADDATZ , o P. R AYNER , a C. R EICK , o E. R OECKNER , p K.-G. S CHNITZLER , p R. S CHNUR , p K. S TRASSMANN , j A. J. W EAVER , g C. Y OSHIKAWA , k AND N. Z ENG q a IPSL/LSCE, Gif-sur-Yvette, France b Centre for Ecology and Hydrology, Dorchester, United Kingdom c Hadley Centre, Met Office, Exeter, United Kingdom d Potsdam Institute for Climate Impact Research, Potsdam, Germany e CNRS/IPSL, Paris, France f Woods Hole Oceanographic Institution, Woods Hole, Massachusetts g University of Victoria, Victoria, British Columbia, Canada h University of California, Berkeley, Berkeley, California i Lawrence Livermore National Laboratory, Livermore, California j University of Bern, Bern, Switzerland k Frontier Research Center for Global Change/JAMSTEC, Yokohama, Japan l QUEST, University of Bristol, Bristol, United Kingdom m NCAR, Boulder, Colorado n University of Calgary, Calgary, Alberta, Canada o Max Planck Institute for Biogeochemistry, Jena, Germany p Max Planck Institute for Meteorology, Hamburg, Germany q University of Maryland, College Park, College Park, Maryland (Manuscript received 1 July 2005, in final form 10 November 2005) ABSTRACT Eleven coupled climatecarbon 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 Intergovern- mental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) A2 anthropogenic emissions of CO 2 for the 18502100 time period. For each model, two simulations were performed in order to isolate the impact of climate change on the land and ocean carbon cycle, and therefore the climate feedback on the atmospheric CO 2 concentration growth rate. There was unanimous agreement among the models that future climate change will reduce the efficiency of the earth system to absorb the anthropogenic carbon perturbation. A larger fraction of anthropogenic CO 2 will stay airborne if climate change is ac- counted for. By the end of the twenty-first century, this additional CO 2 varied between 20 and 200 ppm for the two extreme models, the majority of the models lying between 50 and 100 ppm. The higher CO 2 levels led to an additional climate warming ranging between 0.1 and 1.5C. All models simulated a negative sensitivity for both the land and the ocean carbon cycle to future climate....
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This note was uploaded on 11/07/2011 for the course EAS 8803 taught by Professor Staff during the Spring '08 term at Georgia Institute of Technology.

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Friedlingsteinetal-JC06 - ClimateCarbon Cycle Feedback...

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