B026
Carbon feedbacks in Earth’s climate system: beyond emergent patterns and towards mechanistic processes to reduce future ocean and land uncertainties

Session ID#: 82410

Session Description:
Our understanding of carbon cycle processes has advanced, but they remain a critical source of uncertainty in climate predictions.   This is due in part to complex biogeochemical and physical processes that control surface fluxes of CO2 and CH4 that are sensitive to global change. Such poorly constrained carbon cycle processes and their sensitivities to global change have led to large uncertainties in predicting the fate of massive amounts of carbon in land and ocean reservoirs.  However, an ever-expanding global carbon observation network allows carbon cycle processes to be resolved at unprecedented scales, especially in regional hot spots of large interannual variability. Of special interest to our session are current analyses or experiments contributing to the 6th Coupled Model Intercomparison Project.  We welcome submissions from the ocean, land, and atmospheric communities that bring together observations and simulations to provide new insights on carbon fluxes and turnover times to constrain climate-carbon feedbacks.  
Index Terms:

0428 Carbon cycling [BIOGEOSCIENCES]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4215 Climate and interannual variability [OCEANOGRAPHY: GENERAL]

Primary Convener:  Ashley Ballantyne, University of Montana, Missoula, MT, United States and Abhishek Chatterjee
Convener:  Abhishek Chatterjee, NASA Goddard Space Flight Center, GMAO, Greenbelt, MD, United States; USRA, Greenbelt, MD, United States and Abhishek Chatterjee
Primary Liaison:  Benjamin Poulter, NASA GSFC, Biospheric Science, Greenbelt, MD, United States and Abhishek Chatterjee
 
Divergent Estimates of Carbon Flux Sensitivities Explained by Soil Moisture – Temperature Feedbacks (Invited) (486291)
Vincent Humphrey, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland and Sonia I Seneviratne, ETH, Zurich, Switzerland
 
Internal variability and multi-year predictions of the ocean carbon sink (Invited) (486718)
Hongmei Li, Tatiana Ilyina, Wolfgang A. Müller and Peter Landschuetzer, Max Planck Institute for Meteorology, Hamburg, Germany
 
Reconciling carbon exchange efficiency from ecosystem to global scales (496853)
Ashley Ballantyne1, Zhihua Liu1, Benjamin Poulter2, William Anderegg3 and Philippe Ciais4, (1)University of Montana, Missoula, MT, United States, (2)NASA GSFC, Biospheric Science, Greenbelt, MD, United States, (3)University of Utah, School of Biological Sciences, Salt Lake City, UT, United States, (4)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France
 
Constraining Remineralization of Sinking Organic Carbon in the Oligotrophic Ocean: A Case Study from the Gulf of Aqaba (511413)
Stephanie Kienast, Dalhousie University, Halifax, NS, Canada, Adi Torfstein, Hebrew University of Jerusalem, Institute of Earth Sciences, Jerusalem, Israel and Lachlan Riehl, Dalhousie University, Halifax, Canada
 
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification (513592)
Xin Lin, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Gretchen Keppel-Aleks, University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, Brendan M Rogers, Woods Hole Science Center Falmouth, Falmouth, MA, United States, Colm Sweeney, NOAA ESRL, Global Monitoring Division, Boulder, CO, United States, Mikhail Arshinov, Russian Academy of Sciences, V. E. Zuev Institute of Atmospheric Optics, Tomsk, Russia, Edward J Dlugokencky, NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, Toshinobu Machida, Natl Inst Environal Studies, Tsukuba, Japan, Motoki Sasakawa, NIES, Tsukuba, Japan and Pieter P Tans, NOAA, ESRL/GMD, Boulder, CO, United States
 
Importance of Coccolithophores in the Ocean Deep Biomass (547514)
Amos Winter, Indiana State University, Earth and Environmental Systems, Terre Haute, IN, United States, Manfredi Manizza, Univ of California--SIO, Geosciences Research Division, La Jolla, CA, United States, Josue Gabriel Millan, Indiana State University, Earth and Envinmental Systems, Terre Haute, IN, United States, Diana Ruiz-Pino, Sorbonne Université, Paris, France, Luc Beaufort, Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France and Ian Probert, Station Biologique de Roscoff, Roscoff, France
 
Convergence of Long-term Sensitivity of Terrestrial Ecosystem Turnover Times to Temperature (555791)
Naixin Fan1, Nuno Carvalhais2, Sujan Koirala2, Miguel D Mahecha2 and Markus Reichstein2, (1)Max Planck Institute for Biogeochemistry, Jena, Germany, (2)Max Planck Institute for Biogeochemistry, Department of Biogeochemical Integration, Jena, Germany
 
Quantification of the Uptake of Anthropogenic Emissions of Atmospheric CO2 (606637)
Brian Francis Bennett1, Ross J Salawitch2, Laura McBride3 and Walter Robert Tribett1, (1)University of Maryland College Park, Department of Atmospheric and Oceanic Science, College Park, MD, United States, (2)University of Maryland, College Park, MD, United States, (3)University of Maryland College Park, Department of Chemistry and Biochemistry, College Park, MD, United States
 
Carbon isotopes reveal carbon cycling of montane ecosystem soils (Rocky Mountains, Colorado) (615972)
Markus Bill1, Mark E Conrad2, Patrick Sorensen3, Nicholas Bouskill2, Eoin Brodie3, Xiaoqin Wu1, Romy Chakraborty4 and Kenneth Hurst Williams5, (1)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (2)Lawrence Berkeley National Lab, Berkeley, CA, United States, (3)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences, Berkeley, CA, United States, (4)Lawrence Berkeley Nat'l Lab, Berkeley, CA, United States, (5)Colorado School of Mines, Golden, CO, United States
 
Diagnosing Climate–Carbon Cycle Feedbacks Constrained by ILAMB (628731)
Forrest M. Hoffman1, Nathan Collier1, Mingquan Mu2, Min Xu3, Cheng-En Yang4, Gretchen Keppel-Aleks5, David M Lawrence6, Charles Koven7, William J Riley7 and James Tremper Randerson8, (1)Oak Ridge National Laboratory, Computational Earth Sciences, Oak Ridge, TN, United States, (2)3317 Croul Hall, Irvine, CA, United States, (3)Oak Ridge National Laboratory, Computational Sciences and Engineering Division and Climate Change Science Institute, Oak Ridge, TN, United States, (4)University of Tennessee, Civil and Environmental Engineering, Knoxville, TN, United States, (5)University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (6)National Center for Atmospheric Research, Boulder, CO, United States, (7)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (8)University of California Irvine, Department of Earth System Science, Irvine, CA, United States
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