A43G:
Quantifying and Reducing the Uncertainties in the Global and Regional Aerosol Forcing of Climate I


Submit an Abstract to this Session


Session ID#: 60793

Session Description:
Uncertainties in aerosol radiative forcing constitute a principal barrier in our quantitative understanding of the global and regional climate system. Large uncertainty in the radiative forcing of anthropogenic aerosols persists despite significant developments in model complexity, increases in global observations and advances in our knowledge of aerosol-related physical, chemical, and dynamical processes. The scope of the session includes: aerosol-related causes of uncertainty, methodologies to reduce the uncertainty in forcings, process-based evaluations, constraints on model simulations using observations of aerosols, clouds and radiation, insights into microphysics-chemistry-optics-radiation linkages, and improved understanding of the forcing influences on atmospheric circulation including effects on the hydrological cycle. Novel ways of model analysis, synthesis of model and observation data to quantify and narrow the uncertainties, and advances in the significance of the global-to-regional-to-smaller scale forcing and phenomena with implications for the reduction of uncertainties, would be instructive.
Primary Convener:  Ken S Carslaw, University of Leeds, Leeds, United Kingdom
Conveners:  J F Lamarque, National Center for Atmospheric Research, Boulder, CO, United States, V Ramaswamy, NOAA/OAR/ GFDL, Princeton, United States and Massimo A Bollasina, University of Edinburgh, Edinburgh, United Kingdom
Primary Liaisons:  Ken S Carslaw, University of Leeds, Leeds, United Kingdom and V Ramaswamy, NOAA/OAR/ GFDL, Princeton, United States
Chairs:  V Ramaswamy, NOAA/OAR/ GFDL, Princeton, United States, Ken S Carslaw, University of Leeds, Leeds, United Kingdom, J F Lamarque, National Center for Atmospheric Research, Boulder, CO, United States and Massimo A Bollasina, University of Edinburgh, Edinburgh, United Kingdom
OSPA Liaison:  Ken S Carslaw, University of Leeds, Leeds, United Kingdom
Co-Organized with:
Atmospheric Sciences, and Global Environmental Change

Proposed Co-Organized Session with:
  • GC - Global Environmental Change
Index Terms:

0305 Aerosols and particles [ATMOSPHERIC COMPOSITION AND STRUCTURE]
3311 Clouds and aerosols [ATMOSPHERIC PROCESSES]
3337 Global climate models [ATMOSPHERIC PROCESSES]
3359 Radiative processes [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Historical evolution of climate, air quality, and aerosol effective radiative forcing in GFDL’s CM4 and ESM4 coupled models (450378)
Larry Wayne Horowitz1, John P Dunne2, Paul A Ginoux3, Dr. Vaishali Naik4, Fabien Paulot5,6, Elena Shevliakova7, Alistair Adcroft1,8, Huan Guo9, Robert Hallberg1, Isaac Held10, Jasmin G John11, John P Krasting12, Sergey Malyshev3, Charles A Stock1, Michael Winton13, Niki Zadeh9 and Ming Zhao14, (1)NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States, (2)NOAA Geophys Fluid Dynamic, Princeton, United States, (3)NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (4)NOAA/ Geophysical Fluid Dynamics Laboratory, Princeton, United States, (5)Princeton University, Princeton, NJ, United States, (6)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States, (7)NOAA/NWS/NCEP/EMC, College Park, United States, (8)Program for Atmospheric and Oceanic Sciences, Princeton University, Princeton, United States, (9)NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, United States, (10)NOAA, Geophysical Fluid Dynamics Lboratory, Princeton, NJ, United States, (11)NOAA/GFDL, Princeton, United States, (12)Geophysical Fluid Dynamics Laboratory, Princeton, United States, (13)NOAA Geophys Fluid Dynamic, Princeton, NJ, United States, (14)NOAA/OAR/Geophysical Fluid Dynamics Laboratory, Princeton, United States
Radiative Forcing and Rapid Adjustments in Black Carbon and Sulfate Aerosol Experiments: the PDRMIP Multi-Model Intercomparison and Beyond (Invited) (350919)
Christopher James Smith, Met Office Hadley center for Climate Change, School of Earth and Environment, Exeter, United Kingdom, Ryan J. Kramer, University of Miami, Miami, United States, Gunnar Myhre, CICERO Center for International Climate Research, Oslo, Norway, Piers Forster, University of Leeds, Priestley International Centre for Climate, Leeds, LS2, United Kingdom, Brian Soden, University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Miami, United States, Johannes Mulmenstadt, Institute for Meteorology, Universität Leipzig, Leipzig, Germany, Timothy Andrews, Met Office Hadley Centre, Exeter, United Kingdom, Duncan Watson-Parris, University of Oxford, Oxford, United Kingdom and PDRMIP Modelling Team
How uncertain are simulations of aerosol radiative forcing in a model constrained by extensive aerosol measurements? (406809)
Jill S Johnson1, Leighton Regayre1, Kirsty Pringle1, Masaru Yoshioka1, David Sexton2, John W Rostron2 and Ken S Carslaw1, (1)University of Leeds, Leeds, United Kingdom, (2)Met Office, Hadley Centre for Climate Science and Services, Exeter, United Kingdom
Observationally-constrained aerosol-cloud semi-direct effect in multiple GCMs (395849)
Anahita Amiri-Farahani1, Taufiq Hassan2 and Robert Allen2, (1)University of Michigan Ann Arbor, Department of Climate and Space Sciences and Engineering, Ann Arbor, MI, United States, (2)University of California Riverside, Riverside, CA, United States
Reducing uncertainty in the detection of anthropogenic aerosol forcing (369001)
Laurie L Trenary, George Mason University Fairfax, Atmospheric, Oceanic, and Earth Sciences, Fairfax, VA, United States, Timothy M DelSole, George Mason University Fairfax, Fairfax, VA, United States, Michael K Tippett, Columbia University of New York, Palisades, NY, United States and Xiaoqin Yan, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Seasonal Variation of Refractory Black Carbon Loadings over the Remote Atlantic Observed During the Atmospheric Tomography (ATom) Mission (394386)
Joseph M Katich, NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States, Dr. Joshua Peter Schwarz, PhD, NOAA, Chemical Sciences Laboratory, Boulder, United States and The Atmospheric Tomography Team
Using Native Error Diagnostics to Identify Sources of Aerosol Radiative Forcing Error in GCMs and Understand Their Implications (421671)
Daniel Feldman, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, David Paynter, NOAA/ Geophysical Fluid Dynamics Laboratory, Princeton, United States, Alexandra L Jones, University of Illinois, Atmospheric Sciences, Urbana, IL, United States, Stuart Freidenreich, Geophysical Fluid Dynamics Laboratory, Princeton, United States, William Drew Collins, Berkeley Lab and UC Berkeley, Berkeley, United States and V Ramaswamy, NOAA/OAR/ GFDL, Princeton, United States
Quantifying uncertainty in aerosol light absorption due to unresolved variability in particle physical and chemical properties (447704)
Laura Fierce, Brookhaven National Laboratory, Environmental & Climate Sciences, Upton, NY, United States, Timothy Bruce Onasch, Aerodyne Research, Inc., Billerica, MA, United States, Claudio Mazzoleni, Michigan Technological University, Physics, Houghton, MI, United States and Christopher D Cappa, University of California, Department of Civil and Environmental Engineering, Davis, United States

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