A12C:
Cloud–Aerosol–Radiation–Climate Interactions in the Southeastern Atlantic I


Submit an Abstract to this Session


Session ID#: 58242

Session Description:
Interactions between absorbing aerosol over and near clouds via radiative transfer, direct microphysical contact, or thermodynamic and dynamical processes impact climate. These cloud-aerosol-radiation-climate interactions are prevalent over the southeastern Atlantic, where large planetary low cloud decks, overlaid by biomass burning aerosol layers, occur. These reflective clouds help set the regional large-scale circulation. Smoke above clouds absorbs shortwave radiation and can produce a direct radiative warming when underlain by bright low clouds. The clouds are susceptible to atmospheric aerosol by changes in atmospheric stability and free-tropospheric moisture, and microphysical interactions. Both the low cloud deck and the smoke layer are challenging to measure and simulate at all scales, constituting a major uncertainty in understanding key processes and regional climate. Studies focused on all aspects of observation (in situ and remote sensing) and modeling of interactions between clouds, aerosol, radiation, precipitation, and climate over the southeastern Atlantic are solicited.
Primary Convener:  Samuel E LeBlanc, NASA Ames Research Center, Moffett Field, United States; Bay Area Environmental Research Institute, Moffett Field, United States
Conveners:  Greg M McFarquhar, Cooperative Institute for Severe and High-Impact Weather Research and Operations, University of Oklahoma, Norman, United States, Jennifer D. Small Griswold, University of Hawaii at Manoa, Atmospheric Sciences, Honolulu, HI, United States and Marc Mallet, CNRM / Meteo-France, Toulouse, France
Primary Liaison:  Samuel E LeBlanc, NASA Ames Research Center, Moffett Field, United States; Bay Area Environmental Research Institute, Moffett Field, United States
Chairs:  Samuel E LeBlanc, University of Colorado at Boulder, Boulder, CO, United States, Jennifer D. Small Griswold, University of Hawaii at Manoa, Atmospheric Sciences, Honolulu, HI, United States and Greg M McFarquhar, Cooperative Institute for Severe and High-Impact Weather Research and Operations, University of Oklahoma, Norman, United States
OSPA Liaison:  Samuel E LeBlanc, University of Colorado at Boulder, Boulder, CO, United States
Index Terms:

0321 Cloud/radiation interaction [ATMOSPHERIC COMPOSITION AND STRUCTURE]
3311 Clouds and aerosols [ATMOSPHERIC PROCESSES]
3355 Regional modeling [ATMOSPHERIC PROCESSES]
3360 Remote sensing [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Aerosol-radiation-cloud interactions in the South-East Atlantic: an overview of results from three years of ORACLES-deployments (Invited) (399577)
Jens Redemann, University of Oklahoma, School of Meteorology, Norman, United States, Robert Wood, University of Washington, Department of Atmospheric Sciences, Seattle, United States, Paquita Zuidema, University of Miami, Rosenstiel School, Department of Atmospheric Sciences, Miami, United States and ORACLES science team
Smoke interacting with clouds in the south-east Atlantic: representing CLARIFY case studies with the Unified Model (418203)
Hamish Gordon1, Ken S Carslaw2, Dan Grosvenor2, Adrian A Hill3, Ben J Shipway3, Jonathan Wilkinson4 and Paul Field3, (1)CERN European Organization for Nuclear Research, Physics, Geneva, Switzerland, (2)University of Leeds, Leeds, United Kingdom, (3)United Kingdom Met Office, Exeter, United Kingdom, (4)Met Office Hadley center for Climate Change, Exeter, United Kingdom
Aerosol Cloud Lifetime Effect Quantified Using Geostationary Satellite Observations (425051)
Matthew Christensen1, William Jones2, Jan Kazil3, Steven Abel4 and Philip Stier2, (1)University of Oxford, Oxford, United Kingdom, (2)University of Oxford, Department of Physics, Oxford, United Kingdom, (3)University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States, (4)Met Office, Exeter, United Kingdom
Observed Monsoon Precipitation Suppression Caused by Anomalous Inter-hemispheric Aerosol Transport Over the Gulf of Guinea (456548)
Osinachi Ajoku, Scripps Institution of Oceanography, La Jolla, United States, Arthur J Miller, University of California San Diego, La Jolla, CA, United States and Joel R Norris, Scripps Institution of Oceanography, University of California San Diego, La Jolla, United States
Dependence of Cloud and Precipitation Properties on Aerosol Concentrations Above and Below Clouds: Results from ORACLES (374700)
Siddhant Gupta, University of Oklahoma Norman Campus, Norman, United States, Greg M McFarquhar, Cooperative Institute for Severe and High-Impact Weather Research and Operations, University of Oklahoma, Norman, United States, Michael Poellot, University of North Dakota, Grand Forks, ND, United States, Joseph R O'Brien, University of North Dakota, Grand Forks, United States and Simone Tanelli, Jet Propulsion Laboratory, Pasadena, United States
Biomass Burning Aerosol Distributions over the Southeastern Atlantic Ocean measured by CALIOP and the NASA LaRC airborne High Spectral Resolution Lidar-2 (412214)
Richard Anthony Ferrare1, Sharon P Burton1, Anthony L Cook1, David B Harper2, Chris A Hostetler1, Johnathan W Hair1, Damien B Josset3, Marian Clayton4, Marta A Fenn5, Mark Vaughan2 and Yongxiang Hu1, (1)NASA Langley Research Center, Hampton, VA, United States, (2)NASA Langley Research Center, Hampton, United States, (3)Naval Research Laboratory, Ocean Siences Division, Stennis Space Center, MS, United States, (4)RSES: Coherent Application, Inc. - Psionic, LLC, Hampton, United States, (5)Coherent Applications, Inc. -Psionic, LLC, Hampton, United States
Aerosol and cloud properties through 3MI airborne simulator measurements: AEROCLO-sA field campaign in the Namibian region. (430297)
Aurélien Chauvigné1, Fabien Waquet1, Frederique Auriol2, Luc Blarel3, Cyril Delegove1, Oleg Dubovik4, Cyrille Flamant5, Paola Formenti6, Philippe Goloub7, Rodrigue Loisil1, Marc Mallet8, Jean-Marc Nicolas2, Fanny Peers9, Benjamin Torres10 and Frederic Parol1, (1)Laboratoire d'Optique Atmosphérique, Univ. Lille, CNRS, UMR 8518, Lille, France, (2)Laboratoire d'Optique Atmosphérique - Université de Lille, CNRS, UMR 8518, Villeneuve d'Ascq, France, (3)Laboratoire d'Optique Atmosphérique (Lille), Univ. Lille, CNRS, UMR 8518, Villeneuve, France, (4)Laboratoire d'Optique Atmosphérique, Villeneuve d'Ascq, France, (5)LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, Paris Cedex 05, France, (6)LISA, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL), Institut Pierre Simon Laplace, Créteil, France, (7)Laboratoire d'Optique Atmosphérique (Lille), Univ. Lille, CNRS, UMR 8518, Villeneuve d'Ascq, France, (8)CNRM / Meteo-France, Toulouse, France, (9)University of Exeter, Exeter, United Kingdom, (10)Laboratoire d'Optique Atmosphérique (LOA)/CNRS, University of Lille, Lille, France
Vertical Variability of Biomass Burning Aerosols over Southeast Atlantic and Radiative Impact (445544)
Yan Feng, DOE Argonne National Laboratory, Argonne, United States, Paytsar Muradyan, Argonne National Laboratory, Argonne, IL, United States, Harshvardhan Harshvardhan, Purdue University, West Lafayette, IN, United States, Veerabhadra Rao Kotamarthi, Argonne National Laboratory, Lemont, IL, United States, Connor J. Flynn, PNNL, Richland, United States, Arthur J Sedlacek III, Brookhaven National Laboratory, Upton, NY, United States and Paquita Zuidema, University of Miami, Rosenstiel School, Department of Atmospheric Sciences, Miami, United States

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