A14B:
Cloud-Aerosol-Radiation-Climate Interactions in the Southeast Atlantic I

Submit an Abstract to this Session



Session ID#: 30803

Session Description:
The southeastern Atlantic hosts one of the largest planetary low cloud decks, unique in being overlain by optically thick aerosol layers of biomass burning aerosol at times. The reflective clouds help set the regional large-scale circulation. The smoke layers absorb shortwave radiation and can produce a direct radiative climate warming when underlain by bright low clouds. The clouds, in turn, are susceptible to atmospheric aerosol in ways that include changes in atmospheric stability and free-tropospheric moisture, and microphysical interactions. The combined impacts on current and future climate are currently poorly understood. Both the low cloud deck and the smoke layer are challenging to simulate at all scales, constituting a major uncertainty in our understanding of key processes and the regional climate. Studies that present new research focused on all aspects of observation and modeling of the interactions between clouds, aerosol, radiation, precipitation and climate over the southeastern Atlantic are solicited.
Primary Convener:  Paquita Zuidema, University of Miami, Rosenstiel School, Department of Atmospheric Sciences, Miami, United States
Conveners:  Sarah J Doherty, University of Washington, Department of Atmospheric and Climate Science, Seattle, United States, Samuel E LeBlanc, NASA Ames Research Center, Moffett Field, United States and Greg M McFarquhar, University of Oklahoma, Cooperative Institute for Mesoscale Meteorological Studies and School of Meteorology, Norman, OK, United States
Chairs:  Greg M McFarquhar, Cooperative Institute for Severe and High-Impact Weather Research and Operations, University of Oklahoma, Norman, United States, Samuel E LeBlanc, Bay Area Environmental Research Institute, Moffett Field, United States and Sarah J Doherty, University of Washington, Department of Atmospheric and Climate Science, Seattle, United States
OSPA Liaison:  Samuel E LeBlanc, Bay Area Environmental Research Institute, Moffett Field, 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:

The CLouds-Aerosol-Radiation Interaction and Forcing: Year 2017 (CLARIFY-2017) programme: deployment, synergies with ORACLES/LASIC/AEROCLO-SA and initial results (Invited) (206052)
James Matthew Haywood1, Steven Abel2, Justin Langridge2, Hugh Coe3, Alan M Blyth4, Nicolas Bellouin5, Philip Stier6, Paul Field2, Ken S Carslaw7 and Malcome Brooks8, (1)University of Exeter, Exeter, United Kingdom, (2)Met Office, Exeter, United Kingdom, (3)University of Manchester, Department of Earth and Environmental Sciences, Manchester, United Kingdom, (4)National Centre for Atmospheric Science, Environment, Leeds, United Kingdom, (5)University of Reading, Department of Meteorology, Reading, United Kingdom, (6)University of Oxford, Department of Physics, Oxford, United Kingdom, (7)University of Leeds, Leeds, United Kingdom, (8)UK Met Office, Reading, United Kingdom
Aerosol-radiation-cloud interactions in the South-East Atlantic: results from the ORACLES-2016 deployment and a first look at ORACLES-2017 and beyond (236185)
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
A first summary of the Layered Atlantic Smoke Interactions with Clouds (LASIC) campaign in the remote southeast Atlantic (230785)
Paquita Zuidema1, Adeyemi A Adebiyi2, Allison C Aiken3, Yann Blanchard4, Vagner Castro5, Christine Chiu6, Bruno Cunha5, Rodrigo Delgadillo7, Connor J. Flynn8, Joseph Clinton Hardin9, Bradley M. Isom10, Paytsar Muradyan11, Kim L Nitschke12, Lakshmi Ramajiguru13, Maciej Ryczek Ryczek5, Arthur J Sedlacek III14, Stephen R. Springston14, Juarez Viagas5, Janek Uin14 and Jianhao Zhang15, (1)University of Miami, Rosenstiel School, Department of Atmospheric Sciences, Miami, United States, (2)University of Miami, Miami, United States, (3)Los Alamos National Laboratory, Earth and Environmental Science Division, Los Alamos, NM, United States, (4)University of Reading, Reading, United Kingdom, (5)Atmospheric Radiation Measurement, Los Alamos, NM, United States, (6)Colorado State University, Fort Collins, United States, (7)University of Miami, Miami, FL, United States, (8)PNNL, Richland, United States, (9)Pacific Northwest National Laboratory, Richland, United States, (10)Pacific Northwest National Laboratory, Richland, WA, United States, (11)Argonne National Laboratory, Argonne, IL, United States, (12)Los Alamos National Laboratory, Los Alamos, NM, United States, (13)University of Miami, RSMAS/Dept. of Atmospheric Sciences, Miami, FL, United States, (14)Brookhaven National Laboratory, Upton, NY, United States, (15)University of Miami, RSMAS, Miami, United States
Cumulus population and microphysical properties retrieved from a synergy of scanning radar and shortwave zenith radiances over Southeast Atlantic (269840)
Yann Blanchard, University of Reading, Department of Meteorology, Reading, RG6, United Kingdom, Christine Chiu, University of Reading, Department of Meteorology, Reading, United Kingdom, Robin Hogan, ECMWF, Reading, United Kingdom, Paquita Zuidema, University of Miami, Rosenstiel School, Department of Atmospheric Sciences, Miami, United States and Bradley M. Isom, Pacific Northwest National Laboratory, Richland, WA, United States
Direct Aerosol Radiative Effects and Heating Rates: Results from the 2016 and 2017 ORACLES Field Campaigns (247193)
Sabrina Cochrane1,2, Sebastian Schmidt2,3, Hong Chen4,5, Peter Pilewskie5,6, Jens Redemann7, Samuel E LeBlanc8,9, Steven E Platnick10, Kerry Meyer11,12, Richard Anthony Ferrare12, Sharon P Burton12, Chris A Hostetler12 and Hironobu Iwabuchi13, (1)University of Colorado at Boulder, Boulder, CO, United States, (2)Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (3)University of Colorado Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, United States, (4)University of Colorado at Boulder, Boulder, United States, (5)University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics, Boulder, United States, (6)LASP, University of Colorado, Boulder, United States, (7)University of Oklahoma, School of Meteorology, Norman, United States, (8)Bay Area Environmental Research Institute, Moffett Field, United States, (9)NASA Ames Research Center, Bay Area Environmental Research Institute, Moffett Field, United States, (10)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (11)NASA Goddard Space Flight Center, Greenbelt, United States, (12)NASA Langley Research Center, Hampton, VA, United States, (13)Tohoku University, Department of Geophysics, Graduate School of Science, Sendai, Japan
Biomass Burning Organic Aerosol as a Modulator of Droplet Number in the Southern Atlantic (279086)
Mary Kacarab, Georgia Institute of Technology Main Campus, Earth and Atmospheric Sciences, Atlanta, GA, United States, Steven G Howell, University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, Jennifer D. Small Griswold, University of Hawaii at Manoa, Atmospheric Sciences, Honolulu, HI, United States, Kenneth Lee Thornhill II, NASA Langley Research Center, Hampton, United States, Robert Wood, University of Washington, Department of Atmospheric and Climate Science, Seattle, United States, Jens Redemann, University of Oklahoma, School of Meteorology, Norman, United States and Athanasios Nenes, Foundation for Research and Technology, Center for the Study of Air Quality and Climate Change (C-STACC), Institute of Chemical Engineering Sciences (ICE-HT), Patras, Greece
Entrainment and cloud evaporation deduced from the stable isotope chemistry of clouds during ORACLES (241708)
David Noone, Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, Dean Henze, NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Bryan Jeremy Rainwater, University of Colorado at Boulder, Boulder, CO, United States and Prof. Darin W Toohey, PhD, Univ Colorado, Boulder, CO, United States

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