PP34A:
Aerosols, Clouds, and Paleoclimate I

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Session ID#: 17393

Session Description:
Aerosol and cloud radiative forcings are responsible for the large uncertainty in the overall radiative forcing over the industrial period and limit our ability to constrain climate sensitivity, but their role in paleoclimates has received limited recognition. Natural aerosols such as dust, sea-salt, ash, soot and emissions from vegetation have undoubtedly varied in Earth history, impacting radiative processes in the atmosphere, cloud formation (direct and indirect effects) and hydrological processes.

We welcome data and model contributions that consider changes in the magnitude and variability of natural aerosols and or cloud processes at all timescales (millennial to long-term). We aim to facilitate discussions between the modeling and data communities in how best to move forward in constraining pre-industrial ‘pristine’ climate sensitivity to aerosols and clouds, as well as move beyond CO2  forcing and temperature comparisons in improving our understanding of proxy reconstructions and model-data comparisons.

Primary Convener:  Navjit Sagoo, Yale University, New Haven, CT, United States
Conveners:  Natalie Burls, George Mason University, Atmospheric, Oceanic and Earth Sciences, Fairfax, VA, United States, Gisela Winckler, Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States and Trude Storelvmo, Yale University, New Haven, CT, United States
Chairs:  Navjit Sagoo, Yale University, New Haven, CT, United States and Natalie Burls, George Mason University, Atmospheric, Oceanic and Earth Sciences, Fairfax, VA, United States
OSPA Liaison:  Navjit Sagoo, Yale University, New Haven, CT, United States
Co-Organized with:
Paleoceanography and Paleoclimatology, and Atmospheric Sciences

Cross-Listed:
  • A - Atmospheric Sciences
  • GC - Global Environmental Change

Proposed Co-Organized Session with:
  • A - Atmospheric Sciences
Index Terms:

0321 Cloud/radiation interaction [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0429 Climate dynamics [BIOGEOSCIENCES]
0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
3311 Clouds and aerosols [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Clouds During Snowball Earth Events (Invited) (120672)
Dorian S Abbot, University of Chicago, Geophysical Sciences, Chicago, IL, United States
The Influence of Cloud Feedbacks on Glacial-Interglacial Variations in Climate (174604)
Anthony J Broccoli, Rutgers University New Brunswick, New Brunswick, NJ, United States, Neal T Graham, University of Maryland College Park, College Park, United States and Michael P Erb, University of Southern California, Los Angeles, CA, United States
A coherent understanding of water-isotope and ice-impurity variability in Antarctica at millennial to orbital time scales (121582)
Bradley R Markle1, Eric J. Steig2, Gerard Roe2, Gisela Winckler3 and Joe McConnell4, (1)California Institute of Technology, Pasadena, CA, United States, (2)University of Washington Seattle Campus, Seattle, WA, United States, (3)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (4)Desert Research Institute, Division of Hydrologic Science, Reno, United States
Tracking Australian Dust to the South Pacific Over the Last Glacial Cycle (174906)
Alejandra Borunda, Columbia University of New York, Palisades, NY, United States, Gisela Winckler, Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, Steven L Goldstein, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, Paul Travis Vallelonga, Centre for Ice and Climate, Copenhagen, Denmark and Michael R Kaplan, Lamont-Doherty Earth Observatory, Palisades, NY, United States
A newly identified sea salt aerosol source over sea ice and implications for climate (138559)
Xin Yang1, Markus M Frey2, Rachael Rhodes3, Sarah J. Norris4, Ian M Brooks5, Philip A. Anderson6, Kouichi Nishimura7, Anna E. Jones2 and Eric W Wolff8, (1)Natural Environment Research Council, British Antarctic Survey, Cambridge, United Kingdom, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)University of Cambridge, Department of Earth Science, Cambridge, United Kingdom, (4)University of Leeds, Leeds, United Kingdom, (5)University of Leeds, Institute for Climate and Atmospheric Science, Leeds, United Kingdom, (6)Scottish Association for Marine Science, Oban, United Kingdom, (7)Nagoya University, Nagoya, Japan, (8)University of Cambridge, Cambridge, United Kingdom
Investigating the Indirect Effects of Dust on Paleoclimates via Ice Clouds (135792)
Navjit Sagoo and Trude Storelvmo, Yale University, New Haven, CT, United States
Impact of Dust Reduction on the Mid-Holocene Climate (198220)
Yonggang Liu, Peking University, Department of Atmospheric and Oceanic Sciences, School of Physics, Beijing, China and Ming Zhang, Peking University, Atmospheric and Oceanic Sciences, Beijing, China

See more of: Paleoceanography and Paleoclimatology