PP43E:
The Global Expression of the 8.2 ka Event Posters


Submit an Abstract to this Session


Session ID#: 53233

Session Description:
The last major abrupt climate event occurred ca. 8,200 years ago, following the abrupt climate transitions of the last glacial cycle. These events, which were associated with variations in the strength of the Atlantic Meridional Overturning Circulation, provide unique insight into the global climate system and demonstrate its ability to undergo dramatic reorganization on decadal timescales. The 8.2 ka event holds particular relevance for future climate change as evidence suggests that the AMOC may weaken under anthropogenic greenhouse gas forcing. Paleoclimate data and climate models have provided important insight into the 8.2 ka event, but substantial uncertainty remains regarding its spatial characteristics and teleconnection patterns. We invite contributions of new proxy records, data syntheses and/or model simulations to assess the current state of knowledge of the spatial expression, teleconnections and dynamical mechanisms of the 8.2 ka event.
Primary Convener:  Alyssa R. Atwood, University of California Berkeley, Geography, Berkeley, CA, United States; Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States
Convener:  Julian P Sachs, University of Washington, School of Oceanography, Seattle, WA, United States
Primary Liaison:  Alyssa R. Atwood, University of California Berkeley, Geography, Berkeley, CA, United States; Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States
Chairs:  Alyssa R. Atwood, University of California Berkeley, Geography, Berkeley, CA, United States; Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States and Julian P Sachs, University of Washington, School of Oceanography, Seattle, WA, United States
OSPA Liaison:  Alyssa R. Atwood, University of California Berkeley, Geography, Berkeley, CA, United States; Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States
Index Terms:

4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4914 Continental climate records [PALEOCEANOGRAPHY]
4928 Global climate models [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Sediment dynamic sortable silt suggest variable Labrador Current and Labrador Sea Water strength during the Younger Dryas and 8,200-year meltwater outburst event (361239)
Harunur Rashid, Memorial University of Newfoundland Grenfell, Corner Brook, NF, Canada, David Piper, Bedford Institute of Oceanography, Geological Survey of Canada, Dartmouth, NS, Canada, Jon Mackie, Dalhousie University, Department of Oceanography, Halifax, Canada and Huangmin Ge, Shanghai Ocean University, College of Marine Sciences, Shanghai, China
South American Monsoon system during the 8.2 ka event (363309)
Wilton Aguiar, Universidade Federal do Rio Grande, Rio Grande-RS, Brazil, Luciana Prado, University of Brasilia, Institute of Geosciences, Brasilia, Brazil, Mauricio M Mata, Federal University of Rio Grande, Instituto de Oceanografia, Rio Grande, Brazil and Ilana C Wainer, University of Sao Paulo, Sao Paulo, Brazil
Application of the Speleothem Calcium Isotope Paleo-Rainfall Proxy to the 8.2 Ka Event in Coastal California (363399)
Cameron B de Wet, University of California Davis, Earth and Planetary Sciences, Davis, United States, Andrea M Erhardt, University of Kentucky, Department of Earth and Environmental Sciences, Lexington, KY, United States, Warren D. Sharp, Berkeley Geochronology Center, Berkeley, CA, United States and Jessica Leigh Oster, Vanderbilt University, Earth and Environmental Sciences, Nashville, TN, United States
Timing of Subtropical Iceberg Transport and Meltwater Flows in the Deglacial North Atlantic (381179)
Jenna C Hill, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, United States and Alan Condron, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Constraint on North Atlantic Circulation Change During the 8.2 ka Event Using High Resolution Sediment Cores, and its Comparison to Industrial Era Circulation Changes. (411908)
Robbie Mallett1, David Thornalley2, Peter Spooner3, Emma Cooper3, Laura Thrower3 and Delia Oppo4, (1)University College London, London, United Kingdom, (2)University College London, Department of Geography, London, United Kingdom, (3)University College London, Dept. of Geography, London, United Kingdom, (4)WHOI, Geology and Geophysics, Woods Hole, United States
Effect of the 8.2 ka event on the circulation, oxygen content and P cycling of Sapropel Intermediate Water (500-1800m) in Eastern Mediterranean (429312)
Eleen Zirks1, Michael Krom1, Dongdong Zhu1, Beverly Goodman-Tchernov1 and Gerhard H Schmiedl2, (1)University of Haifa, Haifa, Israel, (2)Univ Hamburg, Hamburg, Germany
Model Parameterization and the Modulation of Ocean Responses to Surface Freshwater Forcing (Invited) (439173)
Allegra N. LeGrande, NASA GISS 568, New York, United States
What are the differences between 4.2ka and 8.2ka climate events? (463976)
Liang Ning, Nanjing Normal University, School of Geography, Nanjing, China, Jian Liu, Nanjing Normal University, School of Geographical Sciences, Nanjing, China, Raymond S Bradley, University of Massachusetts Amherst, Geosciences, Amherst, MA, United States and Mi Yan, Nanjing Normal University, Nanjing, China

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