AI51A:
Processes Affecting Air-Sea Exchange and the Biogeochemistry of the Upper Ocean I

Session ID#: 93431

Session Description:
Gas, aerosol, and heat exchange processes across the air-sea interface impact global biogeochemical cycles, marine ecosystem dynamics, and atmospheric chemistry. Understanding these exchange processes is therefore critical for the prediction of climate change. Atmospheric deposition of micro- and macro-nutrients, organic matter, and pollutants influence biogeochemical cycling, primary productivity, and biological community composition in the ocean. Emissions of gases and aerosol particles from the sea surface to the atmosphere affect the number and composition of cloud condensation nuclei and ice nucleating particles with important consequences for understanding clouds and climate. Upper-ocean processes, including the sea surface microlayer and phytoplankton and microbial compositions, are both affected by and influence these exchange processes. The upper ocean with its high and variable incident radiation, turbulence, and physical, chemical, and biological horizontal and vertical gradients must therefore be considered when estimating exchange rates of particles, heat and gases. 

Over the past decade, major field campaigns in chronically under-observed regions, breakthroughs in autonomous platforms and sensors, and innovations in numerical modeling and data analysis techniques have significantly advanced our understanding of the processes and rates of air-sea gas exchange, particularly for carbon dioxide. These advances are helping to improve regional and global model estimates of carbon budgets, and therefore, baseline information for the UN Decade of Ocean Science for Sustainable Development. This session invites theoretical, experimental, observational and model studies as well as technological advances for the investigation of upper ocean biogeochemical influences on and consequences of air-sea exchange processes.

Co-Sponsor(s):
  • CT - Chemical Tracers, Organic Matter and Trace Elements
  • CP - Coastal and Estuarine Processes
  • IS - Ocean Observatories, Instrumentation and Sensing Technologies
  • OB - Ocean Biology and Biogeochemistry
  • OM - Ocean Modeling
  • PI - Physical-Biological Interactions
Index Terms:

4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4504 Air/sea interactions [OCEANOGRAPHY: PHYSICAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL]
4820 Gases [OCEANOGRAPHY: CHEMICAL]
Primary Chair:  Andrew S Wozniak, University of Delaware, School of Marine Science and Policy, Newark, DE, United States
Co-chairs:  Mariana Ribas Ribas, Carl von Ossietzky Universität Oldenburg, Institute for Chemistry and Biology of the Marine Environment, Wilhelmshaven, Germany, Alison R Gray, University of Washington, School of Oceanography, Seattle, WA, United States and Jaime B Palter, McGill University, Montreal, QC, Canada
Primary Liaison:  Andrew S Wozniak, University of Delaware, School of Marine Science and Policy, Newark, DE, United States
Moderators:  Joellen L Russell, University of Arizona, Tucson, AZ, United States and Jaime B Palter, McGill University, Montreal, QC, Canada
Student Paper Review Liaison:  Jaime B Palter, McGill University, Montreal, QC, Canada

Abstracts Submitted to this Session:

New Estimates of Global and Hemispheric Ocean-Atmosphere CO2 flux 1992-2018. and Their Uncertainty (644183)
Andrew J. Watson1, Ute Schuster1, Jamie Shutler2, Thomas Holding1 and Peter Landschuetzer3, (1)University of Exeter, Exeter, United Kingdom, (2)University of Exeter, Centre for Geography, Environment and Society, Penryn, United Kingdom, (3)Max Planck Institute for Meteorology, Hamburg, Germany
Air-sea CO2 flux measurements on the first autonomous circumnavigation of Antarctica (647158)
Adrienne J Sutton, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Nancy Williams, University of South Florida, St Petersburg, United States and Bronte D Tilbrook, CSIRO Marine and Atmospheric Research, Hobart, TAS, Australia
Southern Ocean CO2 fluxes: new year-round observations from moorings in the West Antarctic Peninsula and Subantarctic Zone (649671)
Elizabeth H Shadwick, Virginia Institute of Marine Science, Gloucester Point, VA, United States; CSIRO Oceans and Atmosphere, Hobart, TAS, Australia, Hugh W Ducklow, Lamont Doherty Earth Observatory, New York, NY, United States, Douglas G Martinson, Lamont -Doherty Earth Observatory, Division of Ocean and Climate Physics, Palisades, NY, United States, Adrienne J Sutton, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States and Thomas W. Trull, Commonwealth Scientific and Industrial Research Organisation, Marine and Atmospheric Research, Antarctic Climate Ecosystems Cooperative Research Centre, Hobart, TAS, Australia
The Atmospheric Signature of Southern Ocean Carbon Fluxes (656215)
Matthew C Long1, Britton B Stephens2, Colm Sweeney3, Eric A Kort4, Ralph F Keeling5 and Kathryn McKain3, (1)National Center for Atmospheric Research, Climate and Global Dynamics, Boulder, CO, United States, (2)National Center for Atmospheric Research, Earth Observing Laboratory, Boulder, CO, United States, (3)NOAA, Global Monitoring Laboratory, Boulder, United States, (4)University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, United States, (5)Univ California San Diego, La Jolla, CA, United States
Storms link vertical turbulent mixing to CO2 outgassing in the Southern Ocean (649853)
Sarah-Anne Nicholson1, Marcel du Plessis2, Alice Dolaine Lebehot2, Daniel B Whitt3, Ilker Fer4, Sebastian Swart5 and Pedro M. S. Monteiro1, (1)Council for Scientific and Industrial Research, Cape Town, South Africa, (2)University of Cape Town, Department of Oceanography, Cape Town, South Africa, (3)NASA, Mountain View, CA, United States, (4)University of Bergen, Bergen, Norway, (5)University of Gothenburg, Gothenburg, Sweden
Effect of resolution on heat and carbon dynamics in a regional ocean circulation model for the Argentine Basin (643542)
Stan Swierczek1, Matthew R Mazloff2, Matthias Morzfeld3 and Joellen L Russell1, (1)University of Arizona, Tucson, AZ, United States, (2)Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States, (3)University of Arizona, Department of Mathematics, Tucson, AZ, United States
Observational constraints on abiotic marine VOC sources (644432)
Gordon Novak, Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, CO, United States, Michael P Vermeuel, University of Wisconsin Madison, Chemistry, Madison, United States, Delaney B. Kilgour, University of Wisconsin Madison, Department of Chemistry, Madison, United States and Timothy Bertram, University of Wisconsin Madison, Chemistry, Madison, WI, United States
A Spectral View of the Seasonality and Size Differences of Marine Aerosol in the North Atlantic (649531)
Savannah Lewis1, Georges Saliba1, Lynn M Russell1, Patricia Quinn2, Timothy S Bates3, Kay D Bidle4, Benjamin Diaz5, Kimberly Halsey6, Craig A Carlson7 and Michael Behrenfeld6, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (2)NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, WA, United States, (3)NOAA PMEL, Seattle, United States, (4)Rutgers University, Marine and Coastal Sciences, New Brunswick, NJ, United States, (5)Rutgers University New Brunswick, Microbial Biology, New Brunswick, NJ, United States, (6)Oregon State University, Corvallis, OR, United States, (7)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States