Monday, August 3, 2009: 1:30 PM-5:00 PM
San Miguel, Albuquerque Convention Center
OOS 1 - Ecological Contributions to the International Polar Year (IPY): High Latitude Ecosystem Ecology in an Era of Global Change
The session will describe both measurements and models of polar biogeochemistry and hydrology, as well as the combination of measurements and models using data assimilation. Projects funded under the auspices of the International Polar Year (IPY) are particularly encouraged. Speakers will be expected to discuss the ecological aspects of their findings, and to emphasize the importance of the polar ecological experience to ESA members. The observation-based studies will be presented first to motivate the modeling and data assimilation talks. The session will begin with a discussion of long-term trace gas flux observations from Walt Oechel. Jeffrey Welker will then discuss recent measurements of biogeochemical cycling in northern and western Greenland, and Donatella Zona will show new results from large-scale ecosystem manipulations from the recent 1-ha drying experiments near Barrow. An international team from the laboratory of Brian Sorrell of the National Institute of Water and Atmospheric Research in New Zealand will describe new findings on ecosystem metabolism during the transient snowmelt season in meltwater ponds in Antarctica. This experimental work will lead to an analysis of measurement uncertainty and implications for future C flux estimates by Howard Epstein, which will motivate the modeling and data assimilation studies which will follow after the break. Ed Rastetter will introduce the use of the Ensemble Kalman Filter for data assimilation, using the example of assimilating pan-arctic eddy covariance measurements into simple ecosystem models (During his talk, Gus Shaver would like to briefly describe the impacts of a recent fire in the North Slope of Alaska.) Paul Stoy will then describe the use of data assimilation and information theory to constrain C flux estimates at scales from leaf to region using data from the ABACUS project in northern Fennoscandia. The modeling studies will be synthesized with Dave McGuire’ss retrospective analysis of the Arctic Carbon Cycle Assessment including large-scale modeling results over the past decade. Two additional talks will be chosen by the conference organizers.
Organizer:Paul C. Stoy, University of Edinburgh
Co-organizer:Edward B. Rastetter, Marine Biological Lab
Moderator:Gaius Shaver, Marine Biological Laboratory
1:30 PMOOS 1-1Long-term observations of trace gas fluxes in the Arctic
Walter C. Oechel, San Diego State University, Steven J. Hastings, Polar Field Services, Inc., Hiroki Ikawa, San Diego State University, Hyojung Kwon, Yonsei University, Cheryl Laskowski, San Diego State University, Joseph Verfaille Jr., University of California, Berkeley, Donatella Zona, University of California, Davis, Rommel Zulueta, San Diego State University
1:50 PMOOS 1-2Experimental increases of temperature and snow depth in the high and low Arctic alter the magnitudes and patterns of ecosystem CO2 exchange
Jeffrey M. Welker, University of Alaska, Patrick F. Sullivan, University of Alaska, Sean Cahoon, University of Alaska, Matthew Rogers, University of Alaska, Lina Taneva, University of Alaska, Robert Pattison, University of Alaska, Eric Post, Penn State University, Heidi Steltzer, Colorado State University
2:10 PMOOS 1-3The consequence of the change in hydrology on CO2 fluxes in the Arctic tundra: Results from the first large-scale water table manipulation experiment in the Alaskan Arctic tundra
D. Zona, San Diego State University, Walter C. Oechel, San Diego State University, Steven F. Oberbauer, Florida International University, Paulo C. Olivas, Florida International University, CE Tweedie, University of Texas at El Paso, Larry Hinzman, University of Alaska, Fairbanks,, Anna Liljedahl, University of Alaska, Fairbanks,, David A. Lipson, San Diego State University
2:30 PMOOS 1-4Consequences of an altered fire regime on climate and carbon storage in arctic tundra
Adrian Rocha, Marine Biological Laboratory, Mark Flanner, National Center for Atmospheric Research,, Michelle C. Mack, University of Florida, Gaius R. Shaver, Marine Biological Laboratory
2:50 PMOOS 1-5Late-season metabolic processes during freezing of meltwater ponds of the McMurdo ice shelf
Ian Hawes, Aquatic Research Solutions Ltd, Karl Safi, National Institute of Water and Atmospheric Research, Brian Sorrell, National Institute of Water and Atmospheric Research, David Arscott, National Institute of Water and Atmospheric Research, Jenny Webster-Brown, University of Auckland, Clive Howard-Williams, National Institute of Water and Atmospheric Research
3:10 PM Break
3:20 PMOOS 1-6Assimilating arctic C flux data into an ecosystem model using the Ensemble Kalman Filter
Edward B. Rastetter, Marine Biological Lab, M. Williams, University of Edinburgh, Kevin L. Griffin, Lamont Doherty Earth Observatroy, B. Kwiatkowski, Marine Biological Lab, G. Tomasky, Marine Biological Lab, M. Potosnak, DePaul University, Paul C. Stoy, University of Edinburgh, Gaius Shaver, Marine Biological Laboratory, M. Stieglitz, Georgia Institute of Technology, G. Kling, University of Michigan, John E. Hobbie, Marine Biological Laboratory
3:40 PMOOS 1-7Assimilating multi-scale observations into ecological models to reduce the uncertainty of carbon flux estimates in northern Fennoscandia
Paul C. Stoy, University of Edinburgh, M. Williams, University of Edinburgh, T Hill, University of Edinburgh, J. Evans, Centre for Ecology and Hydrology, B. Fletcher, University of Sheffield, J. Gornall, Met Office, I. Hartley, Stirling University, P. Ineson, York University, V. Sloan, University of Sheffield, R. Poyatos, Durham University, A. Prieto-Blanco, UCL, L. Street, University of Edinburgh, T Wade, University of Edinburgh, J Moncrieff, University of Edinburgh, J Subke, York University
4:00 PMOOS 1-8The contemporary carbon cycle of the pan-Arctic: Data, models and spatial-temporal dynamics
A. David McGuire, University of Alaska Fairbanks
4:20 PMOOS 1-9Net radiative forcing potential of landscapes in Beringia from carbon dioxide (CO2) and methane (CH4) exchange
David H. Lin, University of Texas at El Paso, Craig Tweedie, University of Texas at El Paso, Christian Andresen, University of Texas at El Paso, Yit A. Teh, University of St. Andrews, Steven Oberbauer, Florida International University, John A. Gamon, University of Alberta, Torben Christensen, Lund University
4:40 PMOOS 1-10Exploring the impacts of experimental warming in the Arctic: A shift to shrub dominance and biogeochemical changes in deeper soils
Seeta Sistla, University of California, Santa Barbara, Joshua P. Schimel, University of California, Santa Barbara

See more of Organized Oral Session

See more of The 94th ESA Annual Meeting (August 2 -- 7, 2009)