HR: 1340h
AN: A23B-0801    [Abstracts]
TI: Arctic Surface and Atmospheric States: NSA Analogs to SHEBA and Interannual Variability
AU: * Stramler, K
EM: kstramler@giss.nasa.gov
AF: Columbia University, Dept. of Earth and Environmental Sciences, Armstrong Hall 2880 Broadway, New York, NY 10025 United States
AU: Del Genio, A D
EM: adelgenio@giss.nasa.gov
AF: NASA/GISS, 2880 Broadway, New York, NY 10025 United States
AU: Martinson, D G
EM: dgm@ldeo.columbia.edu
AF: Lamont-Doherty Earth Observatory of Columbia University, Oceanography 105D 61 Route 9W., Palisades, NY 10964 United States
AU: Rossow, W B
EM: wrossow@giss.nasa.gov
AF: NASA/GISS, 2880 Broadway, New York, NY 10025 United States
AB: Both winter and summer at the Surface Heat Budget of the Arctic Ocean (SHEBA) site can be described as dynamic equilibria between surface and atmosphere, where, for each season, different mechanisms are used by the constituent media to exchange energy. The wealth of measurements at SHEBA that allowed the processes of energy exchange there to be examined in such detail are only available for a single calendar year. However, a multiple year, high temporal resolution observational record is available nearby, from the Atmospheric Radiation Measurement (ARM) Program's North Slope of Alaska (NSA) Point Barrow installation. Here we consider how representative the Point Barrow site is of the SHEBA site, for both warm and cold season processes, by highlighting common traits of the atmosphere as it interacts with two prevalent Arctic surface types (perennial sea ice at SHEBA and tundra-topped permafrost at NSA). We also investigate the interannual variability of clear and cloudy sky surface air temperature, surface radiation fluxes, and atmospheric temperature and humidity structure at NSA, finding similar preferred modes of behavior there as observed at SHEBA, with clear sky temperature and moisture variations accounting for the bulk of the interannual variability in surface radiative energy exchange.
DE: 3322 Land/atmosphere interactions
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
DE: 3349 Polar meteorology
DE: 1620 Climate dynamics (3309)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting