Draft Proposal 2004 - page 7

US ITASE science activities in West Antarctica (1999-2003) comprised 11 funded research programs (Table 1 – Currently funded US ITASE research programs) *denotes expressed interest in 2005-2007 activities.

Investigators Institution Discipline
Mary Albert * CRREL Snow and firn microstructure
Steve Arcone * CRREL High resolution radar profiling
Roger Bales * Arizona Hydrogen peroxide, formaldehyde
David Bromwich * Ohio State Meteorology
Gordon Hamilton * Maine Satellite image analysis
Gordon Hamilton * Maine Mass balance, accumulation rates
Bob Jacobel * St Olaf Deep radar
Paul Mayewski * Maine Glaciochemistry
Dave Meeker UNH/Maine  
Joe McConnell * DRI Trifluoroacetate
Deb Meese CRREL Stratigraphy
Tony Gow* CRREL Stratigraphy
Eric Steig * Washington Stable isotopes
Jim White * Colorado  
Chris Shuman * NASA  


US ITASE Scientific Contributions
A listing of scientific products (abstracts, papers, reports) produced by research teams involved in ITASE and US ITASE is available at (see “Toward a high resolution Southern Hemisphere Climate Reconstruction: Mapping the Antarctic ice sheet in space and time” by Members of US ITASE and summary Mayewski, 2003). Among the scientific accomplishments of US ITASE are:

  1. high resolution detailing of surface and deep radar reflectors as continuous time stratigraphic horizons across the thousands of km of traverse route (Arcone et al., in press 2004; Spikes et al., in press 2004)
  2. ice core calibration of radar reflectors in the upper 100 meters of the ice sheet to determine the source of these relectors (Arcone et al., in press 2004)
  3. mapping of spatial and temporal variability in accumulation rates over large distances using ground penetrating radar, and investigating the causes of these variations (Spikes et al., in press 2004; Hamilton, in press)
  4. examination of physical causes of radar backscatter variations in RADARSAT imagery (Stearns et al., in press) and other remote sensing validation work (Shuman and Comiso, 2001; Hamilton and Spikes, in press)
  5. examination of spatial variability in major ions over west Antarctica and relationship to sources (Kreutz and Mayewski, 1999; Kreutz et al., 1999, 2000; Dixon et al., in press 2004; Isaksson et al., 2001; Kaspari et al., in press 2004)
  6. ice core reconstructions of seasonal, inter-annual and decadal scale variability in accumulation rate, temperature, atmospheric circulation, volcanic activity, and sea ice extent and relation to models (Kreutz and Mayewski, 1999; Reusch et al., 1999; Qin et al., 2000; Guo et al., in review; Guo et al., 2002; Meese and Gow, 2002; Meyerson et al., in review; Isaksson et al., 2001; Souney et al., 2002; Palmer et al., 2001; Bertler et al., in press 2004; Dixon et al., in press 2004)
  7. identification of ENSO, ACW (Antarctic circumpolar Wave), PDO (Pacific Decadal Oscillation), EAH (East Antarctic High), and ASL (Amundsen Sea Low) atmospheric circulation structure in glaciochemical time-series and implications and relationship to models (Kreutz et al., 2000; Mayewski and White, 2002; Meyerson et al., 2002, in review; Bromwich et al., 1999, 2003; Mayewski et al., 2001, in press 2004c; Souney et al., 2002; Goodwin et al., 2004 )
  8. assessment of modern global climate change (short-term variability in snowfall, temperature, and atmospheric circulation, pollution) in the context of decadal to centennial-scale variability (Reusch et al., 1999; Qin et al., 1999; Hamilton, in press; SCAR ISMASS Committee (including Hamilton), in press; Meese and Gow, 2002)
  9. deconvolution of local-scale variability in ice core-derived accumulation rate compared to regional scale variability (Hamilton, in press; Spikes et al., in press 2004)
  10. glaciological reconnaissance for deep drilling (Hamilton et al., to be submitted; Frey et al., 2002)
  11. high resolution mapping of subglacial topography in previously unexplored regions (Welch and Jacobel, 2001, 2002)
  12. characterization of ice flow dynamics based on deformation of internal stratigraphy, basal and ice surface topography (Hamilton and Spikes, in press; Welch and Jacobel, 2001, 2002)
  13. characterization of basal reflectivity based on changes in basal temperature and/or geology (Welch and Jacobel, 2001, 2002)
  14. identification of zones of basal melting in the interior of West Antarctica and ice stream shear along the coast utilizing satellite-derived (GPS) ice flow measurements (Hamilton and Whillans, to be submitted)
  15. air sampling in the interior of West Antarctica and air snow processes (Frey et al., 2001, 2002; Albert and Leeman, 2002)
  16. snow and firn permeability and microstructure measurements at locations with greatly differing accumulation rates and average temperature (Albert, 2001, 2002; Albert and Leeman, 2002, in prep.)
  17. physical property measurements of annual layer stratigraphy, depth/density profiles and crystal growth profiles as a function of age and in situ temperature in snowpits and ice cores (Gow and Meese, 2002)

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