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 |
INTELLECTUAL MERIT
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:
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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 )
- 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)
- 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)
- glaciological reconnaissance for deep drilling (Hamilton et al., to be submitted; Frey et al., 2002)
- high resolution mapping of subglacial topography in previously unexplored regions (Welch and Jacobel, 2001, 2002)
- 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)
- characterization of basal reflectivity based on changes in basal temperature and/or geology (Welch and Jacobel, 2001, 2002)
- 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)
- air sampling in the interior of West Antarctica and air snow processes (Frey et al., 2001, 2002; Albert and Leeman, 2002)
- 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.)
- 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)