Proposed Drill Site: Ross-Amundsen Ice Divide, West AntarcticaEntry ID: Western_Divide_WAIS_Icecores_Site_Selection
Abstract: Proposed drill site near the Ross-Amundsen ice divide, West Antarctica
Describes conditions near the Ross-Amundsen ice divide, and discusses candidate
drill sites in context of the science objectives outlined in the lead proposal
for the project. We identify a preferred site for the Western Divide Core
To ... summarize:
- A suite of short (~100m) ice cores extracted during ITASE traverses in
central West Antarctica all show very well preserved records of seasonal
chemistry and recent global-scale volcanic eruptions.
- Sites near the divide with thick ice and moderate accumulation are most
likely to satisfy the science requirements.
- We make use of available geochemical and geophysical data and ice-flow
models to identify a preferred drill site that is 24 km southwest of the
present-day ice divide. Radar-detected internal stratigraphy upstream from the
site is smoothly varying. The combination of thick ice (3465m) and moderate
accumulation (21.5 cm/yr ice equivalent) at the site should produce a core with
stratigraphy that can be resolved annually back to ~44ka BP. Age at 96% depth
(3325m) is expected to be ~112ka BP.
- Co-ordinates for the site are 79.4676 S, 112.0859W, but sites within a
kilometer of this location will likely have equivalent characteristics.
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS
CRYOSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
CRYOSPHERE > SNOW/ICE > SNOW/ICE TEMPERATURE
CRYOSPHERE > SNOW/ICE > SNOW/ICE CHEMISTRY
CRYOSPHERE > GLACIERS/ICE SHEETS
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER THICKNESS/ICE SHEET THICKNESS
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION
Data Set Progress
Phone: 206 543 4585
Fax: 206 543 0489
Email: edw at ess.washington.edu
University of Washington Dept. of Earth and Space Sciences Box 351310
Province or State: WA
Postal Code: 98195-1310
Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Rd. #600
Province or State: TX
Postal Code: 78759-8500
Email: kendrick at dri.edu
Desert Research Institute 2215 Raggio Parkway
Province or State: NV
Postal Code: 89512
Email: paul.mayewski at maine.edu
Email: climatechange at maine.edu
Email: usitase at maine.edu
Climate Change Institute Department of Earth Sciences University of Maine 303 Bryand Global Science Building
Province or State: ME
Postal Code: 04469-5790
Country: United States
Email: steig at uw.edu
University of Washington Department of Earth and Space Sciences Box 35130 70 Johnson Hall
Province or State: WA
Postal Code: 98195-1310
Role: DIF AUTHOR
Email: bauer at nsidc.org
University of Colorado Cooperative Institute for Research in Environmental Sciences CIRES 449 UCB
Province or State: CO
Postal Code: 80309
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Creation and Review Dates
DIF Creation Date: 2005-06-30
Last DIF Revision Date: 2016-11-22