Land and sea ice sructure west and south of Ross Island measured by ground penetrating radar, UAV, and helicopter EM bird
Entry ID: K053_2009_2012_NZ_1

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Summary
Abstract: This data set decribes surface and volume properties of snow and ice to validate radar satellite measurements. Ground penetrating radar (GPR) at 500 and 1000GHz provides information on snow layers and thickness near the surface at two sites on the McMurdo Ice Shelf, one site at Ross Island, and on the landfast and new sea ice in McMurdo Sound. A 50MHz antenna is used to measure total ice thickness and the thickness of the ice above the saline layer underneath the ice shelf. Snow density and morphology is measured in snow pits using standard glaciological methods and an infrared camera, as well as an ice corer for depths down to about 8m. Snow stakes were used to measure the annual accumulation on land ice over a one year period. A dust layer is used to quantify the average accumulation over a 5 year period. Stake and GPR measurements suggest a high temporal and spatial variabilty in snow accumulation near Ross Island. A laser ranger on the skidoo and a small unmanned aircraft are used to determine the surface roughness of snow on land ice. For sea ice, the GPR system is used on one north south and two east-west transects to measure snow thickness on ice. Ice drilling is used to determine total sea ice thickness along the transects. A helicopter EM bird is used to measure a grid of sea ice and ice shelf thickness across the McMurdo Sound. Ground measurements validate the performance of the HEM bird in the presence of platelet ice.

In 2011 more in-depth research was conducted into sea ice thickness. The subice platelet layer thickness under sea ice was measured in regular intervals at two North-South oriented profiles and four east-west oriented profiles. Holes were drilled at regular intervals into sea ice at measurement sites about 5 km apart. At these holes sea ice thickness and snow depth on top of the sea ice was measured. In between the sites, sea ice thickness was measured using an electromagnetic induction device, and snow on sea ice was measured using a ground penetrating radar system. Ocean temperature and salinity was measured through holes in the sea ice along the ice edge of the McMurdo Ice Shelf within 3 km of the ice shelf front. The response of the sea ice to tidal height was measured at three locations using GPS Stations. At these locations samples of sea ice were taken for geophysical, oceanographic and biological analysis. Water samples were also taken.
Sea ice thickness (surface elevation and draft of sea ice) and surface reflectance was measured along ten North-South oriented profiles and eight east-west oriented profiles. This was performed by the HEM bird and the ground measurements validate these results.

Geographic Coverage
 N: -76.9648 S: -78.0665  E: 167.2763  W: 163.1832
 Min Altitude: 20  Max Altitude: 360
 N: -77.5667 S: -77.8742  E: 166.8  W: 164.8
 Min Altitude: 0  Max Altitude: 0  Min Depth: 0  Max Depth: 0
 N: -77.03 S: -78.0411  E: 167.4819  W: 163.6446
 Min Altitude: 0  Max Altitude: 0  Min Depth: 0  Max Depth: 0
 N: -77.6667 S: -77.8742  E: 166.5  W: 165.3333
 Min Altitude: 0  Max Altitude: 0  Min Depth: 0  Max Depth: 0

Temporal Coverage
Start Date: 2009-10-31
Stop Date: 2009-11-26

Start Date: 2011-11-20
Stop Date: 2011-12-05


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > MCMURDO ICE SHELF
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >SEA ICE >ICE DEPTH/THICKNESS    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS    [Definition]
OCEANS >OCEAN TEMPERATURE    [Definition]
OCEANS >TIDES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >OXYGEN ISOTOPES    [Definition]
OCEANS >SEA ICE >SNOW DEPTH    [Definition]
CRYOSPHERE >SEA ICE >SALINITY    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ABLATION ZONES/ACCUMULATION ZONES    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER MASS BALANCE/ICE SHEET MASS BALANCE    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
OCEANS


Platform
HELICOPTER    [Information]
FIELD SURVEYS    [Information]
SV >Snow Vehicle    [Information]
HAGGLUND >NZAP Hagglund Oversnow Vehicle    [Information]
FIELD INVESTIGATION    [Information]
UAV >Unmanned Aerial Vehicle    [Information]


Instrument
ALTIMETERS    [Information]
CORING DEVICES    [Information]
CTD >Conductivity, Temperature, Depth    [Information]
GPS >Global Positioning System    [Information]
GPR >Ground Penetrating Radar    [Information]
CAMERA
EMIS >ELECTROMAGNETIC INDUCTION SENSORS


Quality
The data is all held by the investigator at Gateway Antarctica, University of Canterbury,University of Otago, University of AlbertaCentral Data Archive University of Canterbury. Please contact to get more information.


Data Set Progress
IN WORK


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
WOLFGANG RACK
Role: INVESTIGATOR
Phone: +64 3 364 3166
Fax: +64 3 364 2197
Email: wolfgang.rack at canterbury.ac.nz
Contact Address:
Gateway Antarctica
University of Canterbury
Private Bag 4800
City: Christchurch
Country: New Zealand


PAT J LANGHORNE
Role: INVESTIGATOR
Phone: +64 3 479 7787
Fax: +64 3 479 0964
Email: pjl at physics.otago.ac.nz
Contact Address:
Department of Physics
University of Otago
PO BOX 56
City: Dunedin
Postal Code: 9054
Country: New Zealand


CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand



Creation and Review Dates
DIF Creation Date: 2009-06-19
Last DIF Revision Date: 2012-05-31

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