Measurements of the physical properties of Antarctic fast ice and their variations throughout the growth season
Entry ID: K213_1986_1987_NZ_1

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Summary
Abstract: The physical properties of Antarctic fast ice were investigated throughout a full year of growth. The aim of the project was three fold; 1) to document the basic physical properties of Antarctic fast ice (salinity, temperature, crystal structure, brine volume, sub ice platelet thickness, ice thickness and snow cover depth and density) and their variations throughout the growth season, 2) to measure the energy fluxes associated with ice growth over the same period in order to assess the applicability of thermodynamic ice growth models developed for the Arctic to Antarctica sea ice and 3) to measure the nature and magnitude of propagating flexural gravity waves in the ice. Almost all of the measurements were conducted on second year ice at a site roughly 1.5km directly offshore from Scott Base. Several transects were made in late winter and spring in which the ice, snow and sub ice platelet thicknesses were measured over a much greater area. Micro-meteorological data was collected including in-ice temperature profiles, net radiation, wind direction and two levels of each wind speed, air temperature and humidity. Strain gauges were installed at the site over water 290 m deep. Three gauges were bolted to the ice surface in a rosette pattern, at 120 degree angles. This pattern enables not only the strain experienced by individual gauges to be recorded, but allows the maximum strain in the horizontal plain and the direction of wave propagation to be determined as well.

Related URL
Link: GET DATA
Description: The online link to Greg Crockers PhD thesis at the University of Cambridge, UK.


Geographic Coverage
 N: -77.85 S: -77.85  E: 166.6667  W: 166.6667

Temporal Coverage
Start Date: 1986-01-20
Stop Date: 1986-10-29


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > MCMURDO SOUND
GEOGRAPHIC REGION > POLAR


Science Keywords
OCEANS >OCEAN WAVES >GRAVITY WAVES    [Definition]
OCEANS >SEA ICE >ICE DEPTH/THICKNESS    [Definition]
OCEANS >SEA ICE >ICE GROWTH/MELT    [Definition]
OCEANS >SEA ICE >ICE TEMPERATURE    [Definition]
OCEANS >SEA ICE >SNOW DEPTH    [Definition]
OCEANS >SEA ICE >SALINITY    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ICEBERGS    [Definition]


ISO Topic Category
OCEANS


Platform
FIELD SURVEYS    [Information]
FIELD INVESTIGATION    [Information]


Instrument
STRAIN METER    [Information]


Data Set Progress
COMPLETE


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
GREG CROCKER
Role: INVESTIGATOR
Fax: +01 613 531 3675
Email: ballicater at sympatico.ca
Contact Address:
Ballicater Consulting Ltd
49 Kensington Ave
City: Kingston
Province or State: Ontario
Postal Code: K7L 4B4
Country: CANADA


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


Publications/References
Crocker, G.B. Wadhams, P. 1988 Observations of wind-generated waves in Antarctic fast ice. Journal of physical oceanography 18(9): 1292-1299

Crocker, G.B. 1988 Studies of McMurdo Sound fast ice. New Zealand Antarctic record 8(2): 20-25

Crocker, G.B. Wadhams, P. 1989 Breakup of Antarctic fast ice. Cold regions science and technology 17: 61-76

Crocker, G.B. Wadhams, P. 1989 Modelling Antarctic fast-ice growth. Journal of glaciology 35(119): 3-8

Crocker, G. B. 1988. Physical processes in Antarctic landfast sea ice, PhD thesis, University of Cambridge, England.

Creation and Review Dates
DIF Creation Date: 2009-06-19
Last DIF Revision Date: 2009-06-22

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