Temperature, salinity and current turbulence along an east to west transect across McMurdo Sound
Entry ID: K131_2007_2010_NZ_1

[ Update this Record ]

Summary
Abstract: The oceanography of McMurdo Sound was investigated by collecting current meter data, water samples, ice cores, under ice turbulence and Conductivity (salinity)-Temperature-Depth (CTD) profiles of the full depth of the water column were collected along an east to west transect across the sound. At each site, approximately 5 kms apart, a hole was drilled in the ice, observations of temperature, salinity and current turbulence were recorded. Two fixed moorings were deployed at each end of the traverse line for the period of the traverse to provide reference points for the oceanographic observations. Isotope measurements were taken from water samples collected from 10m and 200m at each transect site. Additional cores were sectioned and viewed under cross-polarised light in order to determine the ice structure. It is intended that the research carried out here will in time be able to be applied to a much wider Antarctic marine environment and consequently lead to a greater understanding of the relationship between the sea ice and the underlying ocean. The CTD profiles will be used to describe the water column structure of the sound and to investigate spatial variability in distribution of water masses, particularly Ice Shelf Water (ISW). Comparison with platelet ice abundance measurements from ice cores collected from the same sites will help to identify a causal link between flow of ISW, formation of frazil ice in the water column, and deposition of platelet ice as a method of sea-ice growth.

To characterise the relationship between the sea ice, ocean and atmosphere of Antarctica ice cores and water samples were taken in order to better understand and predict high-latitude coupled climate variability, and to underpin the management of Antarctica and the Southern Ocean in the context of the global climate system. It concentrates on the climate-related processes occurring within McMurdo Sound to the marginal ice zone. It covers a range of scales, from microns in structure of sea ice, to the order of thousands of kilometres in the process of sea ice dispersal in the Southern Ocean, and the relationships linking Antarctica to global climate variability and change.Ice core, water

Related URL
Link: VIEW RELATED INFORMATION
Description: Antarctic Fast ice Network IPY proposal


Geographic Coverage
 N: -77.5833 S: -77.8667  E: 167.0  W: 164.0
 Min Depth: 0  Max Depth: 600
 N: -77.7 S: -77.8833  E: 166.73  W: 166.3333
 Min Depth: 0  Max Depth: 500
 N: -77.79228 S: -77.883934  E: 166.79053  W: 166.50166
 Min Depth: 0M  Max Depth: 500M

Temporal Coverage
Start Date: 2007-11-11
Stop Date: 2007-12-11

Start Date: 2008-09-07
Stop Date: 2008-10-08

Start Date: 2010-11-12
Stop Date: 2011-02-08


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > NEW HARBOUR
GEOGRAPHIC REGION > POLAR
CONTINENT > ANTARCTICA > ROSS ISLAND


Science Keywords
CRYOSPHERE >SEA ICE >ICE DEFORMATION    [Definition]
CRYOSPHERE >SEA ICE >ICE DEPTH/THICKNESS    [Definition]
CRYOSPHERE >SEA ICE >ICE GROWTH/MELT    [Definition]
CRYOSPHERE >SEA ICE >ICE TEMPERATURE    [Definition]
CRYOSPHERE >SEA ICE >ICE TYPES    [Definition]
OCEANS >OCEAN CIRCULATION >ADVECTION    [Definition]
OCEANS >OCEAN CIRCULATION >BUOY POSITION    [Definition]
OCEANS >OCEAN CIRCULATION >DIFFUSION    [Definition]
OCEANS >OCEAN CIRCULATION >OCEAN CURRENTS    [Definition]
OCEANS >OCEAN CIRCULATION >OCEAN MIXED LAYER    [Definition]
OCEANS >OCEAN CIRCULATION >TURBULENCE    [Definition]
OCEANS >OCEAN TEMPERATURE >OCEAN MIXED LAYER    [Definition]
OCEANS >OCEAN TEMPERATURE >THERMOCLINE    [Definition]
OCEANS >OCEAN TEMPERATURE >WATER TEMPERATURE    [Definition]
OCEANS >SALINITY/DENSITY >CONDUCTIVITY    [Definition]
OCEANS >SALINITY/DENSITY >DENSITY    [Definition]
OCEANS >SALINITY/DENSITY >PYCNOCLINE    [Definition]
OCEANS >SALINITY/DENSITY >SALINITY    [Definition]
OCEANS >SALINITY/DENSITY    [Definition]


ISO Topic Category
OCEANS


Platform
FIELD SURVEYS    [Information]
FIELD INVESTIGATION    [Information]


Instrument
CORING DEVICES    [Information]
CTD >Conductivity, Temperature, Depth    [Information]
CURRENT METERS    [Information]
SURVEYING TOOLS
GPS >Global Positioning System    [Information]


Project
IPY >INTERNATIONAL POLAR YEAR    [Information]


Quality
The water column data is held by NIWA in machine readable form. Please contact Mike Williams: m.williams@niwa.co.nz
Sea ice data is held at the University of Otago. Some data in machine readable form, most in lab note books or photographic images. Please contact Pat Langhorne: pjl@physics.otago.ac.nz

Please contact the investigators for more information.


Keywords
OCEANOGRAPHY
SEA ICE
WATER COLUMN


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: CAROLINE MACLAURIN
Phone: (03) 358 0200
Fax: (03) 358 0211
Email: c.maclaurin at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch 8140
Country: New Zealand


Personnel
TIM HASKELL
Role: INVESTIGATOR
Phone: +64 4 931 3000
Fax: +64 4 931 3754
Email: t.haskell at irl.cri.nz
Contact Address:
Industrial Research Ltd.
Gracefield Road
PO BOX 31310
City: Lower Hutt
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


Publications/References
Dempsey, D.E., Langhorne, P.J., Robinson, N.J., Williams, M.J.M., Haskell, T.G. and Frew, R.D. 2010. Observation and modelling of platelet ice fabric in McMurdo Sound, Antarctica. Journal of Geophysical Research 115: CO1007, doi: 10.1029/2008JC005264.

Robinson, N. 2008 Heartbeat of the global ocean: Antarctic sea ice and the climate system. New Zealand science teacher 118: 20-22.

Stevens, C.L., Robinson, N.J., Williams, M.J.M., Haskell, T.G. 2009. Observations of turbulence beneath sea ice in southern McMurdo Sound,
Antarctica. Ocean science 5: 435-445.

Creation and Review Dates
DIF Creation Date: 2009-02-11
Last DIF Revision Date: 2012-05-31

[ Update this Record ]


Link to Web Site