DC Conductivity of sea-ice measured during the SIPEX II voyage of the Aurora Australis, 2012

DC Electrical:


In order to relate the fluid permeability to the electrical properties of sea ice, we also took measurements of the vertical component of the DC electrical conductivity tensor of sea ice. Cores extending to the bottom of an ice floe were taken and laid out holder. With the exception of sites 7 and 8 where we encountered a slush layer below the hard ice and could not core down to the ocean. The core bottom was determined at sites 7 and 8 to be the ice slush interface. Immediately upon extraction, holes that fit our thermistor probes were drilled every ten centimetres and a temperature profile was taken. Subsequently, slightly larger holes were drilled which fit our electrical probes (stainless steel nails). An AEMC Earth Resistivity Meter was then used to measure the resistance over 10 cm sections of the core (usually offset by 5 cm so that the measured temperature was in the centre of the section where electrical resistance was measured).


The cores used in resistance measurements were taken very close to where the crystallographic cores were taken. In almost all cases the cores extracted for electrical measurements were also used for crystallographic analysis, so that there was an exact match of electrical properties with crystal structure. In such cases the DC electrical cores were then moved to a -20 degree C cold room for further processing immediately after measurements in the field.


A thin vertical section, approximately 3mm thick, was taken from each of the cores stored for analysis. These sections were placed between a pair of cross polarized plates and photographed. Each photo was labelled with the core and date it was taken, and was photographed with a meter stick alongside for scale.


After the thin sections were photographed, the remaining samples were melted to measure salinity. Some of the melted sea ice was saved for later O18 analysis to distinguish samples containing snow ice from those containing marine granular ice. The temperature and salinities we are then used to calculate brine volume fractions along the 10 cm sections of the core.


The DC conductivity data collected can be found in the Electrical tab of the Master_Core_List.xls Excel file. The raw data can be found in the scans of our field note books located in the folder named notebooks. In the spread sheet the measured resistances of the 10 cm sections, temperatures, salinities and corresponding brine volume fractions are listed per core.


For each core the supporting crystallography core number can be found in the crystallography column of the spread sheet. The photos of the crystallography cores can be found in the crystallography folder, separated into subfolders labelled with the site and core number, Each photo also contains a tag indicating the core number , site taken , date, and what depth range this covers. Tags may not contain a depth range for cores less than 1 meter. Please see the meter stick in each photo for scale.

Simple

Identification info

Alternate title
DC Conductivity of sea-ice measured during the SIPEX II voyage of the Aurora Australis, 2012
Date (Publication)
2019-07-23
Edition
1
Citation identifier
Dataset DOI

Title
Information and documentation - Digital object identifier system
Date (Publication)
2012-04-23
Citation identifier
ISO 26324:2012

Citation identifier
doi:10.26179/5d2822a76e150

Originator

Golden, K.M., Lubbers, D. and Sampson, C.

Publisher

Australian Antarctic Data Centre

Principal investigator

GOLDEN, KENNETH M
University of Utah
Department of Mathematics
155 S. 1400 E. JWB 233
Salt Lake City
Utah
84112-0090
USA

Principal investigator

LUBBERS, DAVID
University of Utah
Salt Lake City
Utah
84112-0090
USA

Principal investigator

SAMPSON, CHRISTIAN
University of Utah
Salt Lake City
Utah
84112-0090
USA

Collaborator

GOLDEN, KENNETH M
University of Utah
Department of Mathematics
155 S. 1400 E. JWB 233
Salt Lake City
Utah
84112-0090
USA

Collaborator

LUBBERS, DAVID
University of Utah
Salt Lake City
Utah
84112-0090
USA

Collaborator

SAMPSON, CHRISTIAN
University of Utah
Salt Lake City
Utah
84112-0090
USA
Name
CAASM Metadata
Website
https://data.aad.gov.au/metadata/records/SIPEX_II_Ice_Conductivity

Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Topic category
  • Oceans

Extent

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E
W


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E
W


N
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E
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Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2012-10-06 2012-10-06

Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2012-10-13 2012-10-13

Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2012-10-19 2012-10-19

Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2012-10-28 2012-10-28
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY
  • EARTH SCIENCE > CRYOSPHERE > SEA ICE
  • EARTH SCIENCE > OCEANS > SEA ICE
Keywords
  • SIPEX
  • Conductivity
NASA/GCMD Earth Science Keywords
  • CONDUCTIVITY METERS
NASA/GCMD Earth Science Keywords
  • R/V AA > R/V Aurora Australis
NASA/GCMD Earth Science Keywords
  • CEOS
  • AMD
  • AMD/AU
  • ACE/CRC
NASA/GCMD Earth Science Keywords
  • OCEAN > SOUTHERN OCEAN
  • CONTINENT > ANTARCTICA
  • GEOGRAPHIC REGION > POLAR

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are publicly available for download from the provided URL.

Resource constraints

File type
Portable Network Graphic
Linkage
Creative Commons by Attribution logo

Title
Attribution 4.0 International (CC BY 4.0)
Website
https://creativecommons.org/licenses/by/4.0/legalcode

Legal code for Creative Commons by Attribution 4.0 International license

Use constraints
licence
Other constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SIPEX_II_Ice_Conductivity when using these data.
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2019-07-23T00:00:00
Units of distribution
kb
Transfer size
76
Distribution format
  • Excel

OnLine resource
GET DATA

Download point for the data

OnLine resource
PROJECT HOME PAGE

Public information for ASAC project 4073

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset

Resource lineage

Statement
For the moment the spread sheet contains an ice type column which only allows for a statement of granular or columnar ice for each 10 cm section. At 10 cm resolution one can have a mix of the two. Exactly how we will quantify each section with a mix if ice types is yet to be determined and as such this data set will change as the photos are analysed in greater detail.
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2013-01-18 - record created by Dave Connell. 2019-07-12 - record updated by Dave Connell - basic updates. 2019-07-23 - record updated by Dave Connell to publicly release the data.

Metadata

Metadata identifier
string/SIPEX_II_Ice_Conductivity

Language
English
Character encoding
UTF8

Author

GOLDEN, KENNETH M
University of Utah
Department of Mathematics
155 S. 1400 E. JWB 233
Salt Lake City
Utah
84112-0090
USA

Sponsor

Australian Antarctic Division

Owner

AADC
Title
Parent Metadata Record
Citation identifier
SIPEX_II

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
248ab842-7c33-4024-8416-6b48afbea76a

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2019-07-23T10:26:41

Identifier

Description
metadata.extraction_date

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
8.6

Metadata linkage
http://data.aad.gov.au/metadata/records/SIPEX_II_Ice_Conductivity

Point of truth for the metadata record

Date info (Creation)
2013-01-17T00:00:00
Date info (Last Update)
2019-07-23

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

Overviews

Spatial extent

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W


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