Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice

Water depth measurements were taken in Long Fjord during early winter in 2007. The measurements were collected by Graham Cook, station leader at Davis Station in the Australian Antarctic Territory. The measurements were made by dropping a weighted line off the back of a quad bike, after drilling a hole through the sea ice. Measurements were made approximately every 100 metres.


The download file contains a csv spreadsheet which lists each waypoint, plus the corresponding water depth and any comments. The text file contains the waypoint information collected by the Garmin GPS unit. Data in the text file are comma separated and are interpreted as follows:


WP,D,001 (waypoint) , -68.51341000, 78.06903000,(Latitude and Longitude) 05/25/2007, 10:25:35, (Date and time Downloaded to Computer) 24-MAY-07 11:40:42 (Date and time of reading). Time is in local time.


Vegetation was found on the weight that we used when we first started at the seaward end of the Fjord and then again in shallow water between Brookes Hut and a small island 800 or 900 metres out from Brookes. The weight is quite smooth and does not pick up a lot.


The reference given below provides some further information about previously collected bathymetry data in Long Fjord. Furthermore, also see the metadata records:


'Bathymetric data of Long and Tryne Fjords at Vestfold Hills, Antarctica, collected in December 1999 [VH_bathy_99]'


'Interpolated bathymetry of Long and Tryne Fjords, Vestfold Hills, Antarctica [long_tryne_bathy]'


The fields in this dataset are:

Waypoint

Latitude

Longitude

Water Depth

Date

Time

Simple

Identification info

Alternate title
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice
Date (Publication)
2006-07-05
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:10.4225/15/55CAC8B94EB3D

Originator

Gibson, J.A.E. and Cook, G.

Publisher

Australian Antarctic Data Centre

Principal investigator

GIBSON, JOHN A.E.
IASOS
Private Bag 77
University of Tasmania
Hobart
Tasmania
7001
Australia

Collaborator

COOK, GRAHAM
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Name
CAASM Metadata
Website
https://data.aad.gov.au/metadata/records/Long_Fjord_Depth_Measurements_2007

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

Spatial resolution

Vertical sampling distance
0.30
Topic category
  • Inland waters
  • Oceans

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2007-05-24 2007-05-24

Extent

Description
Vertical Extent - Depth

Vertical element

Minimum value
4.1
Maximum value
141.5
Identifier
urn:x-ogc:def:cs:EPSG:6498
Name
Vertical CS. Axis: depth (D). Orientation: down. UoM: m.
Identifier
urn:x-ogc:def:axis:EPSG:113
Name
depth
Title
Paleodepth determination from Antarctic benthic diatom assemblages
Date (Publication)
1997
Citation identifier
29

Author

Whitehead, J., McMinn, A.
Name
Marine Micropaleontology
Issue identification
3-4
Page
301-318
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > BIOSPHERE > VEGETATION
  • EARTH SCIENCE > CRYOSPHERE > SEA ICE
  • EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
  • EARTH SCIENCE > OCEANS > COASTAL PROCESSES > FJORDS
  • EARTH SCIENCE > OCEANS > MARINE SEDIMENTS
  • EARTH SCIENCE > OCEANS > SEA ICE
  • EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Keywords
  • Water Depth
  • Long Fjord
  • bathymetry
  • sea ice
  • drilling
  • Waypoint
  • Latitude
  • Longitude
  • Date
  • Time
NASA/GCMD Earth Science Keywords
  • GPS > Global Positioning System
NASA/GCMD Earth Science Keywords
  • FIELD SURVEYS
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • CEOS
  • AMD
NASA/GCMD Earth Science Keywords
  • OCEAN > SOUTHERN OCEAN
  • CONTINENT > ANTARCTICA > Vestfold Hills
  • CONTINENT > ANTARCTICA > Long Fjord
  • GEOGRAPHIC REGION > POLAR

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are accessible from the provided URL. The download file contains an excel spreadsheet of water depths and waypoints, a text file with waypoint latitudes, longitudes, date and time, and several photos of the process.

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=Long_Fjord_Depth_Measurements_2007 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
2006-07-05T00:00:00
Units of distribution
MB
Transfer size
2.6
Distribution format
  • csv, text, jpeg

OnLine resource
EXTENDED METADATA

Bathymetric data of Long and Tryne Fjords at Vestfold Hills, Antarctica, collected in December 1999

OnLine resource
EXTENDED METADATA

Interpolated bathymetry of Long and Tryne Fjords, Vestfold Hills, Antarctica

OnLine resource
GET DATA

Download point for the data - excel spreadsheet, text file

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset

Resource lineage

Statement
Methodology: A line reel was rigged up to sit on the back a quad (see picture in download file) to allow measurements to be taken without the need to touch the wet cord (a problem, even for gloved hands, in sub-zero temperatures). The measuring cord is nylon blind cord marked every metre with red heat shrink and then every ten metres with yellow heat shrink. There is some stretch in the cord but not much, (roughly 300mm over 100 metres with about 10kg of weight applied). Two weights were made up, one at 2 kg and one a little over 4 kg (the hope was to be able to use the lighter weight to reduce line stretch, but it may be affected more by currents, and cause the line to drift). A gen-set was also available on the quad bike and was used to power a drill for making holes in the sea ice. In total, 60 holes were drilled at 100 metre intervals (using the odometer on the quad bike), and the location of each hole was recorded on a GPS. The line was then dropped, any slack was taken up and the bottom established before taking the measurement. The time was also recorded in case tidal variations need to be checked. We followed the travel routes up the Fjord to Brookes Hut taking cross measurements every 500 metres. The setup worked well and took about 2 to 4 minutes per hole depending on water depth. Water depths varied from 3.6 metres between islands to 141.6 metres out from the entrance to the Fjord. There was very little sediment coming up with the weight and what did come up was either dark green vegetation or grey silt. GPS measurements were collected using the WGS84 horizontal datum.
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2015-08-12 - record updated by Dave Connell to correct download URL. 2019-04-09 - record updated by Dave Connell for ISO compliance.

Metadata

Metadata identifier
string/Long_Fjord_Depth_Measurements_2007

Language
English
Character encoding
UTF8

Author

CONNELL, DAVE J.
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Sponsor

Australian Antarctic Division

Owner

AADC

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
669aed57-f3b1-41b7-b599-e1e77c8d7cc5

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2019-04-09T16:02:32

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/Long_Fjord_Depth_Measurements_2007

Point of truth for the metadata record

Date info (Creation)
2007-06-05T00:00:00
Date info (Last Update)
2019-04-09

Metadata standard

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

Overviews

Spatial extent

N
S
E
W


Keywords


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