Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice
Progress Code: completed 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...
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Australian Ocean Data Network
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Online Access: | https://researchdata.edu.au/bathymetrydepth-measurements-long-sea-ice/2822595 |
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ftands:oai:ands.org.au::2822595 2023-10-09T21:47:09+02:00 Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice Spatial: westlimit=78.06903; southlimit=-68.54131; eastlimit=78.18976; northlimit=-68.51341 Spatial: uplimit=141.5; downlimit=4.1 Temporal: From 2007-05-24 to 2007-05-24 https://researchdata.edu.au/bathymetrydepth-measurements-long-sea-ice/2822595 unknown Australian Ocean Data Network https://researchdata.edu.au/bathymetrydepth-measurements-long-sea-ice/2822595 Long_Fjord_Depth_Measurements_2007 Dataset DOI AU/AADC > Australian Antarctic Data Centre, Australia inlandWaters oceans EARTH SCIENCE > BIOSPHERE > VEGETATION CRYOSPHERE > SEA ICE OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH COASTAL PROCESSES > FJORDS MARINE SEDIMENTS BATHYMETRY Long Fjord drilling Waypoint Latitude Longitude Date Time GPS > Global Positioning System FIELD SURVEYS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA > Vestfold Hills dataset ftands 2023-09-18T22:50:01Z Progress Code: completed 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. 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 ... Dataset Antarc* Antarctic Antarctica Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean Vestfold Hills Australian Antarctic Territory Vestfold Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) Long Fjord ENVELOPE(78.333,78.333,-68.500,-68.500) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
inlandWaters oceans EARTH SCIENCE > BIOSPHERE > VEGETATION CRYOSPHERE > SEA ICE OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH COASTAL PROCESSES > FJORDS MARINE SEDIMENTS BATHYMETRY Long Fjord drilling Waypoint Latitude Longitude Date Time GPS > Global Positioning System FIELD SURVEYS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA > Vestfold Hills |
spellingShingle |
inlandWaters oceans EARTH SCIENCE > BIOSPHERE > VEGETATION CRYOSPHERE > SEA ICE OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH COASTAL PROCESSES > FJORDS MARINE SEDIMENTS BATHYMETRY Long Fjord drilling Waypoint Latitude Longitude Date Time GPS > Global Positioning System FIELD SURVEYS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA > Vestfold Hills Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
topic_facet |
inlandWaters oceans EARTH SCIENCE > BIOSPHERE > VEGETATION CRYOSPHERE > SEA ICE OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH COASTAL PROCESSES > FJORDS MARINE SEDIMENTS BATHYMETRY Long Fjord drilling Waypoint Latitude Longitude Date Time GPS > Global Positioning System FIELD SURVEYS AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN CONTINENT > ANTARCTICA > Vestfold Hills |
description |
Progress Code: completed 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. 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 ... |
format |
Dataset |
title |
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
title_short |
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
title_full |
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
title_fullStr |
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
title_full_unstemmed |
Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice |
title_sort |
bathymetry/depth measurements made at long fjord, vestfold hills by drilling through sea ice |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/bathymetrydepth-measurements-long-sea-ice/2822595 |
op_coverage |
Spatial: westlimit=78.06903; southlimit=-68.54131; eastlimit=78.18976; northlimit=-68.51341 Spatial: uplimit=141.5; downlimit=4.1 Temporal: From 2007-05-24 to 2007-05-24 |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(78.333,78.333,-68.500,-68.500) |
geographic |
Antarctic Southern Ocean Vestfold Hills Australian Antarctic Territory Vestfold Davis Station Davis-Station Long Fjord |
geographic_facet |
Antarctic Southern Ocean Vestfold Hills Australian Antarctic Territory Vestfold Davis Station Davis-Station Long Fjord |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/bathymetrydepth-measurements-long-sea-ice/2822595 Long_Fjord_Depth_Measurements_2007 Dataset DOI |
_version_ |
1779309978579894272 |