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

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Bathymetry/depth measurements made at Long Fjord, Vestfold Hills by drilling through sea ice
Description:
Abstract:
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
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Whitehead, J., McMinn, A. (1997) Paleodepth determination from Antarctic benthic diatom assemblages Marine Micropaleontology 29(3-4). 301-318
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20070524
Ending_Date: 20070524
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 78.06903
East_Bounding_Coordinate: 78.18976
North_Bounding_Coordinate: -68.51341
South_Bounding_Coordinate: -68.54131
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > VEGETATION
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE
Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES > FJORDS
Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE
Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM
Theme_Keyword: Long Fjord
Theme_Keyword: Water Depth
Theme_Keyword: Bathymetry
Theme_Keyword: Sea Ice
Theme_Keyword: Drilling
Theme_Keyword: Waypoint
Theme_Keyword: Latitude
Theme_Keyword: Longitude
Theme_Keyword: Date
Theme_Keyword: Time
Theme_Keyword: INLAND WATERS
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > SOUTHERN OCEAN
Place_Keyword: CONTINENT > ANTARCTICA > VESTFOLD HILLS
Place_Keyword: CONTINENT > ANTARCTICA > LONG FJORD
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: These data are accessible from the URL given below. 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.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). The investigator, technical contact and data centre must be acknowledged when using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GRAHAM COOK
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Electronic_Mail_Address: graham.cook@aad.gov.au
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: 30 cm
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: 30 cm
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: Long_Fjord_Depth_Measurements_2007
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: csv, text, jpeg
Transfer_Size: 2.6 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/index.cfm?file_...
Access_Instructions:
Download point for the data - excel spreadsheet, text file
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://gcmd.nasa.gov/getdif.htm?VH_bathy_99
Access_Instructions:
Bathymetric data of Long and Tryne Fjords at Vestfold Hills, Antarctica, collected in December 1999
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://gcmd.nasa.gov/getdif.htm?long_tryne_bathy
Access_Instructions:
Interpolated bathymetry of Long and Tryne Fjords, Vestfold Hills, Antarctica
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset
Fees: Free
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Metadata_Reference_Information:
Metadata_Date: 20070605
Metadata_Review_Date: 20140911
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: DAVE J. CONNELL
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: dave.connell@aad.gov.au
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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