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

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

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

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

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

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

Metadata_Reference_Information:

Metadata_Date: 20070605

Metadata_Review_Date: 20080410

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: DAVE 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