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Snow accumulation rate data: LGB traverses 1989-95

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Snow accumulation rate data: LGB traverses 1989-95
Description:
Abstract:
The Lambert Glacier Basin (LGB) series of five oversnow traverses were conducted from 1989-95. Snow accumulation rate measurements were recorded every 2 km along the 2014 km main traverse track from LGB00 (68.6543 S, 61.1201 E) near Mawson Station to LGB72 (69.9209 S, 76.4933 E) near Davis Station, and at 7 selected sites around the basin where local accumulation cane farm gridded arrays were established. Raw data were manually recorded in field logbooks and later entered into spreadsheet files (MS Excel). Summary data (2 km spatial resolution) can be obtained from CRC Research Note No.09 'Surface mass balance and snow surface properties from the Lambert Glacier Basin Traverses 1990-94'. This work was completed as part of ASAC projects 3 and 2216. Some of this data have been stored in a very old format. The majority of files have been updated to current formats, but some files (kaleidograph files in particular) were not able to be modified due to a lack of appropriate software. However, these files are simply figures, and can be regenerated from the raw data (also provided). The fields in this dataset are: Latitude Longitude Height Cane Distance Elevation Density Mass Accumulation Year Delta Oxygen-18 Grain Size Ice Crusts Depth Hoar All logbooks have been archived at the Australian Antarctic Division. Copies of the document details forms for the logbooks is available for download from the provided URL.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19950228
Ending_Date: 19981101
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 54.0
East_Bounding_Coordinate: 78.0
North_Bounding_Coordinate: -69.0
South_Bounding_Coordinate: -77.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: Antarctica
Theme_Keyword: Cane
Theme_Keyword: Delta Oxygen-18
Theme_Keyword: Density
Theme_Keyword: Depth Hoar
Theme_Keyword: Distance
Theme_Keyword: Elevation
Theme_Keyword: Glacier
Theme_Keyword: Grain Size
Theme_Keyword: Height
Theme_Keyword: Ice Crusts
Theme_Keyword: Latitude
Theme_Keyword: Longitude
Theme_Keyword: Mass Accumulation
Theme_Keyword: Snow
Theme_Keyword: Snow Accumulation
Theme_Keyword: Year
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > LAMBERT GLACIER
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: The data are available from the url given below.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=LGB_Acc_traverse when using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: IAN ALLISON
Contact_Position: TECHNICAL CONTACT
Contact_Position: INVESTIGATOR
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 6226 7648
Contact_Facsimile_Telephone: +61 3 6226 7650
Contact_Electronic_Mail_Address: ian.allison@aad.gov.au
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Very few data gaps appeared in almost 1000 accumulation rate measurements along the 2014 km of traverse track, those that did occur were simply due to breakage loss of canes caused by the strong plateau winds. Snow accumulation data were obtained using an extensible tape measure to record the heights above the snow surface of the tops of bamboo accumulation-navigation canes and pairs of aluminium marker tags attached to them. Three measurements allowed a level of redundancy to compensate for cases where either the lower marker became buried beneath the snow surface, or one or other marker shifted with respect to the cane due to vibration in the continual plateau winds. Time, date, and geographic location were also recorded. At seven (7) selected sites around the basin, usually coinciding with locations of automatic weather station (AWS) installations, gridded arrays of accumulation canes were established to investigate the spatial variability of the local surface microrelief (sastrugi, dunes, ....). To convert snow layer thicknesses to annual surface accumulation rates densities were recorded, either as 1 m averaged values over the top metre of a 2 m shallow core (taken for oxygen isotope measurements), or from an 0.5 litre cylinder inserted horizontally into the firn some 10-20 cm below the snow surface. Accumulation canes have been measured every time a portion of the track has been established and revisited. Several annual cycles have been recorded throughout the program exhibiting broad agreement in accumulation trends around the basin. Geographic locations for which snow accumulation rates applied were navigational GPS (30-100 m accuracy) constrained to overnight LGB station geodetic GPS fixes (1-5 m horizontal) every 30 km along the traverse route. Since snow surface accumulation rates were in general only meaningful over large distances (30 km smoothing has been applied), any such minor inaccuracies in geographical positioning were largely irrelevant.
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:
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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: LGB_Acc_traverse
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 10088 KB
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/download_file.c...
Access_Instructions:
Download point for the data
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 3
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 2216
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the catalogue information for the logbooks
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: 19991007
Metadata_Review_Date: 20160127
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
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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