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Snow accumulation rate data: LGB traverses 1989-95
Entry ID: LGB_Acc_traverse


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Summary
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All logbooks have been archived at the Australian Antarctic Division.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.

Related URL
Link: GET DATA
Description: Download point for the data


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 3


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 2216


Link: VIEW RELATED INFORMATION
Description: Download point for the catalogue information for the logbooks


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


Geographic Coverage
 N: -69.0 S: -77.0  E: 78.0  W: 54.0

Temporal Coverage
Start Date: 1995-02-28
Stop Date: 1998-11-01


Location Keywords
CONTINENT > ANTARCTICA > Lambert Glacier
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIERS    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
INLAND WATERS


Platform
FIELD SURVEYS    [Information]


Quality
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.


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_... when using these data.


Keywords
ANTARCTICA
CANE
DELTA OXYGEN-18
DENSITY
DEPTH HOAR
DISTANCE
ELEVATION
GLACIER
GRAIN SIZE
HEIGHT
ICE CRUSTS
LATITUDE
LONGITUDE
MASS ACCUMULATION
SNOW
SNOW ACCUMULATION
YEAR


Data Set Progress
COMPLETE


Originating Center
AAD


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 10088 KB
Fees: free


Personnel
IAN ALLISON
Role: TECHNICAL CONTACT
Role: INVESTIGATOR
Phone: +61 3 6226 7648
Fax: +61 3 6226 7650
Email: ian.allison at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Creation and Review Dates
DIF Creation Date: 1999-10-07
Last DIF Revision Date: 2016-11-18


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