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Data Set ID:
NSIDC-0299

Snow and Firn Permeability: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation, Version 1

This data set contains firn physical properties measured in two meter snow pits and from deeper, 12- to 30-meter firn cores. The physical properties measured in the snow pits include density, permeability and microstructure (grain size and pore size). The physical properties measured on firn cores include density, permeability, diffusivity and microstructure. Data are available in Microsoft Excel format and ADOBE PDF and are available via FTP.

Geographic Coverage

Parameter(s):
  • Glaciers/Ice Sheets > Firn
  • Glaciers/Ice Sheets
  • Snow/Ice > Snow Density
  • Snow/Ice
  • Snow/Ice > Snow/Ice Temperature
Spatial Coverage:
  • N: -80.5304, S: -80.7802, E: 126.0302, W: 124.0218

Spatial Resolution: Not Specified
Temporal Coverage:
  • 4 January 2004 to 20 January 2004
Temporal Resolution: Not specified
Data Format(s):
  • PDF
  • Microsoft Excel
Platform(s) Not specified
Sensor(s): Not specified
Version: V1
Data Contributor(s): Mary Albert, Zoe Courville, Mac Cathles
Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Albert, M. R., Z. Courville, and M. Cathles. 2007. Snow and Firn Permeability: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5639MPD. [Date Accessed].

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Detailed Data Description

Format

Data files are in Microsoft Excel format viewable with spreadsheet software and an Adobe Acrobat PDF.

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File Naming Convention

Files are named according to the following convention.

File name File Size Description
.xls
340 KB Microsoft Excel File
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Volume

The data set is approximately 340 KB.

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Spatial Coverage

Southernmost Latitude: 80.7802° S
Northernmost Latitude: 80.5304° S
Westernmost Longitude: 124.0218° E
Easternmost Longitude: 126.0302° E 
Elevation: 2900 m

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Parameter or Variable

Parameter Description

The measured parameters are snow density, permeability, microstructure and thermal conductivity.

Sample Data Record

The data below are the first 10 data samples showing density data.

depth
pit1
pit2
pit3
1.5
0.42
0.36
0.25
4.5
0.27
0.42
0.36
7.5
0.41
0.48
0.28
10.5
0.31
0.44
0.36
13.5
0.36
0.39
0.41
16.5
0.35
0.4
0.43
19.5
0.3
0.39
0.41
22.5
0.3
0.39
0.36
25.5
0.43
0.38
0.29
28.5
0.48
0.42
0.38
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Software and Tools

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Data Acquisition and Processing

Data Acquisition Methods

Locations: 
Pit 1 80.77914° S, 124.28796° E 
Pit 2 80.7901° S, 124.4345° E 
Pit 3 80.7754° S, 124.526° E

Density in densdata.xls, taken using 100cc boxcutter and spring scale depth (cm) at center of sample, density (g/cc)
Dates: pit 1 Jan 07 04, pit 2 Jan 11 04, pit 3 Jan 16 04

Permeability in permdata.xls, measured using CRREL permeameter depth (cm) at center of sample, permeability (x 10-10 m2)
Dates: pit 1 Jan 09 04, pit 2 Jan 12 04, pit 3 Jan 17 04

Microstructure in msdata.xls, done following method of Perla (1989) depth (cm), center of sample, grain size, pore size (mm) 
Dates: pit 1 Jan 08 04, pit 2 Jan 11 04, pit 3 Jan 17 04

Thermal conductivity in thcdata.xls, measured in lab using transient needle probe depth (cm) at center of sample, thermal conductivity, W m-1 K-1, samples collected Jan 07-16 04

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Sensor or Instrument Description

The custom designed permeameter draws air through the sample, and measures the pressure drop and flow rate through the sample.

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References and Related Publications

Contacts and Acknowledgments

Mary Albert
Cold Regions Research and Engineering Laboratory
72 Lyme Road
Hanover, New Hampshire
USA 03755-1290 

Zoe Courville 
Cold Regions Research and Engineering Laboratory
72 Lyme Road
Hanover, New Hampshire
USA 03755-1290

Lawrence Cathles 
University of Chicago 
Department of the Geophysical Sciences
5734 S. Ellis Avenue
Chicago, Illinois 60637 USA 

Acknowledgments: 

This research was supported by National Science Foundation (NSF) Office of Polar Programs (OPP) grant 0125276 awarded to M. Albert.

Document Information

Document Creation Date

November 2007

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