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Data Set ID:
NSIDC-0139

Roosevelt Island Ice Core Density and Beta Count Data, Version 1

This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome within the Ross Ice Shelf, and were measured at increasing depth for density in kilograms per cubic meter, and for beta counts per hour per kilogram.

The data were collected between November and December of 1997. Measurements were taken incrementally down to approximately 17 meters for each of the three cores. Data are available in text format via ftp.

Geographic Coverage

Parameter(s):
  • Snow/Ice > Snow Density
  • Snow/Ice > Snow/Ice Chemistry
  • Erosion/Sedimentation > Stratigraphic Sequence > Snow Stratigraphy
Spatial Coverage:
  • N: -79.3889, S: -79.6167, E: -160.3833, W: -161.5667

Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 November 1997 to 31 December 1997
Temporal Resolution: Not specified
Data Format(s):
  • ASCII Text
Platform(s) GROUND STATIONS, GROUND-BASED OBSERVATIONS
Sensor(s): CORING DEVICES
Version: V1
Data Contributor(s): Howard Conway
Please contact the data provider for the correct Data Citation for this data set.

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Detailed Data Description

Format

Data are available in three text files.

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File Naming Convention

Each file is named according to the location of the core: a000.txt, a210.txt, aw35.txt.

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File Size

Each data file is 3 Kb.

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Spatial Coverage

Southernmost_Latitude: -79.6167 S
Northernmost_Latitude: -79.3889 S
Westernmost_Longitude: -161.5667 W
Easternmost_Longitude: -160.3833 W

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Temporal Coverage

Data were collected during November and December, 1997.

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Parameter or Variable

Parameter Description

Snow density and beta counts were measured at the University of New Hampshire.

Unit of Measurement

Snow density is measured in kilograms per cubic meter (kg/m3)
Beta counts are measured in counts per hour per kilogram (cts/hr/kg)

Parameter Range

Each parameter was measured to a depth of approximately 17 m. Generally, two measurements for each parameter were taken at each depth. (See the sample below.)

Sample Data Record

Depth Range (m) Dens (kg/m3) Beta (cts/hr/kg)
13.25 – 13.46 582 18
13.46 – 13.66 621 20.9
13.66 – 13.85 611 17.33
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Software and Tools

Cost

Data are available at no cost.

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Software and Tools

Most browsers and word processing applications can open text files. No special software or tools are necessary.

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Data Acquisition and Processing

Data Acquisition Methods

The firn cores were collected during the field season of 1997. The density and beta count measurements were taken by Jack Dibb at the University of New Hampshire.

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References and Related Publications

Contacts and Acknowledgments

Howard Conway, Research Professor, University of Washington

Document Information

Document Creation Date

2 May 2003

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