This data set includes raw dust microparticle data for the WAIS Divide deep core, WDC06A, from the surface to 577 m. Data were collected in 2010 using a Klotz Abakus laser particle counter connected to a continuous ice core melter system at the University of Maine (Breton et al., 2012).
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WAIS Divide Microparticle Concentration and Size Distribution, 0-2400 ka, Version 1
Geographic Coverage
Spatial Coverage: |
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Spatial Resolution: | Not Specified |
Temporal Coverage: |
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Temporal Resolution: | Not specified |
Parameter(s): |
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Platform(s) | LABORATORY |
Sensor(s): | PARTICLE DETECTORS |
Data Format(s): |
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Version: | V1 |
Data Contributor(s): | Karl Kreutz, Bess Koffman |
Metadata XML: | View Metadata Record |
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.
Kreutz, K. and B. G. Koffman. 2015. WAIS Divide Microparticle Concentration and Size Distribution, 0-2400 ka, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5KK98QZ. [Date Accessed].Detailed Data Description
This data set includes raw dust microparticle data for the WAIS Divide deep core, WDC06A, from the surface to 577 m. Data were collected in 2010 using a Klotz Abakus laser particle counter connected to a continuous ice core melter system at the University of Maine.
Data are in tab-delimited ASCII text (.txt
) format.
Data are available on the FTP site in the ftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0616_kreutz
directory. Within this directory, there is one file: wdc06A_dust_conc_all_channels.txt
.
The text file does not contain column header information. The columns are as follows:
Column |
Description |
---|---|
1 | Depth (m; top and bottom depths for each tube are from NICL database) |
2 | Age (WDC06A-7 timescale; years reported as decimal years) |
3 through 32 |
Concentrations of particles, in units of particles per mL of water, in each bin |
33 | Total particle concentration (all bins), in units of particles per mL of water |
The file size is 270 MB.
The spatial coverage is WAIS Divide, Antarctica: Latitude 79°28' S; Longitude 112°5' W.
Spatial Resolution
The spatial resolution is 1 cm in ice; ~2 cm in low-density firn.
The Paleo temporal coverage is 2,400 B.P. to present. Data were collected from 01 May 2010 through 31 December 2010
Temporal Resolution
The temporal resolution is ~200 measurements per year.
Microparticle Concentration
Ice Core Record
Software and Tools
The data can be accessed using any text editor.
Data Acquisition and Processing
Data were collected in 2010 using a Klotz Abakus laser particle counter connected to a continuous ice core melter system at the University of Maine.
Particles were measured in 30 channels spanning 1-15 μm diameter; data are reported as the number of particles per ml of melt water from the melted piece of core. While data are reported once per second, the effective resolution of our system is ~2 cm in low-density firn and 1 cm in glacial ice. Lower bin diameters are listed below, such that the first bin contains particles with diameters 1.0-1.1 μm, the second bin contains particles 1.1-1.2 μm diameter, and so on. The upper limit of the last bin is 15 μm. Zero (0) implies a concentration of 0; NaN implies no measurement. Note that the lower 2-3 bins likely contain additional particle counts related to particles below 1.0 μm diameter (we infer this based on particle size distribution curves). Data have been linearly interpolated to even temporal spacing.
These are the diameters of the lower bin edge for all bins: d_lower_wsd = [1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.7,2.9,3.2,3.6,4.0,4.5,5.1,5.7,6.4,7.2,8.1,9.0,10.0,12.0]
References and Related Publications
Contacts and Acknowledgments
Dr. Karl Kreutz
University of Maine
236 Sawyer Hall
Orono, Maine 04469
Dr. Bess Koffman
Lamont-Doherty Earth Observatory
Columbia University
61 Route 9W
Palisades, New York 10964
This research was funded by National Science Foundation (NSF) Office of Polar Programs (OPP) grant number 0636740.
Document Information
DOCUMENT CREATION DATE
30 April 2015
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