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Data Set ID:
NSIDC-0628

Continuous, Ultra-high Resolution WAIS-Divide Ice Core Methane Record 9.8-67.2 ka BP, Version 1

This data set contains methane concentrations from a West Antarctic Ice Sheet (WAIS) Divide ice core obtained by an online, continuous technique (Stowasser, et al. 2012).

Geographic Coverage

Parameter(s):
  • Ice Core Records > Methane
Spatial Coverage:
  • N: -79.28, S: -79.28, E: -112.05, W: -112.05

Spatial Resolution: Not Specified
Temporal Coverage: Not specified
Temporal Resolution: 2 year
Data Format(s):
  • Microsoft Excel
  • ASCII Text
Platform(s) Laboratory
Sensor(s): INFRARED LASER SPECTROSCOPY
Version: V1
Data Contributor(s): Edward Brook, Joseph McConnell, Rachel Rhodes
Please contact the data provider for the correct Data Citation for this data set.

Literature Citation

As a condition of using these data, we request that you acknowledge the author(s) of this data set by referencing the following peer-reviewed publication.

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These data are ultra-high temporal resolution methane concentrations from a West Antarctic Ice Sheet (WAIS) Divide ice core obtained by an online, continuous technique (Stowasser, et al. 2012).

Detailed Data Description

This data set contains methane concentrations for the Last Glacial Period and the deglacial transition from the WAID Divide ice core. The concentrations were determined through a continuous measurement technique (Stowasser, et al. 2012).

Format

Data are in both Microsoft Excel (.xlsx) format and comma-delimited ASCII (.txt)

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File and Directory Structure

Data are available on the FTP site in theftp://sidads.colorado.edu/pub/DATASETS/AGDC/nsidc0628_rhodes/ directory. Within this directory, there are two files: Rhodes_Science_2015_WD_CH4_noaa-wdc-paleo.txt and Rhodes_Science_2015_WD_CH4_noaa-wdc-paleo.xlsx. Both files contain the same data and information.

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File Size

The Microsoft Excel (.xlsx) file is 1,013 KB, and the ASCII (.txt) file is 781 KB.

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Spatial Coverage

WAIS Divide, Antarctica: latitude 79°28.058' S; longitude: 112°05.189' W

Spatial Resolution

Elevation: 3465 m

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Temporal Coverage

Data cover from 67.2 to 9.8 ka B. P. (calendar year BP where 1950 is present).

Temporal Resolution

Data are provided at two year intervals.

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Parameter or Variable

Methane (CH4)

Sample Data Record

Refer to Figure 1 for an example of the data.

sample data
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Software and Tools

Software and Tools

The data can be accessed using Microsoft Excel (.xlsx file) or any text editor (.txt file).

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Data Acquisition and Processing

Data Acquisition Methods

The data are from a 1,714 m section of the West Antarctic Ice Sheet (WAIS) Divide ice core, which was analyzed using three different laser spectrometers during two laboratory campaigns of 2-3 months duration each in early 2012 (core section from 1804-2621 m) and 2013 (core section 2709-3404 m). Figure 2 shows the resultant analyses of the ice core sections. Refer to Rhodes et al. 2015 for more information on the methods and analyses of the data, and see Table S1 in the supplementary documentation of the paper for precision, accuracy, and time/depth resolution information.

analyses

Figure 2. Ice Core Analyses

Processing Steps

These concentrations were obtained by an online, continuous technique (Stowasser, et al. 2012). Data provided are cubic smoothing spline fit at two year spacing to the raw time-integrated data.

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References and Related Publications

Contacts and Acknowledgments

Dr. Edward J. Brook
Oregon State University
College of Earth, Ocean, and Atmospheric Sciences
104 CEOAS Administration
Corvalis, OR 97331

Joseph R. McConnell
Desert Research Institute
Division of Hydrologic Sciences
2215 Raggio Parkway
Reno, NV 89512

Rachael H. Rhodes
Oregon State University
College of Earth, Ocean, and Atmospheric Sciences
104 CEOAS Administration
Corvalis, OR 97331

Acknowledgments: 

This research was funded by National Science Foundation (NSF) grant numbers 1043518, 1142041, 0944552, 0839093, and 1142166.

Document Information

DOCUMENT CREATION DATE

17 July 2015

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