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).
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Continuous, Ultra-high Resolution WAIS-Divide Ice Core Methane Record 9.8-67.2 ka BP, Version 1
Geographic Coverage
Spatial Coverage: |
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---|---|
Spatial Resolution: | Not Specified |
Temporal Coverage: | Not specified |
Temporal Resolution: | 24 month |
Parameter(s): |
|
Platform(s) | Laboratory |
Sensor(s): | INFRARED LASER SPECTROSCOPY |
Data Format(s): |
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Version: | V1 |
Data Contributor(s): | Edward Brook, Joseph McConnell, Rachel Rhodes |
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.
Brook, E. J., J. McConnell, and R. Rhodes. 2015. Continuous, Ultra-high Resolution WAIS-Divide Ice Core Methane Record 9.8-67.2 ka BP, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5JM27K4. [Date Accessed].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.
Rhodes, R. et al. 2015. Enhanced Tropical Methane Production in Response to Iceberg Discharge in the North Atlantic, Science. 348. 1016-1019. http://dx.doi.org/10.1126/science.1262005
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).
Data are in both Microsoft Excel (.xlsx
) format and comma-delimited ASCII (.txt
)
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.
The Microsoft Excel (.xlsx
) file is 1,013 KB, and the ASCII (.txt
) file is 781 KB.
WAIS Divide, Antarctica: latitude 79°28.058' S; longitude: 112°05.189' W
Spatial Resolution
Elevation: 3465 m
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.
Methane (CH4)
Sample Data Record
Refer to Figure 1 for an example of the data.

Software and Tools
The data can be accessed using Microsoft Excel (.xlsx
file) or any text editor (.txt
file).
Data Acquisition and Processing
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.

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.
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
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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