| Data Tables, Images, and Other Entities: |
| Data Table: | Units_and_Column_Descriptions
View Table Metadata
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Short Name: | glcrchem_DP_2001 |
| Online Distribution Info: |
| Download File: |
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| Data Set Owner(s): |
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Individual: | Andrew Fountain |
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Address: |
| Department of Geology, |
| 17 Cramer Hall, |
| 1721 SW Broadway, |
| Portland State University , |
| Portland, OR 97207-0751
USA |
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| Metadata Provider(s): |
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Organization: | McMurdo Dry Valleys LTER |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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| Associated Party: |
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Individual: | Kathleen Welch |
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Address: |
| Byrd Polar Research Center , |
| The Ohio State University, |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210 USA |
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Individual: | Hassan Basagic |
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Address: |
| Department of Geology, |
| Portland State University , |
| Portland, OR 97207-0751
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| Abstract: |
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The chemistry of cryoconite holes on Canada glacier was measured in January, 2001
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| Keywords: |
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- glacier
(theme)
- cryoconite
(theme)
- ice
(theme)
- snow
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- water solute concentrations
(theme)
- inorganic
(theme)
- anions
(theme)
- cations
(theme)
- chemistry
(theme)
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| Additional Information: |
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| Note |
Data contained in these files has been subjected to quality control
standards imposed by the investigator. The user of this data should be aware
that, while efforts have been taken to ensure that these data are of the highest
quality, there is no guarantee of perfection for the data contained herein and the
possibility of errors exists. If you encounter questionable data, please contact
the MCM LTER data manager so that the data can be corrected or qualified. Thus,
these data may be modified and future data will be appended.
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| License and Usage Rights: |
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| MCM LTER data may be used freely with the following restrictions: |
The Principal Investigator be sent a notice stating
reasons for acquiring any data and a description of the
publication intentions.
The Principal Investigator of the data set be sent a
copy of the report or manuscript prior to submission and be
adequately cited in any resultant publications.
A copy of any resultant publications should be sent
to the McMurdo data manager and principal
investigator.
The end-user follow the guidelines set forth in the
LTER Network Data Access Policy, Data Access Requirements, and
General Data Use Agreement found at
http://www.mcmlter.org/data_guidelines.htm
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| Geographic Coverage: |
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Geographic Description: | Canada Glacier - Taylor Valley, Antarctica |
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Bounding Coordinates:
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| West: | 162 degrees
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| East: | 163.6 degrees
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| North: | -77.2 degrees
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| South: | -77.8 degrees
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Mimimum Altitude: | 0 meter |
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Maximum Altitude: | 2000 meter |
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| Temporal Coverage: |
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Date:
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| Contact: |
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Organization: | McMurdo Dry Valleys LTER |
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Position: | Data Manager |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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| Publisher: |
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Organization: | McMurdo Dry Valleys LTER |
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Address: |
| Byrd Polar Research Center , |
| 108 Scott Hall, |
| 1090 Carmack Rd, |
| Columbus, OH 43210-1002 USA |
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| Methods Info: |
| Step 1: |
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Description:
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The Canada glacier was sampled for cryoconite holes over a period of three days by Thomas Nylen, Robin Johnston and Dorota Porazinska.
Samples 1-12 were collected in the evening of 16 January 2001, samples 13-38 throughout the entire day of 17 January 2001, and the remaining samples throughout the entire day of 18 January 2001.Samples were taken from seven different locations on the Canada Glacier. GPS coordinates of these sites and the number of samples taken at each site is the following:
* Met Station: S 77deg 36.7' and E 162deg 57.7', Number of samples = 12
* Upper West: S 77deg 36.5' and E 162deg 56.4', Number of samples = 3
* Upper East: ?, Number of samples = 7
* Middle East: S 77deg 36.8' and E 163deg 10.1', Number of samples = 7
* Lower East: S 77deg 37.4' and ?, Number of samples = 7
* Lower Central: Stake #65 (need to get from Thomas), Number of samples = 6
* Lower West: S 77deg 37' 17" and E 162deg 55' 56", Number of samples = 7
* Middle West: S 77deg 37' 11.4" and E 162deg 56' 08.6", Number of samples = 6
At each location, cryoholes adjacent to each other were sampled. All cryoholes (except one) were frozen solid. To reach the sediment layer, a Sipre ice corer was used. As soon as a cryohole was located, the diameter in N-S and E-W directions was recorded, and followed by drilling into the ice until the sediments would show up in the drilling dust accumulating on the ice surface. All drilling was done by Thomas Nylen. When the ice core was excavated, the depth of the cryohole (from the ice surface to bottom of the sediment layer), and the width of the sediment layer were measured. Only 25 cm (from the bottom of the sediment up) of the ice core were packed into sterile Whirl-Pak large plastic bags, stored in a back pack and brought down to the Lake Hoare camp lab. The Sipre ice corer and other heavy supplies were pulled on sleds.
All ice cores were left in the lab at room temperature conditions to melt. Since plastic bags can be perforated by the sharpness of ice cores, bags containing ice cores were placed in plastic beakers to prevent leakage. Ice cores melted within 16 hours. When melted, samples were shaken to mix the sediment and water and left for at least 5 hours for the sediment to settle.
300 ml of supernatant were transferred into 500 ml Nalgene bottles (washed in soap water and rinsed three times with DI water). 100 ml of this volume were filtered on a column tower using 47mm 0.4micro PC membrane filters and collected into 100ml Nalgene bottles (washed as above) and used for cation and anion concentrations. Additional 100ml was filtered through baked 47mm Whatman GF/F filters and collected into 100ml amber glass bottles (washed as above, and baked at 470degC capped with aluminum foil, then closed with original caps that were rinsed in 10% HCL and DI water) for DOC. To kill all possible organisms in the water samples and thus prevent usage of DOC, samples were fixed with 1 ml of 37% HCL ( added to the bottles right after filtration). Filtration was done by Dorota Porazinska.
The remaining water with sediment was transferred from the Whirl-Pak bags into 500ml Nalgene bottles. All samples were packed into coolers and transported back to McMurdo lab on 20 January 2001 where they were processed for pH, EC, and nematodes using standard protocols. [DP 20 Jan 01].
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