| Data Set Citation |
Priscu J.Dissolved Inorganic Carbon Concentrations in McMurdo Dry Valley Lakes.
knb-lter-mcm.0059.2
(http://metacat.lternet.edu:8080/knb/metacat/knb-lter-mcm.0059.2/mcm).
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| Data Tables, Images, and Other Entities: |
| Data Table: | Units_And_Column_Descriptions
View Table Metadata |
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Short Name: | limndic.dat |
| Online Distribution Info: |
| Download File: |
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| Data Set Owner(s): |
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Individual: | John Priscu |
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Address: |
| Department of Land Resources and Environmental Sciences, |
| 334 Leon Johnson Hall, |
| Montana State University , |
| Bozeman, MT 59717 USA |
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Email Address:
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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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Phone:
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Email Address:
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| Abstract: |
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The McMurdo Long Term Ecological Research (LTER) project monitors patterns of
inorganic material transport in perennial ice-capped lakes. This data set addresses this core
area of research and quantifies dissolved inorganic carbon concentrations at specific depths
in McMurdo Dry Valley lakes. Dissolved inorganic carbon is also necessary for the computation
of primary productivity.
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| Keywords: |
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- lake
(theme)
- limnology
(theme)
- dissolved inorganic carbon
(theme)
- DIC
(theme)
- Antarctica
(theme)
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| Additional Information: |
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| Citations |
| Notes |
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 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: | Samples were collected from the East Lake Bonney, West Lake Bonney, Lake
Hoare, and Lake Fryxell limnological sampling stations, located in the McMurdo Dry Valleys of
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: | 1000 meter |
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| Temporal Coverage: |
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Begin:
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End:
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| Maintenance: |
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Description:
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Data from this table was submitted to INSTAAR by John Priscu's team at Montana
State University. The raw data files listed under 'file name' are the names of the original
files submitted. The 1993/94 and 1994/95 datasets are Microsoft Excel version 6.0 files, and
the 1995/96, 1996/97 and 1997/98 datasets are ascii text files. Upon arrival at INSTAAR, the
data manager fine-tuned the location codes and limno runs to match those provided in the
"locations, dates, codes for lake chemistry, biology samples" file. The file was imported
into Microsoft Access on INSTAAR's Unix system, and can currently be found there. The file
was then exported in ascii, comma delimited text and MS-DOS text (table layout) to present on
the MCM LTER web site. Both of these files are linked to this web page above. Information for
the metadata was obtained from the Metadic9697.rtf file. The file was called up using
Microsoft Word version 6.0. Text from this file was used to create this page in html
format.
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Frequency:
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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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Phone:
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Email Address:
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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, |
| Columbus, OH 43210-1002 USA |
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Phone:
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| Methods Info: |
| Step 1: |
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Description:
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Lake water samples are collected at specific depths with a five-liter Niskin bottle during normal LTER limnological sampling. Dissolved inorganic carbon samples (1 at each depth) are decanted through tubing directly from the Niskin bottle into a 30 mL serum vial. Lake water is allowed to overflow from the serum vial and completely displace the initial sample volume. Each sample is preserved with 0.15 mL chloroform, capped with a rubber stopper and crimped with an aluminum cap. Samples are stored in the dark at 4 degrees C until analysis. Samples are analyzed in at least duplicate following a method of sample acidification followed by infrared gas analysis using an IRGA (Infrared Gas Analyzer), and comparison to a standard curve. The standard curve is created by analyzing incremental samples of a 60 mgC/L DIC standard. The reported dissolved inorganic carbon concentrations of the lake water samples are averages of the replicate sample analyses. Analyses were performed with either an MSA Lira IRGA with HP Integrator or a Licor 6252 CO2 analyzer prior to the 2003-2004 season, with an MSA Lira IRGA with HP Integrator or Peak Simple Chromatography Data System from the 2003-2004 – 2006-2007 season, and with a Qubit Systems Infrared CO2 Analyzer with Peak Simple Chromatography Data System from the 2007-2008 season to present
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| Additional Metadata |
| Additional Metadata: | Item 1 (View) |
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