| Data Tables, Images, and Other Entities: |
| Data Table: | Units_And_Column_Descriptions
View Table Metadata |
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Short Name: | limncn.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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Phone:
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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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An important part of the McMurdo Long Term Ecological Research (LTER) is
evaluating carbon and nitrogen budgets in perennial ice-covered lakes. This data set addresses
this core area of research and quantifies the particulate carbon and nitrogen found at
specific depths in McMurdo Dry Valley lakes.
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| Keywords: |
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- lake
(theme)
- limnology
(theme)
- carbon
(theme)
- nitrogen
(theme)
- particulate organic carbon
(theme)
- particulate organic nitrogen
(theme)
- Antarctica
(theme)
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| Additional Information: |
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| Comments |
Instrument detection limits for POC and PON are 10 ug punch -1, and 5
ug punch -1, respectively.
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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, Lake Fryxell, Lake Joyce, and Lake Miers 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 Metachn9697.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.
Data for the 2005-6 and 2006-7 season was updated in Oct 2009
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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 were collected at specific depths with a five-liter Niskin
bottle during normal LTER limnological sampling. Sub-samples were decanted into three-1 L
Nalgene bottles (2-light and 1-amber), two-500 mL amber Nalgene bottles, three-150 mL
borosilicate glass bottles, two-20 mL scintillation vials, and one-30 mL serum vial. A 500 mL
sample from the one liter amber Nalgene bottle was decanted and filtered through a combusted
Whatman 25 mm GF/F filter (475 degrees C for 4 hours). After the sample was filtered, the
filter tower was rinsed with 20 mL of deionized water. The filter was placed onto an aluminum
weighing pan and air dried. Once the filters were dry, the pans were stacked together and
frozen for later analysis in McMurdo by ASA Analytical services. A filter paper punch was
used to take a sub-sample (10 mm diameter) from the Whatman 25 mm GF/F filter and was
analyzed using a Carlo-Erba Elemental Analyzer. The elemental analyzer was standardized with
acetanilide. Total particulate organic carbon (POC) and particulate organic nitrogen (PON)
was obtained by dividing the total area of the seston on the filter by the punch
area.
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