| Data Set Citation |
Priscu J.Macronutrient Concentrations in McMurdo Dry Valley Lakes.
knb-lter-mcm.0056.4
(http://metacat.lternet.edu:8080/knb/metacat/knb-lter-mcm.0056.4/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: | limnutr.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) project
is identifying patterns and movements of nutrients in perennial ice-covered lakes. This data
set addresses this core area of research and quantifies macronutrient concentrations found at
specific depths in McMurdo Dry Valley lakes.
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| Keywords: |
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- lake
(theme)
- limnology
(theme)
- nutrient
(theme)
- ammonia
(theme)
- nitrate
(theme)
- nitrite
(theme)
- soluble reactive phosphorus
(theme)
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(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, 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 Metanut9697.rtf and Metanut9798.rtf files. The files were
called up using Microsoft Word version 6.0. Text from these files 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 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. One-100
mL sub-sample was taken from the one-liter amber Nalgene bottle. The sample was filtered
through a combusted (475 degrees C for 4 hours) Whatman 25 mm GF/F filter using a bell jar
apparatus. The filtrate was collected in a 125 mL acid washed Nalgene bottle and stored at
-20 degrees C until analysis by ASA analyticalThe filtrate was collected in a 125 mL acid washed
Nalgene bottle and stored at -20C until analysis by ASA Analytical Services. The filter was used
for chlorophyll-a analysis. The ASA analytical chemist performed the nutrient assays with a Lachat
Quickchem AE Autoanalyzer using standard methods. Soluble Reactive Phosphorus was
determined manually in a 10 cm cell using an ammonium molybdate method.
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| Additional Metadata |
| Additional Metadata: | Item 1 (View) |
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