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PRINCIPAL INVESTIGATOR: KEYWORDS: lake, limnology, dissolved oxygen, YSI, temperature, Antarctica
ABSTRACT: As part of the Long Term Ecological Research (LTER) project in
the McMurdo Dry Valleys of Antarctica, a series of Taylor Valley lakes have been
monitored for dissolved oxygen and temperature profiles. A YSI dissolved oxygen meter
was used to record these measurements in the perennial ice-covered lakes of Taylor Valley.
VARIABLES: limno run, location name, location code, date, depth (m),
YSI Temp (°C), YSI Temp comments, YSI DO (mg L-1), YSI DO comments, file name
RESEARCH LOCATION: 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. Descriptions
of these lakes can be found in the McMurdo Dry Valley Lake
Descriptions file.
METHODS: A YSI Model 58 meter with a YSI 5739 probe was used to record
temperature and dissolved oxygen profiles. Calibration of the meter and probe was
performed in water saturated air, near 0°C, with the salinity correction set to 0
ppt. All measurements were recorded with the same salinity correction (0 ppt). The
probe was manually agitated by slowly moving in an up and down motion (~2 cm). Once
the probe stabilized, the data was recorded.
TIMING: Samples were collected from the following sites and dates: CITATIONS:
COMMENTS: The upper instrument detection limit for dissolved oxygen is 20 mg L-1.
STATUS: Public Access (Type 1).
VARIABLE DESCRIPTION:
VARIABLE TYPE DESCRIPTION UNITS MISSING VALUE INDICATOR MINIMUM MAXIMUM PRECISION Limno Run Text Code for lake's sampling location and date none Required entry n/a n/a n/a Location Name Text Name of lake where measurement was made none Required entry n/a n/a n/a Location Code Text Code for site where measurement was made none Required entry n/a n/a n/a Date Date Date on which sample was gathered mm/dd/yy Required entry 01/01/93 12/31/99 dd Depth (m) Number Distance below ice from which sample was drawn meters Required entry 1 45 1 YSI Temp (°C) Number Temperature measured at lake depth degrees celcius Null 0 100 0.1 YSI Temp Comments Text Helpful hints about the YSI Temp sample Null n/a n/a n/a YSI DO (mg/l) Number Dissolved oxygen measured at lake depth milligrams / liter Null 0 20 0.01 YSI DO Comments Text Helpful hints about the YSI DO sample Null n/a n/a n/a File Name Text Name of file in which data was submitted Null n/a n/a n/a LOG: 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 lktemps.metadata.txt and Metaysi9697.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.
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
(; (303)492-4639) so that the data can be
corrected or qualified. Thus, these data may be modified and future
data will be appended.
Season East Bonney West Bonney Hoare Fryxell
1993-1994 31-Oct-1993 28-Oct-1993 6-Nov-1993 17-Nov-1993
25-Nov-1993 27-Nov-1993 2-Dec-1993 9-Jan-1994
21-Dec-1993 24-Dec-1993 31-Dec-1993
1994-1995 4-Nov-1994 6-Nov-1994 10-Nov-1994 15-Nov-1994
27-Nov-1994 27-Nov-1994 1-Dec-1994 4-Dec-1994
21-Dec-1994 21-Dec-1994 27-Dec-1994 29-Dec-1994
14-Jan-1995 15-Jan-1995 22-Jan-1995 18-Jan-1995
1995-1996 22-Sep-1995 22-Sep-1995 8-Sep-1995 15-Sep-1995
6-Oct-1995 5-Oct-1995 26-Sep-1995 29-Sep-1995
18-Oct-1995 20-Oct-1995 11-Oct-1995 15-Oct-1995
6-Dec-1995 6-Dec-1995 23-Nov-1995 25-Nov-1995
2-Jan-1996 5-Jan-1996 25-Dec-1995 28-Dec-1995
1996-1997 5-Nov-1996 5-Nov-1996 10-Nov-1996 27-Oct-1996
26-Nov-1996 26-Nov-1996 3-Dec-1996 18-Nov-1996
19-Jan-1997 18-Jan-1997 13-Jan-1997 10-Jan-1997
1997-1998 10-Nov-1997 10-Nov-1997 16-Nov-1997 19-Nov-1997
21-Dec-1997 21-Dec-1997 26-Dec-1997 30-Dec-1997
1998-1999 10-Nov-1998 10-Nov-1998 4-Nov-1998 28-Oct-1998
7-Dec-1998 9-Dec-1998 2-Dec-1998 24-Nov-1998
31-Dec-1998 1-Jan-1999 27-Dec-1998 21-Dec-1998
1999-2000 7-Nov-1999 10-Nov-1999 18-Nov-1999 31-Oct-1999
6-Dec-1999 6-Dec-1999 13-Dec-1999 28-Nov-1999
29-Dec-1999 29-Dec-1999 5-Jan-2000 22-Dec-1999
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