FRLM_MONTHLY
English
utf8
dataset
McMurdo Dry Valleys LTER Information Manager
im@mcmlter.org
pointOfContact
2019-08-14
ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions
ISO 19115-2:2009(E)
Monthly measurement summaries from Lake Fryxell Meteorological Station (FRLM), McMurdo Dry Valleys, Antarctica (1993-2022, ongoing)
2019-08-14
publication
Peter Doran
Louisiana State University
http://lsu.edu
pdoran@lsu.edu
https://www.lsu.edu/science/geology/people/faculty/doran.php
pointOfContact
Andrew Fountain
Portland State University
http://www.pdx.edu
(503) 725-3386
P.O. Box 751
Portland
OR
97207
US
andrew@pdx.edu
http://glaciers.pdx.edu/fountain/
pointOfContact
documentDigital
As part of the McMurdo Dry Valleys Long Term Ecological Research program, meteorological data are collected from various locations throughout the McMurdo Dry Valleys of Antarctica. This data package contains monthly measurement summaries derived from 15-minute data generated by the Lake Fryxell Meteorological Station (FRLM), located in Taylor Valley. BOYM was established in 1993, during the 93/94 field season.
Name: Krista F. Myers Role: field technician Name: Renée F. Brown Role: data manager Name: Maciej K. Obryk Role: former field crew Name: Hassan Basagic Role: former field crew Name: Thomas Nylen Role: former field crew Name: Inigo San Gil Role: former data manager
completed
McMurdo Dry Valleys LTER Information Manager
im@mcmlter.org
pointOfContact
disturbance
theme
LTER Core Areas
English
Located on small island in Lake Fryxell.ID: FRLM
163.170100000000
163.170100000000
-77.611300000000
-77.611300000000
ground condition
1993-12-01
2022-12-31
Meteorological data are collected year-round at each of MCM LTER stations. Data are manually downloaded from the meteorological stations during the austral summer. Raw 15 minute data (Level 0) are processed and provided as Level 1 data on the MCM LTER website. Field notes, sensor information, processing procedures, QA/QC, and metadata are provided in the Meteorological Post Processing Documentation and Task Lists for each field season at the following address: https://mcm.lternet.edu/meteorological-task-lists
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_airt-monthly-20230605.csv
FRLM_AIRT_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_AIRT_MONTHLY
Data Source Definition : FRLM - Air Temperature (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
Location code for this met station
DATE_TIME
Date sample was collected
Date Time Format: mm/dd/yyyy
AVG_AIRT3M
Average air temperature at 3 m above ground
STD_AIRT3M
Standard deviation for the air temperature at 3 m above ground
MIN_AIRT3M
Minimum value of the air temperature at 3 m above ground
MAX_AIRT3M
Maximum value for the air temperature at 1.3 m above ground
N_AIRT3M
Number of observations for this average
AVG_AIRTDEL3M1
Average of air temperature at 3 m minus air temperature at 1 m
STD_AIRTDEL3M1
Standard deviation of the air temperature distribution at 3 m minus air temperature at 1 m
MIN_AIRTDEL3M1
Minimum value of the air temperature at 3 m minus air temperature at 1 m
MAX_AIRTDEL3M1
Maximum of the air temperature at 3 m minus air temperature at 1 m
N_AIRTDEL3M1
Number of observations of the air temperature at 3 m minus air temperature at 1 meter above ground used for these statistics
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_airt-monthly-20230605.csv
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_radn-monthly-20230605.csv
FRLM_RADN_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_RADN_MONTHLY
Data Source Definition : FRLM - Solar Radiation (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
Location code for this met station
DATE_TIME
Date sample was collected
Date Time Format: mm/dd/yyyy
AVG_PAR
Average photosynthetically active radiation (PAR).
STD_PAR
Standard deviation for the photosynthetically active radiation (PAR).
MIN_PAR
Minimum value of the photosynthetically active radiation (PAR).
MAX_PAR
Maximum value for the photosynthetically active radiation (PAR).
N_PAR
Number of observations for the photosynthetically active radiation (PAR) statistics
AVG_SWRADIN
Average for the short wave incoming radiation
STD_SWRADIN
Standard deviation for the short wave incoming radiation
MIN_SWRADIN
Minimum value of the short wave incoming radiation
MAX_SWRADIN
Maximum incoming shortwave radiation based on applying instrument-specific multiplier
N_SWRADIN
Number of data records included for the statistics
AVG_SWRADOUT
Average for the short wave outbound radiation
STD_SWRADOUT
standard devation of the the short wave outbound radiation
MIN_SWRADOUT
Minimum the short wave outbound radiation
MAX_SWRADOUT
Maximum soil temperature at 10 cm depth
N_SWRADOUT
Number of observations the short wave outbound radiation
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_radn-monthly-20230605.csv
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_rh-monthly-20230605.csv
FRLM_RH_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_RH_MONTHLY
Data Source Definition : FRLM - Relative Humidity (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
Location code for this met station
DATE_TIME
Date sample was collected
Date Time Format: mm/dd/yyyy
AVG_RH
Average of the relative humidity values
STD_RH
The standard deviation for the distribution of daily rel. humidity values
MIN_RH
The minimum of the relative humidity
MAX_RH
The maximum of the relative humidity
N_RH
Number of observations for the daily stats.
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_rh-monthly-20230605.csv
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_soilt-monthly-20230605.csv
FRLM_SOILT_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_SOILT_MONTHLY
Data Source Definition : FRLM - Soil Temperature (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
Location code for this met station
DATE_TIME
Date sample was collected
Date Time Format: mm/dd/yyyy
AVG_SOILT0CM
Average soil temperature at ground
STD_SOILT0CM
Standard deviation for the soil temperature at suface ground
MIN_SOILT0CM
Minimum value of the soil temperature at surface ground
MAX_SOILT0CM
Maximum value for the air temperature at 3 m above ground
N_SOILT0CM
Number of observations for this average
AVG_SOILT5CM
Average soil temperature at 5cm below ground
STD_SOILT5CM
Standard deviation for the soil temperature at 5cm below ground
MIN_SOILT5CM
Minimum value of the soil temperature at 5cm below ground
MAX_SOILT5CM
Maximum soil temperature at 5 cm depth
N_SOILT5CM
Number of observations for this average
AVG_SOILT10CM
Average soil temperature at 10 cm depth
STD_SOILT10CM
standard devation of the soil temperature at 10 cm depth
MIN_SOILT10CM
Minimum soil temperature at 10 cm depth
MAX_SOILT10CM
Maximum soil temperature at 10 cm depth
N_SOILT10CM
Number of observations used to compute these statistics
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_soilt-monthly-20230605.csv
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_surf-monthly-20230605.csv
FRLM_SURF_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_SURF_MONTHLY
Data Source Definition : FRLM - Ice Surface Change (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
Location code for this met station
DATE_TIME
Date sample was collected
Date Time Format: mm/dd/yyyy
AVG_SURFELEVCHANGE
Average surface change - snowfall / sediment accumulation or loss
STD_SURFELEVCHANGE
Standard deviation for the surface change - snowfall / sediment accumulation or loss
MIN_SURFELEVCHANGE
Minimum value of the surface change - snowfall / sediment accumulation or loss
MAX_SURFELEVCHANGE
Maximum value for the surface - snowfall / sediment accumulation or loss
N_SURFELEVCHANGE
Number of observations for this average
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_surf-monthly-20230605.csv
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_wspd-monthly-20230605.csv
FRLM_WSPD_MONTHLY
eng; US
McMurdo Dry Valleys LTER
FRLM_WSPD_MONTHLY
Data Source Definition : FRLM - Wind Speed (Monthly) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : ,
false
METLOCID
METLOCID identification code for the meteorological station
DATE_TIME
Date when measurement was taken
Date Time Format: DD/MM/YYYY
AVG_WSPD
Average of the daily values of the wind speed
STDDEV_WSPD
Standard deviation of the daily distribution of the wind speed
MIN_WSPD
Minimum value of the wind speed for the period of one day
MAX_WSPD
Maximum value of the wind speed for the period of one day
N_WSPD
Number of data points used to calculate these statistics.
N_COMMENTS
Number of comments about the measurement in this period
DBF
https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_wspd-monthly-20230605.csv
dataset
When the McMurdo Dry Valley LTER project began in December, 1993, a lake-ice meteorology station was already set up at Lake Fryxell. It was a 6 foot tower built by Rich Harnish in ~1989, but had not collected data for at least a year. Peter Doran, noting that the problem was power related (since the battery was under water and the voltage was less than 5), righted the station, and rebuilt it with new power supply, a new wind monitor, new CR10, new solar panel, and added a quantum sensor. The under water light sensors were not hooked up again nor was the barometric pressure sensor. The lake-ice station was operated from 7 December 1993 to 6 January 1994 (this lake-ice station is located in the same table as the Lake Fryxell shore station and is noted with the METLOCID=FRIM). At that time, it was decided that maintenance of the records at the site of the old Fryxell land station was more important than the ice station so the ice station was cannibalized to re-establish the Lake Fryxell shore station, (which had been destroyed by wind the previous winter (METLOCID=FRLM)). The station was based on a 6 foot tripod which set it apart from the other Taylor Valley stations, but a 10 foot tower was subsequently installed in year 2. The land station is located a few meters above the old site to avoid rising lake levels. On June 25, 2001 @ 0230 the station mast broke and blew over, breaking the wind monitor. Station was taken apart on November 16, 2001, with the sensors except wind temporally set up on what was left of the station. On November 27, 2001 the station was reconstructed and was made operational again. Mark all values from June to November as bad or questionable except the soil temperatures The station was set up to sample sensors every 30 seconds and send summary statistics (for example, averages and maximums) to solid-state storage modules every: 10 minutes from December 7, 1993 to January 6, 1994 and January 7, 1994 to January 12, 1994, three hours from January 6, 1994 to January 7, 1994 and January 12, 1994 to November 28, 1994, 20 minutes between November 28, 1994 and November 21, 1995, and 15 minutes thereafter. This has resulted in approximately 20 values being recorded for final storage in every output interval. Primary measurements made on Lake Fryxell meteorology station, instrumentation used, and time of initiation are shown in the following table: In 2007, it was realized that the RH error was still present in parts of the dataset. Hasan Basagic made the above corrections to the FRLM dataset for the date range 1/23/2004 11:15 - 12/21/2006 13:30 (102,058 records). In September, 2007 the information manager (Chris Gardner) removed all old RH data and re-inserted then newly calculated values and associated comments. The original files are archive in the 'submitted data' section of the mcmlter server. Sampling and Averaging Intervals For Sampling frequency and Data Logger output and averaging intervals please visit:http://mcmlter.ltenet.edu/data/meteorology/methods/Interval_Dates.pdf
Metadata Access Constraints: none Metadata Use Constraints: none
annually
McMurdo Dry Valleys LTER
http://mcmlter.org/
pointOfContact