Peter T. DoranAndrew G. Fountain 2019-08-14 Monthly measurement summaries from Lake Fryxell Meteorological Station (FRLM), McMurdo Dry Valleys, Antarctica (1993-2022, ongoing) tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/baa3cda00a8320c9c20bc461d4408bc5 https://mcm.lternet.edu/content/monthly-measurement-summaries-lake-fryxell-meteorological-station-frlm-mcmurdo-dry-valleys 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. 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 1993-12-01 2022-12-31 ground condition As needed Located on small island in Lake Fryxell.ID: FRLM 163.170100000000 163.170100000000 -77.611300000000 -77.611300000000 25m 25m meter LTER Core Areas disturbance None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Krista F. Myers Role: field technician Name: RenĂ©e 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 Not Applicable Not Applicable Field and/or Lab Methods 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 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  unknown FRLM_AIRT_MONTHLY FRLM - Air Temperature (Monthly) METLOCID Location code for this met station The data provider Location code for this met station Date_time Date sample was collected The data provider calendar date/time mm/dd/yyyy gregorian calendar AVG_AIRT3M Average air temperature at 3 m above ground The data provider celsius 0.01 STD_AIRT3M Standard deviation for the air temperature at 3 m above ground The data provider celsius 0.01 MIN_AIRT3M Minimum value of the air temperature at 3 m above ground The data provider celsius 0.01 MAX_AIRT3M Maximum value for the air temperature at 1.3 m above ground The data provider celsius 0.01 N_AIRT3M Number of observations for this average The data provider dimensionless AVG_AIRTDEL3M1 Average of air temperature at 3 m minus air temperature at 1 m The data provider celsius 0.01 STD_AIRTDEL3M1 Standard deviation of the air temperature distribution at 3 m minus air temperature at 1 m The data provider celsius 0.01 MIN_AIRTDEL3M1 Minimum value of the air temperature at 3 m minus air temperature at 1 m The data provider celsius 0.01 MAX_AIRTDEL3M1 Maximum of the air temperature at 3 m minus air temperature at 1 m The data provider celsius 0.01 N_AIRTDEL3M1 Number of observations of the air temperature at 3 m minus air temperature at 1 meter above ground used for these statistics The data provider dimensionless 0.01 N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_airt-monthly-20230605.csv None FRLM_RADN_MONTHLY FRLM - Solar Radiation (Monthly) METLOCID Location code for this met station The data provider Location code for this met station Date_time Date sample was collected The data provider calendar date/time mm/dd/yyyy gregorian calendar AVG_PAR Average photosynthetically active radiation (PAR). The data provider W/m^2 0.01 STD_PAR Standard deviation for the photosynthetically active radiation (PAR). The data provider W/m^2 0.01 MIN_PAR Minimum value of the photosynthetically active radiation (PAR). The data provider W/m^2 0.01 MAX_PAR Maximum value for the photosynthetically active radiation (PAR). The data provider W/m^2 0.01 N_PAR Number of observations for the photosynthetically active radiation (PAR) statistics The data provider dimensionless AVG_SWRADIN Average for the short wave incoming radiation The data provider W/m^2 0.01 STD_SWRADIN Standard deviation for the short wave incoming radiation The data provider W/m^2 0.01 MIN_SWRADIN Minimum value of the short wave incoming radiation The data provider W/m^2 0.01 MAX_SWRADIN Maximum incoming shortwave radiation based on applying instrument-specific multiplier The data provider -5 400 W/m2 0.1 N_SWRADIN Number of data records included for the statistics The data provider dimensionless AVG_SWRADOUT Average for the short wave outbound radiation The data provider W/m^2 0.01 STD_SWRADOUT standard devation of the the short wave outbound radiation The data provider W/m^2 0.01 MIN_SWRADOUT Minimum the short wave outbound radiation The data provider W/m^2 0.01 MAX_SWRADOUT Maximum soil temperature at 10 cm depth The data provider W/m^2 0.01 N_SWRADOUT Number of observations the short wave outbound radiation The data provider dimensionless N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_radn-monthly-20230605.csv None FRLM_RH_MONTHLY FRLM - Relative Humidity (Monthly) METLOCID Location code for this met station The data provider Location code for this met station Date_time Date sample was collected The data provider calendar date/time mm/dd/yyyy gregorian calendar AVG_RH Average of the relative humidity values The data provider dimensionless Standard Dev. of RH The standard deviation for the distribution of daily rel. humidity values The data provider dimensionless Minimum RH The minimum of the relative humidity The data provider dimensionless Maximum RH The maximum of the relative humidity The data provider dimensionless Number of Observations Number of observations for the daily stats. The data provider dimensionless N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_rh-monthly-20230605.csv None FRLM_SOILT_MONTHLY FRLM - Soil Temperature (Monthly) METLOCID Location code for this met station The data provider Location code for this met station Date_time Date sample was collected The data provider calendar date/time mm/dd/yyyy gregorian calendar AVG_SOILT0CM Average soil temperature at ground The data provider celsius 0.01 STD_SOILT0CM Standard deviation for the soil temperature at suface ground The data provider celsius 0.01 MIN_SOILT0CM Minimum value of the soil temperature at surface ground The data provider celsius 0.01 MAX_SOILT0CM Maximum value for the air temperature at 3 m above ground The data provider celsius 0.01 N_SOILT0CM Number of observations for this average The data provider dimensionless AVG_SOILT5CM Average soil temperature at 5cm below ground The data provider celsius 0.01 STD_SOILT5CM Standard deviation for the soil temperature at 5cm below ground The data provider celsius 0.01 MIN_SOILT5CM Minimum value of the soil temperature at 5cm below ground The data provider celsius 0.01 MAX_SOILT5CM Maximum soil temperature at 5 cm depth The data provider celsius 0.01 N_SOILT5CM Number of observations for this average The data provider dimensionless AVG_SOILT10CM Average soil temperature at 10 cm depth The data provider celsius 0.01 STD_SOILT10CM standard devation of the soil temperature at 10 cm depth The data provider celsius 0.01 MIN_SOILT10CM Minimum soil temperature at 10 cm depth The data provider celsius 0.01 MAX_SOILT10CM Maximum soil temperature at 10 cm depth The data provider celsius 0.01 N_SOILT10CM Number of observations used to compute these statistics The data provider dimensionless N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_soilt-monthly-20230605.csv None FRLM_SURF_MONTHLY FRLM - Ice Surface Change (Monthly) METLOCID Location code for this met station The data provider Location code for this met station Date_time Date sample was collected The data provider calendar date/time mm/dd/yyyy gregorian calendar AVG_SURFELEVCHANGE Average surface change - snowfall / sediment accumulation or loss The data provider centimeter 0.01 STD_SURFELEVCHANGE Standard deviation for the surface change - snowfall / sediment accumulation or loss The data provider centimeter 0.01 MIN_SURFELEVCHANGE Minimum value of the surface change - snowfall / sediment accumulation or loss The data provider centimeter 0.01 MAX_SURFELEVCHANGE Maximum value for the surface - snowfall / sediment accumulation or loss The data provider centimeter 0.01 N_SURFELEVCHANGE Number of observations for this average The data provider dimensionless N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_surf-monthly-20230605.csv None FRLM_WSPD_MONTHLY FRLM - Wind Speed (Monthly) METLOCID METLOCID identification code for the meteorological station The data provider METLOCID identification code for the meteorological station DATE_TIME Date when measurement was taken The data provider calendar date/time DD/MM/YYYY gregorian calendar AVG_WSPD Average of the daily values of the wind speed The data provider metersPerSecond STDDEV_WSPD Standard deviation of the daily distribution of the wind speed The data provider metersPerSecond MIN_WSPD Minimum value of the wind speed for the period of one day The data provider metersPerSecond MAX_WSPD Maximum value of the wind speed for the period of one day The data provider metersPerSecond N_WSPD Number of data points used to calculate these statistics. The data provider dimensionless N_COMMENTS Number of comments about the measurement in this period The data provider dimensionless McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-clim-frlm_wspd-monthly-20230605.csv None 2019-08-14 2019-08-14 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module