Peter T. DoranAndrew G. Fountain 2014-11-05 High frequency measurements from Lake Vida Meteorological Station (VIAM), McMurdo Dry Valleys, Antarctica (1995-2022, ongoing) tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/550ff8cd5de3983de8b704a872426162 https://mcm.lternet.edu/content/high-frequency-measurements-lake-vida-meteorological-station-viam-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 15-minute data from the Lake Vida Meteorological Station (VIAM), located in Victoria Valley. 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) is processed and provided as Level 1 data on the MCM LTER website. Field notes, sensor information, processing procedures, QA/QC, and metadata is 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  1995-11-24 2022-12-14 ground condition On September 6, 1999, the data manager added the 1998-1999 data to this dataset. In the process,she did some fine-tuning of the data, which included:       1. Addition of  PAR values between Nov 24, 1997 @ 11:30 and Jan 13, 1998 @ 12:00. Thiswas done at the request of Thomas Nylen.       On June 1, 2000, the 1999-2000 data was posted. In the process, Denise  Steigerwald changed thelayout of the files so that they were sorted by category (ait temperatures, humidity, radiation,wind etc.) rather than by year. Files containing monthly and daily averages were generated andminor adjustments were made to the metadata.  On June 1, 2000, relative humidity (RH) values were corrected for a systematic error in the measurement created by an instrument manufacturer error. All RH data with air temperatures below freezing  were corrected using the vapor pressure over ice (rather than over water whichwas used initially). The error became quite large for very cold temperatures (the correction couldgrow to around 30%). The formula used for the correction was:        RH_corr=RH_orig/((A*temp*temp)+(B*temp)+C) where        RH_corr = corrected relative humidity       RH_orig = original relative humidity        temp = air temperature        A = 4.165E-5       B = 9.7E-3       C = 1.0 For example, with an air temperature of -2.3 and RH_orig of 50.6, the RH_corr will be  51.7.Records that showed corrected RH values greater than or equal to 100 were changed to 99.99and flagged.      In June 2000, summary files were added to the web containing daily and monthly statistics.These were generated by creating "views" of daily and monthly means,  minimums, maximumsand counts of the records represented in the Oracle database's meteorology tables. 2022-03-01: Data from the 13-14 season (2012-12-28 10:45 through 2014-01-02 22:15) was replaced due to missing wind speed data and related errors noted by Doran. July 2023: The RH sensor at this station was upgraded in January 2022. However, the measurements recorded by this new sensor are suspect. Consequently, no RH data have been released after 1/19/2022 10:45 while this issue is being investigated further. As needed located on western shore of Lake VidaID: VIAM 161.800700000000 161.800700000000 -77.377800000000 -77.377800000000 351m 351m 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 The Lake Vida meteorological station was added to the McMurdo Dry Valley network in the 1995-1996 field season. It was established on the shore of Lake Vida in Victoria Valley, one of the largest lakes in the dry valleys, recently discovered to have a 19 m ice cover over a hypersaline brine of undetermined depth. 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 15 minutes. This has resulted in approximately 20 values being recorded for final storage in every output interval. Sampling and Averaging Intervals For Sampling frequency and Data Logger output and averaging intervals please visit: http://mcmlter.lternet.edu/data/meteorology/methods/Interval_Dates.pdf Seasonal Task Summary To view the data post-processing steps for each season please visit: https://mcm.lternet.edu/meteorological-task-lists The Lake Vida meteorological station was added to the McMurdo Dry Valley network in the 1995-1996 field season. It was established on the shore of Lake Vida in Victoria Valley, one of the largest lakes in the dry valleys, recently discovered to have a 19 m ice cover over a hypersaline brine of undetermined depth. 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 15 minutes. This has resulted in approximately 20 values being recorded for final storage in every output interval.Sampling and Averaging Intervals For Sampling frequency and Data Logger output and averaging intervals please visit: http://mcmlter.lternet.edu/data/meteorology/methods/Interval_Dates.pdfSeasonal Task Summary To view the data post-processing steps for each season please visit: https://mcm.lternet.edu/meteorological-task-lists unknown VIAM_AIRT VIAM - Air Temperature DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar AIRT3M Average air temperature at 3 m above ground The data provider celsius 0.01 air temperature comments Noted comments by the investigator about the particular measure of air temperature The data provider Noted comments by the investigator about the particular measure of air temperature 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-viam_airt-15min-20230706.csv None VIAM_RADN VIAM - Solar Radiation DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar PAR Photosynthetically active radiation The data provider micromols/second/meter2 0.1 SWRADIN Incoming shortwave radiation/solar flux The data provider 0 900 W/m2 0.1 SWRADOUT Outgoing shortwave radiation/solar flux The data provider 0 900 W/m2 0.1 radiation comments Noted comments by the investigator about the particular measure of radiation The data provider Noted comments by the investigator about the particular measure of radiation 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-viam_radn-15min-20230706.csv None VIAM_RH VIAM - Relative Humidity DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar RH Relative humidity at 3 meters The data provider percent 0.01 relative humidity comments Noted comments by the investigator about the particular measure of relative humidity The data provider Noted comments by the investigator about the particular measure of relative humidity 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-viam_rh-15min-20220516.csv None VIAM_SOILT VIAM - Soil Temperature DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar SOILT0CM Soil temperature at 0 cm depth The data provider celsius 0.01 SOILT5CM Soil temperature at 5 cm depth The data provider celsius 0.01 SOILT10CM Soil temperature at 10 cm depth The data provider celsius 0.01 SOILT_COMMENTS Noted comments by the investigator about the particular measure of SOILT The data provider Noted comments by the investigator about the particular measure of SOILT 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-viam_soilt-15min-20230706.csv None VIAM_SURFCHANGE VIAM - Surface Change DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar SURF_CHANGE Surface Height Change - snowfall / sediment accumulation or loss The data provider centimeter 0.4 surface change comments Noted comments by the investigator about the particular measure of surface change The data provider Noted comments by the investigator about the particular measure of surface change 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-viam_surfchange-15min-20230706.csv None VIAM_WIND VIAM - Wind Direction and Speed DATASET_CODE Code for given set of information for Lake Vida meteorology station The data provider Code for given set of information for Lake Vida meteorology station METLOCID Location code for Lake Vida meteorology station The data provider Location code for Lake Vida meteorology station DATE_TIME Date/time of sample (New Zealand DST, +13 UTC) The data provider calendar date/time MM/DD/YYYY HH24:MI gregorian calendar WDIR Average wind direction The data provider degreesfromnorth 0.1 WDIRSTD Standard deviation of wind direction The data provider degreesfromnorth 0.1 WSPD Wind speed The data provider metersPerSecond 0.1 WSPDMAX Maximum wind speed The data provider metersPerSecond 0.1 WSPDMIN Minimum wind speed The data provider metersPerSecond 0.1 WIND_COMMENTS Noted comments by the investigator about the particular measure of WIND The data provider Noted comments by the investigator about the particular measure of WIND 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-viam_wind-15min-20230706.csv None 2014-11-05 2014-11-05 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