LAWSON_HYDRO_DAILY English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2016-04-03 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Daily summarized seasonal measurements of discharge, water temperature, and specific conductivity from Lawson Creek at B3, McMurdo Dry Valleys, Antarctica (1994-2023, ongoing) 2016-04-03 publication Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com pointOfContact Diane McKnight University of Colorado Boulder http://www.colorado.edu/ diane.mcknight@colorado.edu pointOfContact documentDigital As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the glacial meltwater streams in that region. This package contains daily summaries derived from 15-minute measurements of water quality and quantity parameters measured with automatic recording devices on streams in this region. Specifically, this metadata record describes the daily hydrological summaries for the McMurdo Dry Valleys' Lawson Creek at B3, located in the Bonney Basin of Taylor Valley. Measurements commenced during the 1994-95 season and are ongoing. The data associated with this record can be used to extrapolate the discontinued hydrological data nearby at the Santa Fe Stream. This dataset extends through the first half of the 2022-23 field season. Name: Anna T. Wright Role: field technician Name: Renée F. Brown Role: data manager Name: Sam Beane Role: former field crew Name: Chris Jaros Role: former field crew Name: Inigo San Gil Role: former data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact unknown No data were collected during the 20-21 austral summer due to the COVID-19 pandemic. Metadata created and standardized for data-silo exports in EML.   In order to make the data more relational / useful in Oracle and ArcInfo, and generate links between different data and metadata fields, a dataset code was added to these files.   In October, 1999 Mike Gooseff submitted the 1997-98 data to Denise Steigerwald (the data manager) in ascii, comma delimited files. In order to prepare the files for use in an Oracle database as well as a geographic information system, Denise created a field for "strmgageid" (stream gage id), converted any time fields of 24:00 to 0:00 on the following day, combined the date and time fields into one date/time field, and separated the data into separate files for each station. Data which was previously presented according to decade collected is now presented according to location, and contains records from the start date of monitoring for a given stream gage.   The 'discrete_stream_gauge' table was created by Harry House in early 1994. It was first stored in an INGRES database, but was converted to ORACLE format in early 1996. Modifications were generally made each year after the initial creation in the early part of the year. It was transferred to INSTAAR in late 1997, where it was stored in a Microsoft Access database, and presented on the web in ascii, comma delimited files. disturbance theme LTER Core Areas English USGS site 16 Parent Stream: Lawson Creek id: lawson_b3 162.269910000000 162.269910000000 -77.721248000000 -77.721248000000 ground condition 1994-12-06 2023-01-21 https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-b3_lawson-daily-20240108.csv LAWSON_DAILY_HYDRO eng; US McMurdo Dry Valleys LTER LAWSON_DAILY_HYDRO Data Source Definition : Lawson Creek at B3 (Daily) Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Field Delimiter : , false STRMGAGEID Code representing stream gage DATE_TIME Date on which measurement was made Date Time Format: MM/DD/YYYY AVG_DISCHARGE Average stream discharge, measured in liters per second STDDEV_DISCHARGE Stadard deviation of the Stream discharge value distribution MIN_DISCHARGE Minimum of the Stream discharge MAX_DISCHARGE Maximum of the Discharge Rate N_DISCHARGE Number of observations for the daily stats. TDAILY_DISCHARGE The Stream total daily discharge AVG_TEMP Average water temperature in celsius STDDEV_TEMP Standard deviation of the water temperature distribution MIN_TEMP The minimum temperature MAX_TEMP Maximum temperature N_TEMP Number of observations for the daily stats. AVG_COND Average Conductivity STDDEV_COND Standard deviation of the conductivity MIN_COND Minimum Conductivity MAX_COND Maximum Conductivity N_COND Number of observations for the daily stats. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-b3_lawson-daily-20240108.csv dataset Campbell CR10 dataloggers were used to record stream stage, water temperature, and conductivity in a network of stream gages. Stage is monitored with pressure transducers; PSS-1 and PS-2 models form Paroscientific Corporation, and Accubars from Sutron Corporation. The pressure transducers measure the backpressure in orifice lines set into or above controls in the stream channel. In addition, some of the sites monitor water temperature and conductivity with either USGS minimonitor probes, or Campbell temperature/conductivity probes. Ratings are developed for the stage/discharge relationship at each site by measuring streamflow with current meters or portable flumes, according to standard USGS methods. Datum corrections to the stage are determined by periodically surveying the elevation of the orifice line to the control and nearby reference marks. Calibrations for the temperature and conductivity are assessed by measuring these parameters with portable field meters while simultaneously noting the readings from the gage probes. Data is downloaded into Campbell storage modules, and retrieved into pcs. From there, the data is sent to a USGS computer, where time discrepancies are resolved, and the data is loaded into ADAPS, a database system developed in the USGS for maintaining and processing water data. A determination for each site as to when the stream was flowing and when it was not is made. For water temperature and conductivity, bad data is deleted. Variable shifts are determined based on field calibration measurements, and other indicators. The shifts are applied to the remaining good data inside of ADAPS. The data is pulled out of ADAPS, and reformatted for input into ORACLE. Cases of water temperature below reasonable values are set to lower limits. A quality code is assigned to every value. The resulting data is uploaded into the ORACLE and the McMurdo database. For stage/discharge, bad data is deleted. Survey data is reviewed to compute weir elevations and datum corrections. A rating curve is developed graphically, based on available data, and entered into ADAPS. All applicable shifts and datum corrections are entered into ADAPS. All corrections and ratings are run against the good stage data to compute the discharge at each recording interval . The data is pulled out of ADAPS, and reformatted for input into ORACLE. A quality code is assigned to every value. The resulting data is uploaded into ORACLE and the McMurdo database. ADAPS was deprecated in 2012 in favor of the software Aquarius. In March 2021, data from the 2015-16, 2016-17, and 2017-18 field seasons were replaced to correct a previously published error, in which discharge was reported in cubicFeetPerSecond (CFS) instead of litersPerSecond (l/s). Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact