MIERS_HYDRO_DAILY English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2021-04-29 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 Miers Stream at M2, McMurdo Dry Valleys, Antarctica (2014-2023, ongoing) 2021-04-29 publication Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com 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' Miers Stream at the M2 streamgage, located in Miers Valley. Measurements commenced during the 2014-15 austral summer. 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 completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact disturbance theme LTER Core Areas English This is the gage for the Miers stream at the site M2, below the Lake Miers. LTER Stream gage. Provenance: Desgnated in 2015/16 season. Assigned credentials in DEIMS by email from Chris Jaros to Inigo San Gil 163.918368000000 163.918368000000 -78.099605000000 -78.099605000000 ground condition 2014-12-06 2023-02-01 https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-m2_miers-daily-20240813_0.csv MIERS_HYDRO_DAILY eng; US McMurdo Dry Valleys LTER MIERS_HYDRO_DAILY Data Source Definition : Miers Stream at M2 (Daily) Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false STRMGAGEID Code representing the stream gage DATE_TIME Date on which the measurements were made (New Zealand DST, +13 UTC) Date Time Format: DD/MM/YYYY AVG_DISCHARGE Average daily stream discharge, measured in liters per second STDDEV_DISCHARGE STDDEV_DISCHARGE MIN_DISCHARGE Minimum daily discharge rate. MAX_DISCHARGE Maximum daily discharge rate. N_DISCHARGE Number of discharge observations per day. TDAILY_DISCHARGE Total daily stream discharge. AVG_TEMP Average daily water temperature in celsius. STDDEV_TEMP Standard deviation of daily water temperature. MIN_TEMP Minimum daily water temperature. MAX_TEMP Maximum daily water temperature. N_TEMP Number of daily water temperature observations. AVG_COND Mean daily specific conductivity. STDDEV_COND Standard deviation of daily specific conductivity. MIN_COND Minimum daily specific conductivity. MAX_COND Maximum daily specific conductivity. N_COND Number of daily specific conductivity observations. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-m2_miers-daily-20240813_0.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. Since 2012, stream hydro data is processed using Aquarius software, but procedure is similar to past, when ADAPS was used (described in next paragraph). 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact