Devin N. Castendyk 2014-10-30 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/8d37c233ae7b4f39b8864c7310d87387 https://mcm.lternet.edu/content/2012-2013-sub-ice-current-velocities-recorded-acoustic-doppler-current-profiler Between 26 November 2012 and 22 January 2013, a SonTek Argonaut-XR 1.5 MHz Acoustic Doppler Current Profiler (ADCP) was fixed at the bottom of the Limno Sampling Hole in Lake Hoare, looking downward through the water column. Every 30 seconds, the ADCP measured horizontal and vertical current velocities in six, 50-cm-thick cells between 0.5 and 3.5 m below the lake ice. The observation interval became deeper over time as the ADCP platform melted into the lake ice and the lake ice thinned. Data collected from 26 to 30 November represent pre-discharge data when wind and solar radiation were the only forces acting on the lake. Data from 30 November to 8 December transition from pre-discharge to spring freshet conditions on 6 December. Spring freshet was the most dynamic period observed with highest velocities recorded. Data from 8 to 13 December transitioned from the end of spring freshet on 10 December to summer diurnal discharge conditions. Data from the remaining datasets, 13 to 22 December, 22 to 29 December, 29 December to 6 January, 6 to 13 January, and 13 to 22 January, reflect conditions during summer diurnal stream discharge, especially data from 29 December to 6 January. From these observations, solar radiation, wind, glacial runoff during spring o collect a long duration dataset of sub-ice currents spanning pre-discharge, spring freshet, and diurnal discharge events in order to identify the causes of sub-ice currents and seiche activity observed in 2009-2010. 2012-01-01 2013-12-31 ground condition As needed Lake Hoare occupies a narrower portion of the Taylor Valley, dammed by the Canada Glacier. It would drain almost completely without this dam. There are a number of islands which may be related to an old terminal of Canada Glacier. The lake is fed primarily from direct runoff from the glacier, as well as meltwater streams. (Lake level rose ~1.5 m between 1972 and 1996). There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 15 Maximum Length (km): 4.2 Maximum Width (km): 1 Maximum Depth (m): 34 Surface Area (km^2): 1.94 Ice Thickness Average Surface (m): 3.1 - 5.5 Volume (m^3 * 10^6): 17.5 162.935836791992 162.784423828125 -77.623085021973 -77.639259338379 73m 73m meter [term:vocabulary] None <cntorg>McMurdo Dry Valleys LTER</cntorg> <onlink>http://mcmlter.org/</onlink> <span property="dc:title" content="McMurdo Dry Valleys LTER" class="rdf-meta element-hidden"></span> Name: Inigo San Gil Role: data manager LIMNO_ANCILLARY_ADCP2 DATASET_CODE A code used to identify the entity table name and create lists of data holdings The data provider A code used to identify the entity table name and create lists of data holdings LOCATION NAME Name of lake where measurement was made The data provider Name of lake where measurement was made LOCATION CODE Location in the lake where measurement was made The data provider Location in the lake where measurement was made Attribute Label Date on which sample was gathered The data provider calendar date/time mm/dd/yy H:M:S gregorian calendar SAMPLE_ID An internal identifier for the record The data provider An internal identifier for the record MIN_DEPTH (m) Minimum Depth value for the measurement range The data provider meter MAX_DEPTH (m) Maximum Depth value for the measurement range The data provider meter Vx (cm/s) the velocity component for the X-axis - East-West, where positive values mean fluid moving towards the west The data provider centimetersPerSecond 0.5 Vy (cm/s) the velocity component for the Y-axis - North-South, where positive values mean fluid moving towards the north The data provider centimetersPerSecond 0.5 Vz (cm/s) the velocity component for the Z-axis - Bottom-Up, where positive values mean fluid moving towards the bottom (down) The data provider centimetersPerSecond 0.5 Speed_xy (cm/s) the magnitude of the velocity (the speed) on the horizontal plane for the x-axis The data provider centimetersPerSecond 0.5 Dir THe orientation of the velocity vector on the horizontal plane The data provider degree McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 28 column , https://mcm.lternet.edu/sites/default/files/LIMNO_ANCILLARY_ADCP2.csv None 2014-10-30 2014-10-30 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