Hilary A. DuganPeter T. Doran 2020-09-10 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/83a9c811cf8c84844a21510b52fdd0e9 https://mcm.lternet.edu/content/high-frequency-1-min-pressure-measurements-continuous-stage-lake-level-and-ice-surface As part of the McMurdo Dry Valleys Long Term Ecological Research program, continuous stage (lake level) and ice surface ablation were collected at Lake Hoare, located in Taylor Valley, Antarctica. This package contains data measured at 1-minute intervals from Nov 2012 to Apr 2013, Nov 2013 to Feb 2014, and Nov 2014 to Oct 2016. 2012-10-28 2016-10-22 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 LTER Core Areas disturbance None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Two pressure sensors (Campbell Scientific, CS-455) are moored beneath the ice cover of Lake Hoare above the deepest portion of the lake beside the Limno Hole. The pressure sensors are part of a long-term monitoring program, and have been in operation for over a decade. One sensor is moored on a buoy weighted to the bottom of the lake and measures lake level (stage), while the other is frozen into the ice cover and measures ice ablation (Dugan et al. 2013, Winslow et al. 2014). Both sensors sit approximately 10 m beneath the ice cover, and are vented at the surface to correct for barometric pressure changes. In 2012, we programmed the Campbell Scientific CR1000 datalogger to record high frequency pressure changes at 1-minute intervals. Data were recorded from Nov 2012 to Apr 2013, Nov 2013 to Feb 2014, and Nov 2014 to Oct 2016.Ablation and stage are relative depths, and the absolute values cannot be compared between different data years. Dugan, H. A., M. K. Obryk, and P. T. Doran. 2013. Lake ice ablation rates from permanently ice-covered Antarctic lakes. J. Glaciol. 59(215), doi:10.3189/2013JoG12J080.Winslow, L. A., H. A. Dugan, H. Buelow, K. D. Cronin, J. C. Priscu, C. Vesbach, and P. T. Doran. 2014. Autonomous year-round sampling and sensing to explore the physical and biological habitability of permanently ice-covered Antarctic lakes. Mar. Technol. Soc. J. 48: 8-17. Two pressure sensors (Campbell Scientific, CS-455) are moored beneath the ice cover of Lake Hoare above the deepest portion of the lake beside the Limno Hole. The pressure sensors are part of a long-term monitoring program, and have been in operation for over a decade. One sensor is moored on a buoy weighted to the bottom of the lake and measures lake level (stage), while the other is frozen into the ice cover and measures ice ablation (Dugan et al. 2013, Winslow et al. 2014). Both sensors sit approximately 10 m beneath the ice cover, and are vented at the surface to correct for barometric pressure changes. In 2012, we programmed the Campbell Scientific CR1000 datalogger to record high frequency pressure changes at 1-minute intervals. Data were recorded from Nov 2012 to Apr 2013, Nov 2013 to Feb 2014, and Nov 2014 to Oct 2016.Ablation and stage are relative depths, and the absolute values cannot be compared between different data years. Dugan, H. A., M. K. Obryk, and P. T. Doran. 2013. Lake ice ablation rates from permanently ice-covered Antarctic lakes. J. Glaciol. 59(215), doi:10.3189/2013JoG12J080.Winslow, L. A., H. A. Dugan, H. Buelow, K. D. Cronin, J. C. Priscu, C. Vesbach, and P. T. Doran. 2014. Autonomous year-round sampling and sensing to explore the physical and biological habitability of permanently ice-covered Antarctic lakes. Mar. Technol. Soc. J. 48: 8-17. unknown LHBB_PRESS Lake Hoare 1-min Pressure Data Dataset code Internal dataset code. The data provider Internal dataset code. Timestamp Date and time the sample was taken. The data provider calendar date/time YYYY-MM-DD HH:MM:SS gregorian calendar Ablation Ablation measurement from pressure transducer moored from ice cover. The data provider millimeter Stage Stage measurement from pressure transducer moored from the bottom of the lake. The data provider millimeter McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 1 column , https://mcm.lternet.edu/sites/default/files/data/LHBB_PRESS.csv None 2020-09-10 2020-09-10 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