LHBB_PRESS English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2020-09-10 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) High frequency, 1-min pressure measurements of continuous stage (lake level) and ice surface ablation from Lake Hoare, Antarctica from 2012-2016 2020-09-10 publication Hilary Dugan University of Wisconsin hdugan@wisc.edu https://dugan.limnology.wisc.edu pointOfContact Peter Doran Louisiana State University http://lsu.edu pdoran@lsu.edu https://www.lsu.edu/science/geology/people/faculty/doran.php pointOfContact documentDigital 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. Name: Renée F. Brown Role: data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact disturbance theme LTER Core Areas English 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 -77.639259338379 -77.623085021973 ground condition 2012-10-28 2016-10-22 https://mcm.lternet.edu/sites/default/files/data/LHBB_PRESS.csv LHBB_PRESS eng; US McMurdo Dry Valleys LTER LHBB_PRESS Data Source Definition : Lake Hoare 1-min Pressure Data Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATASET_CODE Internal dataset code. DATE_TIME Date and time the sample was taken. Date Time Format: YYYY-MM-DD HH:MM:SS ABLATION_MM Ablation measurement from pressure transducer moored from ice cover. STAGE_MM Stage measurement from pressure transducer moored from the bottom of the lake. DBF https://mcm.lternet.edu/sites/default/files/data/LHBB_PRESS.csv dataset 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact