Antarctica

High frequency, 1-min pressure measurements of continuous stage (lake level) and ice surface ablation from Lake Hoare, Antarctica from 2012-2016

Abstract: 

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.

Dataset ID: 

3104

Associated Personnel: 

1042

Short name: 

LHBB_PRESS

Data sources: 

LHBB_PRESS

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.

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