Time Series Datasets (more coming soon)
Teshekpuk Lake Ice-Off Trend, 1974-2014
Day of the year for complete ice-off on Teshekpuk Lake from 1974 to 2014. This was determined using a variety of remotely sensed imagery from the satellite image archive. Ice-off day is portrayed as the mid-point between the day with the last image showing ice on the lake and the next available image showing zero ice on the lake.
Teshekpuk Lake Surface Temperature, 2007-2012
Daily mean surface water temperatures (1 m depth) for Teshekpuk Lake from September 2007 to August 2012. Variation in summertime lake temperatures reflect differences in ice-out among years as well as summertime air temperature. Variation in wintertime temperatures reflect differences in air temperature among years as well as ice-on timing, snow accumulation on lake ice surface, and growth of lake ice.
Ground temperature data, 2009-2012
TLO daily mean ground temperature data measured at 0.15 m and 1.50 m depth from 2009 to 2012. Over the short period of record, seasonal thaw of the ground at the 0.15 m depth occurred on 09 July 2010, 03 July 2011, and 24 June 2012. Whereas, initial freezing of the ground at the 0.15 m depth occurred on 21 September 2009, 24 September 2010, and 26 September 2011.
Ground temperature data, 2011-2012
TLO daily mean ground temperature data from 15 August 2011 to 15 August 2012 measured at depths of 0.10 m, 0.25 m, 0.50 m, 0.75 m, 1.00 m, 1.50 m, 2.00 m, 3.00 m. Visible in the graph are differences in the active layer thickness between 2011 and 2012. In 2011, the temperature at 25 cm rose above freezing for only two days. Whereas in 2012, the temperature at 25 cm rose above freezing by the last week of July and continued to increase until the data logger was downloaded. This site contributes to the NSF-funded Thermal State of Permafrost program.
NSF CALON Datasets, 2012-2013
The Circum-Arctic Lakes Observation Network provides time series and point sampling datasets on approximately 70 lakes in northern Alaska. Six of these lakes are located in the Teshekpuk Lake region. The four scientific goals of CALON are to: (1) Develop a network of regionally representative lakes along environmental gradients from which physical, chemical, and biological lake data are collected; (2) Implement a multiscale (hierarchical) lake instrumentation scheme; (3) Upscale field measurements using remotely sensed imagery; and (4) Develop and implement standardized protocols to enable inter-site comparison and to prepare for expansion towards a pan-Arctic network. Datasets from the CALON project can be accessed through the Arctic Observation Network data repository: ACADIS.