Created: 2014-02-03 09:20:38
Modified: 2014-02-03 09:21:46
DESCRIPTION OF AREA CONTAINING SITE:
Valley toe-slope to valley bottom boreal lowlands with organic-rich soils overlying glacial deposits, glaciofluvial outwash, and lacustrine deposits (Ecotype: boreal lowland tussack – scrub bog)
SAMPLING DESIGN AND METHOD:
1 ha grid consists of a square array of surveyed permanent stakes separated by 10 m, yielding an 11 × 11 array of sampling nodes on each grid. Thaw depth and snow sampling was conducted twice by manual probing at each stake. The two values for each sampling point are averaged, yielding a maximum of 121 data points per grid per probing date. The active layer was not measured at locations where grid points intersect rocks or deep water.
4-channel temperature loggers (HOBO U12 with HOBO TMC6-HD temperature sensors) installed to 10, 50, 100, 150 cm depth logging at 4 hr intervals. Shallow well installed with pressure transducer (HOBO U20-001) to record water level and temperature at 4 hr interval.
CALM USA NPS/USGS
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