|
CALM SITE U40a |
MENTASTA FEN Wrangell – St. Elias National Park and Preserve, Alaska |
|
Site code |
U40A |
|
Site name |
Mentasta Fen |
|
CAPS I Metadata form |
NA |
|
CAPS II Metadata form |
NA |
|
Responsible for data submission |
Chris
Arp1, Trey Simmons2 |
|
Email Address |
“carp”-at-“usgs.gov”;
“Trey_Simmons”-at-“nps.gov”
|
|
Institution/Organization |
1USGS Alaska Science
Center, 2 NPS Central Alaska Inventory and Monitoring Network |
|
Location description |
Alaska, Wrangell – St.
Elias National Park and Preserve |
|
Location Lat. |
N
62° 33.097’ |
|
Location Lon. |
W
143° 22.385’ |
|
Elevation avg. (m) |
1000 |
|
Methods Grid |
100 |
|
Methods Other |
Air Temperature, Soil temperature,
Snow cover |
|
Landscape Description |
Valley
toe-slope to valley bottom |
|
Vegetation /Classification |
boreal
lowland tussock – scrub bog |
|
Soils (or Material) |
organic-rich
soils overlying glacial deposits, glaciofluvial
outwash, and
lacustrine deposits |
|
Thaw depth measurements (year
started)
|
2009 |
|
Air temp. measurements (year
started) |
2009 |
|
Snow cover measurements (year
started) |
NA |
|
soil temp. measurements (year started) |
2009 |
|
soil moisture measurements (year
started) |
2009 |
|
general description of soil
moisture (dry, moist, wet, saturated) |
NA |
|
soil texture: if non organic
describe texture, if organic indicate thickness of organic layer (cm) |
Moderate
thickness organic-rich horizon and peat overlying lacustrine clay, |
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)
SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.): Typic Historthels,
Terric Hemistels, Typic Aquorthels, Typic Fibristels.
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.
REFERENCES:
Only thaw depth data determined by mechanical probing is
reported on CALM website. For additional data contact site investigators
directly