CALM SITE U56 |
56 MILE |
Site code |
U56 |
Site name |
56 Mile (from Deadhorse) Dalton
Highway |
CAPS I Metadata form |
NA |
CAPS II Metadata form |
NA |
Responsible for data submission |
Nikolay
Shiklomanov |
Email Address |
shiklom”-at-“gwu.edu |
Institution/Organization |
GWU |
Location description |
Arctic Alaska |
Location Lat. |
69.69695
N |
Location Lon. |
148.682 W |
Elevation avg. (m) |
349 |
Methods Grid |
100 |
Methods Other |
Air Temperature, Soil surface temperature |
Landscape Description |
Inner coastal
plain |
Vegetation /Classification |
Wet tundra |
Soils (or Material) |
Pergelic cryorthents |
Thaw depth measurements (year started)
|
1996 |
Air temp. measurements (year started) |
1995 |
Snow cover measurements (year started) |
NA |
Soil temp. measurements (year started) |
1996 (soil surface only) |
soil moisture measurements (year started) |
NA |
general description of soil moisture (dry, moist, wet,
saturated) |
wet to
saturated |
soil texture: if non organic describe texture, if organic
indicate thickness of organic layer (cm) |
Organic Layer
thikness:NA; mineral texture -- silty loam /silty
clay |
DESCRIPTION OF AREA CONTAINING SITE:
Wet tundra
SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.):
Pergelic
cryorthents
SAMPLING DESIGN AND METHOD:
Beginning in 1996, the active layer
has been probed at least annually at the site. The procedure involves pushing a
metal rod, calibrated in cm, to the point of refusal, interpreted in most cases
to be the frost table. Thaw depth measurements at each site were obtained by
probing at 5 m intervals along the plot’s two perpendicular and one
diagonal transect, resulting in 71 points per plot per probing date.
In 1995
the site was instrumented with several OnsetTM
portable data loggers connected to probe-type thermistors. Each
logger/thermistor system has an effective temperature range of -50oC
to +33oC and resolution of approximately 0.32oC. At the
site, one thermistor was placed in a radiation shield approximately 2 m above
the ground surface, and one thermistor placed at the interface between mineral
soil and organic material within the proximity of the mast. Temperature
measurements were collected at, 1 hr, and 2 hr intervals depending on season,
and year. Details on
methodology are provided in Klene et. al 2001.
REFERENCES:
Shiklomanov, N.I. and F.E. Nelson. 2003 Climatic
variability in the Kuparuk region, north-central
Alaska: optimizating spatial and temporal
interpolation in a sparse observation network. Arctic, 56: 136-146.
Shiklomanov, N.I. and F.E.
Nelson. 2003 Statistical
representation of landscape-specific active-layer variability. In Phillips, M., Springman,
S. M., and Arenson, L. U. (eds.), Proceedings of
the Eighth International Conference on Permafrost, vol. 2. Lisse: A.A. Balkema, 1039-1044.
Walker
D.A., Jia G.J., Epstein H.E., Raynolds
M.K., Chapin III F.S., Copass C., Hinzman
L.D., Kane D., Knudson J.A., Maier H., Michaelson G.J., Nelson F.E., Ping C.L.,
Shiklomanov N.I., Romanovsky
V.E., Shur Y.
2003 Vegetation-soil-thaw-depth relationships along a Low Arctic
bioclimatic gradient, Alaska: Synthesis of information from the Atlas studies. Permafrost and
Periglacial Processes, 14:
103-123.
Shiklomanov N. I. and F. E.
Nelson, F. E., 2002. Active-layer mapping at regional scales: a 13-year spatial
time series for the Kuparuk region, north-central Alaska.
Permafrost and Periglacial Processes,
13: 219-230.
Klene
A.E., Nelson F.E., and N.I. Shiklomanov. 2001 The n-factor as a tool in geocryological mapping: seasonal thaw in the Kuparuk River Basin, Alaska. Physical
Geography, 22(6): 449-466.
Klene
A.E., Nelson F.E., Shiklomanov N.I., and K.M. Hinkel. 2001 The n-factor in natural
landscapes: Variability of air and soil-surface temperatures, Kuparuk River basin, Alaska. Arctic,
Antarctic and Alpine Research, 33(2): 140-148.
Nelson,
F.E., Shiklomanov, N.I., and G.R. Mueller. Variability of active-layer
thickness at multiple spatial scales, north-central Alaska, USA. 1999 Arctic, Antarctic, and Alpine Research, 31(2): 179-186.
Shiklomanov,
N.I. and F.E. Nelson. Analytic representation of the active layer thickness
field, Kuparuk River basin, Alaska. 1999 Ecological Modelling, 123: 105-125.
Bockheim, J.G., Walker, D.A., Everett, L.R.,
Nelson, F.E. and N.I. Shiklomanov. 1998 . Soils and cryoturbation in moist
nonacidic and acidic tundra in the Kuparuk River
basin, Arctic Alaska, USA. Arctic and
Alpine Research, 30(2): 166-174.
Nelson,
F.E., Hinkel, K.M., Shiklomanov, N.I., Mueller, G.R., Miller, L.L., and D.A.
Walker.
Active-layer thickness in north central Alaska: systematic sampling, scale, and
spatial autocorrelation. 1998
Journal of Geophysical
Research-Atmospheres, 103(D22): 28963-28973.
Nelson,
F.E., Outcalt, S.I., Brown, J., Shiklomanov, N.I.,
and K.M. Hinkel. Spatial and temporal attributes of the active-layer thickness
record, Barrow, Alaska, USA, 1998
Proceedings of the Seventh
International Conference on Permafrost. Centre de etudes nordiques de l'Universite Laval,
Laval, Quebec, Canada, Yellowknife, NWT, Canada, pp. 797-802
Walker,
D.A., Auerbach, N.A., Bockheim,
J.G., Chapin, F.S., Eugster, W., King, J.Y.,
McFadden, J.P., Michaelson, G.J., Nelson, F.E., Oechel,
W.C., Ping, C.L., Reeburg, W.S., Regli,
S., Shiklomanov, N.I., and G.L. Vourlitis.1998 Energy and trace-gas fluxes
across a soil pH boundary in the arctic. Nature,
394(6692): 469-472.
Nelson
F.E., Shiklomanov, N.I., Mueller G.R., Hinkel K.M., Walker D.A., and J.G.
Bockheim.1997 Estimating active-layer thickness over a large region: Kuparuk River basin, Alaska, USA. Arctic and Alpine Research, 29(4): 167-378.