CALM SITE U7C |
BETTY PINGO WET |
Site code |
U7C |
Site name |
Betty Pingo WET (former FLUX 2) |
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. |
70.2750 N |
Location Lon. |
148.9190 W |
Elevation avg. (m) |
12 |
Methods Grid |
100 |
Methods Other |
Air Temperature, Soil Surface Temperature |
Landscape Description |
Outer coastal plain, drained lake basins |
Vegetation /Classification |
Flat with
low-centered polygons; wet nonacidic tundra |
Soils (or Material) |
Histic Pergelic Cryaquolls
(39%), P. Cryaquolls (25%), P.Cryofibrists
(24%), others (12%). |
Thaw depth measurements (year started)
|
1995 |
Air temp. measurements (year started) |
1995 |
Snow cover measurements (year started) |
NA |
soil
temp. measurements (year started) |
1995 (surface only) |
soil moisture measurements (year started) |
NA |
general description of soil moisture (dry, moist, wet,
saturated) |
Very wet to
saturated |
soil texture: if non organic describe texture, if organic
indicate thickness of organic layer (cm) |
Organic
layer thickness: 25 +/- 1.5 cm mineral texture -- silty loam /silt/peat |
DESCRIPTION OF AREA CONTAINING SITE:
Site description: Flat with low-centered
polygons; wet nonacidic tundra.
Vegetation communities: (1) Lower
microsites, including polygon basins and troughs: Wet Eriophorurn
angustifolium, Carex aquatilis, Scorpidiurn
scorpioides graminoid
tundra. (2) Raised microsites, including polygon rims and hummocks: Moist Eriophorum triste, Dryas integrifolia,
Tomenthypnum nitens graminoid, prostrate-shrub tundra. Cover of top 5 species: Eriophorum angustifolim (28%), Scorpidium scorpioides (11%), Carex aquatilis (10%), Drepanocladus brevifolius (3%),Dryas integrifolia (3%)
Mean vegetation height: 4.1 +/- 3.9
cm
Mean live moss layer thickness: 0.8
+/- 0.7 cm
Organic layer thickness: 25 + 1.5
cm.
(Walker and Bockheim,
1995)
SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.): Pergelic Cryoborolls
(55%), P. Cryaquolls (16%), P. Cryaquepts
(16%), others (13%).
SAMPLING DESIGN AND METHOD:
Beginning in 1995, 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 each
site, one thermistor was placed in a radiation shield approximately 2 m above
the ground surface, and nine loggers were placed at the interface between
mineral soil and organic material in various microtopographic
positions within the site. 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:
Walker, D. A., and J. G. Bockheim, Site selection for the portable flux towers,
ARCSS/LAII/Flux Study, 13–16 June 1995, Summary of field activities,
Land-Atmos.-Ice Interact. Sci. Manage. Off., Geophys. Inst.,Univ.
of Alaska-Fairbanks, 1995.
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.
Additional
Climate data are also available at http://www.uaf.edu/water/projects/NorthSlope/coastal_plain/betty/betty.html