|
CALM SITE U9B |
HAPPY VALLEY 1-km GRID |
|
Site code |
U9B |
|
Site name |
Happy Valley |
|
CAPS I Metadata form |
GGD359 |
|
CAPS II Metadata form |
GGD313U_10 |
|
Responsible for data submission |
Nikolay
Shiklomanov |
|
Email Address |
shiklom”-at-“udel.edu |
|
Institution/Organization |
University
of Delaware |
|
Location description |
Arctic Alaska |
|
Location Lat. |
69 deg. 06 min. N |
|
Location Lon. |
148 deg. 30 min. W |
|
Elevation avg. (m) |
305 |
|
Methods Grid |
1000 |
|
Methods Other |
Air
Temperature, Soil temperature, Soil Moisture |
|
Landscape Description |
Unglaciated
foothills |
|
Vegetation /Classification |
Tussock-graminoid, dwarf-
shrub tundra and low-shrub tundra (moist acidic) |
|
Soils (or Material) |
Ruptic-Histic
Aquiturbel |
|
Thaw depth
measurements (year started)
|
1995 |
|
Air temp.
measurements (year started) |
1995 |
|
Snow cover
measurements (year started) |
NA |
|
soil temp.
measurements (year started) |
2003 |
|
soil
moisture measurements (year started) |
NA |
|
general
description of soil moisture (dry, moist, wet, saturated) |
Dry on top of the ridges, wet to saturated in the
valley (Vol MC 43%) |
|
soil
texture: if non organic describe texture, if organic indicate thickness of
organic layer (cm) |
Organic Layer thikness:27(cm); mineral texture
– silt |
DESCRIPTION OF AREA CONTAINING SITE:
The Happy Valley site occupies gentle, loess-covered
hills with water tracks and a stream in the southeast corner. The vegetation is
moist acidic tundra, with shrubs (willow) in the water tracks and riparian zone
(Hinkel & Nelson, 2003).
SOIL DESCRIPTION: (predominant texture, i.e., ‘sand’,
‘gravel’, ‘peat’, etc.): Glacic
Hystoturbel
SAMPLING DESIGN AND METHOD:
1-sq km grid consists of a square array of surveyed
permanent stakes separated by 100 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.
REFERENCES:
Hinkel, K.M. & Nelson, F.E. 2003. Spatial and temporal patterns of
active layer thickness at Circumpolar Active Layer Monitoring (CALM) sites in
northern Alaska, 1995-2000. Journal of Geophysical Research, Vol.108, No.
D2, 8168.
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.