|
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-“gwu.edu |
|
Institution/Organization |
GWU |
|
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.
