|
CALM SITE U14 |
GALBRAITH LAKE |
|
Site code |
U14 |
|
Site name |
Galbraith Lake Grid |
|
CAPS I Metadata form |
GGD401 |
|
CAPS II Metadata form |
GGD313U_14 |
|
Responsible for data submission |
Vladimir
Romanovsky |
|
Email Address |
ffver”-at”uaf.edu |
|
Institution/Organization |
University
of Alaska-Fairbanks |
|
Location description |
Arctic Alaska |
|
Location Lat. |
68 deg. 29 min. N |
|
Location Lon. |
149 deg. 30 min. W |
|
Elevation avg. (m) |
823 |
|
Methods Grid |
100 |
|
Methods Other |
Air Temperature, Soil temperature, Snow cover |
|
Landscape Description |
Broad
glaciated mountain valley |
|
Vegetation /Classification |
Graminoid-moss tundra and graminoid,
prostrate-dwarf-shrub, moss tundra (wet and moist nonacidic) |
|
Soils (or Material) |
Ruptic-Histic Aquiturbel |
|
Thaw depth measurements (year started)
|
1996 |
|
Air temp. measurements (year started) |
1997 |
|
Snow cover measurements (year started) |
NA |
|
soil
temp. measurements (year started) |
1997 |
|
soil moisture measurements (year started) |
1999 |
|
general description of soil moisture (dry, moist, wet, saturated) |
Wet |
|
soil texture: if non organic describe texture, if organic
indicate thickness of organic layer (cm) |
Ruptic-Histic
Aquiturbel. Organic layer thickness is 27 cm |
DESCRIPTION OF AREA CONTAINING SITE:
Broad
glaciated mountain valley. Landcover units
include Graminoid-moss tundra and graminoid, prostrate-dwarf-shrub,
moss tundra (wet and moist nonacidic).
SOIL DESCRIPTION:
(predominant texture, i.e., ‘sand’, ‘gravel’,
‘peat’, etc.): Ruptic-Histic Aquiturbel. Organic layer thickness is 27 cm
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.
REFERENCES:
Walker,
D. A., H. E. Epstein, W. A. Gould, A. Kade, A.M.
Kelley, J. A. Knudson, W. B. Krantz, R. A. Peterson,
G. Michaelson, R.A. Peterson, C. L. Ping, M. A. Raynolds, V. E. Romanovsky, Y. Shur,
and M.D. Walker, Frost-boil ecosystems: complex interactions between landforms,
soils, vegetation, and climate, Permafrost and Periglacial Processes, 15:
171-188, 2004.
Sturm,
M., Schimel, J., Michelson, G., Welker, J., Oberbauer, S. F., Liston, G. E., Fahnestock,
J., and V. E. Romanovsky, Are winter biological processes important in
converting arctic tundra to shrubland?, BioScience, Vol. 55, No. 1: 17 26, 2005.
Shimel, J. P., Fahnstock,
J., Michaelson, G. J., Mican,
C., Ping, C., Romanovsky, V. E. and J. Welker, A microbial activity based model
of winter CO2 fluxes in Arctic tundra communities, Arctic, Antarctic, and
Alpine Research,Vol. 38, No.
2, 249-256, 2006.
Kade, A., Romanovsky, V. E. and D. A.
Walker, The N-factor of nonsorted
circles along a climate gradient in Arctic Alaska, Permafrost and Periglacial
Processes, 17: 279-289, 2006.
Nicolsky, D. J., Romanovsky, V. E., Alexeev, V. A. and D. M. Lawrence, Improved modeling of
permafrost dynamics in Alaska with CLM3, Geophysical Research Letters, VOL. 34,
L08501, doi:10.1029/2007GL029525, 2007.
Nicolsky, D. J., Romanovsky, V.E., and G. S.Tipenko, Using in-situ temperature measurements to
estimate saturated soil thermal properties by solving a sequence of
optimization problems, The Cryosphere, 1, 41 58,
2007.
Brown,
J. and V. E. Romanovsky, Report from the International Permafrost Association:
State of Permafrost in the First Decade of the 21st Century, Permafrost and
Periglacial Processes, 19: 255 260, 2008.
Nicolsky, D. J., Romanovsky,
V.E., Tipenko, G. S., and D. A. Walker, Modeling biogeophysical interactions in non-sorted circles in the
Low Arctic, Journal of Geophysical Research, in press
Walker,
D.A., H.E. Epstein, V.E. Romanovsky, C.L. Ping, G.J. Michaelson, R.P. Daanen, Y. Shur, R.A. Peterson, W.B. Krantz,
M.K. Raynolds, W.A. Gould,
G.
Gonzalez, D.J. Nicolsky, C.M. Vonlanthen,
A.N. Kade, P. Kuss, A.M.
Kelley, C.A. Munger, C.T. Tarnocai,
N.V. Matveyeva, and F.J.A. DaniКls,
Arctic patterned-ground ecosystems: a synthesis of studies along a north
American arctic transect, Journal of Geophysical Research, in press
Nicolsky, D. J., Tipenko,
G. S., Romanovsky, V. E. and D. A. Walker, Modeling Observed Differential Frost
Heave within Non-Sorted Circles in Alaska, In Proceedings of the Ninth
International Conference on Permafrost, June 29-July 3, Fairbanks, Alaska,
2008, in press
Romanovsky,
V. E., Marchenko, S. S., Daanen, R., Nicolsky, D. J., Sergeev, D. O.,
and D. A. Walker, Soil climate and frost heave along the Permafrost/Ecological
North American Arctic Transect, In Proceedings of the Ninth International
Conference on Permafrost, June 29-July 3, Fairbanks, Alaska, 2008, in press
Only thaw depth data determined by
mechanical probing is reported on CALM website. For additional data refer to http://www.gi.alaska.edu/snowice/Permafrost-lab/index.html
or contact site investigators directly
