scholarly journals Comparison of model-produced active layer fields: Results for northern Alaska

2007 ◽  
Vol 112 (F2) ◽  
Author(s):  
Nikolay I. Shiklomanov ◽  
Oleg A. Anisimov ◽  
Tingjun Zhang ◽  
Sergey Marchenko ◽  
Frederick E. Nelson ◽  
...  
Keyword(s):  
Active Layer ◽  
Northern Alaska

SPECTRAL SIGNATURE OF COUPLED FLOW IN THE REFREEZING ACTIVE LAYER, NORTHERN ALASKA

1992 ◽  
Vol 13 (3) ◽  
pp. 273-284 ◽  
Author(s):  
Samuel I. Outcalt ◽  
Kenneth M. Hinkel ◽  
Frederick E. Nelson
Keyword(s):  
Active Layer ◽  
Spectral Signature ◽  
Coupled Flow ◽  
Northern Alaska

Spatial variability of permafrost active-layer thickness under contemporary and projected climate in Northern Alaska

2012 ◽  
Vol 35 (2) ◽  
pp. 95-116 ◽  
Author(s):  
Dmitry A. Streletskiy ◽  
Nikolay I. Shiklomanov ◽  
Frederick E. Nelson
Keyword(s):  
Spatial Variability ◽  
Layer Thickness ◽  
Active Layer ◽  
Active Layer Thickness ◽  
Northern Alaska

scholarly journals Permafrost thaw and ground settlement considering long-term climate impact in northern Alaska

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Zhaohui Joey Yang ◽  
Kannon C. Lee ◽  
Haibo Liu
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Air Temperature ◽  
Climate Model ◽  
Ground Surface ◽  
Active Layer Thickness ◽  
Near Surface ◽  
Surface Conditions ◽  
Ice Content ◽  
Northern Alaska

AbstractAlaska’s North Slope is predicted to experience twice the warming expected globally. When summers are longer and winters are shortened, ground surface conditions in the Arctic are expected to change considerably. This is significant for Arctic Alaska, a region that supports surface infrastructure such as energy extraction and transport assets (pipelines), buildings, roadways, and bridges. Climatic change at the ground surface has been shown to impact soil layers beneath through the harmonic fluctuation of the active layer, and warmer air temperature can result in progressive permafrost thaw, leading to a deeper active layer. This study attempts to assess climate change based on the climate model data from the fifth phase of the Coupled Model Intercomparison Project and its impact on a permafrost environment in Northern Alaska. The predicted air temperature data are analyzed to evaluate how the freezing and thawing indices will change due to climate warming. A thermal model was developed that incorporated a ground surface condition defined by either undisturbed intact tundra or a gravel fill surface and applied climate model predicted air temperatures. Results indicate similar fluctuation in active layer thickness and values that fall within the range of minimum and maximum readings for the last quarter-century. It is found that the active layer thickness increases, with the amount depending on climate model predictions and ground surface conditions. These variations in active layer thickness are then analyzed by considering the near-surface frozen soil ice content. Analysis of results indicates that thaw strain is most significant in the near-surface layers, indicating that settlement would be concurrent with annual thaw penetration. Moreover, ice content is a major factor in the settlement prediction. This assessment methodology, after improvement, and the results can help enhance the resilience of the existing and future new infrastructure in a changing Arctic environment.

scholarly journals Concepts of Soil Formation and Classification in Arctic Regions

ARCTIC ◽  
1958 ◽  
Vol 11 (3) ◽  
pp. 166 ◽  
Author(s):  
J.C.F. Tedrow ◽  
J.E. Cantlon
Keyword(s):  
Active Layer ◽  
Soil Formation ◽  
Tundra Soils ◽  
Arctic Regions ◽  
Arctic Soils ◽  
Free Drainage ◽  
Soil Forming Processes ◽  
Moisture Conditions ◽  
Northern Alaska ◽  
Selective Influence

Discusses, on basis of studies in northern Alaska, soil forming processes in arctic regions and considers the relation between vegetation and soils and problems of classification and mapping. Tundra soils are poorly drained, mineral in nature, and underlain by permafrost at depths of 1-2 ft Arctic brown soils form under free drainage, are mineral in character, and confined to ridges, terrace edges, and stabilized dunes. The active layer in such soils is usually deep. Downslope movement and frost action tend to disrupt any orderly morphology in both wet and well-drained sites. Moisture conditions in arctic soils exert a marked selective influence on vegetation.--from SIPRE.

Degradation Analysis and Degradation Suppression Technology Caused by Light Absorption at Active Layer Facet of GaInAsP Laser Diode

2008 ◽  
Vol 128 (5) ◽  
pp. 732-737
Author(s):  
Hiroyuki Ichikawa ◽  
Masashi Ito ◽  
Chie Fukuda ◽  
Kotaro Hamada ◽  
Akira Yamaguchi ◽  
...  
Keyword(s):  
Active Layer ◽  
Laser Diode ◽  
Light Absorption ◽  
Degradation Analysis
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