scholarly journals Archaeal and bacterial communities across a chronosequence of drained lake basins in arctic alaska

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
J. Kao-Kniffin ◽  
B.J. Woodcroft ◽  
S.M. Carver ◽  
J.G. Bockheim ◽  
J. Handelsman ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Arctic Alaska ◽  
Lake Basins

Carbon Pools and Accumulation Rates in an Age-Series of Soils in Drained Thaw-Lake Basins, Arctic Alaska

2004 ◽  
Vol 68 (2) ◽  
pp. 697-704 ◽  
Author(s):  
J. G. Bockheim ◽  
K. M. Hinkel ◽  
W. R. Eisner ◽  
X. Y. Dai
Keyword(s):  
Carbon Pools ◽  
Accumulation Rates ◽  
Arctic Alaska ◽  
Age Series ◽  
Lake Basins

scholarly journals Seasonal thaw settlement at drained thermokarst lake basins, Arctic Alaska

2014 ◽  
Vol 8 (3) ◽  
pp. 815-826 ◽  
Author(s):  
L. Liu ◽  
K. Schaefer ◽  
A. Gusmeroli ◽  
G. Grosse ◽  
B. M. Jones ◽  
...  
Keyword(s):  
Surface Deformation ◽  
Active Layer Thickness ◽  
Surface Dynamics ◽  
Thermokarst Lake ◽  
The North ◽  
Arctic Alaska ◽  
North Slope Of Alaska ◽  
Thaw Settlement ◽  
Ground Penetrating ◽  
Lake Basins

Abstract. Drained thermokarst lake basins (DTLBs) are ubiquitous landforms on Arctic tundra lowland. Their dynamic states are seldom investigated, despite their importance for landscape stability, hydrology, nutrient fluxes, and carbon cycling. Here we report results based on high-resolution Interferometric Synthetic Aperture Radar (InSAR) measurements using space-borne data for a study area located on the North Slope of Alaska near Prudhoe Bay, where we focus on the seasonal thaw settlement within DTLBs, averaged between 2006 and 2010. The majority (14) of the 18 DTLBs in the study area exhibited seasonal thaw settlement of 3–4 cm. However, four of the DTLBs examined exceeded 4 cm of thaw settlement, with one basin experiencing up to 12 cm. Combining the InSAR observations with the in situ active layer thickness measured using ground penetrating radar and mechanical probing, we calculated thaw strain, an index of thaw settlement strength along a transect across the basin that underwent large thaw settlement. We found thaw strains of 10–35% at the basin center, suggesting the seasonal melting of ground ice as a possible mechanism for the large settlement. These findings emphasize the dynamic nature of permafrost landforms, demonstrate the capability of the InSAR technique to remotely monitor surface deformation of individual DTLBs, and illustrate the combination of ground-based and remote sensing observations to estimate thaw strain. Our study highlights the need for better description of the spatial heterogeneity of landscape-scale processes for regional assessment of surface dynamics on Arctic coastal lowlands.

scholarly journals Seasonal thaw settlement at drained thermokarst lake basins, Arctic Alaska

2013 ◽  
Vol 7 (6) ◽  
pp. 5793-5822
Author(s):  
L. Liu ◽  
K. Schaefer ◽  
A. Gusmeroli ◽  
G. Grosse ◽  
B. M. Jones ◽  
...  
Keyword(s):  
Surface Deformation ◽  
Active Layer Thickness ◽  
Surface Dynamics ◽  
Thermokarst Lake ◽  
Arctic Alaska ◽  
Thaw Settlement ◽  
Ground Penetrating ◽  
Prudhoe Bay ◽  
Lake Basins

Abstract. Drained thermokarst lake basins (DTLBs) are ubiquitous landforms on arctic tundra lowlands, but their present-day dynamic states are seldom investigated. Here we report results based on high-resolution Interferometric Synthetic Aperture Radar (InSAR) measurements using space-borne data for a study area located near Prudhoe Bay, Alaska where we focus on the seasonal thaw settlement within DTLBs, averaged between 2006 and 2010. The majority (14) of the 18 DTLBs in the study area analyzed exhibited seasonal thaw settlement of 3–4 cm. However, four of the DTLBs analyzed exceeded 4 cm of thaw settlement, with one basin experiencing up to 12 cm. Combining the InSAR observations with the in situ active layer thickness measured using ground penetrating radar and mechanical probing, we calculated thaw strain, an index of thaw settlement strength along a transect across the basin that underwent large thaw settlement. We found thaw strains of 10–35% at the basin center, suggesting the seasonal melting of ground ice as a possible mechanism for the large settlement. These findings emphasize the dynamic nature of permafrost landforms, demonstrate the capability of the InSAR technique to remotely monitor surface deformation of individual DTLBs, and illustrate the combination of ground-based and remote sensing observations to estimate thaw strain. Our study highlights the need for better description of the spatial heterogeneity of landscape-scale processes for regional assessment of surface dynamics on arctic coastal lowlands.

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