Holocene pore‐ice δ 18 O and δ 2 H records from drained thermokarst lake basins in the Old Crow Flats, Yukon, Canada

2020 ◽  
Vol 31 (4) ◽  
pp. 497-508
Author(s):  
Sasiri Bandara ◽  
Duane Froese ◽  
Trevor J. Porter ◽  
Fabrice Calmels
Keyword(s):  
Thermokarst Lake ◽  
Old Crow Flats ◽  
Lake Basins

scholarly journals Peat accumulation in drained thermokarst lake basins in continuous, ice-rich permafrost, northern Seward Peninsula, Alaska

2012 ◽  
Vol 117 (G2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Miriam C. Jones ◽  
Guido Grosse ◽  
Benjamin M. Jones ◽  
Katey Walter Anthony
Keyword(s):  
Peat Accumulation ◽  
Thermokarst Lake ◽  
Seward Peninsula ◽  
Lake Basins

scholarly journals Correction: Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada)

2021 ◽  
pp. 1-3
Author(s):  
Jana M.E. Tondu ◽  
Kevin W. Turner ◽  
Johan A. Wiklund ◽  
Brent B. Wolfe ◽  
Roland I. Hall ◽  
...  
Keyword(s):  
Thermokarst Lake ◽  
Old Crow Flats

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 Vegetation Succession and Environmental Conditions following Catastrophic Lake Drainage in Old Crow Flats, Yukon

ARCTIC ◽  
2017 ◽  
Vol 70 (2) ◽  
pp. 177 ◽  
Author(s):  
Trevor C. Lantz
Keyword(s):  
Vegetation Succession ◽  
Wildlife Habitat ◽  
Soil Conditions ◽  
Field Sampling ◽  
Vegetation Development ◽  
Lake Drainage ◽  
Local Hydrology ◽  
Old Crow Flats ◽  
Lake Basins

Increases in the frequency and magnitude of disturbances associated with the thawing of ice-rich permafrost highlight the need to understand long-term vegetation succession in permafrost environments. This study uses field sampling and remote sensing to explore vegetation development and soil conditions following catastrophic lake drainage in Old Crow Flats (OCF). The data presented show that vegetation on drained lake basins in OCF is characterized by two distinct assemblages: tall willow stands and sedge swards. Field sampling indicates that these alternative successional trajectories result from variation in soil moisture following drainage. Increased willow mortality on older drained basins suggests that intraspecific competition drives self-thinning in shrub thickets. This finding, combined with data from paleoecological studies and contemporary vegetation in OCF, suggests that willow stands on drained lake basins are seral communities. These results also indicate that the increase in number of catastrophic drainages that occurred between 1972 and 2010 will alter regional vegetation in ways that affect wildlife habitat, permafrost conditions, and local hydrology.

scholarly journals Characterizing Post-Drainage Succession in Thermokarst Lake Basins on the Seward Peninsula, Alaska with TerraSAR-X Backscatter and Landsat-based NDVI Data

2012 ◽  
Vol 4 (12) ◽  
pp. 3741-3765 ◽  
Author(s):  
Prajna Regmi ◽  
Guido Grosse ◽  
Miriam Jones ◽  
Benjamin Jones ◽  
Katey Anthony
Keyword(s):  
Thermokarst Lake ◽  
Seward Peninsula ◽  
Lake Basins

scholarly journals Limnological evolution of Zelma Lake, a recently drained thermokarst lake in Old Crow Flats (Yukon, Canada)

2017 ◽  
Vol 3 (2) ◽  
pp. 220-236 ◽  
Author(s):  
Jana M.E. Tondu ◽  
Kevin W. Turner ◽  
Johan A. Wiklund ◽  
Brent B. Wolfe ◽  
Roland I. Hall ◽  
...  
Keyword(s):  
Light Availability ◽  
Drainage Water ◽  
Low Light ◽  
Site Specific ◽  
Thermokarst Lake ◽  
Warming Climate ◽  
Lake Drainage ◽  
Geochemical Variables ◽  
Old Crow Flats

Evidence from remote sensing studies suggests that the frequency of thermokarst lake drainage events is increasing in response to climate change, but the consequences of these changes on the limnology of remaining waterbodies remain unknown. Here, we utilize a multiparameter paleolimnological record and post-drainage water isotope and chemistry monitoring to characterize the limnological evolution of Zelma Lake in Old Crow Flats, Yukon. During the early part of the record (~1678 to 1900 CE), analysis of geochemical variables and algal pigments indicate relatively stable limnological conditions. Abruptly beginning at ~1900, Zelma Lake experienced a 40 year phase of reduced production, likely resulting from thermokarst shoreline expansion and associated increases in turbidity and low light availability. This was followed by ~70 years of increasing production, likely from the stabilization of shorelines combined with a warming climate. Zelma Lake catastrophically drained in June 2007. Post-drainage conditions were characterized by intense eutrophication marked by increases in nutrient and major ion concentrations and the unprecedented occurrence of okenone and diatoxanthin pigments. Comparison to the post-drainage paleolimnological record from another thermokarst lake in Old Crow Flats indicates that a sharp increase of production is likely a common outcome of thermokarst lake drainage, yet intensity differs owing to site-specific catchment characteristics.

Sign in / Sign up

Export Citation Format

Share Document