Engineering-geologic maps of northern Alaska, Barrow quadrangle

Williams, John R.; Carter, L.D.

doi:10.3133/ofr84124

Cited by 10 publications

(9 citation statements)

References 69 publications

(91 reference statements)

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“…The study areas are distributed across three major geomorphic units: (1) Tertiary-aged alluvial-marine deposits on the Chukchi coastal plain ("Chukchi sites"), (2) Pleistocene-aged eolian sand deposits of the central Beaufort coastal plain ("Beaufort sites") [22], and (3) Pleistocene-aged yedoma uplands of the Arctic foothills ("foothills sites") [23]. The study area locations were determined by the availability of coincident historical and modern imagery, and field plots sampled during 2010-2012.…”

Section: Study Areamentioning

confidence: 99%

Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska

Frost

Christopherson

Jorgenson³

et al. 2018

Remote Sensing

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Ice-wedge polygons are widespread and conspicuous surficial expressions of ground-ice in permafrost landscapes. Thawing of ice wedges triggers differential ground subsidence, local ponding, and persistent changes to vegetation and hydrologic connectivity across the landscape. Here we characterize spatio-temporal patterns of ice-wedge degradation since circa 1950 across environmental gradients on Alaska's North Slope. We used a spectral thresholding approach validated by field observations to map flooded thaw pits in high-resolution images from circa 1950, 1982, and 2012 for 11 study areas (1577-4460 ha). The total area of flooded pits increased since 1950 at 8 of 11 study areas (median change +3.6 ha; 130.3%). There were strong regional differences in the timing and extent of degradation; flooded pits were already extensive by 1950 on the Chukchi coastal plain (alluvial-marine deposits) and subsequent changes there indicate pit stabilization. Degradation began more recently on the central Beaufort coastal plain (eolian sand) and Arctic foothills (yedoma). Our results indicate that ice-wedge degradation in northern Alaska cannot be explained by late-20th century warmth alone. Likely mechanisms for asynchronous onset include landscape-scale differences in surficial materials and ground-ice content, regional climate gradients from west (maritime) to east (continental), and regional differences in the timing and magnitude of extreme warm summers after the Little Ice Age.

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Section: Study Areamentioning

confidence: 99%

Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska

Frost

Christopherson

Jorgenson³

et al. 2018

Remote Sensing

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“…The fluvial network is incised into this mantle. The Gubik Formation has several distinct facies, including marine sands and silts deposited during transgressive interglacial highstands and (largely stabilized) sand dunes and loess (Williams et al, 1977(Williams et al, , 1978Williams, 1983;Jorgenson et al, 2011). In the Barrow area the coastal region is underlain by diverse facies largely composed of marine sands and silts, with minor gravel.…”

Section: Barrow Alaskamentioning

confidence: 99%

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

et al. 2015

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“…Detailed geologic information may be found in reports by Black (1964), Carlson and others (1958), Collins (1961), Dinter and others (1990), Gryc (1988), Wahrhaftig (1965), and Williams and Carter (1984). As discussed in the later section on hydrology, surface water and shallow ground water in the region are generally isolated from deeper ground water by permafrost.…”

Section: Surficial Geologymentioning

confidence: 98%

Overview of environmental and hydrogeologic conditions at Barrow, Alaska

McCarthy¹

1994

Open-File Report

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Engineering-geologic maps of northern Alaska, Barrow quadrangle

Cited by 10 publications

References 69 publications

Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska

Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

Overview of environmental and hydrogeologic conditions at Barrow, Alaska

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