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- 1Anwar, Taslima
- 1Bandara, Sasiri
- 1Borowiecki, Ryan
- 1Clark, James S.
- 1Horvath, Lajos
- 10Graduate and Postdoctoral Studies (GPS), Faculty of
- 10Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Biological Sciences, Department of
- 1Biological Sciences, Department of/Journal Articles (Biological Sciences)
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Fall 2016
The Alaska Highway through Southwestern Yukon is located in the discontinuous permafrost zone with many areas of the highway corridor associated with degrading permafrost. Given the strategic value of the corridor, it is critical to have a clear understanding of permafrost characteristics and...
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Environmental Controls on Alternating Aragonite-calcite Laminations in Notch-speleothems from Cayman Brac, Cayman Islands, British West Indies
DownloadFall 2017
Speleothems that grow in semi-exposed surface environments, such as wave-cut notches, are not well understood despite their widespread distribution. The +6.4 m-high wave-cut notch on Cayman Brac, that formed ~ 125 ka ago, is decorated with stalactites, stalagmites, and columns that grew between...
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2002
A series of experiments with an ocean general circulation model of the Mediterranean forced by artificial (but realistic) surface fluxes of heat and freshwater are performed. The model has a stable thermohaline circulation under the baseline fluxes. Small decreases in excess evaporation (8%)...
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Fall 2022
In order to understand permafrost and paleoenvironmental conditions in the Mackenzie Delta Region, permafrost cores were collected in the winter of 2017, near the newly developed Inuvik-Tuktoyaktuk Highway (ITH), NWT, by the NWT Geological Survey, NWT Department of Infrastructure, the University...
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Spring 2023
Centennial, millennial and multi-millennial scale climate cycles have been observed in paleoclimate proxies distributed globally. Examples of these cyclical climate cycles include oscillations with periods of ~2.3, ~1.5, ~1, and ≤0.5 thousand years (kyr) in the Quaternary. In the Neogene, longer...
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2001-01-01
Clark, James S., Lewis, Mark A., Horvath, Lajos
For populations having dispersal described by fat‐tailed kernels (kernels with tails that are not exponentially bounded), asymptotic population spread rates cannot be estimated by traditional models because these models predict continually accelerating (asymptotically infinite) invasion. The...
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Paelomagnetic and petromagnetic studies of Chinese Cenozoic sediments: Paleoclimatic, tectonic, and evolutionary implications
DownloadFall 2012
The anisotropy of magnetic susceptibility (AMS) was investigated in three Chinese Loess Plateau sedimentary sections along a W–E transect. Previously published models assumed that winter monsoons were responsible for the magnetic fabric formation of loess sequences. In our new interpretation, the...
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Postglacial Human and Environmental Landscapes of Northeastern Alberta: An analysis of a late Holocene sediment record from Sharkbite Lake, Alberta
DownloadSpring 2019
Sharkbite Lake lies in northeastern Alberta’s lower Athabasca River Valley, within which lies the modern boundaries of the Mineable Oil Sands Region (MOSR). Much of the palaeoecological research to date has addressed the establishment of the Boreal Forest; however, the late Holocene...
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Records of atmospheric mercury deposition and post-depositional mobility in peat permafrost archives from central and northern Yukon, Canada
DownloadFall 2017
Environmental archives provide a feasible means for studying the biogeochemical cycling of heavy metals including mercury (Hg). Although many temperate peat bogs have been successfully used to reconstruct natural and anthropogenic atmospheric Hg deposition fluxes, northern circumpolar permafrost...
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Study of the Chinese loess and Siberian flood basalts: new global scale insights to the paleoclimate and geomagnetic field changes
DownloadSpring 2017
Paleomagnetism, in conjunction with other earth science methods, studies the behavior of the Earth's magnetic field, the drift of tectonic plate, climate and environmental changes. This thesis implements different applications of paleomagnetism to develop a technique to evaluate age for the...