| Title | The distribution and dynamics of aufeis in permafrost regions |
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| Author | Ensom, T; Makarieva, O; Morse, P D ; Kane, D; Alekseev, V; Marsh, P |
| Source | Transactions of the International Permafrost Association Number 3; by Burn, C R (ed.); Permafrost and Periglacial Processes vol. 31, issue 3, 2020 p. 383-395, https://doi.org/10.1002/ppp.2051 |
| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20200077 |
| Publisher | John Wiley and Sons Ltd |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | Northwest Territories; Yukon; Nunavut; Quebec; Ontario |
| NTS | 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78;
79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Area | Mackenzie Mountains; Firth River; Babbage River; Rat River; Mackenzie Delta; Great Slave Lake; Axel Heiberg Island; James Bay; St. Lawrence River; Churchill River; Baffin Island; Alaska; Canada; Russian
Federation; United States of America; Svalbard and Jan Mayen; Norway; Greenland; Denmark |
| Lat/Long WENS | -180.0000 180.0000 90.0000 40.0000 |
| Subjects | surficial geology/geomorphology; hydrogeology; geophysics; environmental geology; Nature and Environment; Science and Technology; permafrost; ground ice; groundwater flow; groundwater regimes; aufeis;
climate; hydrologic environment; watersheds; temperature; surface waters; ground temperatures; Canadian Shield; Climate change |
| Illustrations | photographs; location maps; schematic representations; tables |
| Program | Climate Change
Geoscience Permafrost |
| Released | 2020 05 23 |
| Abstract | Aufeis, also known as an icing or naled, is an accumulation of ice that forms primarily during winter when water is expelled onto frozen ground or ice surfaces and freezes in layers. Process-oriented
aufeis research initially expanded in the 20th century, but recent interest in changing hydrological conditions in permafrost regions has rejuvenated this field. Despite its societal relevance, the controls on aufeis distribution and dynamics are not
well defined and this impedes projections of variation in aufeis size and distribution expected to accompany climate change. This paper reviews the physical controls on aufeis development, current broad-scale aufeis distribution and anticipated
change, and approaches to aufeis investigation. We propose an adjustment to terminology to better distinguish between the formation process and resulting ice bodies, a clarification of the aufeis classification approach based on source water, and a
size threshold for broad-scale aufeis inventory to facilitate collaborative research. We identify additional objectives for future research including advancing process knowledge at fine spatial scales, describing broad-scale distribution using
current remote sensing capabilities, and improving our understanding and predictive capacity over the interactions between aufeis and landscape-scale permafrost, hydrogeological, geotectonic, and climate conditions. |
| Summary | (Plain Language Summary, not published)
Aufeis is an accumulation of ice that forms primarily in permafrost regions when water freezes in successive layers on the ground or existing ice. Aufeis
formation affects the hydrological cycle, and it is a geohazard that is expensive to mitigate and difficult to predict. Despite its societal relevance, the controls on aufeis distribution and dynamics are not well defined. This impedes projections of
aufeis variation that will accompany climate change and development of effective mitigation and management techniques. This study reviews studies published primarily since 1960 to identify research needs and opportunities. Key objectives identified
for future research include investigating aufeis dynamics at fine spatial scales, describing broad-scale distribution using current mapping techniques, and improving our understanding and predictive capacity over the interactions between aufeis,
landscape-scale terrain conditions, and climate. |
| GEOSCAN ID | 326150 |
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