| Title | High Arctic permafrost observatory at Alert, Nunavut - analysis of a 23 year data set |
| |
| Author | Smith, S L ;
Burgess, M M; Taylor, A E |
| Source | Permafrost : proceedings of the 8th International Conference on Permafrost; by Phillips, M (ed.); Springman, S M (ed.); Arenson, L U (ed.); 2003 p. 1073-1078 |
| Image |  |
| Year | 2003 |
| Alt Series | Geological Survey of Canada, Contribution Series 2002053 |
| Publisher | A.A. Balkema (Lisse, The Netherlands) |
| Meeting | 8th International Conference on Permafrost; Zurich; CH; July 21-25, 2003 |
| Document | book |
| Lang. | English |
| Media | paper |
| Province | Nunavut |
| NTS | 120E/05; 120E/06; 120E/11; 120E/12 |
| Lat/Long WENS | -62.6833 -62.0000 82.5000 82.3333 |
| Subjects | environmental geology; regional geology; Nature and Environment; arctic geology; climate, arctic; permafrost; ground temperatures; boreholes; groundwater temperatures; snow; vegetation; thermal
analyses; logging techniques |
| Illustrations | location maps; graphs; bar graphs |
| Program | Climate Change Action Fund (CCAF) |
| Program | Government of Canada Action Plan
2000 on Climate Change |
| Released | 2003 01 01 |
| Abstract | Ground temperatures up to depths of 60 m have been measured on a regular basis since 1978 in five boreholes at Canadian Forces Station Alert, Nunavut. A general increase in air temperature of 0.12°C per
year since 1986 has been accompanied by an observed rise in permafrost temperature in the upper 30 m with the trend interrupted by a brief period of cooling in the early 1990s. Since the mid 1990s, permafrost temperatures in the upper 30 m have
increased by 0.15°C per year. Cooling of air temperature from the 1950s to the early 1980s appears to have resulted in lower permafrost temperature at depths below 40 m. Snow cover is thin but exhibits high spatial and temporal variability which is
reflected in the response of the shallow permafrost temperatures to changes in air temperature. |
| GEOSCAN ID | 213505 |
|
|