期刊
PERMAFROST AND PERIGLACIAL PROCESSES
卷 20, 期 1, 页码 41-56出版社
WILEY
DOI: 10.1002/ppp.640
关键词
permafrost; climate change; seasonal meteorological variables; active layer depth; ground temperatures
资金
- Presidium of Russian Academy of Sciences
- Russian Foundation for Basic Research [06-05-64349, 08-05-00475]
- NSF
Statistical correlations between seasonal air temperatures and snow depths and active layer depths and permafrost temperatures were analysed for tundra (Marre-Salle) and northern taiga (Nadym) sites in Western Siberia. Interannual variations in active layer depth in the tundra zone correlated with the average air temperature of the current summer, and in peatland and humid tundra, also with summer temperatures of the preceding 1-2 years. In the northern taiga zone, the active layer depth related to current summer air temperature and to a lesser extent, to spring and/or winter air temperatures. Variations in summer permafrost temperatures at 5-10 m depth were correlated with spring air temperatures in the current and preceding 1-2 years. The weather regime during the preceding 12 years, therefore, reinforced or weakened ground temperature variations in a given year. Overall, the most important factors influencing the permafrost regime were spring and summer air temperatures, and in one case snow depth. However, statistical links between meteorological and permafrost parameters varied between the tundra and northern taiga zones and among landscape types within each zone, emphasising the importance of analyses at short temporal scales and for individual terrain units. Copyright (C) 2009 John Wiley & Sons, Ltd.
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