Permafrost mapping of Northeast European Russia based on the period of climatic warming 1970-1995

The geographic information system (GIS) `Permafrost of the Usa River Basin was developed based on data for permafrost distribution and temperatures obtained for the period of recent warming (1970-1995). A total of 70 long-term permafrost monitoring sites and meteorological records (ground temperatur...

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Bibliographic Details
Published in:Norsk geografisk tidsskrift 2003, Vol.57 (2), p.111-120
Main Authors: OBERMAN, NAUM G., MAZHITOVA, GALJNA G.
Format: Article
Language:English
Subjects:
Bgi / Prodig
climatic warming
Cold areas
Geomorphology
GIS
ground temperature monitoring
permafrost mapping
Physical geography
Russia
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Summary:The geographic information system (GIS) `Permafrost of the Usa River Basin was developed based on data for permafrost distribution and temperatures obtained for the period of recent warming (1970-1995). A total of 70 long-term permafrost monitoring sites and meteorological records (ground temperatures), representing all major landforms and parent materials in the Usa Basin, were used to calibrate the temperature data from 500 boreholes and to select 131 of these as reference boreholes. Data for permafrost characteristics were only derived for those years during which measured ground temperature (expressed in not equal to ) deviated no more than 10% from long-term means. Therefore, they represent average conditions for the period 1970-1995. This approach also indicates that the dataset is particularly accurate around the transition from thawed to perennially frozen ground. The standardization also allowed the examination of anomalies in permafrost conditions due to landform, exposure, parent material, vegetation cover, etc. To up-scale the specific ground temperature data, a scheme was developed subdividing the region into relatively homogeneous geomorphological-geological units with respect to geocryological conditions.
ISSN:0029-1951
1502-5292
DOI:10.1080/00291950310001513