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Time Series of Active Layer Thickness in the Russian Arctic, 1930-1990


This data set consists of active layer thickness (ALT) measurements based on soil temperatures in the Russian Arctic. The active layer is the top layer of ground that freezes in the winter and thaws in the summer over permafrost. Changes in ALT over northern high-latitude permafrost regions have important impacts on the surface energy balance, hydrologic cycle, carbon exchange between the atmosphere and the land surface, plant growth, and ecosystem as a whole. Warming may thicken the active layer and induce permafrost thaw. Investigators collected data from 31 ground-based stations. Derived from monthly averages, the record includes annual maximum active layer depths from 1930 to 1990. Data are in tab-delimited ASCII text format.

Data access

ORDER data for delivery by FTP

Additional information

Related projects: ARCSS
Observational frequency: monthly
Spatial type: point
Categories: Arctic, Land Character.
Platforms: Vegetation Sampling

Temporal coverage

Begin datetime: 1930-01-01 00:00:00, End datetime: 1990-12-31 23:59:59

Spatial coverage

Minimum latitude: 60.900000, Minimum longitude: 88.300000
Maximum latitude: 70.750000, Maximum longitude: 178.900000


Point of contact

Tingjun Zhang
National Snow and Ice Data Center.
E-Mail address: tzhang at kryos dot colorado dot edu