Soil temperature across an experimental burn severity gradient in far northeastern Siberia

• Main Authors: Heather D. Alexander, Michelle C. Mack
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2013
• Subjects: EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > FORESTS; EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > FIRE ECOLOGY > FIRE DYNAMICS; EARTH SCIENCE > LAND SURFACE > SOILS > SOIL TEMPERATURE; EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES; MANNED FIELD STATION; POINT; 1 METER TO 30 METERS; HOURLY TO DAILY; Buttons; permafrost; Siberia
• Online Access: https://search.dataone.org/view/urn:uuid:f3e9ed0d-762d-43e9-b7fd-cdb07e753520

Global change models predict an increase in fire activity in boreal forests as climate continues to warm and dry. Because fire consumes the soil organic layer (SOL), the layer of undecomposed mosses and roots atop the permafrost, we hypothesized that increased fire severity will increase permafrost thaw by reducing the depth, and therefore insulating capacity, of the SOL. To test this hypothesis, we conducted plot-level (2-m2) experimental burns in July 2012 in a low-density, mature larch stand located near the Northeast Science Station in Cherskii, Siberia. Dried fuels comprised of naturally occurring vegetation were added to plots to achieve four burn treatments based on residual SOL depths: control, low severity (> 8 cm), moderate severity (5-8 cm), and high severity (2-5 cm).Soil temperature was measured from July to September 2012 in the center of each experimental burn plot using i-buttons placed 10-cm below soil surface.