Heat transport in the Red Lake Bog, Glacial Lake Agassiz Peatlands

Hydrological Processes
By: , and 



We report the results of an investigation on the processes controlling heat transport in peat under a large bog in the Glacial Lake Agassiz Peatlands. For 2 years, starting in July 1998, we recorded temperature at 12 depth intervals from 0 to 400 cm within a vertical peat profile at the crest of the bog at sub‐daily intervals. We also recorded air temperature 1 m above the peat surface. We calculate a peat thermal conductivity of 0·5 W m−1 °C−1 and model vertical heat transport through the peat using the SUTRA model. The model was calibrated to the first year of data, and then evaluated against the second year of collected heat data. The model results suggest that advective pore‐water flow is not necessary to transport heat within the peat profile and most of the heat is transferred by thermal conduction alone in these waterlogged soils. In the spring season, a zero‐curtain effect controls the transport of heat through shallow depths of the peat. Changes in local climate and the resulting changes in thermal transport still may cause non‐linear feedbacks in methane emissions related to the generation of methane deeper within the peat profile as regional temperatures increase.

Study Area

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Heat transport in the Red Lake Bog, Glacial Lake Agassiz Peatlands
Series title Hydrological Processes
DOI 10.1002/hyp.6239
Volume 21
Issue 3
Year Published 2007
Language English
Publisher John Wiley & Sons, Ltd.
Contributing office(s) Toxic Substances Hydrology Program
Description 10 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Hydrological Processes
First page 369
Last page 378
Country United States
State Minnesota
Other Geospatial Glacial Lake Agassiz Peatlands
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table