Monitoring over‐winter soil water dynamics in a freezing and snow‐covered environment using a thermally insulated tensiometer

Y Iwata, T Hirota - Hydrological Processes: An International …, 2005 - Wiley Online Library
Y Iwata, T Hirota
Hydrological Processes: An International Journal, 2005Wiley Online Library
Water potential below a frozen soil layer was continuously monitored over an entire winter
period (using thermally insulated tensiometers sheltered in a heated chamber) along with
other soil, snow and atmospheric variables. In early winter, the freezing front advanced
under a thin snow cover, inducing upward soil water flow in the underlying unfrozen soil.
The freezing front started to retreat when the snow cover became thick enough to insulate
the soil, resulting in the reversal of the flow direction in the unfrozen zone. These data …
Abstract
Water potential below a frozen soil layer was continuously monitored over an entire winter period (using thermally insulated tensiometers sheltered in a heated chamber) along with other soil, snow and atmospheric variables. In early winter, the freezing front advanced under a thin snow cover, inducing upward soil water flow in the underlying unfrozen soil. The freezing front started to retreat when the snow cover became thick enough to insulate the soil, resulting in the reversal of the flow direction in the unfrozen zone. These data provide a clear illustration of soil water dynamics, which have rarely been monitored with a tensiometer. Copyright © 2005 John Wiley & Sons, Ltd.
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