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A coupled heat and moisture transport model for Arctic soils
Author(s) -
Guymon Gary L.,
Luthin James N.
Publication year - 1974
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr010i005p00995
Subject(s) - permafrost , moisture , soil water , richards equation , arctic , convection , subarctic climate , thermal conduction , convergence (economics) , environmental science , soil science , geology , mechanics , thermodynamics , meteorology , physics , oceanography , economic growth , economics
The thermal and moisture regimes of arctic and subarctic soils act in parallel in a complex manner and must be considered together. The problem of moisture movement and storage in these soils is complicated by water undergoing a phase change during freezing and thawing and by the presence of ice‐rich permafrost. A one‐dimensional model of these processes is developed and is based on an equivalent quasilinear variational functional for the Richards equation and the heat conduction equation including convective components. The variational functional is solved by a finite element analog. Convergence and stability are investigated, and it is concluded that the numerical procedure is convergent and stable in general.