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Title: An intermediate-scale model for thermal hydrology in low-relief permafrost-affected landscapes

Abstract

Integrated surface/subsurface models for simulating the thermal hydrology of permafrost-affected regions in a warming climate have recently become available, but computational demands of those new process-rich simu- lation tools have thus far limited their applications to one-dimensional or small two-dimensional simulations. We present a mixed-dimensional model structure for efficiently simulating surface/subsurface thermal hydrology in low-relief permafrost regions at watershed scales. The approach replaces a full three-dimensional system with a two-dimensional overland thermal hydrology system and a family of one-dimensional vertical columns, where each column represents a fully coupled surface/subsurface thermal hydrology system without lateral flow. The system is then operator split, sequentially updating the overland flow system without sources and the one-dimensional columns without lateral flows. We show that the app- roach is highly scalable, supports subcycling of different processes, and compares well with the corresponding fully three-dimensional representation at significantly less computational cost. Those advances enable recently developed representations of freezing soil physics to be coupled with thermal overland flow and surface energy balance at scales of 100s of meters. Furthermore developed and demonstrated for permafrost thermal hydrology, the mixed-dimensional model structure is applicable to integrated surface/subsurface thermal hydrology in general.

Authors:
ORCiD logo [1];  [2];  [1];  [3];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376362
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Computational Geosciences
Additional Journal Information:
Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 1420-0597
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; Multiscale models; Permafrost thermal hydrology; Integrated surface/subsurface flow modeling; Arctic

Citation Formats

Jan, Ahmad, Coon, Ethan T., Painter, Scott L., Garimella, Rao, and Moulton, J. David. An intermediate-scale model for thermal hydrology in low-relief permafrost-affected landscapes. United States: N. p., 2017. Web. doi:10.1007/s10596-017-9679-3.
Jan, Ahmad, Coon, Ethan T., Painter, Scott L., Garimella, Rao, & Moulton, J. David. An intermediate-scale model for thermal hydrology in low-relief permafrost-affected landscapes. United States. doi:10.1007/s10596-017-9679-3.
Jan, Ahmad, Coon, Ethan T., Painter, Scott L., Garimella, Rao, and Moulton, J. David. Mon . "An intermediate-scale model for thermal hydrology in low-relief permafrost-affected landscapes". United States. doi:10.1007/s10596-017-9679-3. https://www.osti.gov/servlets/purl/1376362.
@article{osti_1376362,
title = {An intermediate-scale model for thermal hydrology in low-relief permafrost-affected landscapes},
author = {Jan, Ahmad and Coon, Ethan T. and Painter, Scott L. and Garimella, Rao and Moulton, J. David},
abstractNote = {Integrated surface/subsurface models for simulating the thermal hydrology of permafrost-affected regions in a warming climate have recently become available, but computational demands of those new process-rich simu- lation tools have thus far limited their applications to one-dimensional or small two-dimensional simulations. We present a mixed-dimensional model structure for efficiently simulating surface/subsurface thermal hydrology in low-relief permafrost regions at watershed scales. The approach replaces a full three-dimensional system with a two-dimensional overland thermal hydrology system and a family of one-dimensional vertical columns, where each column represents a fully coupled surface/subsurface thermal hydrology system without lateral flow. The system is then operator split, sequentially updating the overland flow system without sources and the one-dimensional columns without lateral flows. We show that the app- roach is highly scalable, supports subcycling of different processes, and compares well with the corresponding fully three-dimensional representation at significantly less computational cost. Those advances enable recently developed representations of freezing soil physics to be coupled with thermal overland flow and surface energy balance at scales of 100s of meters. Furthermore developed and demonstrated for permafrost thermal hydrology, the mixed-dimensional model structure is applicable to integrated surface/subsurface thermal hydrology in general.},
doi = {10.1007/s10596-017-9679-3},
journal = {Computational Geosciences},
number = 1,
volume = 22,
place = {United States},
year = {Mon Jul 10 00:00:00 EDT 2017},
month = {Mon Jul 10 00:00:00 EDT 2017}
}

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