气候变化领域集成服务门户(CCPortal): Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0)

CCPortal

DOI	10.5194/tc-8-1935-2014
	Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0)
	Karra S.; Painter S.L.; Lichtner P.C.
发表日期	2014
ISSN	19940416
卷号	8 期号:5
英文摘要	Degradation of near-surface permafrost due to changes in the climate is expected to impact the hydrological, ecological and biogeochemical responses of the Arctic tundra. From a hydrological perspective, it is important to understand the movement of the various phases of water (gas, liquid and ice) during the freezing and thawing of near-surface soils. We present a new non-isothermal, single-component (water), three-phase formulation that treats air as an inactive component. This single component model works well and produces similar results to a more complete and computationally demanding two-component (air, water) formulation, and is able to reproduce results of previously published laboratory experiments. A proof-of-concept implementation in the massively parallel subsurface flow and reactive transport code PFLOTRAN is summarized, and parallel performance of that implementation is demonstrated. When water vapor diffusion is considered, a large effect on soil moisture dynamics is seen, which is due to dependence of thermal conductivity on ice content. A large three-dimensional simulation (with around 6 million degrees of freedom) of seasonal freezing and thawing is also presented.
学科领域	freeze-thaw cycle; moisture flux; numerical model; permafrost; reactive transport; subsurface flow; tundra; Arctic
语种	英语
scopus关键词	freeze-thaw cycle; moisture flux; numerical model; permafrost; reactive transport; subsurface flow; tundra; Arctic
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120040
作者单位	Computational Earth Science Group, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; OFM Research, 28430 NE 47th Pl, Redmond, WA 98053, United States; Climate Change Science Institute, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
推荐引用方式 GB/T 7714	Karra S.,Painter S.L.,Lichtner P.C.. Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0)[J],2014,8(5).
APA	Karra S.,Painter S.L.,&Lichtner P.C..(2014).Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0).Cryosphere,8(5).
MLA	Karra S.,et al."Three-phase numerical model for subsurface hydrology in permafrost-affected regions (PFLOTRAN-ICE v1.0)".Cryosphere 8.5(2014).