DOI: 10.1002/2017MS001148
Scopus记录号: 2-s2.0-85044774044
论文题名: A New Scheme for Considering Soil Water-Heat Transport Coupling Based on Community Land Model: Model Description and Preliminary Validation
作者: Wang C ; , Yang K
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2018
语种: 英语
英文关键词: Flow of water
; Soil moisture
; Surface measurement
; Vegetation
; Water vapor
; Diabatic heating
; Freeze-thaw
; Heat transport
; Land surface modeling
; Soil water
; Heat transfer
英文摘要: Land surface models (LSMs) have developed significantly over the past few decades, with the result that most LSMs can generally reproduce the characteristics of the land surface. However, LSMs fail to reproduce some details of soil water and heat transport during seasonal transition periods because they neglect the effects of interactions between water movement and heat transfer in the soil. Such effects are critical for a complete understanding of water-heat transport within a soil thermohydraulic regime. In this study, a fully coupled water-heat transport scheme (FCS) is incorporated into the Community Land Model (version 4.5) to replaces its original isothermal scheme, which is more complete in theory. Observational data from five sites are used to validate the performance of the FCS. The simulation results at both single-point and global scale show that the FCS improved the simulation of soil moisture and temperature. FCS better reproduced the characteristics of drier and colder surface layers in arid regions by considering the diffusion of soil water vapor, which is a nonnegligible process in soil, especially for soil surface layers, while its effects in cold regions are generally inverse. It also accounted for the sensible heat fluxes caused by liquid water flow, which can contribute to heat transfer in both surface and deep layers. The FCS affects the estimation of surface sensible heat (SH) and latent heat (LH) and provides the details of soil heat and water transportation, which benefits to understand the inner physical process of soil water-heat migration. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75673
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Key Laboratory of Arid Climate Change and Disaster Reduction of Gansu Province, College of Atmospheric SciencesLanzhou UniversityLanzhou, Gansu China
Recommended Citation:
Wang C,, Yang K. A New Scheme for Considering Soil Water-Heat Transport Coupling Based on Community Land Model: Model Description and Preliminary Validation[J]. Journal of Advances in Modeling Earth Systems,2018-01-01