NDLI: The numerical scheme development of a simplified frozen soil model

Content Provider	Springer Nature Link
Author	Li, Qian Sun, Shufen Dai, Qiudan
Copyright Year	2009
Abstract	In almost all frozen soil models used currently, three variables of temperature, ice content and moisture content are used as prognostic variables and the rate term, accounting for the contribution of the phase change between water and ice, is shown explicitly in both the energy and mass balance equations. The models must be solved by a numerical method with an iterative process, and the rate term of the phase change needs to be pre-estimated at the beginning in each iteration step. Since the rate term of the phase change in the energy equation is closely related to the release or absorption of the great amount of fusion heat, a small error in the rate term estimation will introduce greater error in the energy balance, which will amplify the error in the temperature calculation and in turn, cause problems for the numerical solution convergence. In this work, in order to first reduce the trouble, the methodology of the variable transformation is applied to a simplified frozen soil model used currently, which leads to new frozen soil scheme used in this work. In the new scheme, the enthalpy and the total water equivalent are used as predictive variables in the governing equations to replace temperature, volumetric soil moisture and ice content used in many current models. By doing so, the rate terms of the phase change are not shown explicitly in both the mass and energy equations and its pre-estimation is avoided. Secondly, in order to solve this new scheme more functionally, the development of the numerical scheme to the new scheme is described and a numerical algorithm appropriate to the numerical scheme is developed. In order to evaluate the new scheme of the frozen soil model and its relevant algorithm, a series of model evaluations are conducted by comparing numerical results from the new model scheme with three observational data sets. The comparisons show that the results from the model are in good agreement with these data sets in both the change trend of variables and their magnitude values, and the new scheme, together with the algorithm, is more efficient and saves more computer time.
Starting Page	940
Ending Page	950
Page Count	11
File Format	PDF
ISSN	02561530
Journal	Advances in Atmospheric Sciences
Volume Number	26
Issue Number	5
e-ISSN	18619533
Language	English
Publisher	SP Science Press
Publisher Date	2009-09-19
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	simplified frozen soil model variable transformation enthalpy and total water equivalent numerical algorithm model validation Geophysics/Geodesy Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Development and validation of a simple frozen soil parameterization scheme used for climate model

Development of a model for water and heat exchange between the atmosphere and a water body

The numerical scheme development of a simplified frozen soil model (2008).

Validation of A One-Dimensional Snow-Land Surface Model at the Sleepers River Watershed

The water-bearing numerical model and its operational forecasting experiments part I: the water-bearing numerical model

Implementing a new snow scheme in Simplified Simple Biosphere Model

Total energy conservation and the symplectic algorithm

The impact of soil freezing/thawing processes on water and energy balances

A numerical study of the effect of frozen soil on dust emission during an East Asian dust event in December 2009

The numerical scheme development of a simplified frozen soil model

Similar Documents

Development and validation of a simple frozen soil parameterization scheme used for climate model

Development of a model for water and heat exchange between the atmosphere and a water body

The numerical scheme development of a simplified frozen soil model (2008).

Validation of A One-Dimensional Snow-Land Surface Model at the Sleepers River Watershed

The water-bearing numerical model and its operational forecasting experiments part I: the water-bearing numerical model

Implementing a new snow scheme in Simplified Simple Biosphere Model

Total energy conservation and the symplectic algorithm

The impact of soil freezing/thawing processes on water and energy balances

A numerical study of the effect of frozen soil on dust emission during an East Asian dust event in December 2009

The numerical scheme development of a simplified frozen soil model