FOREST-BGC (FOREST BioGeoChemical process model)

FOREST-BGC treats canopy interception and evaporation, transpiration, photosynthesis, growth and maintenance respiration, carbon allocation above and below-ground, litterfall, decomposition and nitrogen mineralization.

canopyinterceptionevaporationtranspirationphotosynthesisgrowth

Contributor(s)

Initial contribute: 2020-01-03

Authorship

FOREST-BGC team

Is authorship not correct? Feed back

Classification(s)

●

Application-focused categories

Natural-perspective

Land regions

●

Application-focused categories

Natural-perspective

Atmospheric regions

Detailed Description

English

Quoted from: https://www.bgc-jena.mpg.de/TEE/software/bgc-md/vegetation/Running1988EcologicalModelling-V0001/Report.html

The model depicted in this document considers carbon allocation with a process based approach. It was originally described by S. W. Running & Coughlan (1988).

Abstract

An ecosystem process model is described that calculates the carbon, water and nitrogen cycles through a forest ecosystem. The model, FOREST-BGC, treats canopy interception and evaporation, transpiration, photosynthesis, growth and maintenance respiration, carbon allocation above and below-ground, litterfall, decomposition and nitrogen mineralization. The model uses leaf area index (LAI) to quantify the forest structure important for energy and mass exchange, and this represents a key simplification for regional scale applications. FOREST-BGC requires daily incoming short-wave radiation, air temperature, dew point, and precipitation as driving variables. The model was used to simulate the annual hydrologic balance and net primary production of a hypothetical forest stand in seven contrasting environments across North America for the year 1984. Hydrologic partitioning ranged from 14/86/0% for evaporation, transpiration and outflow, respectively, in Fairbanks, AK (annual precipitation of 313 mm) to 10/27/66% in Jacksonville, FL (annual ppt of 1244 mm), and these balances changed as LAI was increased from 3 to 9 in successive simulations. Net primary production (npp) ranged from 0.0 t C ha-1 year-1 at Tucson, AZ, to 14.1 t C ha-1 year-1 at Knoxville, TN and corresponded reasonably with observed values at each site. The sensitivity of ecosystem processes to varying LAI in different climates was substantial, and underscores the utility of parameterizing this model at regional scales in the future with forest LAI measurements derived from satellite imagery. ?? 1988.

Space Scale

site

Available parameter values

Information on given parameter sets
Abbreviation	Source
Original dataset of the publication	S. W. Running & Coughlan (1988)
Additional set 1	Hunt Jr, Martin, & Running (1991)
Additional set 2	Korol, Running, Milner, & Hunt (1991)

State Variables

The following table contains the available information regarding this section:

Information on State Variables
Name	Description
$C_{f}$	Carbon in foliage
$C_{r}$	Carbon in roots
$C_{w}$	Carbon in woody tissue

Allocation Coefficients

The following table contains the available information regarding this section:

Information on Allocation Coefficients
Name	Type	Values Original dataset of the publication	Additional set 1	Additional set 2
$η_{f}$	parameter	$\frac{1}{4}$	$\frac{1}{5}$	$\frac{12}{25}$
$η_{r}$	parameter	$\frac{2}{5}$	$\frac{11}{20}$	$\frac{37}{100}$
$η_{w}$	parameter	$\frac{7}{20}$	$\frac{1}{4}$	$\frac{3}{20}$

Cycling Rates

The following table contains the available information regarding this section:

Information on Cycling Rates
Name	Entry Author Orcid	Type	Values Original dataset of the publication	Additional set 1	Additional set 2
$γ_{f}$	0000-0002-0046-1160	parameter	$\frac{33}{100}$	-	-
$γ_{r}$	0000-0002-0046-1160	parameter	$\frac{2}{5}$	$\frac{3}{4}$	$\frac{3}{4}$
$γ_{w}$	0000-0002-0046-1160	parameter	$0$	-	-

Components

The following table contains the available information regarding this section:

Information on Components
Name	Description	Expressions
$x$	vector of states for vegetation	$x = [\begin{matrix} C_{f} \\ C_{r} \\ C_{w} \end{matrix}]$
$u$	scalar function of photosynthetic inputs	-
$b$	vector of partitioning coefficients of photosynthetically fixed carbon	$b = [\begin{matrix} η_{f} \\ η_{r} \\ η_{w} \end{matrix}]$
$A$	matrix of turnover (cycling) rates	$A = [\begin{matrix} - γ_{f} & 0 & 0 \\ 0 & - γ_{r} & 0 \\ 0 & 0 & - γ_{w} \end{matrix}]$
$f_{v}$	the righthandside of the ode	$f_{v} = u b + A x$

Pool model representation

	Flux description
Figure 1: Pool model representation	Input fluxes $C_{f} : η_{f} \cdot u$ $C_{r} : η_{r} \cdot u$ $C_{w} : η_{w} \cdot u$ Output fluxes $C_{f} : C_{f} \cdot γ_{f}$ $C_{r} : C_{r} \cdot γ_{r}$ $C_{w} : C_{w} \cdot γ_{w}$

Flux description

Figure 1: Pool model representation

Input fluxes

$C_{f} : η_{f} \cdot u$
$C_{r} : η_{r} \cdot u$
$C_{w} : η_{w} \cdot u$

Output fluxes

C_{f} : C_{f} \cdot γ_{f}

C_{r} : C_{r} \cdot γ_{r}

C_{w} : C_{w} \cdot γ_{w}

The right hand side of the ODE

$[\begin{matrix} - C_{f} \cdot γ_{f} + η_{f} \cdot u \\ - C_{r} \cdot γ_{r} + η_{r} \cdot u \\ - C_{w} \cdot γ_{w} + η_{w} \cdot u \end{matrix}]$

The Jacobian (derivative of the ODE w.r.t. state variables)

$[\begin{matrix} - γ_{f} & 0 & 0 \\ 0 & - γ_{r} & 0 \\ 0 & 0 & - γ_{w} \end{matrix}]$

Steady state formulas

$C_{f} = \frac{η_{f}}{γ_{f}} \cdot u$
$C_{r} = \frac{η_{r}}{γ_{r}} \cdot u$
$C_{w} = \frac{η_{w}}{γ_{w}} \cdot u$

Steady states (potentially incomplete), according jacobian eigenvalues, damping ratio

Parameter set: Original dataset of the publication

$C_{f} : \frac{25}{33} \cdot u$ , $C_{r} : u$ , $C_{w} : C_{w}$

$λ_{1} : 0.000$
$λ_{2} : - 0.400$
$λ_{3} : - 0.330$

Parameter set: Additional set 1

$C_{f} : \frac{u}{5 \cdot γ_{f}}$ , $C_{r} : \frac{11}{15} \cdot u$ , $C_{w} : \frac{u}{4 \cdot γ_{w}}$

$λ_{1} : - γ_{w}$
$λ_{2} : - 0.75$
$λ_{3} : - γ_{f}$

Parameter set: Additional set 2

$C_{f} : \frac{12 \cdot u}{25 \cdot γ_{f}}$ , $C_{r} : \frac{37}{75} \cdot u$ , $C_{w} : \frac{3 \cdot u}{20 \cdot γ_{w}}$

$λ_{1} : - γ_{w}$
$λ_{2} : - 0.75$
$λ_{3} : - γ_{f}$

References

Hunt Jr, E. R., Martin, F. C., & Running, S. W. (1991). Simulating the effects of climatic variation on stem carbon accumulation of a ponderosa pine stand: Comparison with annual growth increment data. Tree Physiology, 9(1_2), 161–171. http://doi.org/10.1093/treephys/9.1-2.161

Korol, R. L., Running, S. W., Milner, K. S., & Hunt, E. R. (1991). TESTING a mECHANISTIC cARBON bALANCE mODEL aGAINST oBSERVED tREE gROWTH. Canadian Journal of Forest Research-Revue Canadienne De Recherche Forestiere, 21(7), 1098–1105. http://doi.org/10.1139/x91-151

Running, S. W., & Coughlan, J. C. (1988). A general model of forest ecosystem processes for regional applications i. hydrologic balance, canopy gas exchange and primary production processes. Ecological Modelling, 42(2), 125–154. http://doi.org/10.1016/0304-3800(88)90112-3

{{htmlJSON.ComputableModelList}} 0

{{htmlJSON.ConceptualschematicModelList}} 0

{{htmlJSON.LogicalschematicModelList}} 0

{{htmlJSON.ModelItem}} 5

Author {{curRelation.author.join('; ')}}

Journal {{curRelation.journal}}

{{htmlJSON.DataItem}} 0

Data Hub 0

There is no related data hub. You can link data hubs.

Data Method 0

There is no related data method. You can link data methods.

{{htmlJSON.Reference}} 0

{{htmlJSON.Material}} 0

模型元数据

FOREST-BGC team (2020). FOREST-BGC (FOREST BioGeoChemical process model), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/e0ce4b0e-06ef-4dd8-b0dc-71e7f67ed9eb

Copyright and Disclaimer

All copyrights of a material (model, data, article, etc.) in the OpenGMS fully belong to its author/developer/designer (or any other wording about the owner). The OpenGMS takes every care to avoid copyright infringement, contributor(s) should carefully employ materials from other sources and give proper citations.

Contributor(s)

Initial contribute : 2020-01-03

Authorship

FOREST-BGC team

Is authorship not correct? Feed back

QR Code

Author {{curRelation.author.join('; ')}}

Journal {{curRelation.journal}}

{{htmlJSON.LinkResourceFromRepositoryOrCreate}}{{htmlJSON.create}}.

Drop the file here, orclick to upload.

Select From My Space

+ add

Alias

+ {{htmlJSON.Add}}

{{htmlJSON.ModelName}}:

* 名称

别名

系列名

* 版本号

* 目的

* 修改内容

* 创建/修改日期

* 作者

* 摘要

详细描述

+ 添加关键字

* 时间参考系

* 空间参考系类型

* 空间参考系名称

* 起始日期

终止日期

* 进展

* 开发者

* 是否开源

* 访问方式

* 使用方式

* 开源协议

* 传输方式

* 获取地址

* 发布日期

* 发布者

* 编号

* 目的

* 修改内容

* 创建/修改日期

* 作者

* 时间分辨率

* 时间尺度

* 时间步长

* 时间范围

* 空间维度

* 格网类型

* 空间分辨率

* 空间尺度

* 空间范围

* 类型

图例

* 名称

* 描述

示例描述

* 名称

* 类型

* 值/链接

或

上传

Title	Author	Date	Journal	Volume(Issue)	Pages	Links	Doi	Operation

{{htmlJSON.GetByDoi}} :

Authors: {{articleUploading.authors[0]}}, {{articleUploading.authors[1]}}, {{articleUploading.authors[2]}}, et al.

Journal: {{articleUploading.journal}}

Date: {{articleUploading.date}}

Page range: {{articleUploading.pageRange}}

Link: {{articleUploading.link}}

DOI: {{articleUploading.doi}}

The article {{articleUploading.title}} has been uploaded yet.

FOREST-BGC (FOREST BioGeoChemical process model)

Contributor(s)

Initial contribute: 2020-01-03

Authorship

Classification(s)

Detailed Description

Abstract

Space Scale

Available parameter values

State Variables

Allocation Coefficients

Cycling Rates

Components

Pool model representation

Input fluxes

Output fluxes

The right hand side of the ODE

The Jacobian (derivative of the ODE w.r.t. state variables)

Steady state formulas

Steady states (potentially incomplete), according jacobian eigenvalues, damping ratio

Parameter set: Original dataset of the publication

Parameter set: Additional set 1

Parameter set: Additional set 2

References

{{htmlJSON.ModelContentService}}

{{htmlJSON.noComputableModel}}

{{htmlJSON.NoRelatedConceptual}}

{{htmlJSON.NoRelatedLogical}}

{{htmlJSON.RelatedModelsData}}

{{htmlJSON.NoRelatedModel}}

{{htmlJSON.noRelatedData}}

There is no related data hub. You can link data hubs.

There is no related data method. You can link data methods.

{{htmlJSON.RelatedKnowledge}}

{{htmlJSON.noRelatedReference}}

{{htmlJSON.NoRelatedMmaterial}}

模型元数据

{{htmlJSON.HowtoCite}}

Copyright and Disclaimer

Contributor(s)

Initial contribute : 2020-01-03

{{htmlJSON.CoContributor}}

Authorship

QR Code

{{articleUploading.title}}

OpenGMS Systems

Online Tools

About

Contact

OpenGMS Systems

Online Tools

About

Contact

Open Geographic Modeling and Simulation

Authorship

NEW

{{articleUploading.title}}

No content to show

You have select {{multipleSelection.length+multipleSelectionMyData.length}} data .

NEW

Comment(s)