Summary
| Also known as
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| Model type
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Modular
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| Model part of larger framework
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| Note on status model
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| Date note status model
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Technical specs
| Supported platforms
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Linux, Windows
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| Other platform
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| Programming language
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Python
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| Other program language
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| Code optimized
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Single Processor
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| Multiple processors implemented
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| Nr of distributed processors
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| Nr of shared processors
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| Start year development
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2002
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| Does model development still take place?
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Yes
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| If above answer is no, provide end year model development
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| Code development status
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| When did you indicate the 'code development status'?
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| Model availability
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As code, As teaching tool
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Source code availability
(Or provide future intension)
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Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property.
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| Source web address
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| Source csdms web address
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| Program license type
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Other
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| Program license type other
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--
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| Memory requirements
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minimal
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| Typical run time
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less than 1 minute after preprocessing
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In/Output
| Describe input parameters
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Source inputs consist of global, spatially distributed (GIS) raster datasets: hydrological properties (river basin systems, runoff, reservoirs, irrigation, rainfall), topographic slope, land use, agricultural N & P inputs (fertilizer, manure), atmospheric N deposition, sewage, N fixation, etc.
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| Input format
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ASCII, Binary
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| Other input format
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| Describe output parameters
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Primary outputs: N, P, Si, and C yields and loads by river basin and nutrient form. Secondary outputs: Source attribution by nutrient form and main natural and anthropogenic inputs to watersheds. Total Suspended Solids are also predicted.
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| Output format
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ASCII
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| Other output format
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| Pre-processing software needed?
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No
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| Describe pre-processing software
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| Post-processing software needed?
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No
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| Describe post-processing software
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| Visualization software needed?
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Yes
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| If above answer is yes
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ESRI, IDL, Matlab
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| Other visualization software
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Most GIS software
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Process
| Describe processes represented by the model
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Natural, agricultural, atmospheric, and direct human (sewage and P detergents) inputs; effect of hydrological functioning; generalized loss of nutrients in soils and groundwater; loss in rivers, reservoirs, and through consumptive water withdrawals (irrigation).
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| Describe key physical parameters and equations
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Net N & P land surface balance (from inputs, incl. atm. deposition) modulated with calibrated runoff relationships to estimate exports to streams; point sources calculated from socioecon. and sewage treatment information; reservoir and consumptive water withdrawal loss using physical relationships.
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| Describe length scale and resolution constraints
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Limited by resolutn of input & river systems data; basins < 20,000 km2 currently poorly represented
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| Describe time scale and resolution constraints
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Operates at annual scale; monthly-seasonal time steps are being explored.
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| Describe any numerical limitations and issues
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Concerns about extrapolations beyond range of data used for model calibration and parameterization.
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Testing
| Describe available calibration data sets
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Calibration data consist of compilations of river N, P, Si and C annual yields by form.
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| Upload calibration data sets if available:
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| Describe available test data sets
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Global (GEMS-GLORI), regional, national and literature compilations. A subset used for validation.
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| Upload test data sets if available:
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| Describe ideal data for testing
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Robust river nutrient fluxes near the mouth representative of annual, contemporary conditions.
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Other
| Do you have current or future plans for collaborating with other researchers?
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Model is the result of an international collaboration that is a UNESCO-IOC workgroup (Global NEWS).
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| Comments
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Particulates model is regression-based, while dissolved model is more conceptual-mechanistic. Conceptual framework and data sets in development since 2002. Integrated modeling code framework (GNE) developed in 2007; currently tested on Windows only, but can be easily adapted to other platforms.
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GNE
Introduction
History
Papers
GNE Questionnaire
Contact Information
| Model:
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Global NEWS / GNE
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| Contact person:
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Sybil Seitzinger
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| Institute:
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Rutgers - Institute of Marine & Coastal Sciences
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| City:
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New Brunswick, NJ
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| Country:
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USA
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| Email:
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sybil@marine.rutgers.edu
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| 2nd person involved:
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Emilio Mayorga (Developer)
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| 3rd person involved:
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John Harrison (Developer)
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Model description
| Model type:
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Single model for the terrestrial and coastal domain.
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| Description:
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A multi-element (N, P, Si, C), multi-form (particulate, dissolved, organic, inorganic) set of biogeochemical sub-models that predicts annual river exports to the coast as a function of basin-aggregated natural and human impact characteristics; GNE is a generic framework used to run the basin models.
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Technical information
| Supported platforms:
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Linux, Windows
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| Programming language:
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Python
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| Model was developed started from:
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2002 and development still takes place
|
| To what degree will the model become available:
|
As code, as teaching tool
|
| Current license type:
|
--
|
| Memory requirements:
|
minimal
|
| Typical run time:
|
less than 1 minute after preprocessing
|
Input / Output description
| Input parameters:
|
Source inputs consist of global, spatially distributed (GIS) raster datasets: hydrological properties (river basin systems, runoff, reservoirs, irrigation, rainfall), topographic slope, land use, agricultural N & P inputs (fertilizer, manure), atmospheric N deposition, sewage, N fixation, etc.
|
| Input format:
|
ASCII, Binary
|
| Output parameters:
|
Primary outputs: N, P, Si, and C yields and loads by river basin and nutrient form. Secondary outputs: Source attribution by nutrient form and main natural and anthropogenic inputs to watersheds. Total Suspended Solids are also predicted.
|
| Output format:
|
ASCII
|
| Post-processing software (if needed):
|
no
|
| Visualization software (if needed):
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yes, out_ESRI, IDL, Matlab, Most GIS software
|
Process description
| Processes represented by model:
|
Natural, agricultural, atmospheric, and direct human (sewage and P detergents) inputs; effect of hydrological functioning; generalized loss of nutrients in soils and groundwater; loss in rivers, reservoirs, and through consumptive water withdrawals (irrigation).
|
| Key physical parameters & equations:
|
Net N & P land surface balance (from inputs, incl. atm. deposition) modulated with calibrated runoff relationships to estimate exports to streams; point sources calculated from socioecon. and sewage treatment information; reservoir and consumptive water withdrawal loss using physical relationships.
|
| Length scale & resolution constraints:
|
Limited by resolutn of input & river systems data; basins < 20,000 km2 currently poorly represented
|
| Time scale & resolution constraints:
|
Operates at annual scale; monthly-seasonal time steps are being explored.
|
| Numerical limitations and issues :
|
Concerns about extrapolations beyond range of data used for model calibration and parameterization.
|
Testing
| Available calibration data sets:
|
Calibration data consist of compilations of river N, P, Si and C annual yields by form.
|
| Available test data sets:
|
Global (GEMS-GLORI), regional, national and literature compilations. A subset used for validation.
|
| Ideal data for testing:
|
Robust river nutrient fluxes near the mouth representative of annual, contemporary conditions.
|
User groups
| Currently or plans for collaborating with:
|
Model is the result of an international collaboration that is a UNESCO-IOC workgroup (Global NEWS).
|
Documentation
| Key papers of the model:
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Papers published in Global Biogeochem. Cycles listed on Global NEWS website; code not published yet.
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| Is there a manual available:
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yes
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| Model website if any:
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http://www.marine.rutgers.edu/globalnews/
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| Comments:
|
Particulates model is regression-based, while dissolved model is more conceptual-mechanistic. Conceptual framework and data sets in development since 2002. Integrated modeling code framework (GNE) developed in 2007; currently tested on Windows only, but can be easily adapted to other platforms.
|
Issues
Help
Input Files
Output Files
Download
Source |
