MESH (Modélisation Environmentale Communautaire - Surface Hydrology)

MESH is the hydrology land-surface scheme (HLSS) of Environment and Climate Change Canada's (ECCC's) community environmental modelling system, and is complimentary to ECCC's GEM-Hydro modelling platform. MESH allows different surface component models to coexist within the same modelling framework so that they can easily be compared for the same experiment.

SurfaceHydrologyWATCLASShydrology land-surface scheme

Alias

MEC-Surface & Hydrology

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Initial contribute: 2020-01-05

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Environment and Climate Change Canada
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Application-focused categoriesNatural-perspectiveLand regions

Detailed Description

English {{currentDetailLanguage}} English

Quoted from: https://wiki.usask.ca/display/MESH/About+MESH 

MESH (Modélisation Environnementale communautaire - Surface Hydrology) is the hydrology land-surface scheme (HLSS) of Environment and Climate Change Canada's (ECCC's) community environmental modelling system (Pietroniro et al. 2007), and is complimentary to ECCC's GEM-Hydro modelling platform. MESH allows different surface component models to coexist within the same modelling framework so that they can easily be compared for the same experiment using exactly the same forcings, interpolation procedures, grid, time period, time step and output specifications. An important feature of MESH is its ability to read atmospheric forcings from files instead of obtaining them from an atmospheric model. This makes it possible to test changes to the land surface schemes offline and to drive the HLSS with forcing data from other sources such as direct observations or reanalysis products. The main developers and users of MESH are currently with the Global Institute for Water Security (GIWS), located at the University of Saskatchewan.

Early stages in the evolution of Environment Canada's atmospheric-hydrologic-land-surface modelling system are described in Pietroniro et al. (2007). A conceptual framework for model development was initiated using different degrees of model coupling that range from a linked model which requires separate calibration of the atmospheric model and the hydrological model to a complete two way coupled model Soulis et al. (2005). MESH evolved from the WATCLASS model  which links WATFLOOD routing model to the Canadian Land Surface Scheme (CLASS), was used as a basis for coupling with both weather and climate atmospheric models.

Below quoted from https://research-groups.usask.ca/hydrology/modelling/mesh.php#BenefitsandAdvantages 

Two important advantages of the MESH system are that

  • It is an 'open' community system
  • It is part of an operational forecasting system in use with Environment and Climate Change Canada

This not only means that researchers and end-users may use and modify it freely, but also that MESH will continue to improve over the years, benefitting from improvements made to the modelling system for both research-related and operational purposes.

The development of MESH ties directly into a series of existing projects and programs in Canada, including

  • The Drought Research Initiative (DRI)
  • The National Agri-Environmental Standards Initiative (NAESI)
  • The International Polar Year (IPY)
  • The network for Improved Processes, Parameterization and Prediction in cold-regions hydrology (IP3)
  • The Changing Cold Regions Network (CCRN)
  • The Global Water Futures program (GWF)

The system permits several different surface models to coexist within the same modelling framework, enabling ready comparison of the outputs they generate from exactly the same forcings, interpolation procedures, grid, time-period, time-step, and other specifications. The coupler may also be used to link models running on different grids, and potentially on different time steps. The current implementation includes a choice of three land-surface schemes:

  • a simple force-restore scheme
  • a version of the Soil-Vegetation-Snow (SVS) LSS
  • the Canadian Land Surface Scheme (CLASS)

One of the primary goals set for MESH is to improve the description and quantification of the importance of sub-grid variability; to achieve this, CLASS may be configured to run on a number of different HRUs or tiles within each gridcell, allowing subgrid landscape variability to be taken into account. MESH then permits the routing of water and transfers of energy both between tiles within a grid, and between grids.

How to obtain MESH

Environment and Climate Change Canada's Hydrometeorology and Arctic Laboratory, with support from IP3, IPY, and DRI, has produced a stand-alone version of the MESH system, which reads atmospheric forcings from files rather than requiring the atmospheric model to be run concurrently: it is available for download here.

If you have any enquiries relating to MESH, please contact bruce.davison@canada.ca of Environment and Climate Change Canada's National Hydrological Research Centre in Saskatoon. Further information is available on the MESH wiki.

模型元数据

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MESH community (2020). MESH (Modélisation Environmentale Communautaire - Surface Hydrology), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/c27fab58-e846-4b21-bb5e-96215129133b
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Contributor(s)

Initial contribute : 2020-01-05

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Authorship

:  
Environment and Climate Change Canada
:  
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