MIKE FM DA Overview

Data assimilation is about improving model predictions with measurements. This guide shows you how to apply data assimilation in MIKE FM.

This guide

The documentation of MIKE FM DA consists of the following pages:

• Overview: (this page) - overall description, scope and limitations
• Introduction - what is data assimilation?
• Ensemble modelling - how to do ensemble modelling in MIKE FM.
• Quick start - if you just want to get going...
• Examples - downloadable examples and descriptions
• Reference manual - complete description of all settings
• Scientific description: (not yet available)

See also MIKE Zero documentation for more on MIKE FM.

Scope

MIKE FM DA is a module within in the MIKE FM framework. It covers the following model types:

• Hydrodynamics (HD)
  • Temperature and Salinity (TS)
• Transport (TR)
• Mud Transport (MT)
• ECOLAB (EL) (in development)
• Spectral Waves (SW) (full spectrum formulation)

And combinations of these coupled or de-coupled; both 2d and 3d.

Disclaimer and limitations

This is a model under continuous development.

Known limitations:

• HD coupled with TR/EL/MT: If HD is run as an ensemble model, AD-process modules (TR/MT/...) can only run in ensemble mode too! If the user needs to run process modules based on a single HD result (with data assimilation), they need to save it first as HD decoupling output.
• HD-SW: It is not possible to run a fully coupled HD-SW with ensemble of both HD and SW.
• Quasi-stationary time formulation is not supported.
• It is not possible to run ensemble models with non-equidistant calendar forcing files.