WPNM-M3

Data assimilation combines information from observations and the background to find an ______?

• Observing system

• Analysis

• Evaluation

• Application

Data assimilation is based on:

• Bayes' Theorem

• Pythagoras Theorem

• Binomial Theorem

• Mid Point Theorem

The analysis probability density function is referred to as the _____?

• Increment

• Likelihood

• Prior

• Posterior

A cycling data assimilation typically uses a short-range forecast from the previous cycle as the background.

• True

• False

Which observation type does AMDAR belong to?

• Aircraft

• Satellite

• Radar

• Surface

Satellite observations provide information on the atmosphere over land only.

• True

• False

Observations are considered sparse compared to the global model state space.

• True

• False

Which data assimilation method automatically assumes all observations are valid at the analysis time?

• Hybrid 4D-Var

• 4D-Var

• 3D-Var FGAT

• 3D-Var

3D-Var always assumes which of the following?

• No errors

• Gaussian errors

• Correlated observation errors

• Systematic errors

The 3D-Var cost function has two main components, the background penalty and the _____?

• Ensemble penalty

• Analysis penalty

• New penalty

• Observation penalty