Analysis sensitivity of adaptive observation (one obs.
selected from ensemble spread method over
ocean) and routine observations (every grid point over land) in Lorenz-40 variable model
10-day
forecast RMS error
Analysis sensitivity
¥ About 17% information of the analysis comes from observations
over land.
¥ About 85% information comes from
observation for the adaptive observation (a single observation over
ocean).
¥ The single adaptive observation is more important than single
observation over land.