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.