Time series of Error and Coupling Index
Coupling Index (
) is the forcing direction (given by the dynamical rule) averaged over a given area.
CI = 1
means all gridpoints in the given area experience ocean-driving anomalies.
CI = 0
means either no anomalies or ocean-driving cases cancel with atmosphere-driving cases.
CI = -1
means all gridpoints in the given area experience atmosphere-driving anomalies.
CI is obtained from the Reanalysis data.