A list of the observations and expected responses
to different external forcings with name
Y, X, ctlruns, nruns.X and Xtilde
where
Y: the \(5^\circ \times 5^\circ\) gridded observations on global scale
X: a data matrix of the expected responses to external forcing;
ctlruns: replicates of control runs from pre-industrial simulations
nruns.X: number of runs for the estimated responses to external forcings
Xtilde: the selected estimated responses to external forcing ANT and NAT