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Components of the multivariate least-squares regression of the MLS observations. (A–C) Components of H2Oov-entry anomaly due to the QBO, BD, and ΔT; D shows the residual (all with units of ppm). The solid lines are from the regression using MERRA estimates of BD and ΔT, whereas the dotted lines are from the fit using ERAi estimates for the indices.
