Atlantic climate variability and predictability: A CLIVAR perspective od Hurrell, J, Visbeck, M, Busalacchi, A, Clarke, R, Delworth, T, Dickson, R, Johns, W, Koltermann, K, Kushnir, Y, Marshall, D, Mauritzen, C, McCartney, MS, Piola, A, Reason, C, Reverdin, G, Schott, F, Sutton, R, Wainer, I, Wright, D