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FIG. 17. Outgoing longwave radiation (OLR) anomalies (shaded) and 200-hPa vector wind anomalies and isotachs for (a) DJF 1998/99, (b) MAM 1999, (c) JJA 1999, and d) SON 1999. Contour interval for isotachs is 4 m s-1. Shading interval for OLR anomalies is 10 W m-2. Anomalies are departures from the 1979–95 base period monthly means.