References for Blocking Webpabe Carrera, M. L., R. W. Higgins, and V. E. Kousky, 2004: Downstream weather impacts associated with atmospheric blocking over the Northeast Pacific. J. Climate, in press. Chen, W. Y., and H. M. Van den Dool, 1995: Low-frequency anomalies in the NMC MRF model and reality. J. Climate, 8, 1369-1385. Chen, W. Y., and H. M. Van den Dool, 1997: Asymmetric impact of tropical SST anomalies on atmospheric internal variability over the North Pacific. J. Atmos. Sci., 54, 725-740. Chen, W. Y., and H. M. Van den Dool, 1999: Significant change of extratropical natural variability and potential predictability associated with the El Niņo/Southern Oscillation. Tellus, 51A, 790-802. Higgins, R. W., and S. D. Schubert, 1994: Simulated life cycles of persistent anticyclonic anomalies over the North Pacific: Role of synoptic-scale eddies. J. Atmos. Sci., 51, 3238-3260. Higgins, R. W., and S. D. Schubert, 1996: Simulations of persistent North Pacific circulation anomalies and interhemispheric teleconnections. J. Atmos. Sci., 53, 188-207. Higgins, R. W., and K. C. Mo, 1997: Persistent North Pacific circulation anomalies and the tropical intraseasonal oscillation. J. Climate, 10, 223-244.