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Linking Weather and Climate

  • Randall M. Dole
Chapter
Part of the Meteorological Monographs book series (METEOR, volume 33, No. 55)

Abstract

Historically, the atmospheric sciences have tended to treat problems of weather and climate separately. The real physical system, however, is a continuum, with short-term (minutes to days) “weather” fluctuations influencing climate variations and change, and, conversely, more slowly varying aspects of the system (typical time scales of a season or longer) affecting the weather that is experienced. While this past approach has served important purposes, it is becoming increasingly apparent that in order to make progress in addressing many socially important problems, an improved understanding of the connections between weather and climate is required.

This overview summarizes the progress over the last few decades in the understanding of the phenomena and mechanisms linking weather and climate variations. The principal emphasis is on developments in understanding key phenomena and processes that bridge the time scales between synoptic-scale weather variability (periods of approximately 1 week) and climate variations of a season or longer. Advances in the ability to identify synoptic features, improve physical understanding, and develop forecast skill within this time range are reviewed, focusing on a subset of major, recurrent phenomena that impact extratropical wintertime weather and climate variations over the Pacific—North American region. While progress has been impressive, research has also illuminated areas where future gains are possible. This article concludes with suggestions on near-term directions for advancing the understanding and capabilities to predict the connections between weather and climate variations.

Keywords

Rossby Wave Potential Vorticity Storm Track Forecast Skill Transient Eddy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Alexander, M. A., I. Blade, M. Newman, J. R. Lanzante, N. C. Lau, and J. D. Scott, 2002: The atmospheric bridge: The influence of ENSO teleconnections on air-sea interaction over the global oceans. J. Climate, 15, 2205–2231.Google Scholar
  2. Allen, M. R., 1999: Do it yourself climate prediction. Nature, 401, 642.Google Scholar
  3. -, and D. A. Stainforth, 2002: Towards objective probabalistic climate forecasting. Nature, 419, 228.Google Scholar
  4. Ambaum, M. H. P., B. J. Hoskins, and D. B. Stephenson, 2001: Arctic Oscillation or North Atlantic Oscillation? J. Climate, 14, 3495–3507.Google Scholar
  5. Andrews, D. G., and M. E. McIntyre, 1976: Planetary waves in horizontal and vertical shear: The generalized Eliassen-Palm relation and the mean zonal acceleration. J. Atmos. Sci., 33, 2031–2048.Google Scholar
  6. Andrews, E. D., R. C. Antweiler, P. J. Neiman, and F. M. Ralph, 2004: Influence of ENSO on flood frequency along the California coast. J. Climate, 17, 337–348.Google Scholar
  7. Arkin, P. A., and P. J. Webster, 1985: Annual and interannual variability of tropical-extratropical interaction: An empirical study. Mon. Wea. Rev., 113, 1510–1523.Google Scholar
  8. Baldwin, M. P., and T. J. Dunkerton, 1999: Propagation of the Arctic Oscillation from the stratosphere to the troposphere. J. Geophys. Res., 104D, 30 937–30 946.Google Scholar
  9. -, and-, 2001: Stratospheric harbingers of anomalous weather regimes. Science, 294, 581–584.Google Scholar
  10. -, D. B. Stephenson, D. W. J. Thompson, T. J. Dunkerton, A. J. Charlton, and A. O’Neill, 2003a: Stratospheric memory and skill of extended-range weather forecasts. Science, 301, 636–640.Google Scholar
  11. -, D. W. J. Thompson, E. F. Shuckburgh, W. A. Norton, and N. P. Gillett, 2003b: Weather from the stratosphere? Science, 301, 317.Google Scholar
  12. Bao, J. W., S. A. Michelson, P. J. Neiman, F. M. Ralph, and J. M. Wilczak, 2006: Interpretation of enhanced integrated water vapor bands associated with extratropical cyclones: Their formation and connection to tropical moisture. Mon. Wea. Rev., 134, 1063–1080.Google Scholar
  13. Barnston, A. G., and R. E. Livezey, 1987: Classification, seasonality, and persistence of low-frequency atmospheric circulation patterns. Mon. Wea. Rev., 115, 1083–1126.Google Scholar
  14. Barsugli, J. J., and P. D. Sardeshmukh, 2002: Global atmospheric sensitivity to tropical SST anomalies throughout the Indo-Pacific basin. J. Climate, 15, 3427–3442.Google Scholar
  15. -, J. S. Whitaker, A. F. Loughe, P. D. Sardeshmukh, and Z. Toth, 1999: The effect of the 1997/98 El Niño on individual largescale weather events. Bull. Amer. Meteor. Soc., 80, 1399–1411.Google Scholar
  16. -, S. I. Shin, and P. D. Sardeshmukh, 2005: Tropical climate regimes and global climate sensitivity in a simple setting. J. Atmos. Sci., 62, 1226–1240.Google Scholar
  17. Berggren, R., B. Bolin, and C. G. Rossby, 1949: An aerological study of zonal motion, its perturbation and breakdown. Tellus, 1, 14–37.Google Scholar
  18. Bergman, J. W., H. H. Hendon, and K. M. Weickmann, 2001: Intraseasonal air-sea interactions at the onset of El Niño. J. Climate, 14, 1702–1719.Google Scholar
  19. Bjerknes, J., 1969: Atmospheric teleconnections from the equatorial Pacific. Mon. Wea. Rev., 97, 163–172.Google Scholar
  20. Black, R. X., 1997: Deducing anomalous wave source regions during the life cycles of persistent flow anomalies. J. Atmos. Sci., 54, 895–907.Google Scholar
  21. -, 2002: Stratospheric forcing of surface climate in the Arctic oscillation. J. Climate, 15, 268–277.Google Scholar
  22. -, and R. M. Dole, 1993: The dynamics of large-scale cyclogenesis over the North Pacific Ocean. J. Atmos. Sci., 50, 421–442.Google Scholar
  23. -, and-, 2000: Storm tracks and barotropic deformation in climate models. J. Climate, 13, 2712–2728.Google Scholar
  24. -, and B. A. McDaniel, 2004: Diagnostic case studies of the northern annular mode. J. Climate, 17, 3990–4004.Google Scholar
  25. -, D. A. Salstein, and R. D. Rosen, 1996: Interannual modes of variability in atmospheric angular momentum. J. Climate, 9, 2834–2849.Google Scholar
  26. Blackmon, M. L., 1976: Climatological spectral study of 500 mb geopotential height of the Northern Hemisphere. J. Atmos. Sci., 33, 1607–1623.Google Scholar
  27. -, J. M. Wallace, N. C. Lau, and S. L. Mullen, 1977: Observational study of Northern Hemisphere wintertime circulation. J. Atmos. Sci., 34, 1040–1053.Google Scholar
  28. -, R. A. Madden, J. M. Wallace, and D. S. Gutzler, 1979: Geographical variations in the vertical structure of geopotential height fluctuations. J. Atmos. Sci., 36, 2450–2466.Google Scholar
  29. -, Y. H. Lee, and J. M. Wallace, 1984: Horizontal structure of 500-mb height fluctuations with long, intermediate, and shorttime scales. J. Atmos. Sci., 41, 961–979.Google Scholar
  30. Borges, M. D., and P. D. Sardeshmukh, 1995: Barotropic Rossby wave dynamics of zonally varying upper-level flows during northern Winter. J. Atmos. Sci., 52, 3779–3796.Google Scholar
  31. Bove, M. C., J. J. O’Brien, J. B. Eisner, C. W. Landsea, and X. Niu, 1998: Effect of El Niño on U.S. landfalling hurricanes, revisited. Bull. Amer. Meteor. Soc., 79, 2477–2482.Google Scholar
  32. Branstator, G., 1985: Analysis of general circulation model sea surface temperature anomaly simulations using a linear model. Part I: Forced solutions. J. Atmos. Sci., 42, 2225–2241.Google Scholar
  33. -, 1987: A striking example of the atmospheres leading traveling pattern. J. Atmos. Sci., 44, 2310–2323.Google Scholar
  34. -, 1995: Organization of storm track anomalies by recurring lowfrequency circulation anomalies. J. Atmos. Sci., 52, 207–226.Google Scholar
  35. -, 2002: Circumglobal teleconnections, the jet stream waveguide, and the North Atlantic oscillation. J. Climate, 15, 1893–1910.Google Scholar
  36. Buizza, R., M. Miller, and T. N. Palmer, 1999: Stochastic representation of model uncertainties in the ECMWF Ensemble Prediction System. Quart. J. Roy. Meteor. Soc., 125, 2887–2908.Google Scholar
  37. -, P. L. Houtekamer, Z. Toth, G. Pellerin, M. Z. Wei, and Y. J. Zhu, 2005: A comparison of the ECMWF, MSC, and NCEP global ensemble prediction systems. Mon. Wea. Rev., 133, 1076–1097.Google Scholar
  38. Cai, M., 1992: A physical interpretation for the stability property of a localized disturbance in a deformation flow. J. Atmos. Sci., 49, 2177–2182.Google Scholar
  39. -, and M. Mak, 1990: On the basic dynamics of regional cyclogenesis. J. Atmos. Sci., 47, 1417–1442.Google Scholar
  40. -, J. S. Whitaker, R. M. Dole, and K. L. Paine, 1996: Dynamics of systematic errors in the NMC medium range forecast model. Mon. Wea. Rev., 124, 265–276.Google Scholar
  41. Cane, M. A., S. E. Zebiak, and S. C. Dolan, 1986: Experimental forecasts of El Niño. Nature, 321, 827–832.Google Scholar
  42. Cayan, D. R., K. T. Redmond, and L. G. Riddle, 1999: ENSO and hydrologic extremes in the western United States. J. Climate, 12, 2881–2893.Google Scholar
  43. CCSP, 2003: Strategic plan for the U.S. Climate Change Science Program. Climate Change Science Program and the Subcommittee on Global Change Research Rep., Climate Change Program Office, Washington, DC, 202 pp.Google Scholar
  44. Chang, E. K. M., 1993: Downstream development of baroclinic waves as inferred from regression-analysis. J. Atmos. Sci., 50, 2038–2053.Google Scholar
  45. -, 2001: The structure of baroclinic wave packets. J. Atmos. Sci., 58, 1694–1713.Google Scholar
  46. -, 2003: Midwinter suppression of the Pacific storm track activity as seen in aircraft observations. J. Atmos. Sci., 60, 1345–1358.Google Scholar
  47. -, 2005: The impact of wave packets propagating across Asia on Pacific cyclone development. Mon. Wea. Rev., 133, 1998–2015.Google Scholar
  48. -, and D. B. Yu, 1999: Characteristics of wave packets in the upper troposphere. Part I: Northern Hemisphere winter. J. Atmos. Sci., 56, 1708–1728.Google Scholar
  49. -, and Y. F. Fu, 2002: Interdecadal variations in Northern Hemisphere winter storm track intensity. J. Climate, 15, 642–658.Google Scholar
  50. -, S. Y. Lee, and K. L. Swanson, 2002: Storm track dynamics. J. Climate, 15, 2163–2183.Google Scholar
  51. Charney, J. G., 1947: The dynamics of long waves in a baroclinic westerly current. J. Meteor., 4, 136–162.Google Scholar
  52. -, 1973: Planetary fluid dynamics. Dynamic Meteorology, P. Morel, Ed., Reidel, 97–352.Google Scholar
  53. -, and P. G. Drazin, 1961: Propagation of planetary-scale disturbances from the lower to the upper atmosphere. J. Geophys. Res., 66, 83–109.Google Scholar
  54. -, and J. G. DeVore, 1979: Multiple flow equilibria in the atmosphere and blocking. J. Atmos. Sci., 36, 1205–1216.Google Scholar
  55. -, and D. M. Straus, 1980: Form-drag instability, multiple equilibria, and propagating planetary waves in baroclinic, orographically forced, planetary wave systems. J. Atmos. Sci., 37, 1157–1176.Google Scholar
  56. -, J. Shukla, and K. C. Mo, 1981: Comparison of a barotropic blocking theory with observation. J. Atmos. Sci., 38, 762–779.Google Scholar
  57. Cheng, X., and J. M. Wallace, 1993: Cluster analysis of the Northern Hemisphere wintertime 500-hPa height field: Spatial patterns. J. Atmos. Sci., 50, 2674–2696.Google Scholar
  58. Colucci, S. J., 1985: Explosive cyclogenesis and large-scale circulation changes: Implications for atmospheric blocking. J. Atmos. Sci., 42, 2701–2717.Google Scholar
  59. -, 1987: Comparative diagnosis of blocking versus nonblocking planetary-scale circulation changes during synoptic-scale cyclogenesis. J. Atmos. Sci., 44, 124–139.Google Scholar
  60. Compo, G. P., and P. D. Sardeshmukh, 2004: Storm track predictability on seasonal and decadal scales. J. Climate, 17, 3701–3720.Google Scholar
  61. -,-, and C. Penland, 2001: Changes of subseasonal variability associated with El Niño. J. Climate, 14, 3356–3374.Google Scholar
  62. COPES, 2005: The World Climate Research Programme Strategic Framework 2005–2015: Coordinated Observation and Prediction of the Earth System (COPES). WCRP-123, WMO/TDF-1291, World Meteorological Organization, Geneva, Switzerland, 65 pp.Google Scholar
  63. Davis, C. A., and K. A. Emanuel, 1991: Potential vorticity diagnostics of cyclogenesis. Mon. Wea. Rev., 119, 1929–1953.Google Scholar
  64. Dickson, R. R., and J. Namias, 1976: North American influences on circulation and climate of the North Atlantic sector. Mon. Wea. Rev., 104, 1255–1265.Google Scholar
  65. Doblas-Reyes, F. J., R. Hagedorn, and T. N. Palmer, 2005: The rationale behind the success of multi-model ensembles in seasonal forecasting. II. Calibration and combination. Tellus, 57A, 234–252.Google Scholar
  66. Dole, R. M., 1982: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation. Ph.D. thesis, Massachusetts Institute of Technology, 226 pp.Google Scholar
  67. -, 1983: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation. Large-Scale Dynamical Processes in the Atmosphere, B. J. Hoskins and R. P. Pearce, Eds., Academic Press, 95–110.Google Scholar
  68. -, 1986a: The life cycles of persistent anomalies and blocking over the North Pacific. Advances in Geophysics, Vol. 29, Academic Press, 31–69.Google Scholar
  69. -, 1986b: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation: Structure. Mon. Wea. Rev., 114, 178–207.Google Scholar
  70. -, 1987: Persistent large-scale flow anomalies. Part II: Relationships to variations in synoptic-scale eddy activity and cyclogenesis. The Nature and Prediction of Extratropical Weather Systems, Vol. II, European Centre for Medium-Range Weather Forecasts, 73–122.Google Scholar
  71. -, 1989: Life cycles of persistent anomalies. Part I: Evolution of 500 mb height fields. Mon. Wea. Rev., 117, 177–211.Google Scholar
  72. -, and N. D. Gordon, 1983: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation: Geographical distribution and regional persistence characteristics. Mon. Wea. Rev., 111, 1567–1586.Google Scholar
  73. -, and R. X. Black, 1990: Life cycles of persistent anomalies. Part II: The development of persistent negative height anomalies over the North Pacific Ocean. Mon. Wea. Rev., 118, 824–846.Google Scholar
  74. Eady, E. T., 1949: Long waves and cyclone waves. Tellus, 1, 33–52.Google Scholar
  75. Edmon, H. J., B. J. Hoskins, and M. E. McIntyre, 1980: Eliassen-Palm cross-sections for the troposphere. J. Atmos. Sci., 37, 2600–2616.Google Scholar
  76. Egger, J., 1977: On the linear theory of the atmospheric response to sea surface temperature anomalies. J. Atmos. Sci., 34, 603–614.Google Scholar
  77. Eliasen, E., and B. Machenhauer, 1965: A study of the fluctuations of the atmospheric planetary flow patterns represented by spherical harmonics. Tellus, 17, 220–238.Google Scholar
  78. Elliott, R. D., and T. B. Smith, 1949: A study of the effects of large blocking highs on the general circulation of the Northern Hemisphere westerlies. J. Meteor., 6, 67–85.Google Scholar
  79. Emanuel, K. A., 2001: The contribution of tropical cyclones to the oceans’ meridional heat transport. J. Geophys. Res., 106, 14 777–14 781.Google Scholar
  80. -, 2002: A simple model of multiple climate regimes. J. Geophys. Res., 107, 4077, doi: 10.1029/2001JD001002.Google Scholar
  81. Epstein, E. S., 1969: A scoring system for probability forecasts of ranked categories. J. Appl. Meteor., 8, 985–987.Google Scholar
  82. Farrell, B., 1982: The initial growth of disturbances in a baroclinic flow. J. Atmos. Sci., 39, 1663–1686.Google Scholar
  83. -, 1984: Modal and non-modal baroclinic waves. J. Atmos. Sci., 41, 668–673.Google Scholar
  84. -, 1985: Transient growth of damped baroclinic waves. J. Atmos. Sci., 42, 2718–2727.Google Scholar
  85. Feldstein, S. B., 1998: An observational study of the intraseasonal poleward propagation of zonal mean flow anomalies. J. Atmos. Sci., 55, 2516–2529.Google Scholar
  86. -, 2000: The timescale, power spectra, and climate noise properties of teleconnection patterns. J. Climate, 13, 4430–4440.Google Scholar
  87. -, 2001: Friction torque dynamics associated with intraseasonal length-of-day variability. J. Atmos. Sci., 58, 2942–2953.Google Scholar
  88. -, 2002: Fundamental mechanisms of the growth and decay of the PNA teleconnection pattern. Quart. J. Roy. Meteor. Soc., 128, 775–796.Google Scholar
  89. -, and S. Lee, 1998: Is the atmospheric zonal index driven by an eddy feedback? J. Atmos. Sci., 55, 3077–3086.Google Scholar
  90. Frederiksen, J. S., 1983: A unified three-dimensional instability theory of the onset of blocking and cyclogenesis. Part II: Teleconnection patterns. J. Atmos. Sci., 40, 2593–2609.Google Scholar
  91. -, and G. Branstator, 2005: Seasonal variability of teleconnection patterns. J. Atmos. Sci., 62, 1346–1365.Google Scholar
  92. Gershunov, A., 1998: ENSO influence on intraseasonal extreme rainfall and temperature frequencies in the contiguous United States: Implications for long-range predictability. J. Climate, 11, 3192–3203.Google Scholar
  93. -, and T. P. Barnett, 1998: ENSO influence on intraseasonal extreme rainfall and temperature frequencies in the contiguous United States: Observations and model results. J. Climate, 11, 1575–1586.Google Scholar
  94. -, and D. R. Cayan, 2003: Heavy daily precipitation frequency over the contiguous United States: Sources of climatic variability and seasonal predictability. J. Climate, 16, 2752–2765.Google Scholar
  95. Gill, A. E., 1980: Some simple solutions for heat-induced tropical circulation. Quart. J. Roy. Meteor. Soc., 106, 447–462.Google Scholar
  96. -, 1982: Atmosphere—Ocean Dynamics. Academic Press, 662 pp.Google Scholar
  97. Gilman, D. L., 1985: Long-range forecasting-The present and the future. Bull. Amer. Meteor. Soc., 66, 159–164.Google Scholar
  98. Gray, W. M., 1984a: Atlantic seasonal hurricane frequency. Part I: El Niño and 30 mb quasi-biennial oscillation influences. Mon. Wea. Rev., 112, 1649–1668.Google Scholar
  99. -, 1984b: Atlantic seasonal hurricane frequency. Part II: Forecasting its variability. Mon. Wea. Rev., 112, 1669–1683.Google Scholar
  100. Green, J. S. A., 1977: The weather during July 1976: Some dynamical considerations of the drought. Weather, 32, 120–128.Google Scholar
  101. Grose, W. L., and B. J. Hoskins, 1979: Influence of orography on large-scale atmospheric flow. J. Atmos. Sci., 36, 223–234.Google Scholar
  102. Hagedorn, R., F. J. Doblas-Reyes, and T. N. Palmer, 2005: The rationale behind the success of multi-model ensembles in seasonal forecasting. I. Basic concept. Tellus, 57A, 219–233.Google Scholar
  103. Haines, K., and J. Marshall, 1987: Eddy-forced coherent structures as a prototype of atmospheric blocking. Quart. J. Roy. Meteor. Soc., 113, 681–704.Google Scholar
  104. Halpert, M. S., and C. F. Ropelewski, 1992: Surface temperature patterns associated with the Southern Oscillation. J. Climate, 5, 577–593.Google Scholar
  105. Hamill, T. M., J. S. Whitaker, and X. Wei, 2004a: Medium-range ensemble “re-forecasting.” Bull. Amer. Meteor. Soc., 85, 507–508.Google Scholar
  106. -,-, and-, 2004b: Ensemble reforecasting: Improving medium-range forecast skill using retrospective forecasts. Mon. Wea. Rev., 132, 1434–1447.Google Scholar
  107. -,-, and S. L. Mullen, 2006: Reforecasts: An important dataset for improving weather predictions. Bull. Amer. Meteor. Soc., 87, 33–46.Google Scholar
  108. Hansen, A. R., and T.-C. Chen, 1982: A spectral energetics analysis of atmospheric blocking. Mon. Wea. Rev., 110, 1146–1165.Google Scholar
  109. -, and A. Sutera, 1986: On the probability density distribution of planetary-scale atmospheric wave amplitude. J. Atmos. Sci., 43, 3250–3265.Google Scholar
  110. -, and-, 1988: Planetary wave amplitude bimodality in the Southern Hemisphere. J. Atmos. Sci., 45, 3771–3783.Google Scholar
  111. Harnik, N., and E. K. M. Chang, 2004: The effects of variations in jet width on the growth of baroclinic waves: Implications for midwinter Pacific storm track variability. J. Atmos. Sci., 61, 23–40.Google Scholar
  112. Held, I. M., 1983: Stationary and quasi-stationary eddies in the extratropical troposphere: Theory. Large-scale Dynamical Processes in the Atmosphere, B. J. Hoskins and R. P. Pearce, Eds., Academic Press, 127–168.Google Scholar
  113. -, and B. J. Hoskins, 1985: Large-scale eddies and the generalcirculation of the troposphere. Advances in Geophysics, Vol. 28, Academic Press, 3–31.Google Scholar
  114. -, S. W. Lyons, and S. Nigam, 1989: Transients and the extratropical response to El Niño. J. Atmos. Sci., 46, 163–174.Google Scholar
  115. Hendon, H. H., and M. L. Salby, 1994: The life-cycle of the Madden-Julian Oscillation. J. Atmos. Sci., 51, 2225–2237.Google Scholar
  116. -, C. Zhang, and J. D. Glick, 1999: Interannual variation of the Madden-Julian Oscillation during austral summer. J. Climate, 12, 2538–2550.Google Scholar
  117. -, B. Liebmann, M. Newman, J. D. Glick, and J. E. Schemm, 2000: Medium-range forecast errors associated with active episodes of the Madden-Julian Oscillation. Mon. Wea. Rev., 128, 69–86.Google Scholar
  118. Higgins, R. W., and S. D. Schubert, 1993: Low-frequency synopticeddy activity in the Pacific storm track. J. Atmos. Sci., 50, 1672–1690.Google Scholar
  119. -, and-, 1994: Simulated life-cycles of persistent anticyclonic anomalies over the North Pacific—Role of synoptic-scale eddies. J. Atmos. Sci., 51, 3238–3260.Google Scholar
  120. -, and-, 1996: Simulations of persistent North Pacific circulation anomalies and interhemispheric teleconnections. J. Atmos. Sci., 53, 188–207.Google Scholar
  121. -, and K. C. Mo, 1997: Persistent North Pacific circulation anomalies and the tropical intraseasonal oscillation. J. Climate, 10, 223–244.Google Scholar
  122. -, J. K. E. Schemm, W. Shi, and A. Leetmaa, 2000: Extreme precipitation events in the western United States related to tropical forcing. J. Climate, 13, 793–820.Google Scholar
  123. Hoerling, M. P., and M. Ting, 1994: Organization of extratropical transients during El Niño. J. Climate, 7, 745–766.Google Scholar
  124. -, and A. Kumar, 1997: Origins of extreme climate states during the 1982–83 ENSO winter. J. Climate, 10, 2859–2870.Google Scholar
  125. -, and-, 2000: Understanding and predicting extratropical teleconnections related to ENSO. El Niño and the Southern Oscillation: Multiscacle Variability and Global and Regional Impacts, H. F. Diaz and V. Markgraf, Eds., Cambridge University Press, 57–88.Google Scholar
  126. -, and-, 2003: The perfect ocean for drought. Science, 299, 691–694.Google Scholar
  127. -,-, and M. Zhong, 1997: El Niño, La Niña, and the nonlinearity of their teleconnections. J. Climate, 10, 1769–1786.Google Scholar
  128. Holopainen, E., and C. Fortelius, 1987: High-frequency transient eddies and blocking. J. Atmos. Sci., 44, 1632–1645.Google Scholar
  129. Holton, J. R., 2004. An Introduction to Dynamic Meteorology. Elsevier Academic Press, 535 pp.Google Scholar
  130. Horel, J. D., and J. M. Wallace, 1981: Planetary-scale atmospheric phenomena associated with the Southern Oscillation. Mon. Wea. Rev., 109, 813–829.Google Scholar
  131. Hoskins, B. J., 1983: Dynamical processes in the atmosphere and the use of models. Quart. J. Roy. Meteor. Soc., 109, 1–21.Google Scholar
  132. -, and D. J. Karoly, 1981: The steady linear response of a spherical atmosphere to thermal and orographic forcing. J. Atmos. Sci., 38, 1179–1196.Google Scholar
  133. -, and P. D. Sardeshmukh, 1987: A diagnostic study of the dynamics of the Northern-Hemisphere winter of 1985–86. Quart. J. Roy. Meteor. Soc., 113, 759–778.Google Scholar
  134. -, and T. Ambrizzi, 1993: Rossby-wave propagation on a realistic longitudinally varying flow. J. Atmos. Sci., 50, 1661–1671.Google Scholar
  135. -, A. J. Simmons, and D. G. Andrews, 1977: Energy dispersion in a barotropic atmosphere. Quart. J. Roy. Meteor. Soc., 103, 553–567.Google Scholar
  136. -, I. N. James, and G. H. White, 1983: The shape, propagation and mean-flow interaction of large-scale weather systems. J. Atmos. Sci., 40, 1595–1612.Google Scholar
  137. -, M. E. McIntyre, and A. W. Robertson, 1985: On the use and significance of isentropic potential vorticity maps. Quart. J. Roy. Meteor. Soc., 111, 877–946.Google Scholar
  138. Houtekamer, P. L., L. Lefaivre, J. Derome, H. Ritchie, and H. L. Mitchell, 1996: A system simulation approach to ensemble prediction. Mon. Wea. Rev., 124, 1225–1242.Google Scholar
  139. Hsu, H. H., 1987: Propagation of low-level circulation features in the vicinity of mountain-ranges. Mon. Wea. Rev., 115, 1864–1892.Google Scholar
  140. -, and J. M. Wallace, 1985: Vertical structure of wintertime teleconnection patterns. J. Atmos. Sci., 42, 1693–1710.Google Scholar
  141. Illari, L., 1984: A diagnostic study of the potential vorticity in a warm blocking anticyclone. J. Atmos. Sci., 41, 3518–3526.Google Scholar
  142. Iskenderian, H., 1995: A 10-year climatology of Northern Hemisphere tropical cloud plumes and their composite flow patterns. J. Climate, 8, 1630–1637.Google Scholar
  143. James, I., 1987: Suppression of baroclinic instability in horizontally sheared flows. J. Atmos. Sci., 44, 3710–3720.Google Scholar
  144. Jones, C., D. E. Waliser, J. K. E. Schemm, and W. K. M. Lau, 2000: Prediction skill of the Madden and Julian Oscillation in dynamical extended range forecasts. Climate Dyn., 16, 273–289.Google Scholar
  145. -,-, K. M. Lau, and W. Stern, 2004: The Madden-Julian oscillation and its impact on Northern Hemisphere weather predictability. Mon. Wea. Rev., 132, 1462–1471.Google Scholar
  146. Kalnay, E., 2003: Atmospheric Modeling, Data Assimilation, and Predictability. Cambridge University Press, 341 pp.Google Scholar
  147. -, S. J. Lord, and R. D. McPherson, 1998: Maturity of operational numerical weather prediction: Medium range. Bull. Amer. Meteor. Soc., 79, 2753–2769.Google Scholar
  148. Kessler, W. S., and R. Kleeman, 2000: Rectification of the Madden— Julian oscillation into the ENSO cycle. J. Climate, 13, 3560–3575.Google Scholar
  149. Kiladis, G. N., 1998: Observations of Rossby waves linked to convection over the eastern tropical Pacific. J. Atmos. Sci., 55, 321–339.Google Scholar
  150. -, and H. F. Diaz, 1989: Global climatic anomalies associated with extremes in the Southern Oscillation. J. Climate, 2, 1069–1090.Google Scholar
  151. -, and K. M. Weickmann, 1992a: Circulation anomalies associated with tropical convection during northern winter. Mon. Wea. Rev., 120, 1900–1923.Google Scholar
  152. -, and-, 1992b: Extratropical forcing of tropical Pacific convection during northern winter. Mon. Wea. Rev., 120, 1924–1938.Google Scholar
  153. -, and-, 1997: Horizontal structure and seasonality of largescale circulations associated with submonthly tropical convection. Mon. Wea. Rev., 125, 1997–2013.Google Scholar
  154. Klein, W. H., 1952: Some empirical characteristics of long waves on monthly mean charts. Mon. Wea. Rev., 80, 203–219.Google Scholar
  155. Klotzbach, P. J., and W. M. Gray, 2003: Forecasting September Atlantic basin tropical cyclone activity. Wea. Forecasting, 18, 1109–1128.Google Scholar
  156. -, and-, 2004: Updated 6–11-month prediction of Atlantic basin seasonal hurricane activity. Wea. Forecasting, 19, 917–934.Google Scholar
  157. Knutson, T. R., and K. M. Weickmann, 1987: 30–60 day atmospheric oscillations—Composite life-cycles of convection and circulation anomalies. Mon. Wea. Rev., 115, 1407–1436.Google Scholar
  158. Kok, C. J., and J. D. Opsteegh, 1985: Possible causes of anomalies in seasonal mean circulation patterns during the 1982–83 El Niño event. J. Atmos. Sci., 42, 677–694.Google Scholar
  159. Krishnamurti, T. N., and Coauthors, 2003: Improved skill for the anomaly correlation of geopotential heights at 500 hPa. Mon. Wea. Rev., 131, 1082–1102.Google Scholar
  160. Kumar, A., and M. P. Hoerling, 1997: Interpretation and implications of the observed inter-El Niño variability. J. Climate, 10, 83–91.Google Scholar
  161. -, and-, 2003: The nature and causes for the delayed atmospheric response to El Niño. J. Climate, 16, 1391–1403.Google Scholar
  162. Kushnir, Y., and J. M. Wallace, 1989: Low-frequency variability in the Northern Hemisphere winter: Geographical distribution, structure and time-scale dependence. J. Atmos. Sci., 46, 3122–3142.Google Scholar
  163. Lau, K. M., and P. H. Chan, 1985: Aspects of the 40–50 day oscillation during the Northern winter as inferred from outgoing longwave radiation. Mon. Wea. Rev., 113, 1889–1909.Google Scholar
  164. Lau, N. C., 1978: Three-dimensional structure of observed transient eddy statistics of Northern Hemisphere wintertime circulation. J. Atmos. Sci., 35, 1900–1923.Google Scholar
  165. -, 1979: Structure and energetics of transient disturbances in the Northern Hemisphere wintertime circulation. J. Atmos. Sci., 36, 982–995.Google Scholar
  166. -, 1985: Modeling the seasonal dependence of the atmospheric response to observed El Niños in 1972–76. Mon. Wea. Rev., 113, 1970–1996.Google Scholar
  167. -, 1988: Variability of the observed midlatitude storm tracks in relation to low-frequency changes in the circulation pattern. J. Atmos. Sci., 45, 2718–2743.Google Scholar
  168. -, and J. M. Wallace, 1979: Distribution of horizontal transports by transient eddies in the Northern Hemisphere wintertime circulation. J. Atmos. Sci., 36, 1844–1861.Google Scholar
  169. -, and E. O. Holopainen, 1984: Transient eddy forcing of the time-mean flow as identified by geopotential tendencies. J. Atmos. Sci., 41, 313–328.Google Scholar
  170. -, and M. J. Nath, 1991: Variability of the baroclinic and barotropic transient eddy forcing associated with monthly changes in the midlatitude storm tracks. J. Atmos. Sci., 48, 2589–2613.Google Scholar
  171. Lee, S., 1995a: Linear modes and storm tracks in a two-level primitive equation model. J. Atmos. Sci., 52, 1841–1862.Google Scholar
  172. -, 1995b: Localized storm tracks in the absence of local instability. J. Atmos. Sci., 52, 977–989.Google Scholar
  173. -, and I. M. Held, 1993: Baroclinic wave-packets in models and observations. J. Atmos. Sci., 50, 1413–1428.Google Scholar
  174. Lin, J. L., and Coauthors, 2006: Tropical intraseasonal variability in 14 IPCC AR4 climate models. Part I: Convective signals. J. Climate, 19, 2665–2690.Google Scholar
  175. Lorenz, E. N., 1963: Deterministic nonperiodic flow. J. Atmos. Sci., 20, 130–141.Google Scholar
  176. -, 1965: A study of the predictability of a 28-variable atmospheric model. Tellus, 17, 321–333.Google Scholar
  177. -, 1968a: The predictability of a flow which possesses many scales of motion. Tellus, 21, 289–307.Google Scholar
  178. -, 1969b: Atmospheric predictability as revealed by naturally occurring analogues. J. Atmos. Sci., 26, 636–646.Google Scholar
  179. Madden, R. A., and P. R. Julian, 1971: Detection of a 40-50 day oscillation in the zonal wind in the tropical Pacific. J. Atmos. Sci., 28, 702–708.Google Scholar
  180. -, and-, 1972: Description of global-scale circulation cells in the Tropics with a 40–50 day period. J. Atmos. Sci., 29, 1109–1123.Google Scholar
  181. -, and-, 1994: Observations of the 40–50-day tropical oscillation— A review. Mon. Wea. Rev., 122, 814–837.Google Scholar
  182. Mak, M., and M. Cai, 1989: Local barotropic instability. J. Atmos. Sci., 46, 3289–3311.Google Scholar
  183. McPhaden, M. J., 2004: Evolution of the 2002/03 El Niño. Bull. Amer. Meteor. Soc., 85, 677–695.Google Scholar
  184. McWilliams, J. C., 1980: An application of equivalent modons to atmospheric blocking. Dyn. Atmos. Oceans, 5, 43–66.Google Scholar
  185. Mo, K. C., 1999: Alternating wet and dry episodes over California and intraseasonal oscillations. Mon. Wea. Rev., 127, 2759–2776.Google Scholar
  186. -, and R. E. Livezey, 1986: Tropical-extratropical geopotential height teleconnections during the Northern Hemisphere winter. Mon. Wea. Rev., 114, 2488–2515.Google Scholar
  187. -, and R.W. Higgins, 1998a: Tropical convection and precipitation regimes in the western United States. J. Climate, 11, 2404–2423.Google Scholar
  188. -, and-, 1998b: Tropical influences on California precipitation. J. Climate, 11, 412–430.Google Scholar
  189. Molteni, F., S. Tibaldi, and T. N. Palmer, 1990: Regimes in the wintertime circulation over northern extratropics. 1. Observational evidence. Quart. J. Roy. Meteor. Soc., 116, 31–67.Google Scholar
  190. -, R. Buizza, T. N. Palmer, and T. Petroliagis, 1996: The ECMWF ensemble prediction system: Methodology and validation. Quart. J. Roy. Meteor. Soc., 122, 73–119.Google Scholar
  191. Morgan, M. C., and J. W. Nielsen-Gammon, 1998: Using tropopause maps to diagnose midlatitude weather systems. Mon. Wea. Rev., 126, 2555–2579.Google Scholar
  192. Mullen, S. L., 1986: The local balances of vorticity and heat for blocking anticyclones in a spectral general-circulation model. J. Atmos. Sci., 43, 1406–1441.Google Scholar
  193. -, 1987: Transient eddy forcing of blocking flows. J. Atmos. Sci., 44, 3–22.Google Scholar
  194. -, 1989: Model experiments on the impact of Pacific sea surface temperature anomalies on blocking frequency. J. Climate, 2, 997–1013.Google Scholar
  195. Murphy, A. H., 1971: A note on the ranked probability score. J. Appl. Meteor., 10, 155–156.Google Scholar
  196. Nakamura, H., 1992: Midwinter suppression of baroclinic wave activity in the Pacific. J. Atmos. Sci., 49, 1629–1642.Google Scholar
  197. -, and J. M. Wallace, 1990: Observed changes in baroclinic wave activity during the life-cycles of low-frequency circulation anomalies. J. Atmos. Sci., 47, 1100–1116.Google Scholar
  198. -, and-, 1993: Synoptic behavior of baroclinic eddies during the blocking onset. Mon. Wea. Rev., 121, 1892–1903.Google Scholar
  199. -, M. Nakamura, and J. L. Anderson, 1997: The role of high-and low-frequency dynamics in blocking formation. Mon. Wea. Rev., 125, 2074–2093.Google Scholar
  200. -, T. Izumi, and T. Sampe, 2002: Interanual and decadal modulations recently observed in the Pacific storm track activity and East Asian winter monsoon. J. Climate, 15, 1855–1874.Google Scholar
  201. Nakazawa, T., 1988: Tropical super clusters within intraseasonal variations over the western Pacific. J. Meteor. Soc. Japan, 66, 823–839.Google Scholar
  202. Namias, J., 1947: Physical nature of some fluctuations in the speed of the zonal circulation. J. Meteor., 4, 125–133.Google Scholar
  203. -, 1950: The index cycle and its role in the general circulation. J. Meteor., 7, 130–139.Google Scholar
  204. -, and P. F. Clapp, 1944: Studies of the motion and development of long waves in the westerlies. J. Meteor., 1, 57–77.Google Scholar
  205. National Research Council, 1996: Learning to Predict Climate Variations Associated with El Niño and the Southern Oscillation: Accomplishments and Legacies of the TOGA Program. National Academy Press, 171 pp.Google Scholar
  206. Neilley, P. P., 1990: Interaction between synoptic-scale eddies and the large-scale flow during the life cycles of persistent flow anomalies. Ph.D. disseration, Massachusetts Institute of Technology, 272 pp. [Available from Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institue of Technology, Cambridge, MA 02139.]Google Scholar
  207. Newell, R. E., N. E. Newell, Y. Zhu, and C. Scott, 1992: Tropospheric rivers—A pilot study. Geophys. Res. Lett., 19, 2401–2404.Google Scholar
  208. Newman, M., and P. D. Sardeshmukh, 1998: The impact of the annual cycle on the North Pacific-North American response to remote low-frequency forcing. J. Atmos. Sci., 55, 1336–1353.Google Scholar
  209. -,-, C. R. Winkler, and J. S. Whitaker, 2003: A study of subseasonal predictability. Mon. Wea. Rev., 131, 1715–1732.Google Scholar
  210. Nitsche, G., J. M. Wallace, and C. Kooperberg, 1994: Is there evidence of multiple equilibria in planetary wave amplitude statistics. J. Atmos. Sci., 51, 314–322.Google Scholar
  211. Opsteegh, J. D., and H. M. Van Den Dool, 1980: Seasonal differences in the stationary response of a linearized primitive equation model: Prospects for long-range weather forecasting? J. Atmos. Sci., 37, 2169–2185.Google Scholar
  212. Orlanski, I., 2005: A new look at the Pacific storm track variability: Sensitivity to tropical SSTs and to upstream seeding. J. Atmos. Sci., 62, 1367–1390.Google Scholar
  213. Owens, B. F., and C. W. Landsea, 2003: Assessing the skill of operational Atlantic seasonal tropical cyclone forecasts. Wea. Forecasting, 18, 45–54.Google Scholar
  214. Palmen, E., and C. W. Newton, 1969: Atmospheric Circulation Systems. Academic Press, 603 pp.Google Scholar
  215. Palmer, T. N., 1998: Nonlinear dynamics and climate change: Rossby’s legacy. Bull. Amer. Meteor. Soc., 79, 1411–1423.Google Scholar
  216. -, 1999: A nonlinear dynamical perspective on climate prediction. J. Climate, 12, 575–591.Google Scholar
  217. -, and D. A. Mansfield, 1984: Response of two atmospheric general circulation models to sea-surface temperatures in the tropical East and West Pacific. Nature, 310, 483–485.Google Scholar
  218. -, F. J. Doblas-Reyes, R. Hagedorn, and A. Weisheimer, 2005a: Probabilistic prediction of climate using multi-model ensembles: From basics to applications. Philos. Trans. Roy. Soc., 360, 1991–1998.Google Scholar
  219. -, G. J. Shutts, R. Hagedorn, F. J. Doblas-Reyes, T. Jung, and M. Leutbecher, 2005b: Representing model uncertainty in weather and climate prediction. Annu. Rev. Earth Planet. Sci., 33, 163–193.Google Scholar
  220. Pedlosky, J., 1979: Geophysical Fluid Dynamics. Springer-Verlag, 624 pp.Google Scholar
  221. Pelly, J. L., and B. J. Hoskins, 2003: A new perspective on blocking. J. Atmos. Sci., 60, 743–755.Google Scholar
  222. Penland, C., and T. Magorian, 1993: Prediction of Niño-3 sea surface temperatures using linear inverse modeling. J. Climate, 6, 1067–1076.Google Scholar
  223. -, and P. D. Sardeshmukh, 1995: The optimal growth of tropical sea surface temperature anomalies. J. Climate, 8, 1999–2024.Google Scholar
  224. -, and L. Matrosova, 1998: Prediction of tropical Atlantic sea surface temperatures using linear inverse modeling. J. Climate, 11, 483–496.Google Scholar
  225. Persson, P. O. G., P. J. Neiman, B. Walter, J. W. Bao, and F. M. Ralph, 2005: Contributions from California coastal-zone surface fluxes to heavy coastal precipitation: A CALJET case study during the strong El Niño of 1998. Mon. Wea. Rev., 133, 1175–1198.Google Scholar
  226. Petterssen, S., 1955: A general survey of some factors influencing development at sea level. J. Meteor., 12, 36–42.Google Scholar
  227. -, 1956: Weather Forecasting and Analysis. Vol. 1, McGraw-Hill, 428 pp.Google Scholar
  228. Philander, S. G., 1990: El Niño, La Niña, and the Southern Oscillation. Academic Press, 293 pp.Google Scholar
  229. Piani, C., D. J. Frame, D. A. Stainforth, and M. R. Allen, 2005: Constraints on climate change from a multi-thousand member ensemble of simulations. Geophys. Res. Lett., 32, L23825, doi: 10.1029/2005GL024452.Google Scholar
  230. Platzman, G. W., 1968: The Rossby wave. Quart. J. Roy. Meteor. Soc., 94, 225–248.Google Scholar
  231. Plumb, R. A., 1985: On the three-dimensional propagation of stationary waves. J. Atmos. Sci., 42, 217–229.Google Scholar
  232. -, 1986: Three-dimensional propagation of transient quasi-geostrophic eddies and its relationship with the eddy forcing of the time-mean flow. J. Atmos. Sci., 43, 1657–1678.Google Scholar
  233. Ralph, F. M., P. J. Neiman, D. E. Kingsmill, P. O. G. Persson, A. B. White, E. T. Strem, E. D. Andrews, and R. C. Antweiler, 2003: The impact of a prominent rain shadow on flooding in California’s Santa Cruz Mountains: A CALJET case study and sensitivity to the ENSO cycle. J. Hydrometeor., 4, 1243–1264.Google Scholar
  234. -,-, and G. A. Wick, 2004: Satellite and CALJET aircraft observations of atmospheric rivers over the eastern North Pacific Ocean during the winter of 1997/98. Mon. Wea. Rev., 132, 1721–1745.Google Scholar
  235. -,-, and R. Rotunno, 2005: Dropsonde observations in lowlevel jets over the northeastern Pacific Ocean from CALJET-1998 and PACJET-2001: Mean vertical profile and atmospheric river characteristics. Mon. Wea. Rev., 133, 889–910.Google Scholar
  236. Rasmusson, E. M., and J. M. Wallace, 1983: Meteorological aspects of the El Niño-Southern Oscillation. Science, 222, 1195–1202.Google Scholar
  237. Reinhold, B. B., and R. T. Pierrehumbert, 1982: Dynamics of weather regimes: Quasi-stationary waves and blocking. Mon. Wea. Rev., 110, 1105–1145.Google Scholar
  238. Renwick, J. A., and J. M. Wallace, 1996: Relationships between North Pacific wintertime blocking, El Niño, and the PNA pattern. Mon. Wea. Rev., 124, 2071–2076.Google Scholar
  239. Rex, D., 1950a: Blocking action in the middle troposphere and its effects on regional climate. I. An aerological study of blocking. Tellus, 2, 196–211.Google Scholar
  240. -, 1950b: Blocking action in the middle troposphere and its effects on regional climate. II. The climatology of blocking action. Tellus, 2, 275–301.Google Scholar
  241. Rogers, J. C., 1981: Spatial variability of seasonal sea-level pressure and 500 mb height anomalies. Mon. Wea. Rev., 109, 2093–2106.Google Scholar
  242. Ropelewski, C. F., and M. S. Halpert, 1987: Global and regional scale precipitation patterns associated with the El Niño-Southern Oscillation. Mon. Wea. Rev., 115, 1606–1626.Google Scholar
  243. -, and-, 1989: Precipitation patterns associated with the high index phase of the Southern Oscillation. J. Climate, 2, 268–284.Google Scholar
  244. -,-, and X. Wang, 1992: Observed tropospheric biennial variability and its relationship to the Southern Oscillation. J. Climate, 5, 594–614.Google Scholar
  245. Rossby, C. G., and Coauthors, 1939: Relations between variations in the intensity of the zonal circulation of the atmosphere and the displacements of the semi-permanent centers of actions. Tellus, 2, 275–301.Google Scholar
  246. Salby, M. L., R. R. Garcia, and H. H. Hendon, 1994: Planetary-scale circulations in the presence of climatological and wave-induced heating. J. Atmos. Sci., 51, 2344–2367.Google Scholar
  247. Sanders, F., 1973: Skill in forecasting daily temperature and precipitation—Some experimental results. Bull. Amer. Meteor. Soc., 54, 1171–1179.Google Scholar
  248. -, 1979: Trends in skill of daily forecasts of temperature and precipitation, 1966–78. Bull. Amer. Meteor. Soc., 60, 763–769.Google Scholar
  249. -, 1988: Life history of mobile troughs in the upper westerlies. Mon. Wea. Rev., 116, 2629–2648.Google Scholar
  250. -, and J. R. Gyakum, 1980: Synoptic-dynamic climatology of the “bomb.” Mon. Wea. Rev., 108, 1589–1606.Google Scholar
  251. Sardeshmukh, P. D., 1993: The baroclinic chi problem and its application to the diagnosis of atmospheric heating rates. J. Atmos. Sci., 50, 1099–1112.Google Scholar
  252. -, and B. J. Hoskins, 1988: The generation of global rotational flow by steady idealized tropical divergence. J. Atmos. Sci., 45, 1228–1251.Google Scholar
  253. -, M. Newman, and M. D. Borges, 1997: Free barotropic Rossby wave dynamics of the wintertime low-frequency flow. J. Atmos. Sci., 54, 5–23.Google Scholar
  254. -, G. P. Compo, and C. Penland, 2000: Changes of probability associated with El Niño. J. Climate, 13, 4268–4286.Google Scholar
  255. Sawyer, J. S., 1970: Observational characteristics of atmospheric fluctuations with a time scale of a month. Quart. J. Roy. Meteor. Soc., 96, 610–625.Google Scholar
  256. Schonher, T., and S. E. Nicholson, 1989: The relationship between California rainfall and ENSO events. J. Climate, 2, 1258–1269.Google Scholar
  257. Schubert, S. D., 1986: The structure, energetics, and evolution of the dominant frequency-dependent three-dimensional atmospheric modes. J. Atmos. Sci., 43, 1210–1237.Google Scholar
  258. -, Y. Chang, M. Suarez, and P. Pegion, 2005: On the relationship between ENSO and extreme weather over the contiguous U. S. U.S. CLIVAR Variations, 3, 1–4.Google Scholar
  259. Shapiro, M. A., H. Wernli, N. A. Bond, and R. Langland, 2001: The influence of the 1997–99 El Niño-Southern Oscillation on extratropical baroclinic life cycles over the eastern North Pacific. Quart. J. Roy. Meteor. Soc., 127, 331–342.Google Scholar
  260. Shutts, G. J., 1986: A case study of eddy forcing during an Atlantic blocking episode. Advances in Geophysics, Vol. 29, Academic Press, 135–162.Google Scholar
  261. Simmons, A. J., 1982: The forcing of stationary wave motion by tropical diabatic heating. Quart. J. Roy. Meteor. Soc., 108, 503–534.Google Scholar
  262. -, and A. Hollingsworth, 2002: Some aspects of the improvement in skill of numerical weather prediction. Quart. J. Roy. Meteor. Soc., 128, 647–677.Google Scholar
  263. -, J. M. Wallace, and G. W. Branstator, 1983: Barotropic wave-propagation and instability, and atmospheric teleconnection patterns. J. Atmos. Sci., 40, 1363–1392.Google Scholar
  264. Stainforth, D., J. Kettleborough, M. Allen, M. Collins, A. Heaps, and J. Murphy, 2002: Distributed computing for public-interest climate modeling research. Comput. Sci. Eng., 4, 82–89.Google Scholar
  265. Straus, D. M., and J. Shukla, 2002: Does ENSO force the PNA? J. Climate, 15, 2340–2358.Google Scholar
  266. Sumner, E. J., 1954: A study of blocking in the Atlantic-European sector of the Northern Hemisphere. Quart. J. Roy. Meteor. Soc., 80, 402–416.Google Scholar
  267. Thompson, D. W. J., and J. M. Wallace, 1998: The Arctic Oscillation signature in the wintertime geopotential height and temperature fields. Geophys. Res. Lett., 25, 1297–1300.Google Scholar
  268. -, and-, 2000: Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate, 13, 1000–1016.Google Scholar
  269. -, and-, 2001: Regional climate impacts of the Northern Hemisphere annular mode. Science, 293, 85–89.Google Scholar
  270. -, M. P. Baldwin, and J. M. Wallace, 2002: Stratospheric connection to Northern Hemisphere wintertime weather: Implications for prediction. J. Climate, 15, 1421–1428.Google Scholar
  271. Thorncroft, C. D., B. J. Hoskins, and M. F. McIntyre, 1993: Two paradigms of baroclinic-wave life-cycle behavior. Quart. J. Roy. Meteor. Soc., 119, 17–55.Google Scholar
  272. THORPEX, 2004: A global atmospheric research programme for the beginning of the 21st century. WMO Bulletin, Vol. 54, No. 3.Google Scholar
  273. Tracton, M. S., 1990: Predictability and its relationship to scale interaction processes in blocking. Mon. Wea. Rev., 118, 1666–1695.Google Scholar
  274. -, and E. Kalnay, 1993: Operational ensemble prediction at the National Meteorological Center—Practical aspects. Wea. Forecasting, 8, 379–398.Google Scholar
  275. Trenberth, K. E., 1976: Fluctuations and trends in indexes of Southern Hemispheric circulation. Quart. J. Roy. Meteor. Soc., 102, 65–75.Google Scholar
  276. -, 1986: An assessment of the impact of transient eddies on the zonal flow during a blocking episode using localized Eliassen-Palm flux diagnostics. J. Atmos. Sci., 43, 2070–2087.Google Scholar
  277. -, 1997a: Short-term climate variations: Recent accomplishments and issues for future progress. Bull. Amer. Meteor. Soc., 78, 1081–1096.Google Scholar
  278. -, 1997b: The definition of El Niño. Bull. Amer. Meteor. Soc., 78, 2771–2777.Google Scholar
  279. -, and D. J. Shea, 1987: On the evolution of the Southern Oscillation. Mon. Wea. Rev., 115, 3078–3096.Google Scholar
  280. -, and D. P. Stepaniak, 2001: Indices of El Niño evolution. J. Climate, 14, 1697–1701.Google Scholar
  281. -, G. W. Branstator, D. Karoly, A. Kumar, N. C. Lau, and C. Ropelewski, 1998: Progress during TOGA in understanding and modeling global teleconnections associated with tropical sea surface temperatures. J. Geophys. Res., 103C, 14 291–14 324.Google Scholar
  282. Tung, K. K., and R. S. Lindzen, 1979a: A theory of stationary long waves. Part I: A simple theory of blocking. Mon. Wea. Rev., 107, 714–734.Google Scholar
  283. -, and-, 1979b: A theory of stationary long waves. Part II: Resonant Rossby waves in the presence of realistic vertical shears. Mon. Wea. Rev., 107, 735–750.Google Scholar
  284. van Loon, H., and J. C. Rogers, 1978: the seesaw in winter temperatures between Greenland and Northern Europe. Part I: General description. Mon. Wea. Rev., 106, 296–310.Google Scholar
  285. Vitart, F., and T. N. Stockdale, 2001: Seasonal forecasting of tropical storms using coupled GCM integrations. Mon. Wea. Rev., 129, 2521–2537.Google Scholar
  286. Walker, G. T., 1924: Correlation in seasonal variations of weather. IX. A further study of world weather. Memo. Indian Meteor. Dept., 24, 275–332.Google Scholar
  287. -, and E. W. Bliss, 1932: World Weather V. Memo. Roy. Meteor. Soc., 4, 53–84.Google Scholar
  288. Waliser, D. E., C. Jones, J. K. E. Schemm, and N. E. Graham, 1999: A statistical extended-range tropical forecast model based on the slow evolution of the Madden-Julian oscillation. J. Climate, 12, 1918–1939.Google Scholar
  289. -, K.M. Lau, W. Stern, and C. Jones, 2003: Potential predictability of the Madden-Julian oscillation. Bull. Amer. Meteor. Soc., 84, 33–50.Google Scholar
  290. Wallace, J. M., and D. S. Gutzler, 1981: Teleconnections in the geopotential height field during the Northern Hemisphere winter. Mon. Wea. Rev., 109, 784–812.Google Scholar
  291. -, and N. C. Lau, 1985: On the role of barotropic energy conversions in the general circulation. Advances in Geophysics, Vol. 28, Academic Press, 33–74.Google Scholar
  292. -, and D. W. J. Thompson, 2002a: Annular modes and climate prediction. Phys. Today, 55, 28–33.Google Scholar
  293. -, and-, 2002b: The Pacific center of action of the Northern Hemisphere annular mode: Real or artifact? J. Climate, 15, 1987–1991.Google Scholar
  294. -, G. H. Lim, and M. L. Blackmon, 1988: Relationship between cyclone tracks, anticyclone tracks, and baroclinic wave-guides. J. Atmos. Sci., 45, 439–462.Google Scholar
  295. -, E. M. Rasmusson, T. P. Mitchell, V. E. Kousky, E. S. Sarachik, and H. von Storch, 1998: The structure and evolution of ENSOrelated climate variability in the tropical Pacific: Lessons from TOGA. J. Geophys. Res., 103 (C7), 14 241–14 259.Google Scholar
  296. Wang, B., and T. Li, 1994: Convective interaction with boundarylayer dynamics in the development of a tropical intraseasonal system. J. Atmos. Sci., 51, 1386–1400.Google Scholar
  297. Webster, P. J., 1981: Mechanisms determining the atmospheric response to sea surface temperature anomalies. J. Atmos. Sci., 38, 554–571.Google Scholar
  298. -, and J. R. Holton, 1982: Cross-equatorial response to middlelatitude forcing in a zonally varying basic state. J. Atmos. Sci., 39, 722–733.Google Scholar
  299. -, and C. Hoyos, 2004: Prediction of monsoon rainfall and river discharge on 15–30-day time scales. Bull. Amer. Meteor. Soc., 85, 1745–1765.Google Scholar
  300. Weickmann, K., 1983: Intraseasonal circulation and outgoing longwave radiation modes during Northern Hemisphere winter. Mon. Wea. Rev., 111, 1838–1858.Google Scholar
  301. -, 2003: Mountains, the global frictional torque, and the circulation over the Pacific-North American region. Mon. Wea. Rev., 131, 2608–2622.Google Scholar
  302. -, and P. D. Sardeshmukh, 1994: The atmospheric angular momentum cycle associated with a Madden-Julian oscillation. J. Atmos. Sci., 51, 3194–3208.Google Scholar
  303. -, and E. Berry, 2007: A synoptic-dynamic model of subseasonal atmospheric variability. Mon. Wea. Rev., 135, 449–474.Google Scholar
  304. -, G. R. Lussky, and J. E. Kutzbach, 1985: Intraseasonal (30-60 day) fluctuations of outgoing longwave radiation and 250 mb streamfunction during northern winter. Mon. Wea. Rev., 113, 941–961.Google Scholar
  305. -, G. N. Kiladis, and P. D. Sardeshmukh, 1997: The dynamics of intraseasonal atmospheric angular momentum oscillations. J. Atmos. Sci., 54, 1445–1461.Google Scholar
  306. Wheeler, M., and G. N. Kiladis, 1999: Convectively coupled equatorial waves: Analysis of clouds and temperature in the wavenumber-frequency domain. J. Atmos. Sci., 56, 374–399.Google Scholar
  307. -, and K. M. Weickmann, 2001: Real-time monitoring and prediction of modes of coherent synoptic to intraseasonal tropical variability. Mon. Wea. Rev., 129, 2677–2694.Google Scholar
  308. -, G. N. Kiladis, and P. J. Webster, 2000: Large-scale dynamical fields associated with convectively coupled equatorial waves. J. Atmos. Sci., 57, 613–640.Google Scholar
  309. Whitaker, J. S., and R. M. Dole, 1995: Organization of storm tracks in zonally varying flows. J. Atmos. Sci., 52, 1178–1191.Google Scholar
  310. -, and P. D. Sardeshmukh, 1998: A linear theory of extratropical synoptic eddy statistics. J. Atmos. Sci., 55, 237–258.Google Scholar
  311. -, and K. M. Weickmann, 2001: Subseasonal variations of tropical convection and week-2 prediction of wintertime western North American rainfall. J. Climate, 14, 3279–3288.Google Scholar
  312. Wilks, D. S., 2006: Statistical Methods in the Atmospheric Sciences. 2d ed. Academic Press, 627 pp.Google Scholar
  313. Willett, H. C., 1949: Long-period fluctuations of the general circulation of the atmosphere. J. Meteor., 6, 34–50.Google Scholar
  314. Winkler, C. R., M. Newman, and P. D. Sardeshmukh, 2001: A linear model of wintertime low-frequency variability. Part I: Formulation and forecast skill. J. Climate, 14, 4474–4494.Google Scholar
  315. Wyrtki, K., 1975: El Niño—The dynamic response of the equatorial Pacific Ocean to atmospheric forcing. J. Phys. Oceanogr., 5, 572–584.Google Scholar
  316. Zebiak, S. E., and M. A. Cane, 1987: A model El Niño-Southern Oscillation. Mon. Wea. Rev., 115, 2262–2278.Google Scholar
  317. Zhang, C., 2005: Madden-Julian oscillation. Rev. Geophys., 43, RG2003, doi: 10.1029/2004RG000158.Google Scholar
  318. -, and J. Gottschalck, 2002: SST anomalies of ENSO and the Madden-Julian Oscillation in the Equatorial Pacific. J. Climate, 15, 2429–2445.Google Scholar
  319. Zhang, Y., and I. M. Held, 1999: A linear stochastic model of a GCM’s midlatitude storm tracks. J. Atmos. Sci., 56, 3416–3435.Google Scholar
  320. Zhu, Y., and R. E. Newell, 1998: A proposed algorithm for moisture fluxes from atmospheric rivers. Mon. Wea. Rev., 126, 725–735.Google Scholar
  321. -,-, and W. G. Read, 2000: Factors controlling upper-troposphere water vapor. J. Climate, 13, 836–848.Google Scholar

Copyright information

© American Meteorological Society 2008

Authors and Affiliations

  1. 1.NOAA/Earth System Research LaboratoryBoulderUSA

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