var bloomfield76 = "Bloomfield, P., <i>Fourier Decomposition of Time Series: An Introduction</i>, 258 pp., John Wiley, New York, 1976.";
var cane84 = "Cane, M. A., Modeling sea level during El Niņo, <i>J. Phys. Oceanogr., 14</i>, 1864-1874, 1984.";
var chelliah_arkin92 = "Chelliah, M., and P. Arkin, Large-scale interannual variability of monthly outgoing longwave radiation anomalies over the global tropics, <i>J. Clim., 5</i>, 371-389, 1992.";
var chelton_davis82 = "Chelton, D. B., and R. E. Davis, Monthly mean sea level variability along the west coast of North America, <i>J. Phys. Oceanogr., 12</i>, 757-784, 1982.";
var clarke83 = "Clarke, A. J., The reflection of equatorial waves from oceanic boundaries, <i>J. Phys. Oceanogr., 13</i>, 1193-1207, 1983. ";
var dupenhoat_etal92 = "duPenhoat, Y., T. Delcroix, and J. Picaut, Interpretation of Kelvin/Rossby waves in the equatorial Pacific from model-GEOSAT data intercomparison during the 1986-1987 El Niņo, <i>Oceanol. Acta, 15</i>, 545-554, 1992. ";
var enfield87 = "Enfield, D. B., The intraseasonal oscillation in eastern Pacific sea levels: How is it forced? <i>J. Phys. Oceanogr., 17</i>, 1860-1876, 1987. ";
var firing_etal83 = "Firing, E., R. Lukas, J. Sadler, and K. Wyrtki, Equatorial undercurrent disappears during 1982-83 El Niņo, <i>Science, 222</i>, 1121-1123, 1983. ";
var gent85 = "Gent, P. R., The annual cycle in the central equatorial Pacific Ocean, <i>J. Mar. Res., 43</i>, 743-759, 1985. ";
var gill_king85 = "Gill, A. E., and B. A. King, The effect of a shoaling thermocline on equatorially-trapped Kelvin waves, Dynamical Climatology Technical Note 27, 28 pp., Meteorological Office, Bracknell, Berkshire, UK, 1985. ";
var gruber_krueger84 = "Gruber, A., and A. F. Krueger, The status of the NOAA outgoing longwave radiation data set, <i>Bull. Amer. Meteorol. Soc., 65</i>, 958-962, 1984. ";
var halpern87 = "Halpern, D., Observations of annual and El Niņo thermal and flow variations at 0°, 110°W and 0°, 95°W during 1980-1985, <i>J. Geophys. Res., 92</i>, 8197-8212, 1987. ";
var hayes82 = "Hayes, S. P., A comparison of geostrophic and measured velocities in the Equatorial Undercurrent, <i>J. Mar. Res., 40</i>, Supplement, 219-229, 1982. ";
var hayes_mcphaden92 = "Hayes, S. P., and M. J. McPhaden, Temporal sampling requirements for low frequency temperature variability in the eastern equatorial Pacific Ocean, <i>NOAA Tech. Memo., ERL-PMEL-96</i>, 1992. ";
var hayes_etal85 = "Hayes, S. P., P. Ripa, and L. J. Mangum, On resolving vertical modes with observational data, <i>J. Geophys. Res., 90</i>, 7227-7234, 1985. ";
var hayes_etal91a = "Hayes, S. P., P. Chang, and M. J. McPhaden, Variability of the sea surface temperature in the eastern equatorial Pacific during 1986-88, <i>J. Geophys. Res., 96</i>, 10,553-10,566, 1991a. ";
var hayes_etal91b = "Hayes, S. P., L. J. Mangum, J. Picaut, A. Sumi, and K. Takeuchi, TOGA/TAO: A moored array for real-time measurements in the tropical Pacific Ocean, <i>Bull. Am. Meteorol. Soc., 72</i>, 339-347, 1991b. ";
var hendon_salby95 = "Hendon, H. H., and M. L. Salby, The life cycle of the Madden-Julian Oscillation<i>, J. Atmos. Sci., 51</i>, 2225-2237, 1995. ";
var johnson_mcphaden93a = "Johnson, E. S., and M. J. McPhaden, Structure of intraseasonal Kelvin waves in the equatorial Pacific Ocean,<i> J. Phys. Oceanogr., 23</i>, 608-625, 1993a. ";
var johnson_mcphaden93b = "Johnson, E. S., and M. J. McPhaden, Effects of a three-dimensional mean flow on intraseasonal Kelvin waves in the equatorial Pacific Ocean, <i>J. Geophys. Res., 98</i>, 10,185-10,194, 1993b. ";
var kessler91 = "Kessler, W. S., Can reflected extra-equatorial Rossby waves drive ENSO?, <i>J. Phys. Oceanogr., 21</i>, 444-452, 1991. ";
var kessler_mccreary93 = "Kessler, W. S., and J. P. McCreary, The annual wind-driven Rossby wave in the sub-thermocline equatorial Pacific, <i>J. Phys. Oceanogr., 23</i>, 1192-1207, 1993. ";
var kessler_mcphaden95a = "Kessler, W. S., and M. J. McPhaden, Oceanic equatorial waves and the dynamics of the 1991-93 El Niņo, <i>J. Clim.,</i> in press, 1995a. ";
var kessler_mcphaden95b = "Kessler, W. S., and M. J. McPhaden, The 1991-93 El Niņo in the central Pacific, <i>Deep Sea Res.</i>, in press, 1995b. ";
var knutson_weickmann87 = "Knutson, T. R., and K. M. Weickmann, 30-60 day atmospheric oscillations: Composite life cycles of convection and circulation anomalies, <i>Mon. Weather Rev., 115</i>, 1407-1436, 1987. ";
var knutson_etal86 = "Knutson, T. R., K. M. Weickmann, and J. E. Kutzbach, Global-scale intraseasonal oscillation of outgoing longwave radiation during northern hemisphere summer, <i>Mon. Weather Rev., 114</i>, 605-623, 1986. ";
var latif_etal88 = "Latif, M., J. Biercamp, and H. von Storch, The response of a coupled ocean-atmosphere general circulation model to wind bursts, <i>J. Atmos. Sci., 45</i>, 964-979, 1988. ";
var lau_chan85 = "Lau, K. M., and P. H. Chan, Aspects of the 40-50 day oscillation during northern winter as inferred from outgoing longwave radiation, <i>Mon. Weather Rev., 113</i>, 1889-1909, 1985. ";
var lau_chan86 = "Lau, K. M., and P. H. Chan, Aspects of the 40-50 day oscillation during northern summer as inferred from outgoing longwave radiation, <i>Mon. Weather Rev., 114</i>, 1354-1367, 1986. ";
var lau_shen88 = "Lau, K. M., and S. Shen, On the dynamics of intraseasonal oscillations and ENSO, <i>J. Atmos. Sci., 45</i>, 1781-1797, 1988. ";
var long_chang90 = "Long, B., and P. Chang, Propagation of an equatorial Kelvin wave in a varying thermocline, <i>J. Phys. Oceanogr., 20</i>, 1826-1841, 1990. ";
var lukas_firing85 = "Lukas, R., and E. Firing, The annual Rossby wave in the central equatorial Pacific ocean, <i>J. Phys. Oceanogr., 11</i>, 55-67, 1985. ";
var madden_julian71 = "Madden, R. A., and P. R. Julian, Detection of a 40-50 day oscillation in the zonal wind in the tropical Pacific, <i>J. Atmos. Sci., 28</i>, 702-708, 1971. ";
var madden_julian72 = "Madden, R. A., and P. R. Julian, Description of global-scale circulation cells in the tropics with a 40-50 day period, <i>J. Atmos. Sci., 29</i>, 1109-1123, 1972. ";
var mccalpin87 = "McCalpin, J. D., A note on the reflection of low-frequency equatorial Rossby waves from realistic western boundaries, <i>J. Phys. Oceanogr., 17</i>, 1944-1977, 1987. ";
var mccreary_lukas86 = "McCreary, J. P., and R. Lukas, The response of the equatorial ocean to a moving wind field, <i>J. Geophys. Res., 91</i>, 11,691-11,705, 1986. ";
var mcphaden82 = "McPhaden, M. J., Variability in the central equatorial Indian Ocean, I, Ocean dynamics, <i>J. Mar. Res., 40</i>, 157-176, 1982. ";
var mcphaden93 = "McPhaden, M. J., TOGA-TAO and the 1991-93 El Niņo-Southern Oscillation event, <i>Oceanography, 6</i>, 36-44, 1993. ";
var mcphaden_hayes90 = "McPhaden, M. J., and S. P. Hayes, Variability in the eastern equatorial Pacific Ocean during 1986-88, <i>J. Geophys. Res., 95</i>, 13,195-13,208, 1990. ";
var mcphaden_etal90 = "McPhaden, M. J., H. B. Milburn, A. I. Nakamura, and A. J. Shepherd, PROTEUS--Profile telemetry of upper ocean currents, in <i>Proceedings of MTS \'90 Conference</i>, pp. 353-357, Marine Technology Society, Washington, D.C., 1990. ";
var mcphaden_mccarty92 = "McPhaden, M. J., and M. J. McCarty, Mean seasonal cycles and interannual variations at 0°, 110°W and 0°, 140°W during 1980-1991, <i>NOAA Data Rep., ERL PMEL-95</i>, 118 pp., 1992.";
var mcphaden_taft88 = "McPhaden, M. J., and B. A. Taft, Dynamics of seasonal and intraseasonal variability in the eastern equatorial Pacific, <i>J. Phys. Oceanogr., 18</i>, 1713-1732, 1988. ";
var meyers79 = "Meyers, G., Annual variation in the slope of the 14°C isotherm along the equator in the Pacific Ocean, <i>J. Phys. Oceanogr., 9</i>, 885-891, 1979. ";
var nakazawa88 = "Nakazawa, T., Tropical cloud clusters within the intraseasonal variations over the western Pacific, <i>J. Meteorol. Soc. Jpn., 66</i>, 823-839, 1988. ";
var philander_pacanowski81 = "Philander, S. G. H., and R. C. Pacanowski, Response of equatorial oceans to periodic forcing, <i>J. Geophys. Res., 86</i>, 1903-1916, 1981. ";
var picaut_delcroix95 = "Picaut, J., and T. Delcroix, Equatorial wave sequence associated with warm pool displacements during the 1986-1989 El Niņo-La Niņa, <i>J. Geophys. Res.</i>, in press, 1995. ";
var reynolds_smith94 = "Reynolds, R. W., and T. M. Smith, Improved sea surface temperature analyses using optimum interpolation, <i>J. Clim., 5</i>, 929-948, 1994. ";
var rui_wang90 = "Rui, H., and B. Wang, Development characteristics and dynamic structure of tropical intraseasonal convection anomalies, <i>J. Atmos. Sci., 47</i>, 357-379, 1990. ";
var spillane_etal87 = "Spillane, M. C., D. B. Enfield, and J. S. Allen, Intraseasonal oscillations in sea level along the west coast of the Americas, <i>J. Phys. Oceanogr., 17</i>, 313-325, 1987. ";
var sui_lau89 = "Sui, C.-H., and K. M. Lau, Origin of low-frequency (intraseasonal) oscillations in the tropical atmosphere, II, Effect of an improved treatment of moist processes, <i>J. Atmos. Sci., 46</i>, 37-56, 1989. ";
var tang_weisberg84 = "Tang, T. Y., and R. H. Weisberg, On the equatorial Pacific response to the 1982/1983 El Niņo-Southern Oscillation event, <i>J. Mar. Res., 42</i>, 809-829, 1984. ";
var wallace_dickinson72 = "Wallace, J. M., and R. E. Dickinson, Empirical orthogonal representation of time series in the frequency domain, I, Theoretical considerations, <i>J. Appl. Meteorol., 11</i>, 887-892, 1972. ";
var waliser_etal93 = "Waliser, D. E., N. E. Graham, and C. Gautier, Comparison of highly reflective cloud and outgoing longwave radiation datasets for use in estimating tropical deep convection, <i>J. Clim., 6</i>, 331-353, 1993. ";
var webster_lukas92 = "Webster, P. J., and R. Lukas, TOGA-COARE: The coupled ocean-atmosphere response experiment, <i>Bull. Am. Meteorol. Soc., 73</i>, 1377-1416, 1992. ";
var weickmann_khalsa90 = "Weickmann, K. M., and S. J. S. Khalsa, The shift of convection from the Indian Ocean to the western Pacific Ocean during a 30-60 day oscillation, <i>Mon. Weather Rev., 118</i>, 964-978, 1990. ";
var weickmann_etal85 = "Weickmann, K. M., G. R. Lussky, and J. E. Kutzbach, Intraseasonal (30-60 day) fluctuations of outgoing longwave radiation and 250 mb streamfunction during northern winter, <i>Mon. Weather Rev., 113</i>, 941-961, 1985. ";
var weisberg_tang83 = "Weisberg, R. H., and T. Y. Tang, Equatorial ocean response to growing and moving wind systems with application to the Atlantic, <i>J. Mar. Res., 41</i>, 461-486, 1983. ";
var zebiak89 = "Zebiak, S., On the 30-60 day oscillation and the prediction of El Niņo,<i> J. Clim., 2</i>, 1381-1387, 1989. ";
var zhu_wang93 = "Zhu, B., and B. Wang, The 30-60 day convection seesaw between the tropical Indian and western Pacific Oceans, <i>J. Atmos. Sci., 50</i>, 184-199, 1993. ";