var barnett91 = "Barnett, T. P., M. Latif, E. Kirk, and E. Roeckner, 1991: On ENSO physics. <i>J. Climate</i>, <b>4</b>, 487-515.";
var battisti89 = "Battisti, D. S., and A. C. Hirst, 1989: Interannual variability in a tropical atmosphere-ocean model: Influence of the basic state, ocean geometry, and nonlinearity. <i>J. Atmos. Sci.</i>, <b>46</b>, 1687-1712.";
var boulanger99 = "Boulanger, J.-P., and C. Menkes, 1999: Long equatorial wave reflection in the Pacific Ocean from TOPEX/POSEIDON data during the 1992-1998 period. <i>Climate Dyn.</i>, <b>15</b>, 205-226.";
var cane85 = "Cane, M. A., and S. E. Zebiak, 1985: A theory for El Ni&#241;o and the Southern Oscillation. <i>Science</i>, <b>228</b>, 1085-1087.";
var cane86 = "Cane, M. A., S. E. Zebiak, and S. C. Dolan, 1986: Experimental forecasts of El Ni&#241;o. <i>Nature</i>, <b>321</b>, 827-832.";
var emery97 = "Emery, W. J., and R. E. Thomson, 1997. <i>Data Analysis Methods in Physical Oceanography</i>. Pergamon Press, 634 pp.";
var ji97 = "Ji, M., and A. Leetmaa, 1997: Impact of data assimilation on ocean initialization and El Ni&#241;o prediction. <i>Mon. Wea. Rev.</i>, <b>125</b>, 742- 753.";
var jin97a = "Jin, F.-F., 1997a: An equatorial ocean recharge paradigm for ENSO. Part I: Conceptual model. <i>J. Atmos. Sci</i>., <b>54</b>, 811-829.";
var jin97b  = "Jin, F.-F., 1997b: An equatorial ocean recharge paradigm for ENSO. Part II: A stripped-down coupled model. <i>J. Atmos. Sci.</i>, <b>54</b>, 830-847.";
var kessler90 = "Kessler, W. S., 1990: Observations of long Rossby waves in the northern tropical Pacific. <i>J. Geophys. Res.</i>, <b>95</b>, 5183-5217.";
var li94 = "Li, B., and A. J. Clarke, 1994: An examination of some ENSO mechanisms using interannual sea level at the eastern and western equatorial boundaries and the zonally averaged equatorial wind. <i>J. Phys. Oceanogr.</i>, <b>24</b>, 681-690.";
var mantua94 = "Mantua, N. J., and D. S. Battisti, 1994: Evidence for the delayed oscillator mechanism for ENSO: The &quot;observed&quot; oceanic Kelvin mode in the far western Pacific. <i>J. Phys. Oceanogr.</i>, <b>24</b>, 691-699.";
var mcphaden99 = "McPhaden, M. J., 1999: Genesis and evolution of the 1997-1998 El Ni&#241;o. <i>Science</i>, <b>283</b>, 950-954.";
var mcphaden_etal99 = "McPhaden, M. J., and X. Yu, 1999: Equatorial waves and the 1997-98 El Ni&#241;o. <i>Geophys. Res. Lett.</i>, <b>26</b>, 2961-2964.";
var mcphaden98 = "McPhaden, M. J., and Coauthors, 1998: The Tropical Ocean Global Atmosphere (TOGA) observing system: A decade of progress. <i>J. Geophys. Res.</i>, <b>103</b>, 14,169-14,240.";
var meyers91 = "Meyers, G., H. Phillips, N. R. Smith, and J. Sprintall, 1991: Space and time scales for optimum interpolation of temperature&#8212;tropical Pacific Ocean. <i>Progress in Oceanography</i>, Vol. 28, Pergamon, 189-218.";
var philander90 = "Philander, S. G. H., 1990: <i>El Ni&#241;o, La Ni&#241;a, and the Southern Oscillation.</i> Academic Press, 289 pp.";
var picaut97 = "Picaut, J., F. Masia, and Y. du Penhoat, 1997: An advective&#8211;reflective conceptual model for the oscillatory nature of the ENSO. <i>Science</i>, <b>277</b>, 663-666.";
var reynolds94 = "Reynolds, R. W., and T. M. Smith, 1994: Improved global sea surface temperature analyses using optimum interpolation. <i>J. Climate</i>, <b>7</b>, 929-948.";
var reynolds95 = "Reynolds, R. W., and T. M. Smith, 1995: A high resolution global sea surface temperature climatology. <i>J. Climate</i>, <b>8</b>, 1571-1583.";
var schneider94 = "Schneider, E. K., B. Huang, and J. Shukla, 1994: Ocean wave dynamics and El Ni&#241;o. Center for Ocean-Land-Atmosphere Studies, Rep. 1, 46 pp. ";
var schneider95 = "Schneider, E. K., B. Huang, and J. Shukla, 1995: Ocean wave dynamics and El Ni&#241;o. <i>J. Climate</i>, <b>8</b>, 2415-2439.";
var schopf88 = "Schopf, P. S., and M. J. Suarez, 1988: Vacillations in a coupled ocean-atmosphere model. <i>J. Atmos. Sci.</i>, <b>45</b>, 549-566.";
var schopf90 = "Schopf, P. S., and M. J. Suarez, 1990: Ocean wave dynamics and the time scale of ENSO. <i>J. Phys. Oceanogr.</i>, <b>20</b>, 629-645.";
var smith91 = "Smith, N. R., 1991: Objective quality controls and performance diagnostics of an oceanic subsurface thermal analysis scheme. <i>J. Geophys. Res.</i>, <b>96</b>, 3279-3287.";
var smith95a = "Smith, N. R., 1995a: The BMRC ocean thermal analysis system. <i>Aust. Meteor. Mag.</i>, <b>44</b>, 93-110.";
var smith95b = "Smith, N. R., 1995b: An improved system for tropical ocean sub-surface temperature analyses. <i>J. Atmos. Oceanic Technol.</i>, <b>12</b>, 850-870.";
var smith_etal91 = "Smith, N. R., J. E. Blomley, and G. Meyers, 1991: A univariate statistical interpolation scheme for subsurface thermal analyses in the tropical oceans. <i>Progress in Oceanography</i>, Vol. 28, Pergamon, 219-256.";
var springer90 = "Springer, S. R., M. J. McPhaden, and A. J. Busalacchi, 1990: Oceanic heat content variability in the tropical Pacific during the 1982-1983 El Ni&#241;o. <i>J. Geophys. Res.</i>, <b>95</b>, 22,089-22,101.";
var stricherz92 = "Stricherz, J. N., J. J. O\'Brien, and D. M. Legler, 1992: <i>Atlas of Florida State University Tropical Pacific Winds for TOGA 1966-1985.</i> The Florida State University, 275 pp.";
var stricherz97 = "Stricherz, J. N., D. M. Legler, and J. J. O\'Brien, 1997: <i>Pacific Ocean.</i> Vol. 2, <i>TOGA Pseudo-stress Atlas 1985-1994.</i> The Florida State University, 163 pp.";
var suarez88 = "Suarez, M. J., and P. S. Schopf, 1988: A delayed action oscillator for ENSO. <i>J. Atmos. Sci.</i>, <b>45</b>, 3283-3287.";
var trenberth97 = "Trenberth, K. E., 1997: The definition of El Ni&#241;o. <i>Bull. Amer. Meteor. Soc.</i>, <b>78</b>, 2771-2777.";
var wang99 = "Wang, B., R. Wu, and R. Lukas, 1999: Roles of the western north Pacific wind variation in thermocline adjustment and ENSO phase transition. <i>J. Meteor. Soc. Japan</i>, <b>77</b>, 1-16. ";
var wang00 = "Wang, W., and M. J. McPhaden, 2000: The surface-layer heat balance in the equatorial Pacific Ocean, Part II: Interannual variability. <i>J. Phys. Oceanogr.</i>, in press.";
var weisberg97 = "Weisberg, R. H., and C. Wang, 1997: Slow variability in the equatorial west-central Pacific in relation to ENSO. <i>J. Climate</i>, <b>10</b>, 1998-2017.";
var wyrtki75a = "Wyrtki, K., 1975a: El Ni&#241;o&#8212;the dynamic response of the equatorial Pacific ocean to atmospheric forcing. <i>J. Phys. Oceanogr.</i>, <b>5</b>, 572-584.";
var wyrtki75b = "Wyrtki, K., 1975b: Fluctuations in the dynamic topography in the Pacific Ocean. <i>J. Phys. Oceanogr.</i>, <b>5</b>, 450-459.";
var wyrtki85 = "Wyrtki, K., 1985: Water displacements in the Pacific and the genesis of El Ni&#241;o cycles. <i>J. Geophys. Res.</i>, <b>90</b>, 7129-7132.";
var zebiak89 = "Zebiak, S. E., 1989: Oceanic heat content variability and El Ni&#241;o cycles. <i>J. Phys. Oceanogr.</i>, <b>19</b>, 475-486.";
var zebiak87 = "Zebiak, S. E., and M. A. Cane, 1987: A model El Ni&#241;o-Southern Oscillation. <i>Mon. Wea. Rev.</i>, <b>115</b>, 2262-2278.";
