All of the fields displayed as meridional-time sections are fields of gridded 5-Day or monthly means. The same gridding routine is used for all fields.

The time Means at the array locations are gridded to 1 deg in latitude using the following method.
   First, anomalies are computed at the nominal TAO / TRITON array coordinates by subtracting climatological averages from the data means after bilinearly interpolating the climatology field in latitude and longitude to the array coordinates. In the case of 5-Day means, the climatology is also interpolated linearly in time to the data times.
   Second, the anomalies are linearly interpolated, first in longitude where there are single missing values, second in time where gaps are smaller than 6 time intervals, and finally in latitude, where gaps are smaller than 7 degrees.
   Third, this gridded anomaly field is added to the climatology to produce the gridded mean field. Finally, both the means and anomalies are smoothed in time using a binomial (1/4-1/2-1/4) filter.
The original locations of data at the beginning and ending of the time series are shown by the little boxes on the vertical axes.

This gridding method is a variant of that used for the Lat-Long maps which was developed by Dr. William S. Kessler, Dr. Michael J. McPhaden, and Dai McClurg, all at PMEL/NOAA.