TAO Home About the TAO project Data display pages Data access El Niño and La Niña information Site map
TAO Depth-Longitude gridding

All of the fields displayed as depth-longitude sections are fields of gridded monthly or 5-day means. Gridding was done by 1) removing the Kessler (1994) CTD/XBT Objective Analysis from the temperatures after bilinearly interpolating it to a 1° by 1° latitude-longitude grid, and in the case of 5-day means, also interpolating the climatology to the data times. 2) linearly interpolating the monthly or 5-day data anomalies at the nominal TAO/TRITON array coordinates to these standard depths:

0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 160, 180, 200, 225, 250, 275, 300, 400, 500 (m)

3) linearly interpolating in longitude to 1° spacing, 4) 21° triangle filtering in longitude, 5) distance-weighted binomial (1/4-1/2-1/4) filtering in depth, and 6) adding these gridded and smoothed anomalies to the Kessler objective analysis to produce the mean depth-longitude fields.

The locations of data input to the gridding routine are indicated by the little x's on the plots.

For more information on the Kessler (1994) Objective Analysis of Historical CTD and XBT temperatures, see the TAO Climatology Background page, and to see plots of the Kessler Analysis, see the TAO Climatology page under the "Depth-Longitude Sections of Temperature".

Home | Project overview | Data display | Data delivery | El Niño & La Niña | Site map

TAO Project Office
| Pacific Marine Environmental Laboratory
7600 Sand Point Way NE
Seattle, WA 98115
Credits | Disclaimer | Privacy Policy