Standardized Anomaly of the Depth of the 20°C Isotherm

This figure is a longitude-time Hovmoller diagram of the monthly standardized anomaly of the depth of the 20°C isotherm in the equatorial Pacific Ocean.

This longitude-time Hovmoller diagram extends from 121°E to 79°W, and includes the most recent 18 months, with the most recent data at the top. Anomalies of the depth of the GODAS 20°C monthly potential temperature isotherm are calculated with respect to the 1991-2020 climatology, standardized with respect to the same base period, and are averaged from 5°S to 5°N. Contours are drawn at an interval of 0.5 standard deviations. Yellow to red colors represent positive depth anomalies, and shades of blue represent negative anomalies.

Dataset Documentation

Standardized Anomaly of the Depth of the 20°C Isotherm

Data

NCEP Global Ocean Data Assimilation System (GODAS) monthly potential temperature on a 1.0° lon x 1/3° lat grid with vertical grid points at 5, 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, 115, 125, 135, 145, 155, 165, 175, 185, 195, 205, 215, 225, 238, 262, 303, 366, and 459 meters below the surface

Data Source

National Centers for Environmental Prediction (NCEP) (GODAS)

Analysis

Longitude-time Hovmoller diagram of the standardized depth of the GODAS 20°C potential temperature isotherm, calculated with respect to the 1991-2020 monthly climatology, averaged from 5°S to 5°N, and spanning the Pacific from 121°E to 79°W

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