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Weekly Sea Surface Temperature and Monthly Sub-Surface Potential Temperature Anomaly

These are Hovmöller diagrams (Longitude x Time) showing either weekly average sea surface temperature anomalies (SSTA) or monthly potential temperature anomalies at depths of 55 and 155 meters, averaged over 5°S to 5°N, for the past year across the equatorial Pacific Ocean. These diagrams can be used to track the evolution and migration of sub-surface temperature anomalies that could contribute to changes in sea surface temperatures in the future in the key NINO regions across the equatorial Pacific used to monitor the development of ENSO.

The sea surface temperature anomalies are contoured at an interval of 0.5°C, and the contours and shading start at +/- 0.5°C. Negative anomalies (in shades of blue) indicate where the weekly average temperature was below the 1971-2000 mean for that week of the year, and positive anomalies (in shades of yellow and red) indicate where temperatures were above the long-term mean. The longitude domain extends from 120°E to 80°W, and data from the past year are shown, with time increasing vertically.

For the sub-surface potential temperature anomalies, contours are drawn at intervals of 0.5°C; negative values (in shades of blue) indicate below-normal potential temperatures with respect to the 1981-2010 mean, and positive values (in shades of yellow and red) represent above-normal potential temperatures with respect to the 1981-2010 mean. The longitude domain extends from 120°E to 80°W, and data from the last year are shown, with time increasing vertically.

Dataset Documentation

Monthly Sub-Surface Potential Temperature Anomaly

Data
NOAA NCEP Global Ocean Data Assimilation System (GODAS) monthly potential temperature data on a 1.0° lat/lon grid
Data Source
NOAA National Centers for Environmental Prediction (NCEP) (GODAS)
Analysis
Equatorial (5°S to 5°N) average of monthly potential temperature anomalies, displayed as a longitude x time Hovmöller diagram

Weekly Sea Surface Temperature Anomaly

Data
Reynolds and Smith OISST Version 2 weekly sea surface temperature anomaly (in °C) on a 1.0° lat/lon grid
Data Source
NOAA National Centers for Environmental Prediction (NCEP) (OISST Version 2 documentation, OISST Version 2 Data Library entry)
Analysis
Equatorial (5°S to 5°N) average of weekly sea surface temperature anomalies, displayed as a longitude x time Hovmöller diagram

Dataset

Access the dataset used to create this map.

Helpdesk

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