Equatorial Indian and Pacific Ocean 200 hPa Velocity Potential Anomaly

This is a Hovmöller diagram (Longitude x Time) showing pentad (five-day) running average velocity potential anomalies at 200 hPa averaged over 5°S to 5°N, for the past 180 days across the equatorial Indian and Pacific Oceans.

The shading for the velocity potential anomalies starts at +/- 10 x 10^5 m2/s, and the shading interval is 20 x 10^5 m2/s. Negative anomalies (in shades of green) indicate where the five-day average velocity potential was below the 1999-2020 mean, and positive anomalies (in shades of brown) indicate where the velocity potential was above the 1999-2020 mean. The longitude domain extends from 50°E to 80°W, and data from the last 180 days are shown, with the most recent data at the top of the figure. The vertical black line denotes 180° longitude.

Dataset Documentation

Equatorial Indian and Pacific Ocean 200 hPa Velocity Potential Anomaly

Data

NCEP/NCAR Reanalysis daily velocity potential at 200 hPa on a 2.5° lat/lon grid

Data Source

NOAA National Centers for Environmental Prediction (NCEP) (NCEP/NCAR Reanalysis)

Analysis

Equatorial average of five-day running average daily velocity potential anomalies (1999-2020 base period) at 200 hPa, displayed as a longitude x time Hovmöller diagram.

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