August 2019 SST Anom (deg C)

August 2019 Sea Surface Temperature (SST) Assessment

These are the monthly SST updates for the month of August 2019.

A. Niño Regions

Niño SST Indices are based on the average of SST anomalies across the given regions: Niño 1+2 (0-10S, 90W-80W), Niño 3 (5N-5S, 150W-90W), Niño 3.4 (5N-5S, 170W-120W) and Niño 4 (5N-5S, 160E-150W). These indices are used to monitor the conditions in the Tropical Pacific for the occurrence of El Niño or La Niña events.

In August, sea surface temperatures were cooler than average in the eastern equatorial Pacific and near average in the central equatorial Pacific Ocean. However, SSTs west of the dateline were still above average. Cooler than average SSTs were observed near Indonesia and cooler to near average SSTs around the Philippines.

B. Indian Ocean Dipole (IOD)

The Indian Ocean Dipole mode Index (DMI) is defined as the difference between the SST anomalies (ºC) of Western (10ºS-10ºN & 50ºE-70ºE) and Eastern (10ºS-0ºN & 90ºE-110ºE) Equatorial Indian Ocean regions (WEST-EAST). The DMI values represent the intensity of the Indian Ocean Dipole (IOD); DMI values above +0.4 °C is referred as the positive IOD, DMI values below −0.4 °C is referred as the negative IOD and DMI values between +0.4 °C and -0.4 °C is referred as the neutral IOD.

The IOD was still positive during the month. The average sea surface temperatures over most of the central and western tropical Indian Ocean were warmer than average while the eastern tropical Indian Ocean were cooler than average.

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August 2019 SST (deg C)

August Normal SST (1981-2010) (deg C)