Research notes and updates from the team.
During October 2024, slightly negative sea surface temperature (SST) anomalies persisted over the central-eastern equatorial Pacific Ocean, leading to a NINO3.4 anomaly index value of -0.28 °C. The weekly-averaged SST anomalies in the NINO3.4 region were -0.3 °C for the week centered on Nov 06, 2024. This indicates an ongoing ENSO-neutral state in the equatorial Pacific Ocean.
Read more →The SST anomaly in the NINO3.4 region during the Jul-Sep 2024 season was 0.0 °C, and for the month of September 2024 it was -0.15 °C. The most recent weekly average (week centered on 09 October 2024) of the NINO3.4 index was -0.50 °C. These values indicate that the current tropical Pacific state is ENSO-neutral.
Read more →Notes: The IRI seasonal forecasts of precipitation and temperature issued this month are based on an objective calibration procedure that combines the NCEP-CFSv2, CanSIPS-IC4, COLA-RSMAS-CESM1, GFDL-SPEAR, and NASA-GEOSS2S models. The climatological base period for normal is 1991-2020. The SST anomalies cited below refer to the OISST.v2.1 SST data set.
Read more →The SST anomaly in the NINO3.4 region during the Jun-Aug 2024 season was +0.13 °C, and for the month of August 2024 it was -0.07 °C. The most recent weekly average (week centered on 11 September 2024) of the NINO3.4 index was -0.2 °C. These values indicate that the current tropical Pacific state is ENSO-neutral.
Read more →During August 2024, slightly negative sea surface temperature (SST) anomalies appeared over the central-eastern equatorial Pacific Ocean, leading to a NINO3.4 anomaly index value of -0.07 °C. The weekly-averaged SST anomalies in the NINO3.4 region were -0.2 °C for the week centered on Sep 11, 2024. This indicates an ongoing ENSO-neutral state in the equatorial Pacific Ocean.
Read more →The SST anomaly in the NINO3.4 region during the May-Jul 2024 season was +0.25 °C, and for the month of July 2024 it was +0.21 °C. The most recent weekly (week centered on 07 August 2024) of the NINO3.4 index was 0.0 °C. These values indicate that the tropical Pacific is in the ENSO-neutral state.
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