Research notes and updates from the team.
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 →During July 2024, weakly positive sea surface temperature (SST) anomalies persisted over the central-eastern equatorial Pacific Ocean, leading to a NINO3.4 anomaly index value of +0.21 °C. The weekly-averaged SST anomalies in the NINO3.4 region were 0.0 °C for the week centered on Aug 07, 2024. This indicates an ongoing ENSO-neutral state in the equatorial Pacific Ocean.
Read more →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, and 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 IRI seasonal forecasts of precipitation and temperature issued this month are based on an objective calibration procedure that combines the NCEP-CFSv2, CanSIPS-IC3, COLA-RSMAS-CESM1, and 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 →During April 2024, there was a further decline in the sea surface temperatures (SSTs) within the central-eastern equatorial Pacific Ocean compared to the preceding month, leading to a NINO3.4 anomaly index value of +0.81 °C. The weekly-averaged SST anomalies in the NINO3.4 region were +0.30 °C for the week centered on May 08, 2024.
Read more →During March 2024, there was a further decline in the sea surface temperatures (SSTs) within the central-eastern equatorial Pacific Ocean compared to the preceding month, leading to a NINO3.4 anomaly index value of +1.24 °C. The weekly-averaged SST anomalies in the NINO3.4 region were +0.90 °C for the week centered on April 10, 2024.
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