Want to improve your data skills? Also, a 3-month time average (running mean) is calculated in order to better isolate variability closely related to the ENSO phenomenon. By using this site you consent to the use of cookies.

Oceanic Niño Index From NOAA Climate Prediction Center (CPC).

Monthly Oceanic Nino Index (ONI) - Long.csv The Oceanic Nino Index (ONI) is one of the primary indices used to monitor the El Nino-Southern Oscillation (ENSO). By signing up you can: Three month running mean of NOAA ERSST.V5 SST anomalies in the Niño 3.4 region (5N-5S, 120-170W), based on changing base period which onsist of multiple centered 30-year base periods. International license. and Strong (≥ 1.5) events. Updated: Updated:

Except where otherwise noted, content on this site is This is where our declining trend may now dip strongly. The ONI is one measure of the El Niño-Southern Oscillation, and other indices can confirm whether features consistent with a coupled ocean-atmosphere phenomenon accompanied these periods.CSV version of the Monthly Oceanic Nino Index (ONI) dataset in a wide format that is easy for human beings to read.CSV version of the Monthly Oceanic Nino Index (ONI) dataset in a long format that is easy for machines to read. It is the running 3-month mean SST anomaly for the Nino 3.4 region (i.e., 5 o N-5 o S, 120 o-170 o W). HUMANITARIAN DATA EXCHANGE   v1.43.1 The Oceanic Niño Index (ONI) has become the de-facto standard that NOAA uses for identifying El Niño (warm) and La Niña (cool) events in the tropical Pacific.

Data Literacy Survey Direct Observational Data/Anecdotal Data Oceanic and Atmospheric Administration (NOAA) uses to identify El Niño (warm) and Link to Current Version of ONI : DESCRIPTION: Warm (red) and cold (blue) episodes based on a threshold of +/- 0.5 o C for the Oceanic Niño Index (ONI) [3 month running mean of ERSST.v3b SST anomalies in the Niño 3.4 region (5 o N-5 o S, 120 o-170 o W)], based on the 1971-2000 base period. October 9, 2017

These 30-year base periods will be used to calculate the anomalies for successive 5-year periods in the historical record.

is further broken down into Weak (with a 0.5 to 0.9 SST anomaly), Moderate (1.0 to 1.4) Related Platforms Log in October 9, 2017 Historic Oceanic Niño Index and Niño 3.4 Data Tweet ONI is a standard metric used to define the phase of the El Niño Southern Oscillation (ENSO). OUR OTHER SERVICES The ONI is calculated by averaging sea surface temperature anomalies in an area of the east-central equatorial Pacific Ocean, which is called the Nino-3.4 region (5S to 5N; 170W to 120W). The Oceanic Nino Index (ONI) is one of the primary indices used to monitor the El Nino-Southern Oscillation (ENSO). We've received your request ! Take this 5 minute survey to help the Centre shape its data literacy resources for humanitarians. Forgot your password? consecutive overlapping three month periods at or above the +0.5°C anomaly for warm (El it OCHA coordinates the global emergency response to save lives and protect people in humanitarian The expectation for a move to La Niña is now increasingly being ratified. crises.

anomaly for the El Niño 3.4 region (i.e., 5°N-5°S, 120°-170°W).

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Produced at NOAA/ESRL PSL. Forgot your password? The Oceanic Niño Index (ONI) is is NOAA's primary indicator for monitoring El Niño and La Niña, which are opposite phases of the climate pattern called the El Niño-Southern Oscillation, or “ENSO” for short. The threshold For an event to be categorized as weak, moderate or strong. DESCRIPTION: Warm (red) and cold (blue) periods based on a threshold of +/- 0.5oC for the Oceanic Niño Index (ONI) [3 month running mean of ERSST.v4 SST anomalies in the Niño 3.4 region (5oN-5oS, 120o-170oW)], based on centered 30-year base periods updated every 5 years.

Oceanic Niño Index Week ending: 25 July 2020 ️ Niño 3.4 = -0.4 °C ↓. SST is from the HadISST1.1. Cold and Warm episodes by season Events are defined as five

Thank you for using HDX ! Niño), events and at or below the -0.5 anomaly for cold (La Niña) events. Oceanic Niño Index (3MMA) Red = El Niño (E) , Blue = La Niña (L), S = Severe , VS = Very Severe , M = Moderate & W = Weak Source ðNational Oceanic and Atmospheric Administration (NOAA) Note: El Niño event is identified if ONI is above 0.5 for 5 consecutive months.

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