NINO 3.4 INDEX
type: Concept

EAST CENTRAL TROPICAL PACIFIC SST
type: Concept
change note: 2012-06-25 13:10:31.0 [mpmorahan] Insert Concept add narrower relation (EAST CENTRAL TROPICAL PACIFIC SST [01b96758-13f3-4cea-8447-decae36b1bde,22203] - NINO 3.4 INDEX [a084d58c-c4f6-40fa-a645-96d9bef021aa,39755]);
change note: 2012-06-25 12:09:02.0 [mpmorahan] Move Concepts delete broader relation (null); add broader relation (NINO3.4 INDEX [01b96758-13f3-4cea-8447-decae36b1bde,22203] - SEA SURFACE TEMPERATURE INDICES [b83895e9-bac8-49fe-bcf5-8fe4d8fcaa16,39747]);
change note: 2012-06-25 13:09:00.0 [mpmorahan] MMORAHAN (20120625)- CHANGE NAME update PrefLabel (EAST CENTRAL TROPICAL PACIFIC SST);
definition: The NINO3.4 index is one of several El Niño/Southern Oscillation (ENSO) indicators based on sea surface temperatures. NINO3.4 is the average sea surface temperature anomaly in the region bounded by 5°N to 5°S, from 170°W to 120°W. This region has large variability on El Niño time scales, and is close to the region where changes in local sea-surface temperature are important for shifting the large region of rainfall typically located in the far western Pacific. An El Niño or La Niña event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niño or -0.4°C for La Niña for at least 6 consecutive months.
in scheme: sciencekeywords

SEA SURFACE TEMPERATURE INDICES
type: Concept