Re: La Nina or El Nino.... which is it?
Posted by
cypresstx on 9/13/2011, 1:05 pm
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/lanina/enso_evolution-status-fcsts-web.pdf
Summary ~ La Niña conditions are present across the equatorial Pacific.* ~ Sea surface temperature (SST) anomalies have become increasingly negative in the east-central equatorial Pacific Ocean during the last several weeks. ~ Atmospheric circulation anomalies are consistent with La Niña. ~ La Niña is expected to strengthen and continue into the Northern Hemisphere winter 2011-12.*
* Note: These statements are updated once a month in association with the ENSO Diagnostics Discussion.
NOAA Operational Definitions for El Niño and La Niña
El Niño: characterized by a positive ONI greater than or equal to +0.5°C.
La Niña: characterized by a negative ONI less than or equal to -0.5°C.
By historical standards, to be classified as a full-fledged El Niño or La Niña episode, these thresholds must be exceeded for a period of at least 5 consecutive overlapping 3-month seasons. CPC considers El Niño or La Niña conditions to occur when the monthly Niño3.4 OISST departures meet or exceed +/- 0.5°C along with consistent atmospheric features. These anomalies must also be forecasted to persist for 3 consecutive months. |
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In this thread:
La Nina or El Nino.... which is it? -
BobbiStorm,
9/12/2011, 9:36 pm- Re: La Nina or El Nino.... which is it? - cypresstx, 9/13/2011, 1:05 pm
- Re: La Nina or El Nino.... which is it? - Shalista, 9/12/2011, 9:51 pm
- Re: La Nina or El Nino.... which is it? - Holly_Texas, 9/13/2011, 10:14 am
- Re: La Nina or El Nino.... which is it? - ArgosyTn, 9/13/2011, 10:09 am
- Re: La Nina or El Nino.... which is it? - Conclue, 9/13/2011, 2:05 pm
- Re: La Nina or El Nino.... which is it? - ArgosyTn, 9/13/2011, 4:22 pm
- Re: La Nina or El Nino.... which is it? - Skip Wiley, 9/14/2011, 9:56 pm
- Re: La Nina or El Nino.... which is it? - Zephyr, 9/14/2011, 8:13 am
- Re: La Nina or El Nino.... which is it? - Conclue, 9/13/2011, 10:56 pm
- Re: La Nina or El Nino.... which is it? - jimw, 9/13/2011, 7:19 pm
- Re: La Nina or El Nino.... which is it? - Shalista, 9/13/2011, 4:57 pm
- Re: La Nina or El Nino.... which is it? - Shalista, 9/13/2011, 2:14 pm
- Re: La Nina or El Nino.... which is it? - Fred, 9/13/2011, 9:08 am
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