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Climate of 2007 El Niño/Southern Oscillation (ENSO) National Climatic Data Center, Last updated - 15 January 2008
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ENSO OVERVIEW DISCUSSION
La Niña conditions intensified in December as Sea Surface Temperature (SST) anomalies remained significantly below normal across the equatorial Pacific basin and atmospheric conditions reflected a strengthening of the cold event.
In the Niño 3.4 index region of the central Pacific, the SST anomaly decreased to a monthly averaged value of -1.32°C (-2.38°F), a cooling of 0.05°C (0.09°F) compared with the November value. In the eastern equatorial Pacific and along the South American coast, below normal ocean surface and mixed-layer temperatures also persisted in December. For the month, the SST anomaly in the Niño 1+2 region was -2.04°C (-3.67°F, ) making it the tenth consecutive month with cooler-than-normal SSTs in this region. In the western tropical Pacific, SSTs were also below normal in December, although they warmed slightly from the previous month. The anomaly in the Niño 4 region was -0.73°C (-1.31°F) in December, which was a slight warming of 0.08°C (1.14°F) from the November anomaly.
Atmospheric conditions in December intensified and became more indicative of an ENSO cold phase (La Niña). Specifically, the Outgoing Longwave Radiation (OLR) index increased signficantly to a positive monthly value of +2.2, and the Southern Oscillation Index (SOI) reached its highest value of the 2007/2008 La Niña event, increasing to +1.8 for the month — the fifth consecutive month with a positive SOI value.
Therefore, all of the oceanic and atmospheric indicators reflected the persistence and slight intensification of moderate La Niña conditions in December.
KEYWORDS:
ENSO;
Niño Regions;
Southern Oscillation Index (SOI);
Kelvin Waves;
Thermocline;
Sea-Surface Temperatures (SSTs);
Madden-Julian Oscillation (MJO);
Walker Circulation
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LA NIÑA CONDITIONS INTENSIFY: SOI REACHES ITS HIGHEST VALUE OF THE COLD EVENT
Larger image of December SSTs
Loop of December SSTs
Larger image of December Sub-Surface Temperatures
Loop of December Sub-Surface Temperatures
Larger image of December SST Anomalies
Larger image of 3-month (Oct-Dec) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been cooler-than-average over the past several months as a La Niña event developed and reached maturity. The cold anomalies persisted in December as the SSTs decreased across the central equatorial Pacific region. Water temperatures in the upper ocean also remained below normal, with an area of -2.0°C (-4.4°F) and cooler temperature anomalies in the mixed-layer in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific this month, primarily west of the Date Line.
For the month, the SST anomaly in the Niño 3.4 Index region was -1.32°C (-2.38°F), which was a decrease of 0.05°C (0.09°F) compared to the November value. The SSTs in the Niño 4 Index region of the western equatorial Pacific were also below normal in December, with an anomaly of -0.73°C (-1.31°F) for the month (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for December 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months kept the 3-month running mean below -0.5°C (-0.9°F) in December, which is the Oceanic Niño Index (ONI) threshold for a cold event (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that ENSO remained in a moderate cold phase (La Niña), while the latest ENSO Wrap-Up from the Australian Bureau of Meteorology (BoM) concurred that La Niña conditions had intensified in the equatorial Pacific basin during December. Both CPC and the BoM have indicated that the La Niña will persist over the next several months, into the Boreal spring.
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Larger image of December SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was +1.8 in December, which was the highest SOI of the 2007/2008 La Niña so far. Overall, December was the fifth consecutive month with a positive index value [consistently positive (negative) values of the SOI are typical of La Niña (El Niño) conditions]. Therefore, the persistence of positive monthly SOI values over the past several months, as well as the increase in the SOI in December, indicates that the La Niña has entered its mature phase across the equatorial Pacific basin.
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LA NIÑA CONDITIONS PERSIST: SSTs CONTINUE TO COOL ACROSS THE EQUATORIAL PACIFIC
Larger image of November SSTs
Loop of November SSTs
Larger image of November Sub-Surface Temperatures
Loop of November Sub-Surface Temperatures
Larger image of November SST Anomalies
Larger image of 3-month (Sep-Nov) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been cooler-than-average over the past several months, due to the development of a La Niña event. The observed cooling trend continued in November as the SST anomalies continued to decrease across the entire equatorial Pacific region. Water temperatures in the upper ocean also remained below normal, with an area of -2.0°C (-4.4°F) and cooler temperature anomalies in the mixed-layer in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific, west of the Date Line in November.
For the month, the SST anomaly in the Niño 3.4 Index region was -1.27°C (-2.29°F), which was a decrease of -0.20°C (-0.36°F) compared to the October value. The SSTs in the Niño 4 Index region of the western equatorial Pacific were also below normal in November, with an anomaly of -0.81°C (-1.46°F) for the month (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for November 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months kept the 3-month running mean below -0.5°C (-0.9°F) in November, which is the Oceanic Niño Index (ONI) threshold for a cold event (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that ENSO continued to be in a cold phase (La Niña), while the latest ENSO Wrap-Up from the Australian Bureau of Meteorology (BoM) concurred that La Niña conditions were present in the equatorial Pacific basin. Both CPC and the BoM have indicated that the La Niña will persist over the next several months, at least into early 2008.
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Larger image of November SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was +0.9 in November. Despite a brief excursion to a negative SOI in July (-0.5), five of the past six months have had positive index values [consistently positive (negative) values of the SOI are typical of La Niña (El Niño) conditions]. Therefore, the persistence of positive monthly SOI values over the past several months, as well as the increase in the SOI in November, indicates the development of a La Niña sea level pressure pattern across the equatorial Pacific basin.
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LA NIÑA CONDITIONS INTENSIFY: SSTs CONTINUE TO COOL ACROSS EQUATORIAL PACIFIC
Larger image of October SSTs
Loop of October SSTs
Larger image of October Sub-Surface Temperatures
Loop of October Sub-Surface Temperatures
Larger image of October SST Anomalies
Larger image of 3-month (August-October) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been cooler-than-average over the past several months, as ENSO was in transition from a neutral to a cold phase. The observed cooling trend continued in October, as the SST anomalies decreased across the entire equatorial Pacific basin. Water temperatures in the mixed-layer also remained below normal, with an area of -3.0°C (-4.4°F) and cooler temperature anomalies between 50-200 meters depth in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in October.
For the month, the SST anomaly in the Niño 3.4 Index region was -1.07°C (-1.93°F), which was a decrease of -0.20°C (-0.36°F) compared to the September value. The SSTs in the Niño 4 Index region of the western equatorial Pacific were also below normal in October, with a monthly anomaly of 0.47°C (0.85°F) below the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for October 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months kept the 3-month running mean below -0.5°C (-0.9°F) in October, which is the Oceanic Niño Index (ONI) threshold for a cold event (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that ENSO was officially in a cold phase (La Niña), while the latest ENSO Wrap-Up from the Australian Bureau of Meteorology (BoM) concurred that La Niña conditions were present in the equatorial Pacific basin. Both CPC and the BoM have indicated that the La Niña will persist over the next several months, at least into early 2008.
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Larger image of October SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was +0.6 in October. Despite a brief excursion to a negative SOI in July (-0.5), four of the past five months have had positive index values [consistently positive (negative) values of the SOI are typical of La Niña (El Niño) conditions]. Therefore, the persistence of positive monthly SOI values over the past several months indicates the development of a La Niña sea level pressure pattern across the equatorial Pacific basin.
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LA NIÑA CONDITIONS DEVELOP: SSTs CONTINUE TO COOL ACROSS EQUATORIAL PACIFIC
Larger image of September SSTs
Loop of September SSTs
Larger image of September Sub-Surface Temperatures
Loop of September Sub-Surface Temperatures
Larger image of September SST Anomalies
Larger image of 3-month (July-September) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been near or slightly cooler-than-average over the past six months, as ENSO was in transition from a neutral to a cold phase. However, during the past several months the SSTs decreased across the entire equatorial Pacific region, and this trend continued in September. Water temperatures in the mixed-layer remained below normal, with an area of -2.0°C (-3.6°F) and cooler temperature anomalies between 50-200 meters depth in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in September.
For the month, the SST anomaly in the Niño 3.4 Index region was -0.87°C (-1.57°F), which was a decrease of -0.14°C (-0.25°F) compared to the August value. The SSTs in the Niño 4 Index region of the western equatorial Pacific also decreased in September, which resulted in a monthly anomaly of 0.47°C (0.85°F) below the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for September 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months decreased the 3-month running mean below the long-term average during September. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that ENSO was in a cold phase (La Niña), while the latest ENSO Wrap-Up from the Australian Bureau of Meteorology (BoM) concurred that La Niña conditions had developed in the equatorial Pacific basin. Both CPC and the BoM have indicated that the La Niña will persist over the next several months, at least into early 2008.
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Larger image of September SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was +0.2 in September. Despite a brief excursion to a negative SOI in July (-0.5), three of the past four months have had positive index values [consistently positive (negative) values of the SOI are typical of La Niña (El Niño) conditions]. Therefore, the recent shift to a positive SOI was indicative of a La Niña sea level pressure pattern across the equatorial Pacific basin.
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ENSO IN TRANSITION TO LA NIÑA: SSTs COOL ACROSS EQUATORIAL PACIFIC
Larger image of August SSTs
Loop of August SSTs
Larger image of August Sub-Surface Temperatures
Loop of August Sub-Surface Temperatures
Larger image of August SST Anomalies
Larger image of 3-month (June-August) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been near or slightly cooler-than-average over the past several months, as the phase of ENSO was neutral. However, during August the SSTs decreased across the entire equatorial Pacific region. In addition, water temperatures in the mixed-layer remained below normal, with an area of -2.0°C (-3.6°F) and cooler temperature anomalies between 50-200 meters depth in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in August.
For the month, the SST anomaly in the Niño 3.4 Index region was -0.73°C (-1.31°F), which was a decrease of -0.44°C (-0.79°F) compared to the July value. The SSTs in the Niño 4 Index region of the western equatorial Pacific also decreased in August, which resulted in a monthly anomaly of 0.11°C (0.19°F) below the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for August 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months decreased the 3-month running mean below the long-term average during August. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that the current phase of ENSO was in a transition from neutral conditions to a cold phase (La Niña), while the latest ENSO Update from the Australian Bureau of Meteorology (BoM) also reflected the transition to La Niña conditions in the equatorial Pacific basin. Both CPC and the BoM have indicated that this transition to La Niña will continue over the next 1-3 months (see the Australian BoM ENSO Wrap-Up).
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Larger image of August SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was +0.1 in August. Despite a brief excursion to a negative SOI in July (-0.5), two of the past three months have had positive index values [consistently positive (negative) values of the SOI are typical of La Niña (El Niño) conditions].
Over the past six months, the SOI was inconsistent with the other atmospheric and oceanic indicators, as it remained mostly negative. However, the shift to a positive index in August was indicative of a transition in the sea level pressure pattern across the equatorial Pacific basin.
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NEUTRAL PHASE OF ENSO PERSISTS: COOLING SSTs INDICATE THE POSSIBLE DEVELOPMENT OF LA NIÑA
Larger image of July SSTs
Loop of July SSTs
Larger image of July Sub-Surface Temperatures
Loop of July Sub-Surface Temperatures
Larger image of July SST Anomalies
Larger image of 3-month (May-July) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been near or slightly cooler-than-average over the past several months, as the phase of ENSO was neutral. During July, the SSTs decreased across the equatorial Pacific region, as a weak Kelvin wave propagated across the basin. Water temperatures in the mixed-layer remained below normal, with an area of -2.0°C (-3.6°F) and cooler temperature anomalies between 100-200 meters depth in the central and eastern equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in July.
For the month, the SST anomaly in the Niño 3.4 Index region was -0.29°C (-0.52°F), which was a decrease of -0.38°C (-0.68°F) compared to the June value. The SSTs in the Niño 4 Index region of the western equatorial Pacific also decreased slightly during July, which resulted in a monthly anomaly of 0.05°C (0.09°F) above the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for July 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months decreased the 3-month running mean below the long-term average during July. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The NOAA Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that the current phase of ENSO was neutral, while the latest ENSO update from the Australian Bureau of Meteorology (BoM) also reflected the ENSO-neutral conditions in the equatorial Pacific basin. Both CPC and the BoM have indicated a slightly greater than 50% chance of a La Niña event developing over the next 1-3 months (see the Australian BoM ENSO Wrap-Up).
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Larger image of July SOI
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Southern Oscillation Index (SOI):
The standardized value of the SOI was -0.5 in July. Despite a brief excursion to a positive SOI in June, seven of the previous eight months have had negative SOI values [consistently negative (positive) values of the SOI are typical of El Niño (La Niña) conditions].
Therefore, the SOI has been inconsistent with other atmospheric and oceanic indicators over the past several months, and during July the SOI was indicative of an El Niño-type sea level pressure pattern across the equatorial Pacific basin.
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ENSO REMAINS IN NEUTRAL PHASE: SSTs WARM ACROSS THE CENTRAL EQUATORIAL PACIFIC
Larger image of June SSTs
Loop of June SSTs
Larger image of June Sub-Surface Temperatures
Loop of June Sub-Surface Temperatures
Larger image of June SST Anomalies
Larger image of 3-month (April-June) averaged SST Anomalies
Larger image of 3-month (April-June) TAO Buoy SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific Ocean surface and subsurface temperatures have been near- or cooler-than-average over the past several months, as the phase of ENSO was neutral. During June, the SSTs warmed across the equatorial Pacific region, as a weak Kelvin wave propagated across the basin. However, water temperatures in the mixed-layer remained below normal, with an area of -2.0°C (-3.6°F) and cooler temperature anomalies between 100-200 meters depth in the central equatorial Pacific. Warmer-than-average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in June.
For the month, the SST anomaly in the Niño 3.4 Index region was +0.09°C (+0.16°F), which was an increase of +0.46°C (+0.83°F) compared to the May value. The SSTs in the Niño 4 Index region of the western equatorial Pacific also warmed slightly during June, which resulted in a monthly anomaly of 0.19°C (0.34°F) above the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for June 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months decreased the 3-month running mean below the long-term average during June. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that the current phase of ENSO was neutral, while the latest ENSO update from the Australian Bureau of Meteorology (BoM) also reflected the ENSO-neutral conditions in the equatorial Pacific basin. Both CPC and the BoM have indicated an elevated probability of a La Niña cold event developing over the next 1-3 months (see the Australian BoM ENSO Wrap-Up).
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ENSO REMAINS IN NEUTRAL PHASE: COOLER SSTs PERSIST IN THE EASTERN EQUATORIAL PACIFIC
Larger image of May SSTs
Loop of May SSTs
Larger image of May Sub-Surface Temperatures
Loop of May Sub-Surface Temperatures
Larger image of May SST Anomalies
Larger image of 3-month (Mar-May) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Equatorial Pacific ocean surface and subsurface temperatures have been near- or cooler-than-average over the past several months, as the 2006/2007 El Niño warm event dissipated and the phase of ENSO transitioned to neutral. The cooling has been most pronounced at the surface and in the mixed-layer across the eastern equatorial Pacific. During May, water temperatures in the mixed-layer remained below normal, with an area of -3.0°C (-5.4°F) and cooler temperature anomalies between 50-150 meters depth in the eastern equatorial Pacific. However, warmer than average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in May, while in the central tropical Pacific the monthly SSTs were near-normal.
For the month, the SST anomaly in the Niño 3.4 Index region was -0.37°C (-0.66°F), which was a change of -0.46°C (-0.83°F) compared to the April value. The SSTs in the Niño 4 Index region of the western equatorial Pacific also cooled slightly during May, which had a monthly anomaly of 0.17°C (0.36°F) above the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for May 2007.
The cooling of the SST anomalies in the Niño 3.4 index region over the past several months decreased the 3-month running mean below the long-term average for May. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that the current phase of ENSO was neutral, while the latest ENSO update from the Australian Bureau of Meteorology (BoM) also reflected the ENSO-neutral conditions in the equatorial Pacific basin. Both CPC and the BoM have indicated an elevated probability of a La Niña cold event developing over the next 1-3 months (see the Australian BoM ENSO Wrap-Up).
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Larger image of May SOI
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Southern Oscillation Index (SOI):
The standardized SOI was -0.4 in May. This was the 3rd consecutive month with an SOI value of -0.4, and the 6th straight month with a negative index value [consistently negative (positive) values of the SOI are typical of El Niño (La Niña) conditions]. However, the overall trend in the monthly SOI values has slowly evolved toward neutral since October, when the SOI fell to -1.7 (the lowest index value of the 2006/2007 El Niño event).
Note, the SOI will potentially transition to positive values over the next several months, as NOAA's Climate Prediction Center (CPC) has forecasted the likely development of La Niña (cold event) conditions during June-August 2007.
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NEUTRAL ENSO PHASE PERSISTS: SSTs REMAIN COOL ACROSS THE EASTERN EQUATORIAL PACIFIC
Larger image of April SSTs
Loop of April SSTs
Larger image of April Sub-Surface Temperatures
Loop of April Sub-Surface Temperatures
Larger image of April SST Anomalies
Larger image of 3-month (Feb-Apr) averaged SST Anomalies
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Sea-Surface Temperatures (SSTs) and
Mixed-Layer Conditions:
Ocean surface and subsurface temperatures have been near- or cooler-than-average over the past several months, as the 2006/2007 El Niño warm event dissipated. The cooling has been most pronounced in the mixed-layer across the eastern equatorial Pacific. During April, water temperatures in the mixed-layer remained below normal, with an area of -3.0°C (-5.4°F) and cooler temperature anomalies between 50-150 meters depth in the eastern equatorial Pacific. However, warmer than average upper ocean temperatures remained in the far western equatorial Pacific west of the Date Line in April, as well as in the central tropical Pacific where the monthly SSTs were near-normal.
For the month, the SST anomaly in the Niño 3.4 Index region was +0.09°C (+0.16°F), which was a change of +0.20°C (+0.36°F) compared to the monthly anomaly for March. The SSTs in the Niño 4 Index region of the western equatorial Pacific cooled slightly during April, which had a monthly anomaly of +0.34°C (+1.21°F) above the mean (map of Niño regions). For the most recent global ocean surface temperatures, please see the loop of satellite-derived weekly SST anomalies for April 2007.
The recent cooling of SST anomalies in the Niño 3.4 index region brought the 3-month running mean below +0.5°C (+0.9°F) in April. (NOTE: For NOAA's official ENSO classification scheme, please see NOAA's El Niño/La Niña Index Definition).
The Climate Prediction Center's most recent ENSO Diagnostic Discussion indicated that the phase of ENSO was neutral. The latest ENSO update from the Australian Bureau of Meteorology (BoM) also reflected the transition to neutral ENSO conditions in the equatorial Pacific basin. Both CPC and the BoM have indicated an elevated probability of a La Niña cold event developing over the next several months (see the Australian BoM ENSO Wrap-Up).
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ENSO IN NEUTRAL PHASE: SSTs REMAIN COOL ACROSS THE EASTERN EQUATORIAL PACIFIC
EL NIÑO EVENT DISSIPATES RAPIDLY: COOLER SSTs DEVELOP ACROSS THE CENTRAL EQUATORIAL PACIFIC
Larger image of February SOI
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Southern Oscillation Index (SOI):
The standardized SOI was -0.5 in February. The SOI has shown considerable variablity during the 2006/2007 El Niño event, although it was negative for the first three months of 2007. Before this, the SOI was negative for six consecutive months during the formative phase of the most recent El Niño [note that consistently negative (positive) values of the SOI are typical of El Niño (La Niña) conditions].
A transition to near-neutral SOI values, and potentially postive monthly values, is possible over the next several months as NOAA's Climate Prediction Center (CPC) has forecasted a transition from neutral to La Niña conditions during April-June 2007.
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EL NIÑO EVENT WEAKENS: SSTs COOL ACROSS THE EQUATORIAL PACIFIC
ENSO Links
Questions?
For all climate questions other than questions concerning this report, please contact the National Climatic Data Center's Climate Services Division:
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- Climate Services Division
NOAA/National Climatic Data Center 151 Patton Avenue Asheville, NC 28801-5001 fax: 828-271-4876 phone: 828-271-4800 email: questions@ncdc.noaa.gov
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For further information on the historical climate perspective presented in this report, contact:
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- David Levinson
NOAA/National Climatic Data Center 151 Patton Avenue Asheville, NC 28801-5001 fax: 828-271-4328 email: David.Levinson@noaa.gov
-or-
- Jay Lawrimore
NOAA/National Climatic Data Center 151 Patton Avenue Asheville, NC 28801-5001 fax: 828-271-4328 email: Jay.Lawrimore@noaa.gov
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NCDC / Climate Monitoring / 2007 / ENSO / Help
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