Image: (Top) http// elnino.noaa (Bottom) Hathaway/NASA, 2011
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Transcript of Image: (Top) http// elnino.noaa (Bottom) Hathaway/NASA, 2011
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Solar Cycle Variations Influencing Oceanic Niño Index Anomalies Across
The Equatorial Pacific Ocean
Christopher Johnson SP11
Image: (Top) http//elnino.noaa.gov (Bottom) Hathaway/NASA, 2011
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Objective• Compare periods of increased solar luminosity to climate
variations• Increasing solar output should increase surface
temperatures on Earth, notably, sea surface temperature
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Solar Cycle• Differential rotation in plasma• Magnetosphere discontinuities• Sunspots occur on photosphere• Observed 11 year cycle• Luminosity increases during sunspot maximum
Image: nasa.gov
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Oceanic Niño Index• 3 month SST average• 5oN-5oS, 120o-170oW• Predicted 3-7 year cycle
• (+) El Niño• (-) La Niña
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Trend & Correlation
• Positive slope, low correlation, high random error.• Not indicating a linear trend
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• Chi Square 290• Chi Critical 36
• Not Normally Distributed
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Power Spectral Density - Periodogram
Periodicity in Sunspot 10.17 years Periodicity in ONI 5.08 years
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Cross Power Spectral Density
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Conclusion
• Low Correlation Coefficient• Sunspot trend 10.18 years (between 1950-2010)• ONI periodicity 5.08 years (between 1950-2010)• Lag Time between periodicity is 1.45 years• At this time no direct correlation was determined
between the solar sunspot cycle and Oceanic Niño Index in the southern Pacific