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Finding the Time Lag Between Solar Heating and Surface Temperature

Finding the Time Lag Between Solar Heating and Surface Temperature. EAS 4480: Data Analysis Final Project Arielle Nixon 24 April 2012. Introduction. Determine: correlation between incoming solar radiation at the Atlanta Hartsfield-Jackson Airport (KATL) and change in air temperature/SST

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Finding the Time Lag Between Solar Heating and Surface Temperature

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  1. Finding the Time Lag Between Solar Heating and Surface Temperature EAS 4480: Data Analysis Final Project Arielle Nixon 24 April 2012

  2. Introduction • Determine: • correlation between incoming solar radiation at the Atlanta Hartsfield-Jackson Airport (KATL) and change in air temperature/SST • Lag time between each of these correlated data sets

  3. Methods • Gather data: • Daily mean air temperature • Incoming solar insulation • Sea surface temperature • Compute Autocorrelations of each data set • Compute correlation coefficients to determine which components are most closely related • Cross correlate IR with Air Temp and SST to find lag time

  4. Climatological Daily Mean Temperatures from KATL for 2011

  5. Smoothed Climatological Daily Mean Temperatures from KATL for 2011

  6. Residual Climatological Daily Mean Temperatures from KATL for 2011

  7. Daily Mean and Smoothed Temperature from KATL for 2011

  8. Autocorrelation: Climatological Daily Mean Temperature

  9. Autocorrelation: Smoothed Daily Mean Temperature

  10. Autocorrelation: Residual of Daily Mean Temperature

  11. Autocorrelation: Daily Mean Incoming Solar Insulation

  12. Autocorrelation: Daily Mean Sea Surface Temperature

  13. Autocorrelation as a Function of Time Lag

  14. Correlation Coefficients

  15. Cross-Correlation between Smoothed Daily Temperature & Daily Incoming Solar Insulation Max correlation of 0.92814 at Lag= 17

  16. Cross-Correlation between Sea Surface Temperature & Daily Incoming Solar Insulation Max correlation of 0.85211 at Lag= 58

  17. Results At a time lag of 17 days, the increase/decrease in solar insulation has the most causal effect on the mean air temperature at KATL At a time lag of 58 days, the increase/decrease in solar insulation have the most causal effect on the sea surface temperature

  18. Resources • Daily Mean Air Temperature data • http://www.esrl.noaa.gov/psd/cgi-bin/data/getpage.pl • Incoming Solar Insulation data • http://aom.giss.nasa.gov/srlocat.html • Sea Surface Temperature Data • http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.highres.html

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