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

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Presentation on theme: "Finding the Time Lag Between Solar Heating and Surface Temperature EAS 4480: Data Analysis Final Project Arielle Nixon 24 April 2012."— Presentation transcript:

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  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 Methods

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  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 Results

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

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