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 transcript:

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 Lag time between each of these correlated data sets

 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

Climatological Daily Mean Temperatures from KATL for 2011

Smoothed Climatological Daily Mean Temperatures from KATL for 2011

Residual Climatological Daily Mean Temperatures from KATL for 2011

Daily Mean and Smoothed Temperature from KATL for 2011

Autocorrelation: Climatological Daily Mean Temperature

Autocorrelation: Smoothed Daily Mean Temperature

Autocorrelation: Residual of Daily Mean Temperature

Autocorrelation: Daily Mean Incoming Solar Insulation

Autocorrelation: Daily Mean Sea Surface Temperature

Autocorrelation as a Function of Time Lag

Correlation Coefficients

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

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

 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

 Daily Mean Air Temperature data   Incoming Solar Insulation data   Sea Surface Temperature Data  isst.v2.highres.html isst.v2.highres.html Resources