First Homework Assignment Manipulating lots of data

Basline Subtracted Data

Moving Average Waveforms

Subtracting Baselines  Temperature anomaly for a year is simply that year’s temperature minus some constant that was obtained from your baseline averaging.  The waveform is unaltered, only the zero level (or intercept) is changed  1900 baseline average temperature is 0.9 C lower than

Linear Regime (when positive residuals start: present

Linear Regime: present

Slopes and Scatter  Slopes are in degrees C per decade  1970: / /  1915: / /  All: / /  100: / /  50: / /  25: / /- 0.11

95% Confidence Temps in 2050  All: / (relative to 2007)  100: /  50: /  25: /  /  1915: /  Data is consistent with claim that 2050 temp will be C (1.8-2 F) higher than now !

Global mean temperature (our values are slightly higher due too urbanization correction in the data) Contamination and data reliability/correction problems render this approach the least convincing Contamination and data reliability/correction problems render this approach the least convincing This is reflected in the relatively large error bars on overall amplitude of warming This is reflected in the relatively large error bars on overall amplitude of warming

Consensus in Data Sets But different analyses use different sets of thermometers and different selection criteria But different analyses use different sets of thermometers and different selection criteria Statistical agreement is good Statistical agreement is good

Chi^2 This was tricky and confusing This was tricky and confusing You need to compare data on a year by year basis You need to compare data on a year by year basis Pay attention to what happens on the whiteboard now Pay attention to what happens on the whiteboard now Chi^2 per degree of freedom for 1970 =1.53 Chi^2 per degree of freedom for 1970 =1.53 Chi^2 per degree of freedom for 1915 = 2.40 Chi^2 per degree of freedom for 1915 = 2.40

Central Europe Summer Signal Huge statistical signal via baseline/area test Huge statistical signal via baseline/area test

Baseline Variations

Winter Time Result

Summer Time Result