Physics 391 Arctic Ice Submission Template

1.  Paste/Insert your averaged data from 1870 to 2013 here:

2.   Paste/ Insert your differentiate slope vector plot vs time here:

3.  Paste/Insert your smoothing plots with all 3 smooth techniques on the same graph as applied to the average data, here.   Comment in the differences that you notice between the three smoothing techniques.   State why you think that the Gaussian approach works best on data like this.

4.  Paste/Insert your histogram of the yearly ratios here and comment on whether or not you think the distribution of this ratio parameter is random.

5.   This one has multiple parts for graphic insertion:

a) Insert the graph of the raw data corresponding to the period prior to 1975

b)  Insert a graph again with the raw data but with vertical lines on it that you have defined as your window which contains the feature(s). (it should look sometime like this )

 

c) Insert two plots here:  1) the cubic spline fit to the whole data, including features in this pre 1950 window (i.e. the first plot above); 2) show the cubic spline fit to the data without the windowed features  for a challenge try to show both cubic spline fits on the same graph.

d) Insert the flattened (base-line subtracted) plot here:

e)  Boxcar smooth the plot that you produced above in part d). and insert that here:

f) Determine the rms scatter about the baseline in the smoothed plot and calculate/estimate the area under the largest feature.    Explain your methodology.   What is the approximate signal-to-noise of that feature?

6.  Insert your plot of the 1979-current data with your functional representation extrapolated to the year that zero is reached.