The major modes of winter atmospheric variability have been well-documented (e.g. the Annular Modes, the Pacific North American Pattern, etc), but the summer has rarely been written about. We've taken a close look at the dominant modes of summer atmospheric variability, and how these modes differ from those of the winter.

(Please note, I'm still reorganizing these pages, so what's presented here is currently a bit sparse on background, and in the format of notes to Mike Wallace, my advisor.)

• Seasonal Comparison of EOFs and Regression Maps.
  • This is a writeup of some work I did comparing EOFs and regression maps of Sea Level Pressure, 500 mb height, Surface Air Temperature, and 1000-500 mb thickness for winter and summer. Along with the maps, I also created phase plots showing how the principal components of each field relate to each other by season, and looked at the effect of interannual and intraseasonal averaging on the modes of variability.
• Window Analysis:
  • This writeup shows how the EOFs of different temperature related fields vary throughout the year, and how they're impacted by detrending, interseasonal, and intraseasonal averaging. I've used a moving three month window to calculate the first three EOFs for the University of Deleware surface air temperature data set, the MSU TLT (lower troposphere) temperature, and the NCEP reanlysis for the 1000-500mb thickness field.

• EOT analysis:
  • As part of our analysis, we employed Van Den Dool's Empirical Orthogonal Teleconnection analysis to pick out the major modes of variability in our data sets and verify that the structures were similar to what the EOFs were giving us.

• Etc. -- a collection of other things that I'd like to keep track of, but are rough or don't quite fit in a category.
  • Point by Point correlation maps of SLP, T, and Z500
  • Climatology of SLP by month
  • Climatology of 500 mb height by month
  • Variance of summer and winter SAT and SLP fields
  • Standard deviation of summer and winter SAT and SLP fields
    
  • Summer and winter SAT climatology
    
  • Comparison of eigenvalue spectra for summer and winter SAT and SLP fields
  • Summer EOF domain dependence
  • Summer EOFs - EOFs 1 and 2 of summer MSU, SAT, and 1000-500 mb thickness.
  • One Point Correlations of SAT with summer SAT centers of action.