EOFS

Syntax (without rotation):

Field
{Y cosd}[X Y][T]svd

Example:

  • First EOF normalized structure of SST anomalies

  • Second EOF normalized structure of SST anomalies

  • First EOF "energy-containing" structure of SST anomalies

  • Normalized eigenvalues of SST anomalies

  • Singular values of SST anomalies

  • First EOF time series of SST anomalies

  • Variance of first 5 EOFS of DJF Stream Function

  • PC NAO: DJFM NCEP SLP energy-containing structure

  • PC NAO: DJFM NCEP SLP timeseries

  • PC NAO: DJFM NCEP SLP timeseries correlation with CPC (0.91)

  • PC NAO: Compo DJFM SLP 1949-on energy-containing structure

  • PC NAO: Compo DJFM SLP 1949-on timeseries

  • PC NAO: Compo DJFM SLP 1949-on timeseries correlation with CPC (0.89)

  • PC NAO: Compo DJFM 1870-on energy-containing structure

  • PC NAO: Compo DJFM 1870-on timeseries

    • Troubleshooting:

    Will not work if data is too large. Need to cut in space or time.

    Please see the Ingrid statistical analysis tutorial on SVD for more information here.

    Don't worry if this takes a long time for the ingrid browser to process if working with a global grid and/or a long time period.

    EOF number is located in grid ev. Can select ev by VALUE, VALUES, or RANGE.

    Weighting factor {Y cosd} weights grid boxes near the equator more than boxes near the pole.

    Syntax (with rotation):

    Field
    {Y cosd}[X Y][T]svd
    number varimax

    Example:

  • 5 rotated EOFS of DJF Stream Function

  • Total variance of 5 rotated EOFS of DJF Stream Function

    • Troubleshooting:

    Total variance does not change in rotation.