[Mitgcm-support] More: Barotropic Kalman filter (kf019) and control (c20000630) update.

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  http://escher.JPL.NASA.GOV:2000/HyperNews/get/forums/assim/106/1/1/1.html

Updated comparison of botom pressure data with barotropic Kalman filter
results (kf019) and control integration (c20000630):

Results reported in previous message[1] have been augmented with the
pressure gauge data of P.Woodworth and R.Peterson. The data are the
so-called level-4[2] data previously processed Raghu for the Fukumori et
al., 1999 JGR article. (The data span to end of 1996 and need to be
updated. I sent a message to R. Peterson on december 11 for this purpose
but have not heard back.) Raw time series comparisons are here[3] .
Updated skill table, with summary figure[4] , follow:

                       Variance                 Residual Variance
Longitude Latitude     Data   Simul.   Assim.   Simul.   Assim.    Skill
    77.58   -37.88  0.00178  0.00078  0.00087  0.00094  0.00109    -8.42 
    77.58   -37.90  0.00284  0.00111  0.00119  0.00190  0.00208    -6.61 
    53.47   -46.87  0.00139  0.00094  0.00099  0.00075  0.00063     8.61 
    51.94   -46.40  0.00143  0.00086  0.00097  0.00083  0.00076     5.03 
   303.64   -58.36  0.00309  0.00032  0.00037  0.00291  0.00298    -2.08 
   301.62   -54.94  0.00051  0.00018  0.00021  0.00053  0.00053    -1.11 
   301.62   -54.94  0.00051  0.00016  0.00020  0.00049  0.00050    -2.22 
   302.50   -56.84  0.00201  0.00016  0.00017  0.00194  0.00196    -0.83 
   305.28   -60.85  0.00234  0.00071  0.00080  0.00171  0.00172    -0.21 
   305.28   -60.85  0.00086  0.00051  0.00050  0.00068  0.00065     3.21 
    69.36   -47.66  0.00149  0.00115  0.00113  0.00113  0.00106     4.54 
   323.99   -32.00  0.00065  0.00033  0.00037  0.00065  0.00064     0.77 
   304.51   -59.73  0.00292  0.00026  0.00029  0.00278  0.00279    -0.48 
   301.61   -54.94  0.00022  0.00014  0.00018  0.00028  0.00027     1.72 
   301.61   -54.94  0.00034  0.00010  0.00016  0.00037  0.00034     7.33 
   305.28   -60.85  0.00041  0.00044  0.00038  0.00028  0.00023    13.78 
   305.29   -60.85  0.00062  0.00055  0.00053  0.00039  0.00045    -9.75 
   146.22   -44.11  0.00026  0.00008  0.00008  0.00023  0.00023    -2.71 
    17.80   -34.59  0.00031  0.00024  0.00029  0.00043  0.00043     0.54 
     2.34   -42.99  0.00206  0.00047  0.00059  0.00200  0.00173    13.08 
     3.02   -54.34  0.00129  0.00123  0.00129  0.00068  0.00058     7.39 
   357.36   -70.14  0.00060  0.00130  0.00139  0.00098  0.00116   -31.28 
   146.22   -44.12  0.00047  0.00011  0.00012  0.00042  0.00040     3.44 
   139.85   -65.56  0.00091  0.00064  0.00071  0.00049  0.00054    -5.71 
   357.39   -70.13  0.00103  0.00194  0.00199  0.00167  0.00172    -5.06 

where skill is defined as:

      (Residual Variance Simulation) - (Residual Variance Assimilation)
100 * -----------------------------------------------------------------
                              Variance Data

The BEMPEX[5] pressure gauge data has also been obtained from Doug
Luther, but that data spans 1986-1987 and has not been used for Kalman
filter evaluation.
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[1] http://escher.JPL.NASA.GOV:2000/HyperNews/get/forums/assim/106/1/1.html
[2] http://escher:2000/hosts/triton/dm1/dimitri/data/gloup/level4
[3] http://escher:2000/hosts/triton/dm1/dimitri/data/gloup/FIGS/raw
[4] http://escher:2000/hosts/triton/dm1/dimitri/data/gloup/FIGS/skill.ps
[5] http://escher:2000/hosts/triton/dm1/dimitri/data/gloup/bempex