|
In the upper left is a time
series of the available data at this location near the shelf break. The
black curve is the average seasonal fit at this location from 1985 to 1999.
The blue, green and red lines represent successive iterations of the Barnes
scheme to estimate sst. The value has converged to a best estimate in most
locations with only two iterations. In the lower right figure, contours of
sst correlation are shown for this location. Due to the large size of the
full correlation matrix, the correlation is only estimated for the 15
nearest neighbors in every direction resulting in the 31X31 array contoured
here. Notice the correlation is anisotropic, roughly following the shelf
break. The OA estimate is calculated as a weighted sum of the available data
in a fixed region of space and time. The spatial weighting is set by the
estimated stationary anisotropic inhomogeneous correlations calculated from
the data. In this case the temporal weighting is a 21 day Gaussian window.
|