Correlation of AVHRR imagery with sub-surface features in the California current
Best, Jeffrey Scott
Ramp, Steven R.
Thornton, Edward B.
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SST fields derived from AVHRR imagery are compared with subsurface temperature and surface dynamic height fields. The in-situ data collection was part of the Coastal Transition Zone (CTZ) cold filament experiments of 1987 and 1988. The results of the 1987 cruise show a subsurface maximum in the correlation coefficient between AVHRR SST and in-situ temperature at depth for all three phases of the cruise which is attributed to the temf>oral offset between the satellite image and the data collection. The results of the 1988 cruise show maximum correlations at the surface with significant correlations at the 95% level of confidence to about 130 - 150 m depth, with positive correlations to 310 - 350 m depth. Comparing the results of the 1987 and 1988 cruises shows that the offshore filament was much stronger both horizontally and venicallv for the latter cruise.
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