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Comparison of Computed Geostropic Currents and ADCP

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Presentation on theme: "Comparison of Computed Geostropic Currents and ADCP"— Presentation transcript:

1 Comparison of Computed Geostropic Currents and ADCP
LT David Blencoe 21 March, 2001

2 CALCOFI Line 67 Monterey Bay CALCOFI Line 67

3 Actual Ship Track Data Collection: Dec, 2000
All CTD casts went to depth of 1000 m. Data discarded because depth of CTD cast was only 242 m

4 T-S Diagram Large Variation of Salinities in surface water
Colder, Deeper water transporting saltier water poleward.

5 ADCP Currents

6 Temp & Salinity Plots

7 Density Anomaly

8 Computing Geostropic Currents
 v = -1/f (p/x) (-1/)(p/x) = fv Specific Values:  = density f = 2sin  = e-5 s-1  = latitude

9 Computing Geostropic Currents, (Contd.)
p/x = pressure along line D = 0zdp where:  = 1/, specific volume anomaly z = reference level/level of no motion (1000dbar) Making: v= D 2sin  x

10 Geostropic Currents

11 Any Questions?


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