Florida Current Volume Transports from Voltage Measurements

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Science  18 Jan 1985:
Vol. 227, Issue 4684, pp. 302-304
DOI: 10.1126/science.227.4684.302


The volume transport of the Florida Current is determined from the motionally induced voltage difference between Florida and Grand Bahama Island. Simultaneous measurements of potential differences and of volume transport by velocity profiling have a correlation of 0.97. The calibration factor is 25± 0.7 sverdrups per volt, and the root-mean-square discrepancy is 0.7 sverdrup. The induced voltage is about one-half the open-circuit value, implying that the conductance of the sediments and lithosphere is about equal to that of the water column.