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Chapter S1
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FIGURE S1.1
Track of the HMS
Challenger
Expedition 1872–1876.
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FIGURE S1.2
Overturning circulation of the Atlantic Ocean according to Merz and Wüst (1923).
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FIGURE S1.3
Meteor
after refit.
Source: From Spiess (1928).
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FIGURE S1.4
Ekman repeating current meter.
Source: From Spiess (1928).