Finished! Looks like this project is out of data at the moment!
Thanks everyone, PROJECT IS COMPLETE! (There will be some oddities while I collect the overall statistics.)
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Historical marine weather data, covering 70% of the Earth that is ocean, are a critical - and often only - means to quantify the ways the global ocean regulates climate over time.
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Banner illustration: Coming Aboard (detail), Painting, Oil on Board; by Lawrence Beall-Smith; 1943, Naval History and Heritage Command. See the artwork.