2 ms·

I think this needs a lot more scrutiny. What did we really know about the ocean in 1899, which is when part of the data starts? Are they just using mathematica

• gumby 4y ago
  The British admiralty has maintained data on ocean currents and temperatures since the mid 19th century. They operated a number of scientific studies (cf Darwin on the Beagle). I'm mildly surprised the time series starts as late as 1870.