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[Pursuivant]

Originally Posted by dimlee

Just small amendment:
Surface air temp of +35...+40C is too high for oceans and open seas. I'd suggest maximum about +26C...+29C except Red Sea and may be some coastal areas.

You're right.

I was guessing at temperatures, but I was doing it by doing searches for temperatures for coastal cities, and choosing average summer high temperature (typically August), and winter low temperature (typically January).

So, my high temperature was based on the August high temperature for Tripoli, Libya, which is clearly too high once you get out to sea.

More realistically, for the summer Mediterranean, you'd want the summer high temperature for someplace like the Island of Lampadusa, which typically a balmy 29 *C in August. For the tropics, the same temperature seems about right.

FWIW, as of this writing, Sand Island (on Midway Island) currently has a temperature of 18 *C (but gets up to about 29 *C in August), Rabaul, New Guinea currently has a temperature of 27 *C, and Tarawa atoll in the Gilbert Islands currently has a temperature of 30*C.

Knock off a couple of a couple of degrees to reflect the fact that the world was cooler during the WW2 era, and a high of 26-29*C for warm ocean temperatures is spot on.