3 ms·

Temperature differential creates hurricanes. If everything is warmer, it doesn't necessarily mean more hurricanes. Not really disputing what you're saying, just

• emn13 9y ago
  Since outer space is still cold, that temperature differential always exists. But to transfer heat, the system uses water vapor, and that is not relative. If the whole system is warmer (and still firmly below absurd extremes such as boiling point), then even though the differential to the rest of the planet may be the same, that does not mean the system will behave identically. Beyond the really fundamental and abstract "differential must exist" (which is true of any heat engine and is in any case always satisfied) I cannot find any reference to the notion that relative temperature (to the rest of the nearby weather?) is what matters. Various sources I find talk of absolute water temperatures in the 26-27 degrees centigrade range (of course these aren't 100% strict limits).