Yes, the increased amount of water would slow down the rotation. Couldn’t it also slow down the planet’s forward motion? Then the planet steps down to a lower circle around the sun, and then we get hotter. And time goes slower because of increased gravitation of the sun.
No, But the melting of the ice caps would make the earth rotate slower (think rotating ice skater spreading her arms), thereby lengthening the day.
Interesting point.
Yes, the increased amount of water would slow down the rotation. Couldn’t it also slow down the planet’s forward motion? Then the planet steps down to a lower circle around the sun, and then we get hotter. And time goes slower because of increased gravitation of the sun.