Without an atmosphere, Earth's climate would be like that of the moon: Very hot in the sun and very cold everywhere else. The ocean's effect is important, but not as much.
Without an atmosphere, Earth's oceans would have evaporated by now.
That is an interesting question.
which has a stronger effect on climate: the atmosphere or ocean?
2 answers
The stronger influence if the effect of the tilt of the Earth in relation to Earth's orbit. This is what caueses Seasons.
The ocean , and the heating of the oceans by the Sun, brings much water vapor to land masses, we divide the Earth up into climate zones, based mainly on temperature and rainfall.
The ocean , and the heating of the oceans by the Sun, brings much water vapor to land masses, we divide the Earth up into climate zones, based mainly on temperature and rainfall.