Statement I: This statement is incorrect. It says that the temperature difference between land and oceans is greater in summer than in winter, which is actually the opposite. In winter, land cools down faster than the ocean, and the ocean stays warmer, creating a bigger temperature difference between land and water. In summer, land heats up faster than the ocean, so the temperature difference is smaller.

Statement II: This statement is correct. Water has a higher specific heat capacity than land, meaning it takes more heat to raise the temperature of water by the same amount compared to land. This is why the ocean heats up and cools down more slowly than land.