Why is the river water so cold?
Why is the river water so cold? Faster moving water molecules are more likely to escape into the atmosphere (evaporate) when they are at the surface of the liquid. As the water loses its fastest (hottest) molecules, the average kinetic energy goes down obviously, and the water gets colder.
Does rain make a lake colder?
Rain may have a cooling effect on the lake surface by lowering the near-surface air temperature, by the direct rain heat flux into the lake, by mixing the lake surface layer through the flux of kinetic energy and by convective mixing of the lake surface layer.
Are rivers warmer at night?
Originally Answered: Why does river water get warmer at night? It doesn't. Because the air is cooler at night and water tends to hold it's temperature better than air, the water will feel warmer due to the fact that your body adapted to the cooler air that surounded it before you stuck your hand in the water.
Why are lakes calm in the morning?
During the early morning hours, the land and the water start out at roughly the same temperature. On a calm morning, a given pressure surface will be at the same height above both the land and water. A few hours later, the sun's energy begins to warm the land more rapidly than the water.