From the bureau of meterology:
“Clouds have their origins in the water that covers 70 per cent of the earth’s surface. Millions of tons of water vapor are evaporated into the air daily from oceans, lakes and rivers, and by transpiration from trees, crops and other plant life.”
“As this moist air rises it encounters lower pressures, expands as a result, and in doing so becomes cooler. As the air cools it can hold less water vapor and eventually will become saturated. It is from this point that some of the water vapor will condense into tiny water droplets to form cloud (about one million cloud droplets are contained in one rain-drop). Thus, whenever clouds appear they provide visual evidence of the presence of water in the atmosphere.”
So…visual evidence of the presence of water in the atmosphere below:
Filed under: