EVERYDAY SCIENCE

Detailed explanation-1: -As average temperatures at the Earth’s surface rise (see the U.S. and Global Temperature indicator), more evaporation occurs, which, in turn, increases overall precipitation. Therefore, a warming climate is expected to increase precipitation in many areas.

Detailed explanation-2: -Simply put, precipitation amounts are increasing as temperatures rise because warm air holds more water vapor: a 1°F rise in temperature equals as much as a 4% increase in atmospheric water vapor. Other factors can contribute to rainfall, including El Niño and La Niña .

Detailed explanation-3: -As the warm air rises, water vapor in that air condenses and cools. As it does so, clouds form, eventually leading to precipitation. A similar thing happens with warm fronts. A warm front approaching a colder air mass will rise on the back of the dense mass of cold air.

Detailed explanation-4: -A decrease in the daily precipitation area is an indication of profound changes in the hydrological cycle, where the global rate of precipitation is balanced by the global rate of evaporation. This decrease was accompanied by increases in total precipitation, evaporation, and wet-day mean precipitation.

Detailed explanation-5: -The Arctic region is warming two to three times faster than the global mean, intensifying the hydrological cycle in the high north. Both enhanced regional evaporation and poleward moisture transport contribute to a 50–60% increase in Arctic precipitation over the 21st century.