Rain occurs through the process of coalescence, where a mass of water droplets gathers around cloud condensation nuclei to saturate the atmosphere and allow condensation and precipitation to take place. This process is driven by three primary lifting mechanisms that cause the upward movement of air.Know More
Low atmospheric temperatures and high relative humidity results in air saturation, where clouds begin to thicken and moisture particles fall to the ground as precipitation. Aside from rain, other types of precipitation include snow, sleet, freezing rain, hail and virga, which is a type of rain that vaporizes before it comes into contact with the ground.
Rain is a common meteorological phenomenon that occurs almost everywhere on Earth. The three lifting mechanisms that influence rain formation include frontal lifting, orographic lifting and convective lifting.
Frontal lifting occurs when a warm, less dense air mass meets a cold, denser air mass. The warm air is lifted up over the cold air, causing the warm air to cool down, form clouds that gather vast amounts of water vapor, which eventually fall as frontal rain. Orographic lifting occurs in mountainous regions where moist air rises to overcome the high elevation. The rain that falls via this process is known as orographic rain. Convective lifting is the result of unequal solar heating on the planet's surface. Warm air generally moves up and cold air sinks to the ground. The rising column of air expands, cools down, forms clouds, condenses and falls to the ground as convective rain.Learn more about Rain
Some examples of condensation include the water that gathers on a bathroom mirror after a hot shower and the water that collects on grass as dew. Condensation is the process where gas molecules slow down and come together to form a liquid.Full Answer >
Weathering, both mechanical and chemical, is likely to take place more rapidly in wetter climates. Mechanical and chemical weathering require water to break up rocks into fragments or chemically alter minerals, respectively.Full Answer >
Relief rain occurs when warm, moist air ascends along the slope of a mountain. The air then condenses and rainfall occurs on the windward side. The leeward side of the mountain receives very little rainfall. This is called the rain shadow region.Full Answer >
Rain brings a multitude of benefits to the earth, including watering wild plants and crops, humidifying the air, creating streams and rivers, replenishing the water table and creating healthy negative ions. Perhaps the most important benefit of rain is its redistribution of fresh water in the water cycle.Full Answer >