Why Does It Rain?
Why does it rain? Weather is probably the second most significant and powerful feedback cycle in the solar system. We’ve known for quite a while that weather plays an important role in how we live. How much rain do we need? When will it rain next? All these questions revolve around our understanding of the interaction between the atmosphere, cloud, and the ground.
The question of “why does it rain?” has been addressed many times. First we have to determine what causes the rainfall – clouds, precipitation, or lapse of atmospheric pressure. In this article we’ll concentrate on the precipitation.
In the absence of clouds, the precipitation is usually concentrated in short bursts, called rain storms. Cloudiness can be a good thing, if there is a lot of cloud cover. But the sun can melt ice and water droplets, which can combine to produce severe precipitation. In most regions, cloudiness or complete cloudiness is not a reliable cue for rainfall.
A second cause of rainfall is referred to as “condensation”. This term refers to the frozen precipitation that forms on the surfaces of land and ocean. The colloquial term “icycling” describes how rain beads, snow, and ice crystals form. These forms can change in size and thickness significantly during a single precipitation event.
The hydrological cycle associated with rainfall provides another reason why it rains. In the absence of clouds, a high pressure area would prevent precipitation from reaching the surface. Instead, a low-pressure area would prevail. As the high pressure area sinks, the relative humidity (RH) increases. The increase in humidity is what causes evaporative cooling, which is the result of water vapor being replaced by clouds.
Precipitation is also affected by other factors, such as temperature and relative humidity. When temperatures are cold, clouds tend to block the sun. This causes fewer rainfall events. Relative humidity is affected by the temperature of the air surrounding the clouds. Warm air tends to hold more water vapor than cool air, which leads to more precipitation. Cold air tends to moisten the surrounding air, reducing the amount of precipitation that reaches the ground.
The final factor that helps us understand why it doesn’t always rain is evaporation. Water that evaporates from a surface will fill in a drop in the reservoir. If there are no rain barrels to capture this water, then the water will simply run off into the environment. When rain falls, it fills up these water barrels. At the end of the day, all of the water in the rain barrels is collected. If we do not have a reliable way to capture and purify this water, it will simply run off into the environment and potentially poison our lakes and rivers.
Learning why does it rain is a great way to reduce your exposure to this natural phenomenon. One way is to install a rain barrel. Another is to purchase an affordable water barrel that you can use year round. And finally, simply having a clear mind can help you to better understand why the rain does not fall. Perhaps you will be inspired to create your own barrel or improve an existing barrel that you currently have.
As mentioned earlier, these questions are very easy for most people to answer given the right circumstances. This is one of those situations. The next question, though, is where do you find these answers? There are many answers available on the internet, but I would like to focus on the first two reasons why it does not rain more often.
The first reason why we do not usually see falling rain is because of atmospheric conditions. If you live in a warm climate, chances are that the clouds are too large and they block the sun’s rays. A cloud can weigh as much as 15ft., so if you are out in the woods or enjoying a picnic, chances are you will not be able to enjoy a nice fall rain. However, if you are stuck out in the country, you may be able to enjoy sunny days.
The second question we want to address is the lack of available storage space. Most of us have rain barrels but these require storage space. If you don’t have a garage or shed to put it in, you can’t put them in your backyard. This is the primary reason why there is no such thing as “why does it rain?”