The difference between relative humidity and humidity ratio is pretty easy to figure out— and explains the humidity percentage you see on your phone. Types of Humidity Absolute Humidity This term is used to describe the actual amount of water vapor that is saturating the air.
Relative Humidity Again, this is the type of humidity that meteorologists are typically referring to on their weather reports. Specific Humidity This term is used as a ratio of the amount of water vapor in the air to the amount of dry air in the area. Author abonet. Previous Post. Next Post. Tips for How to Care for Old Books. Leave a Reply Cancel reply Your email address will not be published. Leave this field empty. View more. My Account. Username Password Remember me Login Lost your password?
Ideally, it is a cyclic process. The solar radiation in the air results n evaporation of water from the water bodies. This evaporation results in water vapour and gets mixed in the air. The air is already mixed with other gases and elements, the water vapour mixing with the atmosphere results in the overall weather condition of the place. If the solar radiation is more, or in other words, if the place experiences excessive heat, more evaporation happens. This result is more water vapour getting mixed in the air.
This increases the precipitation levels. In certain cases, you may experience excessive rainfall too. Have you ever noticed that whenever a place has more temperature, you may experience rain in the evening?
It is indeed a cyclic process that keeps the living beings intact. The body sweat happens which is a result of the humid conditions cools the body from the heat. Though the sweat is undesirable, it is what helps humans to survive excessive heat as well. Relative Humidity otherwise mentioned as RH is the ratio of water vapour present in the atmosphere. The ratio is measured against the water vapour that can be present in that given temperature.
Relative Humidity is measured in percentage and it gives the value for the place to experience more humid conditions. When talking about humidity, we are talking about the degree of moisture condition of the air. Humidity is the amount of water present in the air. To represent the ratio of the amount of moisture in the air, the definition of the air can be classified as follow:.
In general, the higher the PW, the higher the potential for very heavy rain from thunderstorms if they were to develop. However, another very important consideration is not only the amount of ambient moisture in a particular location, but also the amount of moisture advection and convergence which provides additional moisture to an area.
If significant, these added factors help explain why rainfall totals from thunderstorms can exceed actual PW values of the air in which the storms are occurring. The movement of thunderstorms, called propagation, also is very important in determining the actual amount of rainfall in any one location.
The slower the movement of thunderstorms, the higher the rainfall potential in one area. These examples show how relative humidity can be quite misleading. In general, assuming the dewpoint or absolute humidity does not change, the relative humidity will be highest in the early morning when the air temperature is coolest, and lowest in the afternoon when the air temperature is highest. While dewpoint is a more definitive measure of moisture content, it is the relative humidity that commonly is used to determine how hot and humid it "feels" to us in the spring and summer based on the combined effect of air temperature and humidity.
This combined effect is called the " Heat Index. In the winter, there is another index we use to determine how cold our bodies feel when we are outside.
This index combines the effect of the air temperature with the speed of the wind. When it is cold outside and the wind is blowing, the wind carries away heat from our bodies faster than if the wind was not blowing. This makes it feel colder to us. Therefore, the stronger the wind is in the winter, the colder it feels to us and the lower is the wind chill index. If the heat index is very high or the wind chill index is very low, then we must take safety measures to protect our bodies from possible effects of the weather, including heat exhaustion, sunstroke, and heat stroke in the summer, and frostbite in the winter.
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