can any one please explainwhat is a cyclonic rainfall
Answers
Cyclonic or Frontal rain: This type of rainfall occurs when warm and cold air meets each other. Since warm air is lighter, it rises above the cold air. The rising air is then cooled beyond the saturation point resulting in heavy rainfall. Such rainfall lasts only for few hours.
Answer:
Answer-Cyclonic Rain is caused by cyclonic activity and it occurs along the fronts of the cyclone.It is formed when two masses of air of different temperature,humidity and density meets. For example meeting of moisture laden warm tropical wind with a polar rain mass.
Explanation:
Convectional Rainfall – Major Characteristics
The air on getting heated becomes light and rises in convection currents.
As the air rises, it expands and drops the temperature and subsequently, condensation takes place and cumulus clouds are formed.
Heavy rainfall with lightning and thunder takes place which does not last long.
Such rain is usually in the summer or the hotter part of the day.
This type of rainfall generally takes place in the equatorial regions and internal parts of the continents, predominantly in the northern hemisphere.
This rainfall is usually associated with hail and graupel
Orographic Rainfall – Major Characteristics
When the saturated air mass comes across a mountain, it is forced to rise.
The rising air expands, eventually, the temperature falls, and the moisture gets condensed.
The principal characteristic of this type of rain is that the windward slopes get more rainfall.
After giving rain on the windward side, when these winds reach the other slope, they drop away, and their temperature increases. Then their ability to take in moisture increases and hence, these leeward slopes remain dry and rainless.
The region situated on the leeward side is known as the rain-shadow area.
Cyclonic Rainfall – Major Characteristics
Cyclonic activity causes cyclonic rain and it occurs along the fronts of the cyclone.
When two masses of air of unlike density, temperature, and humidity meet then it is formed.
The layer that separates them is known as the front.
A warm front and the cold front are the two parts of the front.
At the warm front, the warm lighter wind increases slightly over the heavier cold air.
As the warm air rises, it cools, and the moisture present in it condenses to form clouds
This rain falls gradually for a few hours to a few days.
Types of Rainfall based on Intensity
The types of rainfall based on intensity can be classified as:
Light rain – Rate of rain varies between 0 to 2.5 millimeters
Moderate rain – Rate of rain varies between 2.6 millimeters to 7.6 millimeters
Heavy rain – Rate of rain is beyond 7.6 millimeters
Types of Rainfall (UPSC Notes)