How is convergence different from frontal wedging?
Answer: Convergence lifting- This is a kind of lifting of air above the ground due to the horizontal inflow of air because of which no place left for air to go except above hence moves up. Frontal wedging- This again is a kind of air lifting in which the air moves up due to meeting of warm air with cool air.
How is frontal lifting different from convergence?
– Frontal Lifting is when less dense warm air is forced to rise over cooler, denser air as a weather fronts move. – Convergence lifting is when air near the surface flows together and is pushed upward when it is squeezed together.
What are the 4 lifting mechanisms?
– There are four lifting mechanisms that form clouds: Orographic Lifting, Convection, Convergence, and Updraft.
What causes Convectional lifting?
Convectional lifting is associated with surface heating of the air at the ground surface. The leading edge of the latter air mass acts as an inclined wall or front causing the moist warm air to be lifted. Of course the lifting causes the warm moist air mass to cool due to expansion resulting in saturation.
What is an example of orthographic lifting?
Examples of such locations are the west side of the Cascades and Sierra Nevada range in the western U.S. In some situations the wind will blow from another direction. Orographic lifting will occur in the Rocky Mountains on the east side of the range when the wind is from the east.
What is the best description of an orographic uplift?
Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation.
Which locations are impacted by the orographic effect?
The geographic location of mountain ranges is the most important factor causing midlatitude aridity. The extensive dry regions of Asia (Turkestan east to the Gobi Desert of China) and the Great Basin Desert of North America are the result of orographic effects on the flow of air masses (Manabe and Broccoli, 1990).
Where is Convectional rainfall most common?
Convectional rainfall is widespread in areas where the ground is heated by the hot sun, such as the Tropics. This is why areas, such as the Amazon Rainforest, experience heavy rainfall most afternoons.
What is Convectional rainfall also called?
Convectional rainfall is also called 4 o ‘clock rain: Convectional rainfall is the result of high rate of evaporation.
Why is it called 4 o’clock rain?
Answer. Convectional rainfall is also called 4 o ‘clock rain: Convectional rainfall is the result of high rate of evaporation. Then condensation takes place and rain falls. At mid day , when the sun is at the highest position, the temperatures rise at the equator.
What is a relief rainfall?
Relief rainfall occurs when warm moist air from the Atlantic Ocean rises up over mountains. When the warm air rises, it cools and condenses to form clouds, which bring rain. Once the air has passed over the mountains, it descends and warms. This creates drier conditions known as a rain shadow .
Why does the UK get lots of frontal rainfall?
Frontal rainfall When a cold polar air mass meets a warm tropical air mass they do not mix – they form fronts. The colder air mass is heavier than the warmer air mass, therefore the lighter, warmer air rises over the top of the heavier, colder air. Rain occurs along the front.
Which type of rainfall is called relief rainfall?
Relief Rainfall Relief or orographic rain is formed when air is forced to cool when it rises over relief features in the landscape such as hills or mountains. As it rises it cools, condenses and forms rain. The highest rainfall totals of over 1,600 mm per year occur in the mountain areas along the west coast.
What is the scientific name for rain?
(“Nimbus” comes from the Latin word for “rain.”) Two examples are the nimbostratus or cumulonimbus clouds. Nimbostratus clouds bring continuous precipitation that can last for many hours. These low-level clouds are full of moisture.
What are heavy rains called?
What is another word for heavy rain?
| downpour | rainstorm |
|---|---|
| cloudburst | drencher |
| inundation | storm |
| torrent | monsoon |
| torrential rain | heavy shower |