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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.
Why do the Western Ghats cause orographic rain?
As the summer (wet) monsoons approach the West Coast of India, they rise up the western Ghats (mountains) and the air cools. This cool air is less able to hold moisture and it is released as rainfall. This is called OROGRAPHIC RAINFALL.
What are the three key characteristics of a physiographic region?
There are mountains, rivers, plains, rolling hills, and low-lying coastal lands. When scientists try to categorize regions based on their physical characteristics, we get the development of physiographic regions. A physiographic region has a distinct type of landscape, landforms, rock type, and evolutionary history.
What are the basic characteristics of core regions according to the core periphery model?
According to the core/periphery model, what are the basic characteristics of core regions? An abstract area or real place where economic power, population, and wealth are concentrated; sometimes described as an industrial, heartland, or metropolitan centre. periphery regions?
Where does Convectional precipitation occur in Canada?
The slight summer maximum in rainfall is due to convectional precipitation. This region includes Ontario and Quebec also parts of Nova Scotia and New Brunswick.
What is needed for precipitation to occur?
For precipitation to happen, first tiny water droplets must condense on even tinier dust, salt, or smoke particles, which act as a nucleus. … If enough collisions occur to produce a droplet with a fall velocity which exceeds the cloud updraft speed, then it will fall out of the cloud as precipitation.
What is required to produce precipitation?
Particles of dust or smoke in the atmosphere are essential for precipitation. These particles, called “condensation nuclei,” provide a surface for water vapor to condense upon. This helps water droplets gather together and become large enough to fall to the Earth.
What events need to happen before precipitation occurs quizlet?
what is needed for precipitation to occur? cloud droplets or ice crystals must grow heavy enough to fall through the air. one way that clouds droplets grow is by colliding and combining with other droplets. how is snowfall measured?
What are the five different types of precipitation quizlet?
The five most common types of precipitation include rain, sleet, freezing rain, hail, and snow.
Which of these is a source of precipitation?
The source of precipitation is water vapor, which is always present in the atmosphere in varying amounts, although it makes up less than 1% by volume. However, the water vapor in the air must be cooled to allow water to be condensed into cloud droplets. These droplets then grow to form precipitation particles.
What ocean surface characteristics are required for the intensification of storms into hurricanes and the maintenance of hurricanes?
What ocean surface characteristics are required for the intensification of storms into hurricanes and the maintenance of hurricanes? Hurricanes form only over deep water layers with surface temperatures in excess of 27oC (81oF) as hurricane energy is derived from latent heat release and associated evaporation of water.
What are the features of weather?
Humidity, air temperature and pressure, wind speed and direction, cloud cover and type, and the amount and form of precipitation are all atmospheric characteristics of the momentary conditions we call weather. The sun is ultimately responsible for the weather.
What are the factors that affect humidity?
Humidity depends on the temperature and pressure of the system of interest. The same amount of water vapor results in higher humidity in cool air than warm air. A related parameter is the dew point. The amount of water vapor needed to achieve saturation increases as the temperature increases.
What are four factors that interact to create weather conditions?
Although many factors combine to influence weather, the four main ones are solar radiation, the amount of which changes with Earth’s tilt, orbital distance from the sun and latitude, temperature, air pressure and the abundance of water.
What is orographic type of rainfall?
Orographic precipitation is defined as snow, rain, or other precipitation, which is formed when moist air is lifted as it moves over a range of mountains. As the air rises and cools, the orographic clouds form and serve as the precipitation source, where most falls upwind of the mountain ridge.
What is relief or orographic 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 type of rainfall occurs in India?
