What best describes how temperature humidity and pressure vary within an air mass?
Temperature and humidity vary, but pressure does not. Temperature, humidity, and pressure are basically the same all through an air mass. Temperature at the border of an air mass is always higher than in the middle. Humidity makes the pressure in an air mass increase.
How does high and low pressure affect weather?
Atmospheric pressure is an indicator of weather. When a low-pressure system moves into an area, it usually leads to cloudiness, wind, and precipitation. High-pressure systems usually lead to fair, calm weather.
What weather is associated with high pressure?
A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere. These bring sunny skies. A high pressure system is represented as a big, blue H.
What is the movement of air from high pressure areas to low pressure areas?
The Movement of Air. Movement of air caused by temperature or pressure differences is wind. Where there are differences of pressure between two places, a pressure gradient exists, across which air moves: from the high pressure region to the low pressure region.
Is air rising or sinking in areas of high pressure?
Well, high pressure is associated with sinking air, and low pressure is associated with rising air. The opposite occurs with high pressure. Air is moving away from the high pressure center at the surface (or “diverging”) so as a result, air from above must sink to take its place.
What are two main factors that determine the movement of air?
The movement of air is mainly caused by the differences in pressure and temperature. Warm air is lighter and it rises upwards, meanwhile, cold air is denser and hence it moves down to replace the warm air.
What are the factors influencing speed and direction of wind?
The main factors that affect wind direction and speed are: the pressure-gradient force, the Coriolis force and friction. These factors working together cause the wind to blow in different directions and at different speeds.
Which two factors affect the wind and pressure system of an area?
The two factors that affect the wind and pressure of an area are:
- latitudes:At the higher latitudes the pressure is high and the air settle down.
- Temperature:When the temperature is high there will be low pressure and the air rises and when the temperature is low there will be low pressure and air settle down.
What are the factors affecting the wind?
Factors affecting Wind Movement
- Wind == horizontal movement of air.
- Currents == vertical movement of air.
- Winds balance uneven distribution of pressure globally.
- Winds help in transfer of heat, moisture etc.
- Sun is the ultimate force that drives winds.
- The wind at the surface experiences friction.
What are two factors that cause differences in wind speed?
There are two factors that cause differences in wind speed. They are differences in pressure and differences in altitude.