Which statement best describes how temperature humidity and pressure vary within an air mass?
6 Cards in this Set
|Which describes how temperature, humidity, and pressure vary within an air mass?||Temperature, humidity,and pressure are basically the same all through an air mass.|
|Low air pressure systems are usually associated with||cloudy, wet weather|
What determines the temperature and humidity of an air mass?
Air masses have fairly uniform temperature and moisture content in horizontal direction (but not uniform in vertical). Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the the underlying surface properties where they originate.
How is temperature related to air pressure and humidity?
As air temperature increases, air can hold more water molecules, and its relative humidity decreases. High relative humidity of the air occurs when the air temperature approaches the dew point value. Temperature therefore directly relates to the amount of moisture the atmosphere can hold.
Do air masses have the same temperature and humidity?
An air mass has roughly the same temperature and humidity. Air masses form over regions where the air is stable for a long enough time. The air takes on the characteristics of the region. Air masses move when they are pushed by high level winds.
What two characteristics define an air mass?
Temperature and humidity are two characteristics used to classify air masses.
What is relationship between temperature and pressure?
The pressure of a given amount of gas is directly proportional to the temperature at a given volume. When the temperature of a system goes up, the pressure also goes up, and vice versa. The relationship between pressure and temperature of a gas is stated by the Gay-Lussac’s law.
Which conditions are usually the effect of a low air pressure system?
A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.
What causes high and low pressure?
Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.