5 Written Questions
5 Matching Questions
- How is air pressure measured?
- Describe land-sea breezes.
- What are the rules for isopleths?
- Describe the Equatorial Low Pressure.
- Isotherms are equal to what?
- a Isopleths must be continuous and cannot intersect other isopleths. All values above the isopleth should be on one side of the line and all values below an isopleth should be on the other side of the isopleth. The position of the isopleth should be interpolated in between points of known data. They should choose a contour interval and start at an area of high or low values.
Land-sea breezes are driven by the thermal inertia of water. When land and sea receive the same amount of insolation, the land heats up faster than the water. This temperature gradient causes winds to blow. At night, radiational cooling cools the land faster than the water so that the temperature gradient makes a wind blow from land to sea. These breezes also occur for large bodies of water, such as the Great Lakes.
- c A barometer can measure changes in air pressure. The two types of barometers are the mercurial barometer, which is more accurate but less easily transportable, and the aneroid barometer, which is less accurate but more portable.
- d Equal temperature.
- e The Equatorial Low Pressure area occurs along the Intertropical Convergence Zone (ITCZ) and is the area where the Trade Winds and doldrums occur.
5 Multiple Choice Questions
- The four factors that affect atmospheric circulation are as follows: the Coriolis Effect, gravity, friction forces, and changes in air pressure.
- Trade Winds blow out of the equator side of the anticyclones. In the Northern Hemisphere, they are the Northeasterly Trade Winds. They are the most persistent winds in the world, blowing in the same direction about 80% of the time.
Friction forces drag winds as they move across various surfaces. This effect decreases with height above a surface, and causes air spiraling out of a high pressure cell to turn clockwise (anticyclone). Air spiraling out of a low pressure cell turns counter-clockwise (cyclone). NOTE that in the Southern Hemisphere, this effect is in reverse: high pressures produce cyclones, and low pressures produce anticyclones.
- Primary circulation entails global circulation - the mass movement of air all over the globe.
- Low pressure cells tend to ascend and converge.
5 True/False Questions
Explain pressure gradients. → Air pressure tendency is important, along with the air pressure reading on a barometer. Falling air pressure, which corresponds to a decrease in the length of mercury in the column on a mercurial barometer, generally indicates stormy weather.
What is the ITCZ? →
The Jet Stream is a relatively narrow corridor of very strong winds near the tropopause.
What does secondary circulation in the atmosphere entail? → Tertiary circulation is the movement of local high and low pressure cells, and parcels of air will cause local weather patterns, such as the weather patterns of a coastal city that is influenced by the body of water nearby.
Explain air pressure tendency. → Air pressure tendency is important, along with the air pressure reading on a barometer. Falling air pressure, which corresponds to a decrease in the length of mercury in the column on a mercurial barometer, generally indicates stormy weather.
Isohyet? → Equal rainfall.