5 Written questions
5 Matching questions
- What are Trade Winds?
- What are the rules for isopleths?
- Describe friction forces.
- Describe the Subtropical High Pressure area.
- a 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.
- b Equal wind speed.
- c The Subtropical High Pressure area consists of Westerlies, the Bermuda High, the Azores High, and the Pacific High.
- d 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.
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.
5 Multiple choice questions
- Primary circulation entails global circulation - the mass movement of air all over the globe.
- Equal rainfall.
- The four factors that affect atmospheric circulation are as follows: the Coriolis Effect, gravity, friction forces, and changes in air pressure.
- 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.
The Jet Stream is a relatively narrow corridor of very strong winds near the tropopause.
5 True/False questions
Isobar? → Equal wind speed.
Describe the Coriolis Effect. →
The Coriolis Effect deflects winds fro ma straight line in relation to the Earth's rotating surface. Earth's rotation adds the Coriolis Effects and a "twist" to air movements. In the Northern Hemisphere, winds are deflected to the right, or the east. In the Southern Hemisphere, winds are deflected to the left, or the west.
What are doldrums? → 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.
Describe the Polar High Pressure area. → The Subpolar Low Pressure area consists of the Aleutian Low, the Icelandic Low, and the Polar Front.
What does tertiary 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.