5 Written questions
5 Matching questions
- What does secondary circulation in the atmosphere entail?
- What is the ITCZ?
- What does primary circulation in the atmosphere entail?
- What are the rules for isopleths?
- Explain pressure gradients.
- a Secondary circulation consists of the migration of high and low pressure cells. Major pressure cells move from high pressures to lower pressures, bringing with them fluctuations of temperature and moisture, causing climate.
- b The ITCZ stands for the Intertropical Convergence Zone, which is the area along the equator where a discontinuous series of thunderstorms occurs, due to the uplift caused by the convergence of winds and solar heating of the ground along the equator.
Pressure gradients drive air from an area of high pressure to an area of low pressure, creating winds.
- 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.
- e Primary circulation entails global circulation - the mass movement of air all over the globe.
5 Multiple choice questions
- Doldrums refers to a broad east-west belt of light winds that occur along the equator where the Trade Winds from the northern and southern hemispheres converge.
- Equal wind speed.
- The wind direction is always reported as the direction from which the wind is blowing. Winds which blow from the west, for example, are westerlies. They blow towards the east. Winds which blow from the south are called southerlies. They blow towards the north.
- 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.
- An isopleth is a line on a weather chart that represents an equal value of some quantity.
5 True/False questions
What are the four major pressure areas on Earth? → The Polar High Pressure consists of polar easterlies and the Antarctic High pressure area.
What four factors affect atmospheric circulation? → 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.
What do high pressure cells tend to do? → Low pressure cells tend to ascend and converge.
Isoheight or contour line is what? → Equal temperature.
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.