Earth Science for Kids: Weather - Wind
Start studying Earth science meteorology quiz #2. Learn vocabulary What type of relationship is this? (temperature Why does moist air lower the air pressure than dry air? . The greater the pressure gradient the ______ the wind. stronger. Mrs. Deringer. Take the Air Pressure Quiz There would be more air pressure on you if you were__________________. (a) on the roof of a tall (b) wind vane. Questions on Quiz #1 will come from topics on this study guide and material on the What relationship is there between the rate of pressure decrease and air dew point temperature (typical values for Tucson), wind direction and speed.
This low pressure zone is also referred to as the inter-tropical convergence zone ITCZas air converges here from surrounding areas, drawn by the low pressure.
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The air is then carried up by powerful convection currents that cause severe thunderstorms in this region. Places in this zone receive precipitation over days of the year. Air rises above the equator, and when it reaches the troposphere, it starts flowing towards the poles. The air also loses heat through radiation. Upper air convergence and cooling, together, causes the air to subside over the sub-tropics.
Atmospheric Pressure and Wind Chapter Exam
This descending air creates the sub-tropical high pressure belts. This is a zone where two wind systems converge-the Prevailing Westerlies and the Polar Easterlies. The Westerlies being warmer, is forced to rise over the cold polar air. This rising air creates this area of low pressure. This is a zone of storms caused by the powerful uplift of air.
BBC Bitesize - GCSE Geography - Atmosphere and climate - Edexcel - Revision 1
The polar high pressure belts are found over the north and south poles. In these regions the solar energy intercepted by the surface of the Earth is very low, leading to low terrestrial radiation. In the northern hemisphere, the winds flow to the right and are called northeast trade winds.
In the southern hemisphere the winds flow to the left and are called the southeast trade winds. This is down to the Coriolis force and friction. The Ferrel cell The Ferrel cell occurs at higher latitudes between 30 degrees and 60 degrees N and 30 degrees and 60 degrees S: Air on the surface is pulled towards the poles, forming the warm south-westerly winds in the northern hemisphere and north-westerly winds in the southern hemisphere.
These winds pick up moisture as they travel over the oceans. At around 60 degrees N and 60 degrees S, they meet cold air, which has drifted from the poles.
METR Quiz Prospectus
The warmer air from the tropics is lighter than the dense, cold polar air and so it rises as the two air masses meet. This uplift of air causes low pressure at the surface and the unstable weather conditions that are associated with the mid-latitude depressions. Much of our wet and windy weather in the UK is determined by this.
The Polar cell At the poles, air is cooled and sinks towards the ground forming high pressure, this known as the Polar high. It then flows towards the lower latitudes. At about 60 degrees N and S, the cold polar air mixes with warmer tropical air and rises upwards, creating a zone of low pressure called the subpolar low.
The boundary between the warm and cold air is called the polar front. It accounts for a great deal of the unstable weather experienced in these latitudes.