What is the Coriolis effect?

The Coriolis effect is the apparent deflection of moving air caused by the Earth's rotation. Deflection is to the right in the northern hemisphere and to the left in the southern.

Where is the Coriolis effect strongest and where is it absent?

The Coriolis effect is strongest at the poles. The effect is zero at the equator, which is why tropical cyclones cannot form there.

Name and describe the trade winds.

The trade winds blow from the subtropical highs towards the equatorial low. The flow arrives from the north-east in the northern hemisphere and the south-east in the southern.

Eduqas A-Level Geography A110QS

Coastal LandscapesLandscape

Topic overview The coast as a system: inputs, outputs, stores and transfers Sediment sources, sediment cells and dynamic equilibrium Tides, currents and wave types High and low energy coastal environments Fetch, wave refraction and wave reflection Lithology and structural geology at the coast Sub-aerial weathering and mass movement at the coast Marine erosion processes Cliffs, wave-cut platforms, geos and blowholes Headlands, bays and the cave to stump sequence Coastal transport and longshore drift Coastal deposition, flocculation and sediment sorting Beaches, spits and bars Tombolos, cuspate forelands and sandy coastlines Coastal sand dunes and aeolian processes Estuarine coastlines, tidal flats and salt marshes Coral reefs and mangrove coastlines Storms, seasons and sea level change Coastal processes and human activity Human impacts and coastal management

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Economic Growth and Challenge: ChinaContemporary theme

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Development in an African ContextContemporary theme

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Weather and ClimateContemporary theme

Topic overview Structure of the atmosphere The atmospheric heat budget Global atmospheric circulation and the tricellular model Pressure belts and planetary surface winds Oceanic circulation, continentality and altitude The world's major climate types The ITCZ and seasonal migration The monsoon climate The climate of the UK Air masses affecting the UK The jet stream and UK weather ENSO and short-term climate change Vulnerability, resilience and adaptive capacity Hazards of low- and high-pressure systems and their management Urban climates and air quality Climate change: shifting belts, tipping points and response

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Weather and Climate

Pressure belts and planetary surface winds

3 things to know
Component 3 Section B

Overview

Global pressure belts from the equator to the pole, pressure gradient and coriolis effect.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Name the global pressure belts from the equator to the pole.

Key term

Define a pressure gradient.

Key term

In which direction does air move between pressure belts at the surface?

Questions from this subtopic

Each one with the model answer underneath.

1
Name the global pressure belts from the equator to the pole.
Model answer
The belts run from the equatorial low to the subtropical high at about 30°. The sub-polar low at about 60° and the polar high complete the sequence.
2
Define a pressure gradient.
Model answer
A pressure gradient is the change in atmospheric pressure over distance. A steep gradient produces strong winds and a gentle gradient light winds.
3
In which direction does air move between pressure belts at the surface?
Model answer
Air moves from high pressure to low pressure at the surface. The movement is then deflected by the Coriolis effect.
4
What is the Coriolis effect?
Model answer
The Coriolis effect is the apparent deflection of moving air caused by the Earth's rotation. Deflection is to the right in the northern hemisphere and to the left in the southern.
5
Where is the Coriolis effect strongest and where is it absent?
Model answer
The Coriolis effect is strongest at the poles. The effect is zero at the equator, which is why tropical cyclones cannot form there.
6
Name and describe the trade winds.
Model answer
The trade winds blow from the subtropical highs towards the equatorial low. The flow arrives from the north-east in the northern hemisphere and the south-east in the southern.

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