Weather and Climate Archives - Page 2 of 4 - Free ZIMSEC & Cambridge Revision Notes

Convergence/Cyclonic/Frontal/Depression rainfall

By garikaib|2025-02-12T09:32:56+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Zimbabwe receives most of its rainfall from the ITCZ. Image by Aljezeera. ZIMSEC O Level Geography Notes: Frontal/ Cyclonic/Convergence Rainfall

This is also know as frontal or cyclonic or depression rainfall.
Cyclonic rainfall occurs in the temperate latitudes and is […]

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The Weather Station

By garikaib|2025-02-12T09:04:04+02:00February 12th, 2025|O Level Geography, Weather and Climate|

A typical weather station. Image by Stanbachonline. ZIMSEC O Level Geography Notes: Weather Station

-A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather […]

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Prevailing Winds in Southern Africa

By garikaib|2025-02-12T09:22:01+02:00February 12th, 2025|O Level Geography, Weather and Climate|

The Harmattan. Image by Kafkaesqublog ZIMSEC O Level Geography Notes: Prevailing Winds in Southern Africa

The eastern parts of Zimbabwe about 200km from the port of Beira and on average Zimbabwe is about 400km from the Indian Ocean, the closest ocean to the country.
Due to its proximity to the […]

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Temperature

By garikaib|2025-02-12T09:05:32+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Six's thermometer Six’s thermometer ZIMSEC O Level Geography Notes: Temperature

The daily maximum and minimum temperatures are measured using Six’s thermometer (pictured above).
It was invented by James Six a British scientist hence the name Six’s thermometer.
It is also known as the Maximum and Minimum thermometer.
It is housed in a Stevenson’s screen.
Diurnal […]

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The rain-shadow effect

By garikaib|2025-02-12T09:26:09+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Sem-arid conditions in Save Valley are due to the Rain-shadow effect. Image by Youth Delegates ZIMSEC O Level Geography Notes: Rain Shadow Effect

We have already looked at the formation of relief rainfall elsewhere. The […]

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Stevenson’s screen

By garikaib|2025-02-12T09:07:02+02:00February 12th, 2025|O Level Geography, Weather and Climate|

An open Stevenson screen showing the instruments it houses. Image by Hubhomedesign. ZIMSEC O Level Geography Notes: Stevenson Screen

A Stevenson screen is a prominent feature on most weather stations.

It is used to house weather instruments, for example the […]

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Weather symbols/ Synoptic Charts

By garikaib|2025-02-12T09:28:18+02:00February 12th, 2025|O Level Geography, Weather and Climate|

weather-min

ZIMSEC O Level Geography Notes: Weather Symbols and Synoptic Charts

After weather measurements have been taken at weather stations
they are then plotted onto synoptic charts.
These charts make use of special symbols as a form of pre-agreed shorthand that is used to show the weather conditions at a given place at a […]

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Humidity

By garikaib|2025-02-12T09:08:25+02:00February 12th, 2025|O Level Geography, Weather and Climate|

Wet and dry bulb thermometer. Image by TradeIndia ZIMSEC O Level Geography Notes: Humidity

-a quantity representing the amount of water vapor in the atmosphere.

It is measured using a hydrometer.
The wet and dry bulb thermometer is also known as a psychrometer.
Weather satellites can […]

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People and Weather

By garikaib|2025-02-12T09:30:16+02:00February 12th, 2025|Notes, O Level Geography, Weather and Climate|

People and Weather. Image via CNN. ZIMSEC O Level Geography Notes: People and Weather

The earth’s climate and weather conditions have been changing constantly throughout the earth’s Geological Timescale.
This has in turn had an impact on people’s cultures, history and current economical and social […]

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Pressure

By garikaib|2025-02-12T09:09:34+02:00February 12th, 2025|O Level Geography, Weather and Climate|

An aneroid barometer. Image imgkid. ZIMSEC O Level Geography Notes: Pressure.

-is the pressure exerted by the weight of air in the atmosphere of Earth. It is measured in millibars. It is measured using an instrument known as a barometer. There are two different types of […]

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February 2025