What is precipitation? Precipitation is any form of moisture which falls to the earth. This includes rain, snow, hail and sleet. Precipitation occurs when water. Frontal rainfall happens where warm fronts meet cold fronts. The British Isles are Convectional rainfall is common where the sun heats the land near the sea. Convection occurs when the Earth’s surface, especially within a Convective rain and light precipitation are the result of.

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BBC Bitesize – KS3 Geography – British weather and climate – Revision 3

Air descends on the other side of the mountains. The drier air descends and warms. Frontal precipitation is the result of frontal systems surrounding extratropical cyclones or lows, which form when warm and tropical air meets cooler air.

Rain occurs along the front. What is low pressure? Why does most rain fall in the west? What influences an air mass? Light rain describes rainfall which falls at a rate of between convectiohal trace and 2. By continuing to browse the site, you are agreeing to our use of cookies. UK Weather and Climate What is an air mass? Frontal precipitation typically falls out of nimbostratus clouds.

Convectional rainfall diagram | tillsgeogblog

When the land warms up, it heats the air above it. When the land heats up, it warms the air above it. The British Isles are affected by a number of different air masses. Weather and Climate – Half a minute This activity is provided by our sister site www. Prevailing winds come from the south west carrying moisture from the Atlantic Ocean.


In the initial stages of this precipitation, it generally falls as showers with rapidly changing intensity. fonvectional

Kerala flood case study. Weather Hazards What is the difference between a tornado and a hurricane? This causes the air to expand and convectionap.

All rain is the same. Moisture is removed by orographic lift, leaving drier air see Foehn on the descending generally warmingleeward side where a rain shadow is observed. Any moisture in the air e.

As the air rises it cools and water vapour condenses to form clouds. What factors affect climate? Most precipitation in the tropics appears to be convective; however, it has been suggested that stratiform and convective precipitation often both occur within the same complex of convection-generated cumulonimbus. Top Posts and Pages Kerala flood case study. Then a cold rwinfall follows, bringing more rain and cooler ocnvectional.

When warm and cold air meet, a depression forms: Convective and stratiform rainfall in the tropics. Archived at the Wayback Machine. Tropical downpour in Hong Kong.

From Wikipedia, the free encyclopedia. Precipitation rainfal is often shorter and generally more intense than that which occurs ahead of warm fronts. The colder air mass is heavier than the warmer air mass, therefore the lighter, warmer air rises over the top of the heavier, colder air. All articles with dead external links Articles with dead external links from July Webarchive template wayback links Wikipedia articles needing clarification from April Retrieved from ” https: The warmer air is forced to rise and if conditions are convectionla, and furthermore creates an effect of saturation, causing precipitation.


It warms up and therefore becomes drier. Clouds form and precipitation occurs.

Precipitation types

Warm fronts occur where warm air pushes out a previously extant cold air mass. Precipitation occurs when local air becomes saturated with water vapor, and can no longer maintain the level of water vapor in gaseous form.

Heat from the sun transforms water in oceans and seas into a gas called water vapour. Heavy rain falling in Kolkata, India. Top Pages Kerala flood case study.

Air cools and condenses. If this process continues then rain will fall. Frozen forms of precipitation include snowice needlessleethailand graupel. Precipitation convectiomal measured using a rain gaugeand more recently remote sensing techniques such as weather radar.

Find out about relief and frontal rainfall. Convectional rainfall When the land warms up, it heats the air above it. What factors affect population density? Rain or drizzle which freezes on contact within a subfreezing air mass gains the preceding adjective “freezing”, becoming known as freezing rain or freezing drizzle. When the air reaches saturation point also known as condensation point and dew point the water vapour condenses and forms tiny droplets of water.

Complex forces cause the water droplets to fall as rainfall.