L4th Weather and Climate Revision

Comprehensive vocabulary flashcards covering the L4th Weather and Climate Revision Checklist topics, including weather instruments, the water cycle, rainfall types, UK climate factors, microclimates, urban heat islands, and extreme weather events.

Weather

The day-to-day conditions of the atmosphere at a specific time and location.

Climate

The average weather conditions recorded over a long period of time (typically 30 years).

Climate Graph

A graph that displays monthly average temperatures using a line graph and total monthly precipitation using a bar chart for a particular location.

Thermometer

An instrument used to measure air temperature, typically recorded in degrees Celsius ($^\circ\text{C}$) or Fahrenheit ($^\circ\text{F}$).

Barometer

An instrument used to measure atmospheric air pressure, typically measured in millibars ($\text{mb}$) or hectopascals ($\text{hPa}$).

Anemometer

An instrument used to measure wind speed, typically recorded in miles per hour ($\text{mph}$) or kilometers per hour ($\text{km/h}$).

Rain Gauge

An instrument used to collect and measure the amount of precipitation over a set time period, measured in millimeters ($\text{mm}$).

Wind Vane

An instrument used to indicate the direction from which the wind is blowing.

Evaporation

The process in the water cycle where liquid water is heated by solar energy and converted into water vapor (gas).

Condensation

The stage in the water cycle where rising water vapor cools and transforms back into tiny droplets of liquid water, forming clouds.

Precipitation

Water released from clouds in the form of rain, snow, sleet, or hail that falls to Earth's surface.

Infiltration

The process by which water on the ground surface enters and soaks down into the soil.

Transpiration

The release and evaporation of water vapor from the leaves of plants into the atmosphere.

Convectional Rainfall

Rainfall that occurs when solar radiation intensely heats the ground, causing the warm air above to rise rapidly, cool, condense, and form convective clouds.

Relief Rainfall

Precipitation produced when moist air is forced to rise over high relief features such as hills or mountains, cooling and condensing as it ascends.

Frontal Rainfall

Precipitation that forms when an incoming warm, moist air mass meets a colder, denser air mass, forcing the lighter warm air to rise over the cold air.

Latitude (UK Climate Factor)

The distance north or south of the equator; places at higher latitudes receive less concentrated solar radiation and are cooler than equatorial regions.

Altitude (UK Climate Factor)

The height of land above sea level; higher elevations experience lower temperatures because the atmosphere thins and cools with height.

South-West Prevailing Wind

The most common wind direction experienced by the UK, which brings warm and moist air from across the Atlantic Ocean.

North Atlantic Drift

A warm ocean current flowing from the Caribbean across the Atlantic that raises winter temperatures along the UK's western coastline.

Maritime Air Mass

An air mass that originates over the ocean, bringing moisture, high humidity, and cloud cover to the land.

Continental Air Mass

An air mass that develops over a large landmass, bringing dry weather conditions that are hot in the summer and very cold in the winter.

Microclimate

The distinct local climate of a small, specific area that differs noticeably from the surrounding regional climate.

Aspect (Microclimates)

The direction in which a slope faces relative to the sun, determining the amount of solar radiation and warmth it receives.

Urban Heat Island Effect

A phenomenon where urban regions experience significantly higher temperatures than surrounding rural areas due to human activity, heat-absorbing materials like concrete and asphalt, and less vegetation.

Beast from the East

A notable UK extreme cold weather event caused by an easterly airflow from Siberia bringing sub-zero temperatures, ice, and widespread snow.

Heatwave

A prolonged period of unusually hot weather relative to the typical expected temperatures of an area for that time of year.