- Created by: Pheebie
- Created on: 25-10-12 14:57
Factors Effecting Weather
- Cloud cover
- Distance from sea
- Ocean Currents/ Conveyor belt
- Prevailing Winds
- North/ South facing slope
- Diurnal range
- Urbanisation/ Urban heat island effect
- Time of day
- Angle of the sun
- High/ Low pressure
Types of Cloud
Tri- Cellular Model
Every point on the Earth's surface rotates over a 24 hour period.
This causes air to move East in the Northern atmosphere and West in the Southern atmosphere.
Pressure Gradient and Geostrophic Winds
PRESSURE GRADIENT: Force and deflection at a balance leads to pressure moving from high to low or low to high. It can be described as change in pressure across a given difference.
GEOSTROPHIC WINDS: Result of exact balance between Coriolis force and pressure gradient where the wind runs exactly parallel to isobars.
- Fast flowing air currents in the Earth's atmosphere.
- Meandering shape.
- There are two types; the Polar Jet Stream and the Sub-Tropical Jet Stream.
- Caused by a combination of the Earth's rotation and atmospheric heating.
- Since 2007- it has being low across UK meaning it has become a lot colder.
- Width of 2km and depth of 5km.
- Lies about 7-12km above the Earth's surface.
- Polar jet stream is stronger as it's closer to sea level.
- Moves between 100-300km per hour.
- Located in the troposphere.
El Nino & La Nina
- Occurs across tropical Pacific Ocean approx. every 5 years.
- Also called Southern oscillation.
- Causes a warm rush into the ocean of about 5 degrees increase.
- This intern causes change in climate and weather around the world.
- Causes drier weather in usually wet places and wet weather in usually dry places.
- LA NINA is the opposite effect. It's caused by over compensation after El Nino.