L1- A Journey Through Climate Flashcards
How much has the average temperature risen by?
It has risen by 0.8°C(from 13.9°C to 14.7°C)
When was the temperature the highest and lowest?
It was highest in 2009 and lowest in 1870.
What impact does ice sheet melting have on our planet?
Ice reflects heat, keeping the planet cool.
What do sunspots indicate?
It indicates the amount of energy released from the sun.
How do meteorites block sunlight?
Meteorite impact throws up a cloud of ash and dust.
What impact does volcanic eruption have on the temperature?
Emissions block out sunlight, lowering the temperature.
How does axis wobbles affect the amount of sunlight received?
Changes in the earths tilt axis affects the amount of sunlight received.
How long does it take for the earths orbit to change from circular to an ellipse (oval) and back again?
It takes 100,000 years
What are orbit changes called?
Milankovitch cycles
When the earths wobble on it axis, when does it receive the greater amount of energy from the sun?
When the earth is more upright, it receives more energy therefore increasing the temperature.
What are sunspots activity?
Explosions of intense heat on the suns surface.
When did the temperature rises fast?
Between 1950 and 1980
How much do volcanoes reduce the amount of sunlight entering our planet?
It reduces it by 10%
When is the suns cycle of solar activity high and low?
It is higher every 11 years and lower every 11 years (irregular cycle)
What is happening to the ice in Antarctica?
364 metres ice-core melting, ice is melting a a fast rate than the last 1000 years
