Natural climate change (Edexcel GCSE Geography A): Flashcards
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Practise the cards
15 cards from this deck
Quaternary period timeframe
Quaternary period timeframe
Most recent 2.6 million years of Earth's history
Cold period duration in Quaternary
Cold period duration in Quaternary
Approx. 100,000 years each
Interglacial period duration
Interglacial period duration
Around 15,000 years
Current climate phase
Current climate phase
Interglacial period (warmer phase between ice ages)
Temp diff: middle of last ice age vs today
Temp diff: middle of last ice age vs today
5°C lower then than now
Milankovitch cycles definition
Milankovitch cycles definition
Long-term variations in Earth's orbit relative to sun
Eccentricity cycle frequency
Eccentricity cycle frequency
Every 100,000 years
Axial tilt cycle frequency
Axial tilt cycle frequency
Every 40,000 years
Precession cycle frequency
Precession cycle frequency
Every 24,000 years
Effect of decreased solar radiation
Effect of decreased solar radiation
Glacial periods more likely to develop
How volcanic eruptions affect climate
How volcanic eruptions affect climate
Ash/dust blocks solar radiation, causes global cooling
What ice cores contain as evidence
What ice cores contain as evidence
Volcanic ash, organisms, air bubbles from when ice formed
Wider tree rings indicate
Wider tree rings indicate
Warmer, wetter climate conditions
Thinner tree rings indicate
Thinner tree rings indicate
Colder, drier periods
Preserved pollen shows
Preserved pollen shows
Past vegetation/whether growing conditions warm or cold