Deserts as Natural Systems (AQA A-Level Geography): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Type of system that deserts operate as
Type of system that deserts operate as
Open systems
3 inputs to desert systems
3 inputs to desert systems
Solar energy, precipitation, wind
2 outputs from desert systems
2 outputs from desert systems
Sediment removal, energy re-radiation
Dynamic equilibrium in deserts
Dynamic equilibrium in deserts
When inputs and outputs of system are balanced
Type of feedback in desertification
Type of feedback in desertification
Positive feedback
Annual precipitation in arid climates
Annual precipitation in arid climates
Less than 250 mm per year
Annual precipitation in semi-arid climates
Annual precipitation in semi-arid climates
Between 250 and 500 mm per year
Global pattern of hot desert distribution
Global pattern of hot desert distribution
Parallel belts around Tropics of Cancer & Capricorn
N hemisphere desert location on continents
N hemisphere desert location on continents
Western sides of continents
Proportion of Earth's surface covered by deserts
Proportion of Earth's surface covered by deserts
More than one-fifth