deserts

Question 1

what conditions are needed for desserts to from

Answer 1

less than 250 mm of rain a year

Question 2

strong relationship within deserts

Answer 2

relationship between precipitation and evoptranspiration

Question 3

how is the climate aridity index worked out

Answer 3

precipitation / EPT potential evoptrasnpiration taking in to account factors of wind and solar radiation

Question 4

climatological -

Answer 4

study of climates over a long period of time - anticyclonic subsidences high pressures occurs over semi arid belts 20 -30 n/s of the equator where most deserts are found

Question 5

topography

Answer 5

continentality most deserts found here far away from the dominant trade winds easterlies loose moisture as they traverse over the land masses meaning dry as they blow offshore

Question 6

orographic

Answer 6

high mountain ranges intercept moisture laden winds forcing them to release the moisture and go in to the lee

Question 7

High albedo

Answer 7

High reflectivity - increases aridity

Question 8

Wind influences

Answer 8

shape of desert the quantity of vegetation that can grow transports dust around

Question 9

dust storms

Answer 9

uk getting sand dust storms public health worry china - “ITS VERY DIRTY IT FEELS LIKE ITS THE END OF THE WORLD”
BBC NEWS

Question 10

TYPES OF DUNES

Answer 10

BARCHON DUNES - THESE DUNES ARE SAND STARVED FORMED IN PLACES WHERE THE wind consistently blows in one direction

Question 11

desertification

Answer 11

impacted by humans over grazing over cultivation land degradation in arid, semi-arid and dry sub-humid environments resulting from adverse human impact on the environment”

Question 12

future of deserts

Answer 12

increasesd co2 we will see greener deserts change to biodiversity and habitats