The following document contains summarised notes taken on Topic 4. Water and aquatic food production systems and societies This includes: 4.1 Introduction to water systems, 4.2 Access to fresh water, 4.3 Aquatic food production systems and 4.4 Water pollution. The use of colourful images, graphs, c...
Sun causes water from land and sea surfaces to evaporate .
Water transforms into
liquid vapour .
Through tothe process of
transpiration ,
water moves from the hoot the leaves and
It transforms it into Water condenses Into visible water vapour
.
vapour .
to form clouds .
They cool and become
heavy Precipitation occurs Other night
.
.
water the water vapour in the atmosphere is
'
can condense and
deposited as dew .
Vegetation will slow the movement of water and
infiltrate the water . Water will percolate into underground
aquifers .
Ground water will flow into the sea or into surface streams .
, 4.1.2 Ocean circulation
systems
for
The global conveyor belt :
responsible distributing heat
energy ,
which directly affects regional -
weather around the world .
the water the
Temperature the colder
:
more dense
salinity the greater the salinity the
:
more dense the water
cold water is dense .
In addition ,
when water freezes salt is left behind
.
,
Cold water and salt makes water even denser and sinks Cold .
water moves towards the
equator and warms The warmer .
the less dense and becomes surface water .
Surface waters move towards the Polar Regions , warming the
temperature → negative feedback loop
How does the
global conveyor
belt influence weather and climate ?
Specific heat capacity
:
amount of heat
energy that must be
absorbed or realeased for 1g of a substance to
change its temperature
1°
by .
Water has a high specific heat capacity meaning that it takes
large amounts of energy to increase ocean temperatures Warm .
towards the poles Cold water
water moves
increasing the temperatures .
moves towards the equator water absorbs the heat and lowers
,
the
temperatures affecting the weather .
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