Wind sea and land breezes - Earth Science.ppt

Earth Science

1. Wind: Sea Breeze
and Land Breeze

2. EnergyTransfer in
the Atmosphere
•Energy moves through the atmosphere
in three different ways-conduction,
convection and radiation
•Convection is the main way that air
circulates in the atmosphere

3. What is convection?
•Energy transfer due to differences in
density
•Occurs in liquids and gases
•Warm air rises
•Cool air sinks
•Forms a convection cell

4. Specific Heat
•The amount of energy required to raise
the temperature of a substance
1degree celsius
•measured in joules
•see esrt for more information

5. Which substance has a
higher specific heat?

6. Which substance will have a
higher specific heat? Land
or Water? Why?

7. Water will have a
higher specific heat
because it will reflect
the sun’s incoming
solar radiation....

8. Therefore...water will
take a longer time to
heat up, but will
retain this heat for
longer...so...

9. A sea breeze will
form...
•Sea Breeze: wind moves from ocean to
land
•The atmospheric pressure is higher
over the ocean then over the land
because the air is cooler during the day
•At night the air is cooler over the land,
so a land breeze forms

11. At night a land
breeze develops...

12. Wrap UP:

13. 1.Why does the ocean heat up more slowly than the
land?
2.Which substance has a higher specific heat-lead or
ice?
3.Why do thunderstorms usually happen at the end of
a hot summer day?
4.Why do people like to sit near the ocean on a hot
summer day?