Local Wind Patterns and Formation
Local wind patterns II
What are Local winds?
Local winds are one of
the main types of winds
caused by differences in
air temperature.
The temperature
differences often develop
through the day as the
sun heats the air and land,
but they can also be
formed when surfaces do
not heat or cool evenly
How are the following local wind
patterns formed?
•
Land and sea breezes
•
Mountain and valley breezes
•
Chinook and Santa Ana winds
•
Country breeze
Land and sea breezes
Sea and land breezes
are
types of thermal
circulation systems that
develop at the interface
of land and ocean.
During the daytime land
heats up much faster than
water as it receives solar
radiation from the Sun .
The warmer air over the
land then begins to
expand and rise forming a
thermal low.
Daytime
At sunset, the land
surface stops receiving
radiation from the Sun .
As night continues the
land surface begins losing
heat energy at a much
faster rate than the water
surface. Wind flow now
moves from the land to
the open ocean. This type
of localized air flow is
called a land breez
Night time
Mountain and valley breezes
A
valley breeze develops
during the day as the
Sun heats the land
surface and air at the
valley bottom and sides.
As the air heats it
becomes less dense and
buoyant and begins to
flow gently up the valley
sides.
Day time
Mountain and Valley Breezes
During the night, the air
along the mountain
slopes begins to cool
quickly because of
long
wave radiation
loss
it becomes more dense
and begins to flow
downslope causing a
Mountain breeze
Night time
Chinook and Santa Ana winds
Chinook wind
- warm,
westerly wind found in
western North America-
Canada and the USA, when
air from the Pacific blows
over the Rocky Mountains
and other upland areas.
Santa Ana winds
-
hot, dry,
strong, blustery, föhn-type
wind which blows from
the north-east or east
over southern California
and carries with it large
quantities of dust
http://www.google.co.kr
/
Country breeze
One of local wind called
a country breeze is
associated with large
urban area As the name
implies this circulation
pattern is characterized
by a light wind blowing
into the city from the
surrounding country side
How do these local wind patterns
affect our daily lives?
reference
•
http://www.ask.com/science/local-winds-45330ad2a772b05
•
http://www.upf.br/comarte/?p=584
•
http://www.physicalgeography.net/fundamentals/7o.html
•
http://www.atmo.arizona.edu/students/courselinks/fall09/nats101s2/lect
ure_notes/nov13.html
•
https://reginnovations.org/wind-energy/wrf-wind-simulation-wind-
energy-production-estimates-forced-different-reanalyses-comparison-
observed-datafor-portugal/
•
http://www.weatherwizkids.com/weather-wind.htm
•
http://www.mymodernmet.com/profiles/blogs/list/tag/sandstorm
•
http://www.fractaluniverse.org/v2/?page_id=145
Local winds are a significant type of wind caused by variances in air temperature, often developing throughout the day due to solar heat. Land and sea breezes, mountain and valley breezes, Chinook and Santa Ana winds, and country breezes are examples of local wind patterns formed under different conditions. These patterns are influenced by the heating and cooling of surfaces, leading to distinct circulation systems and airflow directions. By understanding these phenomena, we gain insight into the complexity of Earth's atmospheric processes and their impact on local climates.
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Presentation Transcript
What are Local winds? Local winds are one of the main types of winds caused by differences in air temperature. The temperature differences often develop through the day as the sun heats the air and land, but they can also be formed when surfaces do not heat or cool evenly
How are the following local wind patterns formed? Land and sea breezes Mountain and valley breezes Chinook and Santa Ana winds Country breeze
Land and sea breezes Sea and land breezes are types of thermal circulation systems that develop at the interface of land and ocean. During the daytime land heats up much faster than water as it receives solar radiation from the Sun . The warmer air over the land then begins to expand and rise forming a thermal low. Daytime
At sunset, the land surface stops receiving radiation from the Sun . As night continues the land surface begins losing heat energy at a much faster rate than the water surface. Wind flow now moves from the land to the open ocean. This type of localized air flow is called a land breez Night time
Mountain and valley breezes A valley breeze develops during the day as the Sun heats the land surface and air at the valley bottom and sides. As the air heats it becomes less dense and buoyant and begins to flow gently up the valley sides. Day time
Mountain and Valley Breezes During the night, the air along the mountain slopes begins to cool quickly because of long wave radiation loss it becomes more dense and begins to flow downslope causing a Mountain breeze Night time
Chinook and Santa Ana winds Chinook wind- warm, westerly wind found in western North America- Canada and the USA, when air from the Pacific blows over the Rocky Mountains and other upland areas. Santa Ana winds- hot, dry, strong, blustery, f hn-type wind which blows from the north-east or east over southern California and carries with it large quantities of dust http://www.google.co.kr/
Country breeze One of local wind called a country breeze is associated with large urban area As the name implies this circulation pattern is characterized by a light wind blowing into the city from the surrounding country side
How do these local wind patterns affect our daily lives? Tornado yellow dust typhoon Hurricane
reference http://www.ask.com/science/local-winds-45330ad2a772b05 http://www.upf.br/comarte/?p=584 http://www.physicalgeography.net/fundamentals/7o.html http://www.atmo.arizona.edu/students/courselinks/fall09/nats101s2/lect ure_notes/nov13.html https://reginnovations.org/wind-energy/wrf-wind-simulation-wind- energy-production-estimates-forced-different-reanalyses-comparison- observed-datafor-portugal/ http://www.weatherwizkids.com/weather-wind.htm http://www.mymodernmet.com/profiles/blogs/list/tag/sandstorm http://www.fractaluniverse.org/v2/?page_id=145
