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Weather & Climate

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Weather & Climate Definitions

Weather-the state of the atmosphere with

respect to heat or cold, wetness or dryness,calm or storm, clearness or cloudiness.

Climate the average course or condition ofthe weather at a place usually over a period of

years as exhibited by temperature, wind

velocity, and precipitation

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igh !ressure

Higher pressure than what is

normal for that altitude.

What do you notice about the air in this

region"

#rings clear s$ies and fair weather.

%he sin$ing cold air warms as it does so andbecomes stable.Picture taken from:

http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/high_pressure.html

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ow !ressure ' low pressure region (depression

or cyclone) is caused by rising air.

Clouds, rain, and very strong winds

occur.

Why do you thin$ that is"

Picture taken from:

http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/low_pressure.html

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Creating a Cloud

Watch the cloud demonstration*

What were the $ey ingredients in creating

the cloud"

ow is this representative of what might ta$eplace in the atmosphere"

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Cloud %ypes

Picture taken from:

http://commons.wikimedia.org/wiki/File:Cloud_types.jpg

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%emperature & umidity

Temperature - 'ir higher in pressure is usually

cooler air and air lower in pressure is usuallywarmer air.

What happens when the two meet"

Humidity - ow much water is in the air over

how much water could fit in the air (right before

the water begins to condense out of the air). Dew point+ %emperature at which the moisture

saturates the air is the dew point.

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Wind

Caused by the earths surface

being heated unevenly by the sun.

Why would the earths surface heat unevenly"

ow do you thin$ this causes the wind"

Picture taken from:

http://www.disc.wisc.edu/pus/!ewsletters/fe"#news.html

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%hunderstorms

What type of cloud causes these"

Consists of gusty winds, heavy rain and hail.

Can result in a tornado

Picture taken from:

http://www.fairfield.k$%.ct.us/&ogerludlowe/

crogerludlowe"#/we'uests/(eather/

thunderstorm.jpg

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ightning

What did you observe in all the lightning

demonstrations" ow does this suggestlightning occurs"

-nteresting act* /ore people are $illed bylightning per year than

in tornadoes000

Picture taken from:

http://hip.ecse.rpi.edu/)connor/education/*urge/

images/lightning.jpg

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'tmosphere

Troposphere + /ost of the weather

occurs.

Stratosphere+ 123 of the atmospheres

gases are here4 o5one layer is here

Mesosphere+ /ost meteorites burn up

here. Thermosphere+ igh energy rays from

the sun are absorbed4 hottest layer.

Eosphere+ /olecules from atmosphere

escape into space4 satellites orbit here.

Picture taken from:

http://www.windows.ucar.edu/tour/link=/earth/

Atmosphere/layers_acti+ity_print.html

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6reenhouse 6ases

6reenhouse gases + carbon dioxide, methane,

water vapor, nitrous oxide, and fluorocarbons.

're they all bad" We will find out through the

lab.

7etain the heat through a process called the

6reenhouse effect.

Picture taken from:

http://mikeytherhino.files.wordpress.com/%"",/"-/

greenhouse_gases.jpg

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6reenhouse 8ffect

Picture taken from:

http://maps.grida.no/go/graphic/greenhouseeffect