Advertisement Upgrade to remove ads

pressure gradient force

causes air to move from a higher pressure toward lower pressure

horizontal pressure differences

caused by temperature differences

the gas law formula

pressure=temp x density x constant

the gas law

temp increases, density decreases if pressure is constant.

coriolis force

constantly pulling the wind to its right in NH and left in SH

horizontal pressure changes

much less than vertical. wind blows from high pressure

sea pressure correction

10 mb for 100 m above sea levels. always add on pressure if going down to sea level.

large scale (synoptic) weather systems

winds blow counterclockwise around the low pressure system in norther hemisphere.

pressure gradient force winds

high to low pressure

coriolis force winds

directed to the right

subtropical highs

air from equator creates an area of high pressure

westerlies

air moves toward the poles and deflects toward the east, resulting in westerly flow

polar easterlies

polar air deflected by the coriolis force resulting in a NE flow

high pressure areas

near lat. 30 latitudes and near the poles

low pressure areas

near the equator and at 60 latitudes

jet streams

air currents thousands of miles long, hundreds of miles wide. wind speed can exceed 100 mph. found near the tropopause.

isobaric surface

constant pressure surface

cyclonic flow

southern hemisphere, counterclockwise

anticyclones flow

clockwise, northern hemisphere

horse latitudes

weak winds

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set