New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Maureen Ledner


Maureen Ledner
GPA 3.51


Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Class Notes
25 ?




Popular in Course

Popular in Meteorology

This 5 page Class Notes was uploaded by Maureen Ledner on Friday September 18, 2015. The Class Notes belongs to MET 1010 at University of Florida taught by Staff in Fall. Since its upload, it has received 14 views. For similar materials see /class/206629/met-1010-university-of-florida in Meteorology at University of Florida.




Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/18/15
Chapter 9 Air Pressure Forces and Wind Air pressure Using a model that assumes a constant air density with altitude L H Pl Pz 1 2 cold hot For the warmer city 2 higher pressure aloft will eventually lead to lower surface pressure because wind blows from high to low pressure in response to the pressure gradient force How can air density be constant with altitude Only approximately true over small heights Ideal Gas Law P p T If P is in millibars mb T is in Kelvins and p is in kgm3 then C E 287 This relation is valid for a parcel of air within which P p and T are constant Example A parcel of air is raised from the ground to a height of 2 km At 0 km P1 1013mb T1 25 C At 2 km P2 800mb Assume lapse rate of 8 C km What is pz p1 EL 13 C2 8MZL p1 CTZ P1 1013 KTZ T125 C4273298K DTMTWCMDWCNamp ampK amp 800 E 083 p1 1013 K282 p2 83 of p1 Note P2 is 79 of P1 so P decreases faster Mercu Barometer A column of mercury Hg of height h 76 cm exerts about 1 atm of pressure Forces of gravity and air pressure are balanced Station Pressure pressure reading at your location corrected for temperature instrument error calibration and variations in gravity Altitude Corrections allow comparisons of atmospheric pressure from one city to another correcting for different altitudes of the cities Sea Level Pressure add lOmb for every 100 meters that your station is above sea level Connect points of equal pressure at sea level and draw them on a map See map with sea level isobars see Fig 99 b Also very useful in predicting weather trends is a 500mb map which shows contours of altitude at which the pressure is 500 mb See Fig 915 b Note On a surface map winds blow counterclockwise CCW and inward around a surface low and across isobars Winds blow parallel to contours on a 500 mb map What determines how the wind blows Forces cause objects to accelerate Acceleration is any change in speed direction of motion Constant Speed 7 V Acceleration a because of a change in direction Newton s Second law F ma F is net external force on object m a is acceleration of object of mass m Forces that in uence wind are 1 Pressure gradient force 7 causes wind to blow 2 Coriolis force 7 de ects moving wind 3 Centripetal force 7 a combination of other forces that acts perpendicular to V and allows circular motion 4 Friction 7 slows wind down near earth 9 Pz latm 1mm 2 34 ft PATM I 3 T Pz 2 I atm E Pz is linear straight line 1 E I because water is incompressible p constant 34 68 2 ft P P Pressure Gradient PGF is directed from high to low pressure perpendicular to isobars and is larger for closely spaced isobars Coriolis Force We live in a rotating reference frame The earth Example Transparency demo Forcefree frictionless motion will cause object to veer to the right in the Northern Hemisphere as viewed in rotating frame veer to left in Southern Hemisphere Fcor 0 at equator large at poles Fcor is larger for high speeds Centripetal Force An object moving in a circle is accelerating even if it moves at constant m Sitting in a car you need a push to accelerate forward brake g move around a curve So if winds move in a circle around a high or low pressure system a force must be acting on the air directed inward toward the center of the low or high A Isobar


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Kyle Maynard Purdue

"When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the I made $280 on my first study guide!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.