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Regional Gliding School  Also known as a cyclone or a depression  Wind flows counterclockwise and inward  Pressure is lowest in the centre  Expect.

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Presentation on theme: "Regional Gliding School  Also known as a cyclone or a depression  Wind flows counterclockwise and inward  Pressure is lowest in the centre  Expect."— Presentation transcript:

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3 Regional Gliding School  Also known as a cyclone or a depression  Wind flows counterclockwise and inward  Pressure is lowest in the centre  Expect poor weather L PRESSURE SYSTEMS Low Pressure Area

4 Regional Gliding School Secondary Low àSmaller disturbance of cyclone nature àForms within a main depression L L L L PRESSURE SYSTEMS L L L L LL

5 Regional Gliding School U-shaped area of low pressure with higher pressure on either side PRESSURE SYSTEMS similar to a trough but extends outward from a high with lower pressure on either side a neutral area between two highs and two lows

6 Regional Gliding School High Pressure Area  also known as anticyclone  wind flows clockwise and outwards  pressure highest in centre  expect fine to fair weather H PRESSURE SYSTEMS

7 Regional Gliding School PRESSURE SYSTEMS

8 Regional Gliding School NOTE: You must use the buttons in the Confirmation Stage

9 Regional Gliding School A B C D Anticlockwise and inward Clockwise and outward Let's try a few review questions on Meteorology: Question #1 - What direction does the wind flow around a low pressure area? Meteorology Pressure Systems Anticlockwise and outward Clockwise and inward

10 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

11 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

12 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

13 That answer is correct. Let's move on...

14 Regional Gliding School A B C D Ridge Col Trough Secondary low Let's try a few review questions on Meteorology: Question #2 - A U shaped area of low pressure with areas of higher pressure on either side is known as a. Meteorology Pressure Systems

15 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

16 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

17 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

18 That answer is correct. Let's move on...

19 Regional Gliding School Winds always flow from an area of high pressure to an area of low pressure. Winds H L

20 Regional Gliding School u The rate of change of pressure over distance measured at right angles to the isobars. u It is steepest when isobars are close. u It determines wind velocity (the closer the isobars the stronger the winds). Forces Affecting Horizontal Air Movement Pressure Gradient

21 Regional Gliding School u Because the earth rotates beneath the atmosphere, air is deflected to the right in the Northern Hemisphere, until it flows parallel to the isobars. Forces Affecting Horizontal Air Movement Coriolis Force

22 Regional Gliding School North Pole Earth rotates counterclockwise Coriolis Force

23 Regional Gliding School u Friction between the surface of the earth and the atmosphere will slow the movement of air. This in turn increases the angle at which the air crosses the isobars. Forces Affecting Horizontal Air Movement Surface Friction

24 Regional Gliding School u In the Northern Hemisphere, when you stand with your back to the wind, the low pressure area is to your left. Forces Affecting Horizontal Air Movement Buys Ballots Law

25 Regional Gliding School L Buys Ballots Law

26 Regional Gliding School NOTE: You must use the buttons in the Confirmation Stage

27 Regional Gliding School A B C D Pressure gradient Coriolis force Surface friction Buys Ballots Law Let's try a few review questions on Meteorology: Question #3 - Because the earth rotates beneath the atmosphere air is deflected to the right, in the Northern Hemisphere, until it flows parallel to the isobars. This phenomena is known as. Meteorology Pressure Systems

28 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

29 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

30 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

31 That answer is correct. Let's move on...

32 Regional Gliding School Let's try a few review questions on Meteorology: Question #4 - In the Northern Hemisphere, when you stand with your back to the wind, the center of the low is to your left. This phenomena is known as. Meteorology Pressure Systems A B C D Pressure gradient Coriolis force Surface friction Buys Ballots Law

33 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

34 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

35 I’m afraid that answer is incorrect Let's try again... Flying Scholarship Program

36 That answer is correct. Let's move on...

37 Regional Gliding School Congratulations!! You have now completed the Pressure Systems lesson of the Meteorology Module. Of course, this lesson is always available to you for future reference if required. You are now ready to move along to the next Meteorology lesson you have not completed or to any other module you wish. You can advance to the Self Test Module if you feel ready to challenge the final exam. Good Luck! Meteorology Pressure Systems


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