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ATM OCN 100 - Summer 2001 LECTURE 1B

ATM OCN 100 - Summer 2001 LECTURE 1B. OBSERVATIONS of EARTH'S ATMOSPHERE (con’t.) A. Introduction Practical Questions B. The Planet Earth & Earth Systems C. Survey of Planet Earth’s Atmosphere D. Weather & Climate Elements E. Probing the Atmosphere. MADISON’S CURRENT WEATHER.

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ATM OCN 100 - Summer 2001 LECTURE 1B

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  1. ATM OCN 100 - Summer 2001LECTURE 1B OBSERVATIONS of EARTH'S ATMOSPHERE (con’t.) • A. IntroductionPractical Questions • B. The Planet Earth & Earth Systems • C. Survey of Planet Earth’s Atmosphere • D. Weather & Climate Elements • E. Probing the Atmosphere

  2. MADISON’S CURRENT WEATHER Madison Weather at 1000 AM CDT WED JUN 19 2002 Updated twice an hour at :05 and :25 Sky/Weather: LGT RAIN Temperature: 67 F (19 C) Dew Point: 60 F (15 C) Relative Humidity: 78% Wind: S10 MPH Barometer: 30.14R (1020.6 mb)

  3. F. THE SURFACE WEATHER MAP (con’t.) • Interpretation of modern surface weather mapswhere...

  4. Sample Modern Weather MapFigure I.3, Moran & Morgan (1997)

  5. ON THE SURFACE WEATHER MAP • Pressure systems • Isobars (“iso” + “bar”) • Highs & Lows • Winds • Circulation around Highs & Lows • The “Hand-twist Model”

  6. Air Converging AloftFig. 9.20 Moran & Morgan (1997)

  7. Flow around Low Pressure Fig. 9.18 Moran & Morgan (1997)

  8. Air Diverging AloftFig. 9.21 Moran & Morgan (1997)

  9. ON THE SURFACE WEATHER MAP • Pressure systems • Winds • Clouds • Mainly around lows • Temperature Patterns • Isotherms (“iso” + “therms”) • Fronts • Cold fronts, warm fronts & stationary fronts

  10. Cold Front

  11. Stationary Fronts

  12. Current Surface Weather Map with Isobars (“iso” = equal & “bar” = weight), Fronts and Radar Isobars

  13. Current Visible Satellite Image Clouds

  14. Current Temperatures (°F) & Isotherms(“iso” = equal +”therm” = temperature)

  15. Rule of Thumb!Weather Systems move: • From West to East in midlatitudes • From East to West in tropics

  16. Tomorrow AM Forecast Map

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