*Make sure you “play” the power point, or you will miss some of the information that is hidden behind pictures!

  You received a completion grade on your winds packet for having it done.  Check your answers to see if you were right!!  If you turn it in before I hand out the answer key (SODOITRIGHTNOW) then you can still get full credit. Check Winds Packet

  Meteorology Tools: Fill in the chart as the video plays! Meteorology Tools Chapter 12 Study Guide: Sections 3 & 4

  Check your answers.  Record the # incorrect on the front.  Return key, pen and your answers to the front desk.  Pick up : notes  Interims ! Get signed!  Due back by Friday. HW Grade !  Current Events : “ Redo ” due by Friday ! Chapter 12 Study Guide Sections 3 & 4

  Weather  Short term conditions of the atmosphere  Changes frequently  Climate  Long term pattern of precipitation and temperature range  More steady and less variation Weather vs Climate

  Cold, dry air is more dense and creates high pressure.  Warm, moist air is less dense and creates low pressure.  Air moves from high pressure to low pressure.  Moving air is called wind.  Winds are named for where they come from.  The Sun is the primary source of energy in the atmosphere. Review of Key Facts

Heating of the Atmosphere Minilab In your composition book… 1.Copy the title of the lab 2.Copy the guiding question and answer 3.Record your data 4.Copy the two analysis questions and answer them.

  Because the Earth rotates, objects don’t travel in straight lines over the Earth’s surface.  In the N. Hemi, objects are deflected West (right)  In the S. Hemi, objects are deflected West (left) The Coriolis Effect

  Cyclones are low pressure centers and they rotate counter clockwise (N. Hemi)  What comes to mind with “cyclones”?  Tropical cyclones, tornadoes, mid-latitude cyclones  Blizzards, Nor’easters  Anticyclones are high pressure centers and rotate clockwise (N. Hemi) Cyclones vs Anticyclones

 Today’s Mid-latitude Cyclone

 3 Celled Circulation Model Because the Earth rotates, the Coriolis Effect deflects winds as they move over the surface.

  Equator – warm rising air “doldrums” and “ITCZ”  Climate: Tropical Rain Forests  30 N and 30 S – “Horse latitudes”  Climate: Deserts  Poles – cool sinking air  N and S of Equator: “Trade Winds”  N and S: “Prevailing Westerlies”  N and S: “Polar Easterlies Label Your 3 Celled Circulation Model Polar easterlies Prevailing Westerlies Trade Winds ITCZ Doldrums Horse Latitudes

 Key sets of Winds  Horse Latitudes  ~30 N/30S  Doldrums  ITCZ  Equator  Trade Winds  Between 0 and 30

 The Jet Stream The Jet Stream is a very fast moving high altitude westerly wind It moves between the convection cells DOLDRUMS HORSE LATITUDES DOLDRUMS HORSE LATITUDES

 Monday’s Polar and Subtropical Jet Streams

  Form due to differences in heating and cooling rates of land and water  Sea Breezes happen during the day because land heats faster than water  Diagram the sea breeze Local Winds: Sea Breeze

 Where would clouds form? Over land? Or over water?

  Land breezes happen at night because water cools more slowly than land  Diagram the land breeze Local Winds: Land Breeze

 Key Differences!

 Local Winds: Monsoons South East Asia’s Monsoon looks a little like sea/land breezes: BUT…. Monsoons are NOT rainy and dry seasons!

 Local Winds: Monsoons Monsoons are a seasonal shift in wind patterns The SE Asian Monsoon is just very famous for bringing wet weather or dry weather, depending on the direction of wind. m

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  Meteorology Tools: Fill in the chart as the video plays! Meteorology Tools  Finish the chapter 12 study guide for homework! Chapter 12 Study Guide: Sections 3 & 4

  Check your answers.  Record the # incorrect on the front.  Return key, pen and your answers to the front desk.  Pick up : notes  Interims ! Due back by Thursday. HW Grade !  Current Events : “ Redo ” due by Thursday ! Chapter 12 Study Guide Sections 3 & 4

  Monsoons/True and False Review  Return & Go over  Movement of Air  Check your answers! Winds Review

Warm Up: Air Pressure & Temperature in the Atmosphere! 1.Do air pressure and temperature change in the same way with altitude? Explain your answer. 2.Describe the temperature changes that take place in each layer of the atmosphere. 3.Why does temperature increase with height in the stratosphere?

  Isotherms: Lines on a map that show points of equal TEMPERATURE  Isobars: Lines on a map that show points of equal PRESSURE Introduction to Isolines

  Isotherms – lines of equal temperature  Isobars – lines of equal air pressure Isopleths

  Air Masses Video: Fill in the foldable as the video plays! Air Masses Video  Fronts Foldable:  Fill in from the textbook! Use Pg. 322  Quiz at the end of next class: Air Masses & Fronts! Air Masses

  Air Masses Video: Fill in the foldable as the video plays! Air Masses Video  Fronts Foldable:  Fill in from the textbook! Use Pg. 322  Quiz at the end of class: Air Masses & Fronts! Air Masses

  What are the abbreviations?  What are the characteristics?  Where do they originate?

 Fronts: Where air masses meet  Cold Fronts Dense cold air acts like a bulldozer.  Cold air mass advances (cP)  Pushes up warm air mass (mT)  Cumulonimbus clouds often form ahead of the front  What’s the weather like before, during and after a cold front?

Cold Front

 Fronts: Where air masses meet  Warm Fronts Less dense warm air has more difficulty advancing.  Warm air mass advances (mT)  Slowly pushes back cold air mass (cP)  Stratus/nimbostratus clouds often form ahead of the front  What’s the weather like before, during and after a warm front?

Warm Front

 Fronts: Where air masses meet  Occluded Fronts  A cold front catches up to a warm front.  Nimbostratus clouds often form where the two fronts merge.  What’s the weather like during and after an occluded front?

Occluded Front

 Fronts: Where air masses meet  Stationary Fronts  A cold air mass meets a warm air mass, but neither advances.  Nimbostratus clouds often form where the two fronts merge.  What’s the weather like during a stationary front?

Stationary Front

mid latitude cyclone

 A Mid Latitude Cyclone  Cyclone = a low pressure center that usually involves precipitation  Rotates counterclockwise in the N. Hemi  Examples:  Tropical cyclone (hurricane)  Mid Latitude Cyclone (low pressure with fronts)  Tornado

 Mid Latitude Cyclone

 Tools (finish for HW)

 What are some that YOU might use? Tools that professional forecasters use:  Radiosondes  Radar Radar  Satellites  Infrared vs Visible vs Water Vapor Infrared vs Visible vs Water Vapor Forecasting Tools:

 Analyze how infrared imagery is used by meteorologists by completing the following statements. 1.Infrared imagery detects differences in _______________. 2.Objects show up differently according to the __________. 3.The temperature of a cloud tells meteorologists about its _______ and _______. Check for Understanding:

 Station Model

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 Answer the following questions about this station model at right: INCLUDE UNITS!! 1.What is the wind direction? 2.What’s the wind speed? 3.What’s the temperature? 4.What’s the current weather? 5.What’s the dew point? 6.What is the amount of cloud cover? 7.The air pressure is mb. What got “dropped” to abbreviate it on the station model? 8.Has the air pressure been rising, sinking, or steady over the past 3 hours?

 Station Model

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 Collecting Data in the Atmosphere  Ground Based Data:  Most weather collecting stations are at airports. Why?  Radiosondes (instruments attached to weather balloons) are sent up twice a day to record data from the upper atmosphere

 Radiosonde Data: Skew-T Log-P  Red: Temperature  Green: Dew Point  Light Blue: Air Pressure

  Pick up Ch 13 Study Guide and video questions when finished & get started on the HW.  HW: Ch 13 Study Guide due next class!  Monday is no school for Students. Enjoy QUIZ! Air Masses & Fronts