Massive Storms! 8.10C Identify the role of the oceans in the formation of weather systems such as hurricanes
Instructional page:
Each person in group will take on one portion or set of questions: Each person will complete some part of the research The group divides the research and tasks evenly, 2 people per group Use the research links provided on the teacher s website to get started Use google doc to collect information, or you can put information straight onto a slide Collaborate with your other group members and create a presentation with all of your collected information.
A method to the madness: You can make each question a slide in the presentation You can also divide the question/slides by people and then put all of the slides together into one presentation This information will be what you use to learn about hurricanes (in addition to resources on teacher s website) Each class will make one complete presentation about hurricanes All 3 class s power points will be posted in the review section of teacher s website
Example (fake) question and answer: What causes tornadoes to form? Not a good answer: Tornadoes are formed by thunderstorms.
Better answer: Most tornadoes form from thunderstorms. You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada. When these two air masses meet, they create instability in the atmosphere. A change in wind direction and an increase in wind speed with increasing height creates an invisible, horizontal spinning effect in the lower atmosphere. Rising air within the updraft tilts the rotating air from horizontal to vertical. An area of rotation, 2-6 miles wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation.
Making the presentation: How to make a google presentation: http://viewpure.com/mqhi1fyr7zc Make a mind map with google drawing: https://www.youtube.com/watch?v=ds9yol9iwkq Make a flow chart with google drawing: https://www.youtube.com/watch?v=asna86jswmc How to use google drawing: https://www.youtube.com/watch?v=_wtnrhlgug4
Here are your tasks: The group divides the question and tasks evenly Each person will complete some part of the research Use the research links provided on the teacher s website to get started Use an individual google doc to collect information Collaborate with your partner and create a presentation with all of your collected information. Keep in mind the artistry of presenting information clean slides, no garish colors and ACCURATE information!
Hurricanes
What a Hurricane Needs to Develop
Warm tropical water - at least 80 F High Humidity Light wind Low Pressure Area Form between 5 and 20 latitude Hurricane Ingredients
Hurricane Formation As water evaporates from warm ocean waters this warm, moist air (less dense) rises in the atmosphere, leaving less air near the surface, and forming a low pressure area Hurricane Formation
Hurricane Formation As more ocean water evaporates and fuels the hurricane, the low pressure at the surface will get stronger and it will spin faster, leading to higher sustained wind speeds How Hurricanes Form
Inside the Hurricane
Hurricanes need warm water to form so they form near the equator, but not on it. Why?
Hurricanes turn to the right away from the equator because of the Coriolis Effect caused by Earth s rotation. http://www.guardian.co.uk/world/interactive/2008/jan/28/hurricanes
Hurricanes, typhoons and cyclones oh my! Hurricanes, cyclones, and typhoons are all the same weather phenomenon; we just use different names for these storms in different places. Called a Hurricane in the Atlantic and Northeast Pacific Typhoon in the Northwest Pacific Cyclones occur in the South Pacific and Indian Ocean. If the right conditions persist long enough, violent winds, incredible waves, torrential rains, and floods are created.
When hurricanes reach land:
Hurricanes weaken as they move over land They lose their source of heat and moisture Friction over land also reduces the circulation of surface winds, weakening a hurricane Hurricane Weakening
Famous Hurricanes Off the Texas coast Galveston: 1900 Known as "the Galveston Hurricane," the deadliest hurricane disaster in U.S. history occurred on September 8. More than 8,000 people died More than half of all the homes and buildings were destroyed.
Monsoons Monsoons are seasonal shifts in the prevailing wind direction, that usually brings with it a different kind of weather. It almost always refers to the Asian monsoon, a large region extending from India to Southeast Asia
Monsoons blow from the land toward the sea in winter, and from the sea toward land in the summer Runs from June to September Intense period of heavy rain, booming thunder, and plenty of lightening Monsoon Animation
El Niño
Abnormally high surface ocean temperatures off the coast of South America Causes unusual weather patterns across the globe Occur every 2 7 years
El Nino Starts because the easterly trade winds weaken and allow the warm waters in the Western Pacific to move east toward South America
El Nino This changes where the convection current occurs Causing rain where it usually doesn't occur and drought where it usually rains
La Nina After the El Nino phase, the La Nina follows Abnormally Low surface ocean temperatures off the coast of South America Causes unusual weather patterns across the globe
EL NINO Weaker Trade Winds warm water spreads out Equal condensation & precipitation throughout Compared to Normal, there is LESS precipitation near Asia and MORE by the Americas Animation NORMAL/LA NINA Strong Trade Winds More warm water near Asia more condensation more precipitation
El Nino and La Nina Explained Watch video: http://education.nationalgeographic.com/education/acti vity/the-ocean-and-weather-el-nino-and-la-nina/?ar_a=1 http://www.kspr.com/weather/what-is-elnino/21051524_22912504