Presentation on theme: "How Does Mother Nature Show Her Fury? What is Meteorology? Study of the atmosphere that focuses on weather processes and forecasting."— Presentation transcript:
How Does Mother Nature Show Her Fury?
What is Meteorology? Study of the atmosphere that focuses on weather processes and forecasting
ATMOSPHERIC LAYERS TROPOSPHERE: weather occurs here; birds and planes fly here STRATOSPHERE: contains Ozone MESOSPHERE: Radio waves travel up to here THERMOSPHERE: –Ionosphere: aurora borealis –Exosphere: satellites
What Causes the Weather? Global movement of matter is driven by the properties of water and energy Heat Transfer: –Radiation –Conduction –Convection Convection is the primary mechanism of energy transfer in the atmosphere, oceans and asthenosphere
What Causes Climate and Seasons? The shape of the planet and the tilt Milankovitch Cycles: Like a top the Earth wobbles and the length of the elliptical orbit changes every 100,000 years as well as the tilt, causing different latitudes to receive more or less sunlight
Convection Cells Ferrel Cells: Exist from degrees latitude N/S (Westerlies) Polar Cells: Cold, very dry dense air (Polar Easterlies) Jet Streams: Extremely fast moving winds found at boundaries of convection cells
What is the Coriolis Effect?
Can you identify the weather fronts?
How Does Mother Nature Show Her Fury? Thunderstorms –Floods –Hail –Wind –Lightning –Tornadoes Hurricane/Typhoon/Cyclone Dust Storms Blizzards
WHAT IS A TORNADO?TORNADO WHAT CAUSES A TORNADO? MOST TORNADOES ARE SPAWNED BY GIANT THUNDERSTORMS KNOWN AS SUPERCELLS WHERE DO TORNADOES IN THE US OCCUR? MOST TORNADOES IN THE US OCCUR IN CENTRAL AND SOUTHERN STATES FROM THE ROCKIES TO THE APPALACHIAN MTNS, KNOWN AS TORNADO ALLEY
TORNADO FACTS AVERAGE # OF TORNADOES PER YEAR STATE WITH HIGHEST # OF TORNADOES TOP 5 TORNADO STATES STATES WITH LOWEST # OF TORNADOES 816 TEXAS (AVG. 125) TEXAS(125), OKLAHOMA(52), KANSAS(48), FLORIDA(46), NEBRASKA(38) ALASKA, RI, HAWAII, VERMONT, OREGON
How are Tornadoes Measured?
HURRICANE SEASON! WHEN DOES HURRICANE SEASON BEGIN? FROM JUNE TO NOVEMBER WITH SEPTEMBER BEING THE MOST ACTIVE WHEN DOES A TROPICAL STORM BECOME A HURRICANE? WHEN ITS WIND SPEED EXCEEDS 75 MPH MOST POWERFUL ATLANTIC HURRICANE ON RECORD IS HURRICANE ALLEN IN 1980, WHICH REACHED 190 MPH
How Does Lightning Form?Lightning Lightning occurs when there is a charge separation in the cloud. As a thunderstorm grows, electrical charges build up within the cloud, with positive charges at the top, and negative charges at the bottom. Oppositely charged particles gather at the ground below the cloud.
WHICH STORM IS MORE DANGEROUS? SOME FACTORS TO CONSIDER ARE: –INTENSITY OF STORM (SCALES) –LOCATION OF STORM –HOW A STORM ORIGINATES & PROGRESSES –DAMAGE IT CAUSES