my presentation (weather)
TRANSCRIPT
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WEATHER
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Motivation :
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TABLE OF CONTENTS
IntroductionWeather
ClimateMeasuring a Weather
Tropical CyclonePubic Storm Warning Signals
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The Sun shines more directly near the equator bringing these areas more warmth. However, the polar regions are at such an angle to the Sun that they get is little or no sunlight during the winter, causing colder temperatures. These differences in temperature create a restless movement of air and water in great swirling currents to distribute heat energy from the Sun across the planet.
Introduction
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When air in one region is warmer than the surrounding air, it becomes less dense and begins to rise, drawing more air in underneath. Elsewhere, cooler denser air sinks, pushing air outward to flow along the surface and complete the cycle.
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What is WEATHER?
• the hour to hour, day to day change in the atmosphere.
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What is CLIMATE?
• the average weather conditions of a place taken over a long time.
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> The difference between weather and climate is a
measure of time.
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How do we measure weather?
Cloud CoverTemperature
SunshineWind
Air PressurePrecipitation
Measuring a Weather
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Cloud cover
> Cloud cover is measured just by using our eyes.
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Cumulus Clouds
are the puffy clouds that look like puffs of cotton. Cumulus clouds that do not get very tall are indicators of fair weather. If they do grow tall, they can turn into thunderstorms. The bottom of cumulus clouds are fairly close to the ground.
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Status Clouds
look like flat sheets of clouds. These clouds can mean an overcast day or steady rain. They may stay in one place for several days.
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Cirrus Clouds
are high feathery clouds. They are up so high they are actually made of ice particles. They are indicators of fair weather when they are scattered in a clear blue sky.
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TEMPERATURE
> is measured using maximum - minimum
thermometers
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A WEATHER THERMOMETER
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SUNSHINE
> The total amount of sunshine in a day is measured using a sunshine
recorder.
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Camp-Strokes Sunshine Recorder
The sun’s rays travel through the glass ball and burn marks onto the card behind it.
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AIR PRESSURE
> Air pressure is measured using a
barometer and recorded using a barograph .
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Barometer
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Precipitation
> Precipitation is any moisture that comes from the
atmosphere(rain, snow, hail).
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RAIN GUAGEThe amount of
precipitation is measured using a rain gauge .
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WIND
Wind is measured in two ways with two instruments:
– Wind Vane – Anemometer
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Wind VaneWind Direction
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Anemometer
Wind Speed
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TROPICAL CYCLONE
A Tropical Cyclone (known as “Bagyo” in the Philippines) is the global generic term for an intense circulating weather system over
tropical seas and oceans.
Tropical Cyclone
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TOPICAL CYCLONE CATEGORY
There are four (4) classifications of tropical cyclone based mainly on its
strength or maximum sustained winds (based on 1-minute or 10-minute
average):*Tropical Depression
*Tropical Storm*Typhoon
*Super Typhoon
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*Tropical Depression-Have a maximum sustained winds of between 35 KPH and 64 KPH near the center
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*Tropical Storm
- Have a maximum sustained winds of between 65 KPH and 118 KPH near the center
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*Typhoon-Have a maximum sustained winds of between 19 to 200 KPH near the center
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*Super Typhoon
-Have a maximum sustained winds greater than 200 KPH
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PUBLIC STORM WARNING SIGNALS
Signal #1
>>It has a wind of 30-60 kph may be expected in at least 36 hours or intermittent rains may be expected within 36 hours.>>twigs and branches of small trees may be broken .
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PUBLIC STORM WARNING SIGNALS
Signal #2
>> It has a wind of greater than60-and up to 100 kph may be expected in at least 24 hours>>Some coconut trees may be tilted with few others broken . Few big trees may be uprooted.
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Signal #3
>>It has a wind of greater than 100 kph up to 185 kph may be expected in at least 18 hours.>>Majority of all nipa and cogon houses may be unroofed or destroyed and there may be considerable damage to structures of light to medium construction.
PUBLIC STORM WARNING SIGNALS
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PUBLIC STORM WARNING SIGNALS
Signal #4
>>It has a very strong winds of more than185 kph may be expected in at least 12 hours>>Most residential and institutional buildings of mixed construction may be severely damaged
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QUOTATION:
“Climate is what you expect; Weather is what
you get."