Published on March 6, 2014
UNDERSTANDING TYPHOONS Lesson 1. Tropical Cyclone Lesson 2. Factors affecting Typhoon
Tropical Cyclone – is a storm system characterized by counter clockwise rotating air mass around a central part called core. Another term for Core is called “Eye” and 300 km of central part of the eye. Troposphere – the lowest layer of the earth atmosphere. -75-80 % of the mass of the atmosphere.
• Air pressure and Density of the air are also high and decreasing at high altitudes. •Troposphere is rich in water vapor and dust particles. Tropopause- the boundary between the troposphere and the next atmospheric layer. - it has 20 km above the sea level near the equator.
Jet Streamy – it is beneath the tropopause, the river of air that zooms along at the speed of 400 km per hour. o Conduction and Convection- the earth is primarily warmed by the sun’s radiation and the energy transferred to one another. o Convection- warm, moist of air mixes with cold air.
•Tropical Cyclone originates in the oceans about 300 miles or 500 km away from the equator. •Another term for Tropical Cyclone. - Typhoon or Hurricane Hurricane – is at east of 160 degrees latitude. Typhoon – is on the west of the International Dateline. They are also the same phenomena.
•The word Typhoon comes from the word “Tai Feng”. - it means “Great or Big wind”. •Hurricane comes from the word “Huracan”. - it means “Storm”. 2 words of Typhoon 1.Abundance 2.Similarity
•Typhoons in the Philippines is called Bagyo. •The majority of tropical cyclone formation form between June and November and minimum between December to May. - one source of tropical cyclone formation is the ITCZ located around the equator. ITCZ – Intertropical Convergence Zone.
Formation and Development of Typhoon •A tropical cyclone can generate winds by feeding moisture and heat to the eye. •Moisture and heat come from the air updrafts that rise rapidly. Six main requirements for a typhoon to form and develop: 1.Abundance of warm water 2.Ocean water temperature of 26.5 degree celsius (79.7 degrees fareinheight)
3. Spanning from the surface up to a depth of at least 50 m(160 ft.) 4. High humidity 5. Low vertical wind shear 6. Optimal location for a typhoon
Lesson 2. •Typhoons are also affected by the condition of the land mass and the topography of the area where they land. Other factors that can affect the typhoons: Condition of land forms and seas Weather Forecast – it is based on the observed temperature, pressure, relative humidity, wind direction and precipitation of the preceding 24 hours. Weathers are changes from day to day.
Materials for predicting the weather: •Modern equipment, precise instruments, weather satellites and improve techniques of monitoring, gathering and interpreting weather information. •Weather radar is commonly used. - used for microwave radiation pulses to detect various degrees and forms of precipitation including light rain, heavy rain, snow and hailstones.
•Station model – using symbols and the data are gathered. 8 symbols of station mode; Air pressure, temperature ,cloud or sky cover, wind speed, wind direction, dew point, current weather, pressure tendency.
•Air pressure – is a measure of the force exerted by air on all objects. •Temperature – measure of the current. •Cloud or Cover sky – amount of the circle at the center of the station model is filled in reflects the approximate amount of the sky. •Wind speed and wind direction – are represented on the station model by a combination of a wind arrow.
•PAGASA- Philippine Atmospheric, Geophysical and Astronomical Services Administration. - it is a national institution tasked by the government to monitor and provide typhoon warnings, public weather forecast and advisories, meteorological, astronomical and climatological. Meteorologist- are the person who assigned by collecting the data.
•Weather map- it gives the summary of the weather condition all over the country. •All depressions, storms, and typhoons - are being closely observed and monitored by PAGASA within the PAR. PAR – Philippine Area of Responsibility. PSWS- Public Storm Warning Signals. - responsible for releasing tropical cyclone warnings.
• • • • SIGNAL # 1. SIGNAL # 2. SIGNAL # 3. SIGNAL # 4.
THANK YOU GEMINI FOR LISTENING!!! GOD BLESS EVERYONE!!!
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