2 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.% of the mass of the atmosphere.
3 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.
4 Jet Streamy – it is beneath the tropopause, the river of air that zooms along at the speed of 400 km per hour.Conduction and Convection- the earth is primarily warmed by the sun’s radiation and the energy transferred to one another.Convection- warm, moist of air mixes with cold air.
5 Tropical Cyclone originates in the oceans about 300 miles or 500 km away from the equator. Another term for Tropical Cyclone.- Typhoon or HurricaneHurricane – is at east of 160 degrees latitude.Typhoon – is on the west of the International Dateline.They are also the same phenomena.
6 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 TyphoonAbundanceSimilarity
7 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.
8 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:Abundance of warm waterOcean water temperature of 26.5 degree celsius (79.7 degrees fareinheight)
9 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
10 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 seasWeather 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.
11 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.
12 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.
13 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.
14 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.
15 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.