Martes, Enero 17, 2012

The Tail-end of a Cold Front

       The tail-end of a cold front is affecting Visayas and Mindanao while the northeast monsoon Ls affecting Luzon.We were affected by series of rains in the country. Which contribute to damage each life in the community. The economy of ours is affected. The development of the plants in the fields and even the business of simple people. It is all quit alarming. This phenomenon gave us different problems. And how I wish we can all solve this with the help and grace of God. Let us all do our part not only for ourselves but for everyone.
Linear Systems Description Associated Weather Period
Intertropical Convergence Zone (ITCZ)Result of the northern hemisphere and southern hemisphere tradewind convergenceWidespread cloudiness, occasional thunder-storms, precipitation, moderate to strong surface windsMigratory, depending on the time of the year
Tail-end of Cold FrontFront boundary of 2 air masses, found in mid-latitudesRainfall and cloudiness over affected areasNorthern portion of the country during the Northern Hemisphere winter season
Easterly WavesWavelike perturbations embedded in the easterly currentcloudiness and precipitation in eastern coastal portions More frequent during the transition period 

Intertropical Convergence Zone

           The Intertropical Convergence Zone (ITCZ), known by sailors as The Doldrums, is the area encircling the earth near the equator where winds originating in the northern and southern hemispheres come together.The ITCZ appears as a band of clouds, usually thunderstorms, that circle the globe near the equator. In the Northern Hemisphere, the trade winds move in a southwestern direction from the northeast, while in the Southern Hemisphere, they move northwestward from the southeast. When the ITCZ is positioned north or south of the equator, these directions change according to the Coriolis effect imparted by the rotation of the earth.
            We are now experiencing the change in our climate. Therefore, it may have a fair tomorrow nor a good one. ITCZ brings rain in the Earth because it brought the cloudiness, thunderstorms nor precipitates rain.On or near the equator, where average solar radiation is greatest, air is warmed at the surface and rises. This creates a band of low air pressure, centered on the equator. This rising air comprises one segment of a circulation pattern called the Hadley Cell. The rising air is replaced by the Trade winds approaching the equator from north and south. As the trade winds meet near the equator, surface convergence and uplift take place.