Friday, August 3, 2012

Monsoon


I learned that monsoon is traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation,but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea.Usually, the term monsoon is used to refer to the rainy phase of a seasonally-changing pattern, although technically there is also a dry phase. Monsoons may be considered as large-scale sea breezes, due to seasonal heating and the resulting development of a thermal low over a continental landmass. They are caused by the larger amplitude of the seasonal cycle of land temperature compared to that of nearby oceans. This differential warming happens because heat in the ocean is mixed vertically through a "mixed layer" that may be fifty metres deep, through the action of wind and buoyancy-generated turbulence, whereas the land surface conducts heat slowly, with the seasonal signal penetrating perhaps a metre or so. There are two monsoons that we experience here in the Philippines; the northeast monsoon and southwest monsoon. The Northeast monsoon locally known as "Amihan". It affects the eastern portions of the country from October up to late March, starts over Siberia as a cold, dry air mass but gathers moisture as it travels across the Pacific Ocean before reaching the eastern sections of the Philippines is characterized by widespread cloudiness with rains and showers. The North Pacific Trades gradually replaces the NE Monsoon in March, appears in all seasons and blows dominantly from March to April, giving strong convective activity. The southwest monsoon locally known as "Habagat", it affects the country from July to September, is very warm and humid, occurs when warm  moist air. I want to know more about how they were formed and how they affect one place as they occur. I would like to research on how we can lessen the effect it may brought. I can apply my learning and insights in my daily living for example decide about our outings, I can avoid the time when they are usually experienced to prevent unnecessary things to happen.

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