Precipitation: Spatial Distribution (ABEN 55) PDF

ABEN 55 PRECIPITATION: SPATIAL DISTRIBUTION Engr. Melrose M. Salona, MSc  also water cycle cycle that involves the continuous circulation of water in the Earth- atmosphere system  Precipitation is water being released from clouds as rain, sleet, snow, or hail. Precipit...

ABEN 55 PRECIPITATION: SPATIAL DISTRIBUTION Engr. Melrose M. Salona, MSc  also water cycle cycle that involves the continuous circulation of water in the Earth- atmosphere system  Precipitation is water being released from clouds as rain, sleet, snow, or hail. Precipitation begins after water vapor, which has condensed in the atmosphere, becomes too heavy to remain in atmospheric air currents and falls.  About one-fourth of the total precipitation that falls on continental areas is turned to the seas by direct runoff and underground. The rainfall pattern in the Philippines is affected by the major air streams, by the movement of the ITCZ, and by the cyclonic disturbances.  The Philippines receives an average of 965 to 4,064 millimeters of rainfall every year. However, this amount is not evenly distributed over time and space. The country has a mean annual number of about 175 rainy days.  A large majority of the stations in the eastern coastal areas have mean annual of rainy days more than the average for the Philippines while the majority of the stations in the western coastal areas have values less than the average.  The process of water changing deposition of liquid water from a vapor to a liquid droplets and ice particles that are formed in the atmosphere Water vapor in the air rises mostly by convection (warm, humid air and grow to a sufficient size so will rise, while cooler air will flow that they are returned to the downward) Earth's surface by gravitational settling. As the warmer air rises, the water vapor will lose energy, causing its temperature to drop may be solid or liquid The water vapor then has a change of state into liquid cooling of the air mass sufficient to bring it to or near saturation presence of condensation or freezing nuclei on which the droplets or crystals form growth of water droplets and ice crystals until their falling speeds exceed the ascent rate of the air drizzle rime hydrometeor Any product of condensation of rainfall snow atmospheric water vapor formed in the free air or at earth’s surface glaze sleet hail drizzle or mist rain tiny liquid water droplets, 0.1 to consists of liquid water drops 0.5 mm in diameter; it falls at a mostly larger than 0.5 mm in rate of