Effects of air pollution on Metro Manila's precipitation cycle
Abstract
Atmospheric aerosols serve as cloud condensation nuclei that affect the formation of cloud droplets, thus they influence cloud formation which in turn affect precipitation. In this study, the diurnal precipitation cycle of Metro Manila in a 4 km grid-spacing cloud-resolving configuration was simulated with and without aerosol feedback effects using a regional chemical transport model WRF-Chem. The diurnal precipitation cycle for the month of July (of 2009 to 2012), which is one of the wettest months of Metro Manila, showed late morning rain suppression and prolonged evening precipitation. Precipitation suppression was mainly due to fine particulate urban anthropogenic emission from the morning emissions. As the ground solar heating intensifies into the afternoon, coarse seasalt aerosols are carried by sea breeze inland and is ingested by existing clouds, which results in the stimulation of the conversion process of cloud droplets to raindrops.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
