A ground based scanning lidar was used for the first time in the Philippines to observe early stages of the convective boundary layer (CBL) growth. Two days of observations were done (March 16 and 17, 2003) at the Manila Observatory, Katipunan. The scanning...
A theoretical study of diurnal variations of NO2 concentrations in the air is conducted to verify the observations at the Manila Observatory inside the Ateneo de Manila Campus (Quezon City, Philippines) in June and August 2002. The analysis of the observations shows that...
A 280m open-path DOAS instrument was constructed. A folded-path configuration employing retroreflectors was chosen for advantages in sensitivity and convenience in instrument alignment and housing. An annular illumination single-telescope transceiver was used to reduce cost and system complexity. Data gathering was performed during...
The Fifth-generation PSU/NCAR Mesoscale Model (MM5) was used to predict tropical cyclone tracks that developed near the Philippines in 2003. The model’s sensitivity to the parameterization schemes for the cumulus, planetary boundary layer and explicit moisture was investigated to determine the optimal model...
Inertial impaction theory was used in the design and construction of a prototype PM 2.5 aerosol sampler. This prototype, consisting of just an impaction stage and a pump to move air through it, was subjected to collocation tests with MiniVolTM samplers at different...
A June climatological distribution of rainfall for Luzon has been constructed. The method of construction consists of combining two types of rainfall values: theoretical values from simulations with an atmospheric model and observed values at rain gauge stations. The method has been applied...
In response to the serious implications of changes in the local climate, this study describes the temporal and spatial rainfall variability in the Philippines. Precipitation and wet-day frequency are obtained from the 0.5-degree resolution gridded dataset of monthly surface climate of global land...
A method for developing a high resolution, accurate gridded, rainfall data for the Philippines is described. The method is based on combining three types of climatological rainfall information. The first type consists of gridded data which are obtained by using rainfall simulations with...
Observations of NO2 at the Manila Observatory in the Ateneo de Manila Campus (Quezon City, Philippines) are analyzed. These have been made with a Differential Optical Absorption Spectroscope (DOAS) during the two months of June and August 2002. The analysis shows that the...
This study investigates the changes in the surface temperature and wind field due to the possible southward growth of the Metro Manila urban area. Twenty days in April 2002 are simulated using the Fifth-Generation PSU/NCAR Mesoscale Model (MM5). In order to isolate the...
Climate studies call for more localized climate scenarios. The scarcity of high-resolution scenarios is a problem, however. To address this problem, we aimed to construct an artificial neural network (ANN) that performs climate downscaling for an area in Luzon, Philippines. In this paper,...
The paper is a summary of the more important factors affecting sea level rise. Geodynamic factors are elaborated and explained, based on numerous studies affecting such phenomena. The contributions of time varying, temperature dependent factors are explicitly discussed and elaborated, and some related...
The changes in rainfall patterns, which evolve during the growth in size of a tropical urban area, are studied by means of model simulations. The urban area is located along a coastline. The simulated rainfall is produced by mesoscale disturbances during the rainy...
This paper is an initial research on a high-resolution model of the mesoscale circulations over Metro Manila using the Fifth-Generation PSU/NCAR Mesoscale Model (MM5). Two days in April 2002 characterized by a calm prevailing wind were simulated. The model indicated the occurrence of...
The possibility of predicting rainfall anomalies in the Philippines due to El Niño and La Niña is investigated. The data used in the investigation consist of rain gauge observations, satellite-derived rainfall and sea surface temperatures in the Central Pacific Ocean. The investigation is...
General Circulation Model based on the Special Reports on Emissions Scenarios are downscaled in order to determine future possible climate conditions in the Philippines.
The diurnal variation of air pollution over Metro Manila is studied by means of model simulations. The model equations are based on the fluid dynamical equations. The equations are integrated for the case when the prevailing wind is calm and with a prevailing...
Remote sensing of the atmosphere using Global Positioning Systems has been made possible with the derivation of the precipitable water vapor (PWV) from the tropospheric wet delay experienced by the signal propagation. Although limited by the missing observational data from the receiver, it...
Having successfully implemented the PSU/NCAR Mesoscale Model 5 (MM5) in the Agila Beowulf cluster of Ateneo, the Atmospheric Modeling Group (AMG) of the Manila Observatory was able to make several test runs on the Luzon island domain (12.2 deg to 18.8 deg latitude,...
The pollution patterns due to discharges from a marine outfall in the coastal waters of Southern Lingayen Gulf are studied. The variations of these patterns corresponding to different prevailing winds are obtained by using a mathematical model of the Gulf. The model equations...