Publications
2006
Fine and Coarse Content of PM10
Dynamics and Impact of El Nino and La Nina in Southeast Asia
Rainfall Patterns and Self-Organizing Maps
Metro Manila Particulate Matter Monitoring Network
Resolving Focal Mechanism Solution’s Ambiguity through Perturbation Applied to Mindoro Earthquakes
The problem of the present study is to determine which of the two planes of a Focal Mechanism Solution (FMS) is the fault plane. In order to resolve this problem of ambiguity in focal mechanisms, we use the method of perturbation of the...
Scientists Investigate Recent Philippine Landslide
A massive landslide devastated the community of Barangay Guinsaugon, Municipality of St. Bernard, Southern Leyte Province, Philippines, at about 10:30 local time on 17 February. The landslide occurred along the steep fault scarp of the Philippine Fault Zone (PFZ) (Figure 1a), a large...
2005
Forecasting Philippine Tropical Cyclone Tracks and Associated Precipitation using MM5: a Sensitivity Study
This study evaluates the skill of the PSU/NCAR mesoscale model (MM5) in predicting the storm tracks and associated precipitation during tropical cyclone events within the Philippine Area of Responsibility (PAR). Simulated storm tracks and accumulated rainfall forecasts of six tropical cyclones that occurred...
Continuously operated portable automated lidar (PAL): boundary layer observations in Chiba, Japan using automatic alignment system
A continuously operated portable automated lidar (PAL) is used to monitor the troposphere. The PAL system uses an automatic alignment procedure to routinely optimize the lidar alignment in a definite interval. Consequently, we demonstrate the capability of the system to detect atmospheric phenomena...
An Investigation of the Looping Track of Typhoon Muifa
Typhoon Muifa (Unding) caused considerable damage when it crossed the northern Bicol provinces and Southern Mindoro during the two-day period: November 19-20, 2004. The typhoon was remarkable because its movement was erratic, being characterized by a looping trajectory and other deviations from a...
PM2.5 and PM10 in 5 Metro Manila Sites
PM2.5 Source Identification through a Modified Potential Source Contribution Function (PSCF)
Decadal Change in Tropical Cyclone Activity in the Western Pacific
In view of the concern over of global warming and the spate of destructive tropical cyclones in recent months, there has been interest in finding a link between the two phenomena. Recently published papers (Emanuel 2005, Webster et al. 2005) showed that disturbances...
Rainfall patterns and Self-Organizing Feature Maps
This paper investigates the use of Self Organizing Feature Maps (SOFMs) as an objective method for classifying rainfall data to identify climate types. Results show that SOFMs are effective clustering tools for nonlinear climate data such as precipitation. [Presented at the Samahang Pisika...
A comparative study of boundary layer height measurement techniques using data from a continuously operated portable lidar (PAL)
Lidar data are used to measure the boundary layer height (BLH) of the atmosphere. In this paper, a comparative study among the basic methods (first and second derivatives and standard deviation) is done to get the BLH from a continuously-operated portable automated lidar...
A Comparative Study of Luzon Rainfall Simulations with the MM5 and the RegCM3 Models
The performance of the MM5 and the RegCM3 models in simulating total monthly rainfall has been evaluated. Total rainfall for the two months of June 2000 and June 2001 are simulated. June 2000 is a relatively dry month while June 2001 is a...
Comparative Analysis of Statistical Reduction and Classification Methods for Philippine Rainfall
Changing climatic conditions necessitate the updating of traditional climate classification schemes in the Philippines, which are based primarily on the Coronas Climate Atlas created in 1920. This study aims to establish an objective method for reducing rainfall data that is varying both in...
PM2.5 Source Identification through a Modified Potential Source Contribution Function (PSCF)
Receptor models based on the traditional mass balance approach provide quantified source identification and apportionment which does not include spatial/directional information of the sources. Application of trajectory-based models of which PSCF is a part of, easily mitigates such a problem. In the absence...
Climate Change Impacts and Adaptation on Philippine Coasts
Climate Change Impacts and Adaptation on Philippine Coasts
The Philippine archipelago, which has one of the longest coastlines in the world, will not be spared of the adverse impacts of sea-level rise and extreme climate events that are expected to happen in a warmer world. This study aims to review climate...