>> Project Description: The objective of this task is to design, develop, and implement an interactive web-based application to generate and display both forward and backward trajectories of individual hypothetical air parcels. The web-based application will prompt the user for the necessary input information (i.e., geographic location, start time of trajectory, input meteorological dataset). The information provided by the user will then be exported from the web server to the trajectory calculation software that accesses the database archive of meteorological observations and forecasts. The results of the trajectory calculation will be displayed over a geographic map. The trajectories based on historical data will be calculated from observations surface monitoring network. Prognostic trajectories will be calculated from forecast data provided by daily runs of the Fifth Generation Pennsylvania State University/National Center for Atmospheric Research (PSU/NCAR) Mesoscale Model (MM5). The MM5 is a non-hydrostatic, terrain-following sigma coordinate model used to simulate or predict regional-scale meteorology. The MM5 has been used in support of numerous air quality studies in Texas, including the September 15-20, 1999 episode currently being developed for the Texas Joint Near Nonattainment Areas.

>> The goals of this research are:
- Development of the screening near-real time trajectory tool.
- Development of the trajectory analysis system that allows operation of the both the automatic generation of the predefined trajectory analysis and the user driven trajectory analysis.
- Development of a database archiving system to allow access of the objective analyzed wind filed data of the observations.
- Development of the MM5 forecasting system to provide predicted wind fields for the forward trajectory analysis.

>> Requirement: Flash Player is required to view the interactive web interface. More than 90% of PCs in the world has this software installed.
- Click the "Enter Here" bellow to launch the trajectory-web-interface.
- If the "Enter Here" button does not respond properly. Please download Flash Player free at www.macromedea.com.

ENTER HERE