Rabu, 20 Mei 2009

Weather Monitoring Model Based on Satellite Data

Idung Risdiyanto

Staff in Geophysics and Meteorology Department, Faculty of Math and Natural Science, Bogor Agriculture University


Weather monitoring model is closely related to the problem of objective analysis of the field of meteorology. The amount of meteorological data is quite substantial and hence the processing of these data is one of primary problems is dynamic meteorology. Therefore, a weather system model must consider atmospheric process, which can be built by mechanistic model rather than statistical approach. Integration of numerical model (as mechanistic model) and spatial model will produce spatial weather information. It should be managed in one computerized system called as an information system for weather monitoring. The approach of the research was divided into five tasks. First task was satellite data capturing and extracting, second task was development of numerical modeling based on dynamic and thermodynamic of atmospheric process, third task was integration of numerical modeling and geographic information system in the spatial model, fourth task was to develop graphical user interface and the fifth task was application of system in the real-world. This research did not conduct model validation, due to limitation of measured data such as those were by radio-sonde and time constraint. As a model, it has some weakness such as temporal resolution, spatial resolution and vertical distribution process of atmosphere. Temporal resolution of this model is one day, however, in reality, weather is temporal state of atmosphere condition that change any time. Moreover, this model only describes weather condition when data satellite on the day could be captured. Therefore, to increase the temporal resolution of this model, the input data could be added or integrated with other satellite data such as GMS satellite that has one-hour temporal resolution. Spatial resolution that was used in this model is 50x50 kilometers square for global area and 8x8 kilometers for regional area. Actually, for the spatial resolution, this model has been prepared as NOAA’s spatial resolution. However, in this research, the computer processor and memory is not adequate to run the software in NOAA’s spatial resolution. Therefore, it is highly recommended to use more powerful computer system. This model cannot simulate vertical distribution of atmosphere, so, it does not give information about relative humidity and precipitation. If air movement in vertical area could be simulated, the dew point temperature and lighting condensation level would be known therefore the relative humidity and precipitation could be predicted.

Keywords : spatial model, information system, resolution, atmosphere (Full Paper)