The effect on adding NCEP reanalysis data to simulate wind field in Taiwan region by using CALMET model
Date Issued
2011
Date
2011
Author(s)
Li, Ren-Yu
Abstract
For the overwater stations data not to use in the past, this study applied NCEP (Nation Center Environment of Prediction) reanalysis data to treat as the model simulations date of virtuals station on the boundary.
This study explored the application of the NCEP reanalysis data in the CALMET model simulations of the impact of wind field in Taiwan region. There compared to four-part work. In the first the study simulate wind field which divided into horizontal and vertical wind field. The second part is compare simulation results with EPA & CWB stations actual monitoring data. In order to understand the accuracy of model simulations, in the third part is the error and correlation analysis. It allows researcher to understand how the error analysis and add NCEP reanalysis data to effect wind field simulation in Taiwan region. The last part is the forward trajectory analysis. In order to understand the divergence in added NCEP reanalysis data simulation results of forward trajectory analysis.
In the simulation of the wind field, near-surface layer of the horizontal wind field simulation mainly effects of simulated wind field near the simulation boundary of the sea. In the island region of the wind field affected slightly. In the vertical wind field, it becomes obvious that the case with the sinking of the mountain.
In the simulation result of the validation, CALMET model simulated wind speed which conform to reality the monitor results in the off-shore islands in most of the time. It is less conform to reality the monitor results for simulation results in the Taipei station. In the wind direction simulation, the biggest difference is the location near the simulation boundary of the sea. In error and correlation analysis, this study does not recommend to use of variable-sweep radius of Taiwan simulated wind field. The fifth group in this study to use the scanning radius which suitable to treat as simulation control parameters for Taiwan Island and the outlying islands of the wind field simulate. Finally, the forward trajectory analysis result which the path is very distinct, it will affect to distinguish the transmission path of the pollutants.
Subjects
forward trajectory
SDGs
Type
thesis
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