Chou Chien-BenCentral Weather Bureau, Taiwan · Meteorological Satellite Center
Chou Chien-Ben
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11
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Introduction
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Publications
Publications (11)
The monitoring of droughts is practically important yet challenging due to the complexity of the phenomena. The occurrence of drought involves changes in meteorological conditions, vegetation coverage and soil moisture. To advance the techniques for detecting and monitoring droughts, this study explores the usage of a suite of vegetation and water...
As the new-generation geostationary satellite Himawari-8 provides a greater frequency and more observation channels than its predecessor, the Multifunctional Transport Satellite (MTSAT-2), an opportunity arises to generate atmospheric motion vectors (AMVs) with an increased accuracy and extensive distribution over eastern Asia. In this work AMVs we...
We investigated the impact of assimilating microwave radiances from the Advanced Microwave Sounding Unit-A (AMSU-A) and the Microwave Humidity Sounder (MHS) into the Hurricane Weather Research and Forecasting (HWRF) model on the forecast of typhoon tracks over the western Pacific Ocean. The assimilation of MHS observations has positive impacts on t...
This work assesses the effects of assimilating atmospheric infrared sounder (AIRS) observations on typhoon prediction using the three-dimensional variational data assimilation (3DVAR) and forecasting system of the weather research and forecasting (WRF) model. Two major parameters in the data assimilation scheme, the spatial decorrelation scale and...
In this study, the Advanced Microwave Sounding Unit (AMSU) data are used to retrieve the temperature and velocity fields of typhoons and assimilate them with the three-dimensional variational data assimilation (3DVAR) routines for uses in numerical model predictions for typhoons. The authors' procedure of an end-to-end typhoon prediction using an A...
An accurate estimate of observation errors is crucial to the retrieval of atmospheric profiles from satellite data using a variational method. In practice, observation errors, both systematic and random, are often estimated from the difference between satellite observations and simulated satellite observations obtained from a radiative-transfer ope...
The Advanced Microwave Sounding Unit (AMSU) data is useful for retrieving the parameters of typhoons because the AMSU observations are high resolution and are not subject to the obstruction of cloud. The three-dimensional rotational wind component associated with a typhoon can be obtained by solving the nonlinear balance equation using the retrieve...
The use of the Advanced Very High Resolution Radiometer (AVHRR) data in a one-dimensional variational scheme is examined to retrieve cloud parameters and atmospheric profiles. The variational scheme used TIROS Operational Vertical Sounder radiance data for retrieval. The AVHRR data were used in the partly cloudy and cloudy cases to provide initial...
Since most of AMSU channels have a beam position-dependent bias, it is crucial to remove such a bias for providing useful profiles of the atmosphere. Measurement errors are estimated from the differences between satellite observations and the simulated satellite observations, which were obtained from a radiative transfer operator with 12-hours fore...
Satellite-data derived total precipitable water (kg/m 2) is the amount of water vapor in the atmospheric column from the surface of the earth to space. The microwave instruments SSMI/S, AMSRE and AMSU can be used to retrieve this parameter that could be useful in relation to heavy precipitation. The MIRS products, developed by NESDIS, were used as...