In this paper we give a review of several previously published papers on anomalous tremors observed before the 2008 Ms8.0 Weuchuan earthquake. Based on the observed time and frequency shifts between coastal and inland...In this paper we give a review of several previously published papers on anomalous tremors observed before the 2008 Ms8.0 Weuchuan earthquake. Based on the observed time and frequency shifts between coastal and inland stations, we discussed some methods to distinguish different kinds of microseisms, and speculated that a pre-earthquake typhoon might have caused a ＂mainland-originated microseism＂ which in turn trig- gered the earthquake.展开更多
Storm surges are abnormal rises in sea level along coastal areas and are mainly formed by strong wind and atmospheric depressions. When storm surges coincide with high tide, coastal flooding can occur. Creating storm ...Storm surges are abnormal rises in sea level along coastal areas and are mainly formed by strong wind and atmospheric depressions. When storm surges coincide with high tide, coastal flooding can occur. Creating storm surge prediction systems has been an important and operational task worldwide. This study developed a coupled tide and storm surge numerical model of the seas around Taiwan for operational purposes at the Central Weather Bureau. The model was calibrated and verified by using tidal records from seas around Taiwan. Model skill was assessed based on measured records, and the results are presented in details. At 3-minute resolution, tides were generally well predicted, with the root mean-square errors of less than 0.11 m and an overall correlation of more than 0.9. Storms （winds and depressions） were introduced into the model forcing by using the parameter typhoon model. Five typical typhoons that threatened Taiwan were simulated for assessment. The surges were well predicted compared with the records.展开更多
基金supported by the National Natural Science Foundation of China(90814009)Quality Control’s Special Funds for Scientific Researchon Public Causes(10-215)National Key Technology Research and Development Program(2008BAC35B05)
文摘In this paper we give a review of several previously published papers on anomalous tremors observed before the 2008 Ms8.0 Weuchuan earthquake. Based on the observed time and frequency shifts between coastal and inland stations, we discussed some methods to distinguish different kinds of microseisms, and speculated that a pre-earthquake typhoon might have caused a ＂mainland-originated microseism＂ which in turn trig- gered the earthquake.
文摘Storm surges are abnormal rises in sea level along coastal areas and are mainly formed by strong wind and atmospheric depressions. When storm surges coincide with high tide, coastal flooding can occur. Creating storm surge prediction systems has been an important and operational task worldwide. This study developed a coupled tide and storm surge numerical model of the seas around Taiwan for operational purposes at the Central Weather Bureau. The model was calibrated and verified by using tidal records from seas around Taiwan. Model skill was assessed based on measured records, and the results are presented in details. At 3-minute resolution, tides were generally well predicted, with the root mean-square errors of less than 0.11 m and an overall correlation of more than 0.9. Storms （winds and depressions） were introduced into the model forcing by using the parameter typhoon model. Five typical typhoons that threatened Taiwan were simulated for assessment. The surges were well predicted compared with the records.
