Based on tidal data statistical analysis for 20 years of Tanggu Marine Environmental Monitoring Station from 1991 to 2010, we concluded that an average of nearly 10 days of 100 cm above water increase took place at Ti...Based on tidal data statistical analysis for 20 years of Tanggu Marine Environmental Monitoring Station from 1991 to 2010, we concluded that an average of nearly 10 days of 100 cm above water increase took place at Tianjin coast every year. The maximum high tide and average tide of Tianjin coast occurred in summer and autumn, and the maximum water increase also occurred in summer and autumn. Days with water increase more than 100 cm mostly occurred in spring, autumn and winter. Then we summarized the causes of coastal storm surge disaster in Tianjin based on astronomical tide factors, meteorological factors, sea level rise, land subsidence, and geographic factors, et al. Finally, we proposed storm surge disaster prevention measures.展开更多
Based on prediction data of T213 and ECMWF and historical information of tropical cyclone,the causes of long lasting and large scale rainstorm brought by Nesat in Guangxi were analyzed.Nesat,of high intensity,carried ...Based on prediction data of T213 and ECMWF and historical information of tropical cyclone,the causes of long lasting and large scale rainstorm brought by Nesat in Guangxi were analyzed.Nesat,of high intensity,carried much vapor and energy and went through Beibu Gulf by subtropical high pressure.After Nesat made landfall,subtropical high pressure maintained high and gradient between typhoon circulation and subtropical high pressure increased;the typhoon was supported by abundant vapors and energies by powerful eastern flows.Furthermore,northern cold airs went downward and met southeast wind behind of the typhoon,resulting in shears and convective precipitation.Therefore,the rains brought by the typhoon itself,jet stream,and cold air contributed to long lasting rainfall under influence of Nesat.展开更多
文摘Based on tidal data statistical analysis for 20 years of Tanggu Marine Environmental Monitoring Station from 1991 to 2010, we concluded that an average of nearly 10 days of 100 cm above water increase took place at Tianjin coast every year. The maximum high tide and average tide of Tianjin coast occurred in summer and autumn, and the maximum water increase also occurred in summer and autumn. Days with water increase more than 100 cm mostly occurred in spring, autumn and winter. Then we summarized the causes of coastal storm surge disaster in Tianjin based on astronomical tide factors, meteorological factors, sea level rise, land subsidence, and geographic factors, et al. Finally, we proposed storm surge disaster prevention measures.
文摘Based on prediction data of T213 and ECMWF and historical information of tropical cyclone,the causes of long lasting and large scale rainstorm brought by Nesat in Guangxi were analyzed.Nesat,of high intensity,carried much vapor and energy and went through Beibu Gulf by subtropical high pressure.After Nesat made landfall,subtropical high pressure maintained high and gradient between typhoon circulation and subtropical high pressure increased;the typhoon was supported by abundant vapors and energies by powerful eastern flows.Furthermore,northern cold airs went downward and met southeast wind behind of the typhoon,resulting in shears and convective precipitation.Therefore,the rains brought by the typhoon itself,jet stream,and cold air contributed to long lasting rainfall under influence of Nesat.
