Using real analysis data of 1°×1° resolution of the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),the nondivergent wind component and irrotational win...Using real analysis data of 1°×1° resolution of the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),the nondivergent wind component and irrotational wind component obtained by the harmonic-cosine(H-C) method,and the wind structure of Typhoon Fung-Wong (coded 0808 in China) in 2008 was analyzed. The results indicated that the irrotational component was advantageous over the total wind in reflecting both the changes in convergent height and the asymmetrical convergence of Fung-Wong. In Fung-Wong,the nondivergent component was larger than the irrotational component,but the latter was much more variable than the former,which was obtained only from the wind partition method. Further analyses on the irrotational component demonstrated that the location of the convergent center at lower levels was almost the same as the divergent center during the development of Fung-Wong,and its convergent level was high in its life cycle,with the most highest up to 400 hPa when it became stronger. After the typhoon landed in the provinces of Taiwan and Fujian,respectively,its convergent center at lower levels was slowly detached from the divergent center at high levels and the convergent height was also depressed from high levels to lower levels. Gradually,this weakened the intensity of Fung-Wong. This kind of weakening was slow and Fung-Wong maintained its circulation for a long time over land because of its very thick convergent height. Analyses on wind partitioning provided one possible explanation to why Fung-Wong stayed for a long time after it landed. Furthermore,the asymmetric vertical ascending motion was induced by the asymmetric convergence at lower levels. In general,when typhoons (such as Fung-Wong) land,the rainfall region coincides with that of the convergence region (indicated by the irrotational component at lower layers). This means that the possible rainfall regions may be diagnosed from the convergent area of the irrotational component. For an observational experiment on typhoons,the convergent region may be considered as a key observational region.展开更多
Jade Snow Wong was one of the most famous literary writers to recount the complexity of cross-cultural experiences as Americans became sympathetic toward Chinese at the historic juncture of WWII. Her autobiography, Fi...Jade Snow Wong was one of the most famous literary writers to recount the complexity of cross-cultural experiences as Americans became sympathetic toward Chinese at the historic juncture of WWII. Her autobiography, Fifth Chinese Daughter, once represented early immigrants＇ assimilationist position, yet it was lately reread for the strength of her Chinese heritage in a multicultural American society. To interpret the cultural value of Chinese existence in America, this article analyzes the historic contexts of her story, and argues that her life experiences provide insights into fresh meanings of multiculturalism for various ethnic groups, as well as into the particular importance of Chinese American culture in connecting separate worlds within the world of America.展开更多
基金State Key Development Program for Basic Research of China (2009CB421505)Project of the Ministry of Sciences and Technology of the People’s Republic of China (GYHY200706020)+1 种基金Projects of the Natural Science Foundation of China (40975034, 40775031)Open Project of State Key Laboratory of Severe Weather (2008LASW-A01)
文摘Using real analysis data of 1°×1° resolution of the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),the nondivergent wind component and irrotational wind component obtained by the harmonic-cosine(H-C) method,and the wind structure of Typhoon Fung-Wong (coded 0808 in China) in 2008 was analyzed. The results indicated that the irrotational component was advantageous over the total wind in reflecting both the changes in convergent height and the asymmetrical convergence of Fung-Wong. In Fung-Wong,the nondivergent component was larger than the irrotational component,but the latter was much more variable than the former,which was obtained only from the wind partition method. Further analyses on the irrotational component demonstrated that the location of the convergent center at lower levels was almost the same as the divergent center during the development of Fung-Wong,and its convergent level was high in its life cycle,with the most highest up to 400 hPa when it became stronger. After the typhoon landed in the provinces of Taiwan and Fujian,respectively,its convergent center at lower levels was slowly detached from the divergent center at high levels and the convergent height was also depressed from high levels to lower levels. Gradually,this weakened the intensity of Fung-Wong. This kind of weakening was slow and Fung-Wong maintained its circulation for a long time over land because of its very thick convergent height. Analyses on wind partitioning provided one possible explanation to why Fung-Wong stayed for a long time after it landed. Furthermore,the asymmetric vertical ascending motion was induced by the asymmetric convergence at lower levels. In general,when typhoons (such as Fung-Wong) land,the rainfall region coincides with that of the convergence region (indicated by the irrotational component at lower layers). This means that the possible rainfall regions may be diagnosed from the convergent area of the irrotational component. For an observational experiment on typhoons,the convergent region may be considered as a key observational region.
文摘Jade Snow Wong was one of the most famous literary writers to recount the complexity of cross-cultural experiences as Americans became sympathetic toward Chinese at the historic juncture of WWII. Her autobiography, Fifth Chinese Daughter, once represented early immigrants＇ assimilationist position, yet it was lately reread for the strength of her Chinese heritage in a multicultural American society. To interpret the cultural value of Chinese existence in America, this article analyzes the historic contexts of her story, and argues that her life experiences provide insights into fresh meanings of multiculturalism for various ethnic groups, as well as into the particular importance of Chinese American culture in connecting separate worlds within the world of America.
