In 1998, the annual frequency of typhoon (including tropical storms) genesis created a minimum value — 14, far lower than the minimum of 20 in 1950 over North-West Pacific, while in the Atlantic Ocean, the annual fre...In 1998, the annual frequency of typhoon (including tropical storms) genesis created a minimum value — 14, far lower than the minimum of 20 in 1950 over North-West Pacific, while in the Atlantic Ocean, the annual frequency of hurricanes (including the tropical storm) created a maximum value — 14, far higher than the average number — 9.2. In this paper, an analysis on the relationship between the generation of Typhoon, Hurricane and the Cross-Equatorial Flow was done by using the NCEP/NCAR reanalysis data for 1979 – 1995. It is pointed out that the anomalies of the CEF over the Pacific and Atlantic Ocean is the main cause for the 1998 annual frequency anomalies of Typhoon and Hurricane, respectively.展开更多
The sustained rainfall process on May 13-22, 2004 was one of the pre-summcr rainy periods in the south of China. It was related with the genesis and development ofa SW monsoon surge over the Bay of Bengal. From the sy...The sustained rainfall process on May 13-22, 2004 was one of the pre-summcr rainy periods in the south of China. It was related with the genesis and development ofa SW monsoon surge over the Bay of Bengal. From the synoptic analysis it is found that the genesis and development of the SW monsoon surge may be dividod approximately into the initial, developing and decaying stages. During the rainfall the Southern Hemisphere cross-equatorial flow over the Indian Ocean plays a triggering role.展开更多
基金Research on Short-term Climatic Prediction Systems in China - a core scientific project inthe 9th five-year economic development plan Century-bridging Youth Academic Research Backbones from theChinese Academy of Meteorological Sciences
文摘In 1998, the annual frequency of typhoon (including tropical storms) genesis created a minimum value — 14, far lower than the minimum of 20 in 1950 over North-West Pacific, while in the Atlantic Ocean, the annual frequency of hurricanes (including the tropical storm) created a maximum value — 14, far higher than the average number — 9.2. In this paper, an analysis on the relationship between the generation of Typhoon, Hurricane and the Cross-Equatorial Flow was done by using the NCEP/NCAR reanalysis data for 1979 – 1995. It is pointed out that the anomalies of the CEF over the Pacific and Atlantic Ocean is the main cause for the 1998 annual frequency anomalies of Typhoon and Hurricane, respectively.
基金Research Fund for National Basic Research "The Theory and Method to Monitor and ForecastRainstorms Causing Floods in South China" (2004CB418305)
文摘The sustained rainfall process on May 13-22, 2004 was one of the pre-summcr rainy periods in the south of China. It was related with the genesis and development ofa SW monsoon surge over the Bay of Bengal. From the synoptic analysis it is found that the genesis and development of the SW monsoon surge may be dividod approximately into the initial, developing and decaying stages. During the rainfall the Southern Hemisphere cross-equatorial flow over the Indian Ocean plays a triggering role.
