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- The 1990–91 South Pacific cyclone season was one of the least active tropical cyclone seasons on record, with only two tropical cyclones occurring within the South Pacific basin to the east of 160°E. The season officially ran from November 1, 1990 to April 30, 1991, with the first disturbance of the season forming on November 23, 1990, while the final disturbance dissipated on May 19, 1991. During the season there were no deaths recorded from any of the tropical cyclones while they were within the basin. However, six people were killed by Cyclone Joy, when it made landfall on Australia. As a result of the impacts caused by Joy and Sina, the names were retired from the tropical cyclone naming lists. During the season, tropical cyclones were monitored by the Fiji Meteorological Service and the New Zealand MetService, while other meteorological services such as the Australian Bureau of Meteorology, Meteo France as well as the United States Joint Typhoon Warning Center and Naval Western Oceanography Center (NWOC) also monitored the basin. The JTWC issued warnings between 160°E and the International Date Line, while the NWOC issued warnings for tropical cyclones forming between the International Date Line and the coasts of the Americas. Both the JTWC and the NWOC designated tropical cyclones with a number and either a P suffix with numbers assigned in order to tropical cyclones developing within the whole of the Southern Hemisphere. The FMS, MetService and the BoM all used the Australian Tropical Cyclone Intensity Scale and estimate wind speeds over a ten-minute period, while the JTWC estimated sustained winds over a one-minute period, which are subsequently compared to the Saffir–Simpson hurricane wind scale (SSHWS). (en)
- 1990－1991年南太平洋气旋季是有纪录以来活跃程度最低的南太平洋气旋季之一，赤道以南、东经160°以东的南太平洋盆地内只形成3个热带气旋。气旋季于1990年11月1日正式开始，次年4月30日结束，传统上这样的日期界定了绝大多数热带气旋在南太平洋形成的时间段。全季第一个热带扰动于1990年11月23日形成，最后一个则在1991年5月19日消散。整个南太平洋范围内没有任何人因热带扰动丧生，但气旋乔伊登陆澳大利亚期间夺走了6人的生命。气旋西纳对斐济和汤加造成价值至少1850万美元（1991年美元）的破坏，是全季唯一一场在南太平洋盆地造成破坏的热带气旋。由于气旋乔伊和西纳产生的影响，两个名称也因此退役，今后永远都不会再在南太平洋热带气旋命名时采用。 气旋季期间，位于楠迪的斐济气象局热带气旋警报中心和惠灵顿的热带气旋警报中心负责监控行经或在南太平洋形成的热带气旋，两机构也是南太平洋的区域专责气象中心。澳大利亚气象局会对进入东经160°以西（澳大利亚海域）的热带气旋进行监控。美国联合台风警报中心和海军西部海洋学中心都会针对南太平洋的热带气旋发布警报，但两机构的警报不具备正式地位。联合台风警报中心会针东经160°至国际日期变更线之间的热带气旋发布警报，海军西部海洋学中心则会对国际日期变更线以东，南、北美洲以西的热带气旋发布警报。联合台风警报中心和海军西部海洋学中心为热带气旋编号时都会在数字后面加上后缀字母“P”，数字从1开始，按整个南半球范围内热带气旋的形成时间先后排序。斐济气象局和新西兰气象服务有限公司热带气旋警报中心都采用澳大利亚热带气旋强度分级，以10分钟持续风速衡量热带气旋强度，联合台风警报中心和海军西部海洋学中心则采用1分钟持续风速和萨菲尔-辛普森飓风等级。 (zh)
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- Timeline of the 1990–91 South Pacific cyclone season (en)
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- Sina 1990 track.png (en)
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- The 1990–91 South Pacific cyclone season was one of the least active tropical cyclone seasons on record, with only two tropical cyclones occurring within the South Pacific basin to the east of 160°E. The season officially ran from November 1, 1990 to April 30, 1991, with the first disturbance of the season forming on November 23, 1990, while the final disturbance dissipated on May 19, 1991. During the season there were no deaths recorded from any of the tropical cyclones while they were within the basin. However, six people were killed by Cyclone Joy, when it made landfall on Australia. As a result of the impacts caused by Joy and Sina, the names were retired from the tropical cyclone naming lists. (en)
- 1990－1991年南太平洋气旋季是有纪录以来活跃程度最低的南太平洋气旋季之一，赤道以南、东经160°以东的南太平洋盆地内只形成3个热带气旋。气旋季于1990年11月1日正式开始，次年4月30日结束，传统上这样的日期界定了绝大多数热带气旋在南太平洋形成的时间段。全季第一个热带扰动于1990年11月23日形成，最后一个则在1991年5月19日消散。整个南太平洋范围内没有任何人因热带扰动丧生，但气旋乔伊登陆澳大利亚期间夺走了6人的生命。气旋西纳对斐济和汤加造成价值至少1850万美元（1991年美元）的破坏，是全季唯一一场在南太平洋盆地造成破坏的热带气旋。由于气旋乔伊和西纳产生的影响，两个名称也因此退役，今后永远都不会再在南太平洋热带气旋命名时采用。 (zh)
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- 1990–91 South Pacific cyclone season (en)
- 1990－1991年南太平洋气旋季 (zh)
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