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The 1991–92 South Pacific cyclone season was an above average tropical cyclone season, with eleven tropical cyclones occurring within the South Pacific basin between 160°E and 120°W. The first tropical cyclone of the season was first noted on November 13, 1991, while the last tropical cyclone dissipated on May 2, 1992. During the season at least 21 people were killed by tropical cyclones, while Tropical Cyclones Cliff and Innis were the only tropical cyclones not to cause any damage to any country in the Southern Pacific. During the season, tropical cyclones were monitored by the Tropical Cyclone Warning Centers (TCWC) in Nadi, Fiji, and in Wellington, New Zealand.〔TCWC Nadi warned on systems in the South Pacific located from the Equator to 25°S and from 160°E to 120°W. TCWC Wellington warns on systems from 25°S to 40°S and from 160°E to 120°W〕 Whilst tropical cyclones that moved or formed to the west of 160°E were monitored as a part of the Australian region by the Australian Bureau of Meteorology. Both the United States Joint Typhoon Warning Center (JTWC) and the Naval Western Oceanography Center (NWOC) issued unofficial warnings within the southern Pacific. The JTWC issued warnings between 160°E and the International Date Line whilst 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 a P suffix with numbers assigned in order to tropical cyclones developing within the whole of the South Pacific. TCWC Nadi and TCWC Wellington both use the Australian Tropical Cyclone Intensity Scale, and measure windspeeds over a period of ten minutes, while the JTWC and the NWOC measured sustained winds over a period of one minute which are compared to the Saffir–Simpson hurricane wind scale. ==Seasonal summary== ImageSize = width:800 height:215 PlotArea = top:10 bottom:80 right:20 left:20 Legend = columns:3 left:30 top:58 columnwidth:270 AlignBars = early DateFormat = dd/mm/yyyy Period = from:01/11/1991 till:01/06/1992 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/11/1991 Colors = id:canvas value:gray(0.88) id:GP value:red id:td value:rgb(0.38,0.73,1) legend:Tropical_Disturbance/Tropical_Depression id:c1 value:rgb(0,0.98,0.96) legend:Category_1_=_63–87_km/h_(39–54_mph) id:c2 value:rgb(0.80,1,1) legend:Category_2_=_88–142_km/h_(55–74_mph) id:c3 value:rgb(1,1,0.80) legend:Category_3_=_143–158-km/h_(75–98_mph) id:c4 value:rgb(1,0.56,0.13) legend:Category_4_=_159–204_km/h_(99–127_mph) id:c5 value:rgb(1,0.38,0.38) legend:Category_5_=_≥205_km/h_(≥128_mph) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:Month PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:12/11/1991 till:21/11/1991 color:C3 text:"Tia" from:04/12/1991 till:17/12/1991 color:C4 text:"Val" from:04/12/1991 till:18/12/1991 color:C4 text:"Wasa-Arthur" from:04/01/1992 till:15/01/1992 color:C4 text:"Betsy" from:16/01/1992 till:18/01/1992 color:TD text:"13P" barset:break from:05/02/1992 till:09/02/1992 color:C2 text:"Cliff" from:04/02/1992 till:19/02/1992 color:C3 text:"Daman" from:24/02/1992 till:07/03/1992 color:C4 text:"Esau" from:04/03/1992 till:11/03/1992 color:C5 text:"Fran" from:13/03/1992 till:19/03/1992 color:C2 text:"Gene" barset:break from:23/03/1992 till:29/03/1992 color:C1 text:"Hettie" from:07/04/1992 till:08/04/1992 color:TD text:"Unnamed" from:27/04/1992 till:06/05/1992 color:C2 text:"Innis" bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/11/1991 till:01/12/1991 text:November from:01/12/1991 till:01/01/1992 text:December from:01/01/1992 till:01/02/1992 text:January from:01/02/1992 till:01/03/1992 text:February from:01/03/1992 till:01/04/1992 text:March from:01/04/1992 till:01/05/1992 text:April from:01/05/1992 till:01/06/1992 text:May TextData = pos:(569,23) text:"(For further details, please see" pos:(713,23) text:"scales)" During the season a significant increase in the amount of tropical cyclones occurring within the South Pacific basin was observed, with eleven tropical cyclones occuring within the basin during the season compared to three during the previous season. This increase was attributed to a mature El Niño episode, that had started developing towards the end of the previous season.〔 During the season the major areas of tropical cyclogenesis were shifted eastwards, from their mean position towards the more central parts of Pacific.〔 The first tropical cyclone of the season was first noted as a tropical depression on November 13, before it was named Tia during November 16, after it had become a category 1 tropical cyclone on the Australian tropical cyclone intensity scale. Over the next day the system rapidly intensified into a category 3 severe tropical cyclone and affected the Solomon Islands of Tikopia and Anuta while near its peak intensity.〔〔 Tia subsequently started to weaken during November 19, as it became the first of six tropical cyclones to affect Vanuatu during the season.〔 The names: Tia, Val, Wasa, Betsy, Esau and Fran were later retired from the tropical cyclone naming lists. On July 1, 1992 the New Zealand Meteorological Service (TCWC Wellington) was broken up and became the Meteorological Service of New Zealand and the National Institute of Water and Atmospheric Research. ==Storms== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1991–92 South Pacific cyclone season」の詳細全文を読む スポンサード リンク
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