| 翻訳と辞書 |
| 2011–12 South Pacific cyclone season ： ウィキペディア英語版 |
2011–12 South Pacific cyclone season
The 2011–12 South Pacific cyclone season was one of the least active South Pacific tropical cyclone seasons on record, with only three tropical cyclones occurring during the season. The season ran from November 1, 2011 to April 30, 2012, however, any tropical cyclones that form before June 30, 2012 would have fallen within the 2011-12 tropical cyclone year and would have counted towards the season total. The strongest and only severe tropical cyclone that occurred during the season was Severe Tropical Cyclone Jasmine, which tracked in from out of the South Pacific basin. Within the basin, tropical cyclones are monitored by the Regional Specialized Meteorological Center (RSMC) in Nadi, Fiji, and the Tropical Cyclone Warning Center (TCWC) in Wellington, New Zealand. RSMC Nadi attaches an F designation to tropical disturbances that form in or move into the South Pacific. The United States Joint Typhoon Warning Center (JTWC) issues unofficial warnings within the South Pacific, designating tropical storm-equivalent or greater tropical cyclones with a number and a P suffix. RSMC Nadi and TCWC Wellington both use the Australian Tropical Cyclone Intensity Scale, and measure windspeeds over a period of ten minutes, while the JTWC measures sustained winds over a period of one minute and uses the Saffir–Simpson Hurricane Scale.
==Seasonal forecasts==
Ahead of the cyclone season, RSMC Nadi, TCWC Wellington, the Australian Bureau of Meteorology (BoM), the New Zealand National Institute of Water and Atmospheric Research (NIWA) and various other Pacific Meteorological services, all contributed towards the Island Climate Update tropical cyclone outlook that was released in October 2011.〔 The outlook took into account analogue seasons and the La Nina conditions that were developing across the Pacific.〔 The outlook called for a below average number of tropical cyclones for the 2011–12 season, with five to eight named tropical cyclones, to occur between 135°E and 120°W compared to an average of around nine.〔 At least one these cyclones was expected to become either a category 3 or a category 4 severe tropical cyclone, while there was a reduced chance of a Category 5 severe tropical cyclone.〔 In addition to contributing towards the Island Climate Update outlook, RSMC Nadi and the BoM issued their own seasonal forecasts for the South Pacific region.〔〔
The BoM issued 2 seasonal forecasts for the South Pacific region between 142.5°E and 120°W, one for the Western Southern Pacific region between 142.5°E and 165°E and one for the Eastern Southern Pacific region between 165°E and 120°W.〔 They noted that the tropical Pacific Ocean was currently experiencing neutral to borderline La Niña conditions which meant that a westward shift in tropical cyclone activity in the basin was favored.〔 As a result they predicted that the Western South Pacific region was predicted to have 65% chance of being above average, while the Eastern region had a 40% chance of being above average.〔 Within their outlook RSMC Nadi predicted that between five and eight tropical cyclones, would occur within the basin compared to an average of around 9 cyclones.〔 A single tropical cyclone was expected to become or exceede category 3 severe tropical cyclone status.〔 They also reported that the tropical cyclone genesis trough was expected to be located within the Coral Sea.〔 This was based on the expected and predicted ENSO conditions, and the existence of the Pacific warm pool of sub-surface temperature anomalies in this region.〔
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「2011–12 South Pacific cyclone season」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|