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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク South Pacific convergence zone ： ウィキペディア英語版 South Pacific convergence zone The South Pacific Convergence Zone (SPCZ), a reverse-oriented monsoon trough, is a band of low-level convergence, cloudiness and precipitation extending from the Western Pacific Warm Pool at the maritime continent south-eastwards towards French Polynesia and as far as the Cook Islands (160W, 20S). The SPCZ is a portion of the Intertropical Convergence Zone (ITCZ) which lies in a band extending east-west near the Equator but can be more extratropical in nature, especially east of the Dateline. It is considered the largest and most important piece of the ITCZ, and has the least dependence upon heating from a nearby landmass during the summer than any other portion of the monsoon trough.〔E. Linacre and B. Geerts. (Movement of the South Pacific Convergence Zone. ) Retrieved on 2006-11-26.〕 The SPCZ can affect the precipitation on Polynesian islands in the southwest Pacific Ocean, so it is important to understand how the SPCZ behaves with large-scale, global climate phenomenon, such as the ITCZ, El Niño-Southern Oscillation, and the Interdecadal Pacific Oscillation (IPO), a portion of the Pacific Decadal Oscillation. ==Position== The SPCZ occurs where the southeast trades from transitory anticyclones to the south meet with the semipermanent easterly flow from the eastern South Pacific anticyclone. The SPCZ exists in summer and winter but can change its orientation and location. It is often distinct from the ITCZ over Australia, but at times they become one continuous zone of convergence. The location of the SPCZ is affected by ENSO and Interdecadal Pacific Oscillation conditions. It generally stretches from the Solomon Islands through Fiji, Samoa, and Tonga. Low level convergence along this band forms cloudiness as well as showers and thunderstorms.〔Glossary of Meteorology. (South Pacific convergence zone. ) Retrieved on 2006-11-26.〕 Thunderstorm activity, or convection, within the band is dependent upon the season, as the more equatorward portion is most active in the Southern Hemisphere summer, and the more poleward portion is most active during transition seasons of fall and spring.〔Stephen B. Cocks. (An Observational Study of the South Pacific Convergence Zone Using Satellite and Model Re-Analysis Data. ) Retrieved on 2006-11-26.〕 The convergence zone shifts east or west depending on the existence of El Niño, or the phase of ENSO. 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「South Pacific convergence zone」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.