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DOI | 10.1002/joc.5834 |
Interactions between intraseasonal and diurnal variability of precipitation in the South Central Pacific: The case of a small high island, Tahiti, French Polynesia | |
Hopuare, Marania; Guglielmino, Mathieu; Ortega, Pascal | |
2019-02-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:2页码:670-686 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Intraseasonal and diurnal variability of precipitation over Tahiti, French Polynesia, are investigated with the use of wind regimes as intermediary tools. Four wind regimes have been determined over a large domain around Tahiti in the wet season. It has been shown that some phases of the Madden-Julian Oscillation (MJO) trigger some regimes and undermine some others. The diurnal cycle of precipitation in Tahiti is composed of two rainfall maxima. A frequent maximum at midnight but with a low value. An afternoon maximum, less frequent but with a higher value. We have noticed that the afternoon rainfall maximum, which is a reasonable consequence of the sea breeze circulation, is smoothen on the windward side when vigorous wind regimes obstruct the development of the sea breeze. We have also found that daily mean precipitation is significantly increased during MJO Phases 7 and 8, and reduced during Phases 2 and 3. Phase 8 is the wettest phase on Tahiti, suggesting the convective envelope is overlooking the island. Lastly, we have provided evidence that the diurnal cycle of rainfall is significantly affected by the MJO. Indeed, both the midnight and afternoon maxima increase during MJO Phase 7. The most quiescent wind regimes are triggered during Phase 7, as a result from the propagation of the westerly wind anomaly, which allow the development of the sea breeze circulation and the increase of the afternoon peak. For MJO Phase 8, however, the above relationships break down, as the diurnal cycle is not enhanced by the predominant quiescent wind regimes. We assume that the MJO convective envelope covers the island and stays several days, preventing the solar heating of the surface, hence the development of the land/sea breeze circulation, and foremost leads to higher amounts of rainfall as the Phase 8 is the wettest phase on Tahiti. |
英文关键词 | climate clustering diurnal cycle MJO wind regimes |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459665000006 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; MARITIME CONTINENT ; TROPICAL PACIFIC ; WEATHER REGIMES ; RAINFALL ; CYCLE ; SEA ; MJO ; CONVECTION ; CIRCULATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/37100 |
专题 | 气候变化 |
作者单位 | GePaSud Lab, F-98702 Tahiti, French Polynesi, France |
推荐引用方式 GB/T 7714 | Hopuare, Marania,Guglielmino, Mathieu,Ortega, Pascal. Interactions between intraseasonal and diurnal variability of precipitation in the South Central Pacific: The case of a small high island, Tahiti, French Polynesia[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(2):670-686. |
APA | Hopuare, Marania,Guglielmino, Mathieu,&Ortega, Pascal.(2019).Interactions between intraseasonal and diurnal variability of precipitation in the South Central Pacific: The case of a small high island, Tahiti, French Polynesia.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(2),670-686. |
MLA | Hopuare, Marania,et al."Interactions between intraseasonal and diurnal variability of precipitation in the South Central Pacific: The case of a small high island, Tahiti, French Polynesia".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.2(2019):670-686. |
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