Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific–Japan Pattern
Monsoon Gyres of the Northwest Pacific: Influences of ENSO, the MJO, and the Pacific–Japan Pattern
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DOI：
10.1175/jcli-d-16-0393.1
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发表时间：
2017-02
影响因子：
4.9
通讯作者：
J. Molinari;David Vollaro
中科院分区：
文献类型：
--
作者：
J. Molinari;David Vollaro
AbstractAn objective definition of monsoon gyres in the northwest Pacific was developed in order to construct a gyre climatology. Over a 31-yr period, 53 gyres were identified with a median formation location at 16.5°N, 135°E. More than 80% formed during July–September. More than half of gyres developed during El Nino periods at a median location 1200 km farther to the east-southeast than during La Nina. Cyclonic winds at 850 hPa extended across a diameter of more than 4000 km, with maximum tangential wind near the 1000-km radius. A precipitation maximum extended westward for several thousand kilometers south of the gyre. Typhoons were most common north and east of the gyre centers. More than 70% of gyres developed during large-amplitude MJO events, with a strong preference for Real-time Multivariate MJO (RMM) phases 5–7. In boreal summer these phases contain circulation and convective anomalies that coincide most closely with those of the climatological monsoon trough. Gyres are most likely to form when ...
