著者
Masamichi OHBA Hiroaki UEDA
出版者
Meteorological Society of Japan
雑誌
気象集誌. 第2輯 (ISSN:00261165)
巻号頁・発行日
vol.85, no.3, pp.335-348, 2007 (Released:2007-08-09)
参考文献数
46
被引用文献数
59 62

One possible impact of sea surface temperature (SST) anomalies in the Indian Ocean (IO) on the ongoing El Niño is investigated using an air-sea coupled general circulation model (CGCM). A suite of CGCM experiments by imposing the IO basin-wide warming (BW) and IO dipole/zonal mode (IODZM) are conducted to assess the feedback effects of the El Niño-related SST anomalies on the Pacific. While the IODZM during boreal fall does not have a significant impact on the Pacific sector, the BW during boreal winter enhances the surface easterlies over the equatorial Western Pacific (WP) during the maturedecay phase of El Niño. The strengthened easterlies act to enhance the SST cooling over the WP, thereby the zonal gradient of SST between the IO and WP is greater than the climatology. These enhanced WP easterlies induce an advanced transition to the La Niña phase, which is caused by the upwelling ocean Kelvin waves. These results imply that the BW in the IO, to some extent, can be hastening the El Niño to La Niña transition.

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@PaulRoundy1 @Recretos I pulled a few of these references out of my MS thesis, I think some of the dynamics are relevant even tho most focus on the transition from El Nino >> La Nina rather than La Nina (yr 1) >> La Nina (yr 2) https://t.co/sm0VG4jOeI https://t.co/VGdwKXgMhD https://t.co/9M0OuucXCR
There's a plenty of literature that delves into this relationship, where Indian Ocean +SSTAs entice the development of La Nina &/or hasten the transition from El Nino >> La Nina https://t.co/ZfTnTJCKa4 https://t.co/OPIV8B4IYV https://t.co/oNr0ccg8Tl https://t.co/QxnvsVXqb7

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