Intraseasonal variability of the tropical Pacific subsurface temperature in the two flavours of El Nino

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Intraseasonal variability of the tropical Pacific subsurface temperature in the two flavours of El Nino
	Feng, Junqiao 1,2; Wang, Qingye 1,2; Hu, Shijian 1,2; Hu, Dunxin 1,2
刊名	INTERNATIONAL JOURNAL OF CLIMATOLOGY
	2016-02-01
卷号	36 期号:2 页码:867-884
关键词	equatorial Pacific Ocean subsurface ocean temperature intraseasonal variability eastern Pacific El Nino central Pacific El Nino
英文摘要	The spatial structure and temporal evolution of the intraseasonal variability (ISV) of the subsurface ocean temperature (STA) in the equatorial Pacific associated with the two flavours of El Nino [i.e. the canonical or eastern Pacific (EP) El Nino and the central Pacific (CP) El Nino] are investigated using observations and 1.5-layer linear reduced gravity model. Results suggest that the ISV characteristics show some differences in the two types of El Nino, although both oscillate along the thermocline in the form of the intraseasonal equatorial Kelvin wave (IEKW), which is excited in the western tropical Pacific by the zonal wind stress associated with the Madden-Julian oscillation (MJO). First, the period of dominant mode of the STA ISV during CP El Nino broadly distributes in 50-80 days with the spectra peaking in 60-65 days. By contrast, the spectrum of STA ISV during EP El Nino shows a peak in 75-80-day period. This indicates that the wave speed is faster in the CP El Nino than in EP El Nino. Second, the ISV activity peaks in previous spring during the developing phase of EP El Nino, whereas during CP El Nino it becomes the most active during the mature phase. Third, the strongest IEKW occurs in the CP around the dateline during CP El Nino and attenuates quickly east of 130 degrees W due to strong eddy viscosity dissipation, while the IEKW during the EP El Nino propagates efficiently from the western to the eastern Pacific with a relative weak diffusion.
收录类别	SCI
语种	英语
WOS记录号	WOS:000369991700024
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/112458]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Feng, Junqiao,Wang, Qingye,Hu, Shijian,et al. Intraseasonal variability of the tropical Pacific subsurface temperature in the two flavours of El Nino[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2016,36(2):867-884.
APA	Feng, Junqiao,Wang, Qingye,Hu, Shijian,&Hu, Dunxin.(2016).Intraseasonal variability of the tropical Pacific subsurface temperature in the two flavours of El Nino.INTERNATIONAL JOURNAL OF CLIMATOLOGY,36(2),867-884.
MLA	Feng, Junqiao,et al."Intraseasonal variability of the tropical Pacific subsurface temperature in the two flavours of El Nino".INTERNATIONAL JOURNAL OF CLIMATOLOGY 36.2(2016):867-884.