On the phase propagation and relationship of interannual variability in the tropical Pacific climate system

IOCAS-IR > 海洋环流与波动重点实验室

	On the phase propagation and relationship of interannual variability in the tropical Pacific climate system
	Zhang Ronghua; Rothstein LM
	1998-09
发表期刊	CLIMATE DYNAMICS
卷号	14 期号:10 页码:713-723
摘要	Upper ocean thermal data and surface marine observations are used to describe the three-dimensional, basinwide co-evolution of interannual variability in the tropical Pacific climate system. The phase propagation behavior differs greatly from atmosphere to ocean, and from equatorial to off-equatorial and from sea surface to subsurface depths in the ocean. Variations in surface zonal winds and sea surface temperatures (SSTs) exhibit a standing pattern without obvious zonal phase propagation. A nonequilibrium ocean response at subsurface depths is evident, characterized by coherent zonal and meridional propagating anomalies around the tropical North Pacific: eastward on the equator but westward off the equator. Depending on geographic location, there are clear phase relations among various anomaly fields. Surface zonal winds and SSTs in the equatorial region fluctuate approximately in-phase in time, but have phase differences in space. Along the equator, zonal mean thermocline depth (or heat content) anomalies are in nonequilibrium with the zonal wind stress forcing. Variations in SSTs are not in equilibrium either with subsurface thermocline changes in the central and western equatorial Pacific, with the former lagging the latter and displaced to the east. Due to its phase relations to SST and winds, the basinwide temperature anomaly evolution at thermocline depths on an interannual time scale may determine the slow physics of ENSO, and play a central role in initiating and terminating coupled air-sea interaction. This observed basinwide phase propagation of subsurface anomaly patterns can be understood partially as water discharge processes from the western Pacific to the east and further to high latitudes, and partially by the modified delayed oscillator physics.
关键词	Nino Southern Oscillation Ocean-atmosphere Interaction El-nino Conceptual-model Rossby Waves Coupled Gcm Enso Temperature Simulation Resolution
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/18138
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Zhang Ronghua,Rothstein LM. On the phase propagation and relationship of interannual variability in the tropical Pacific climate system[J]. CLIMATE DYNAMICS,1998,14(10):713-723.
APA	Zhang Ronghua,&Rothstein LM.(1998).On the phase propagation and relationship of interannual variability in the tropical Pacific climate system.CLIMATE DYNAMICS,14(10),713-723.
MLA	Zhang Ronghua,et al."On the phase propagation and relationship of interannual variability in the tropical Pacific climate system".CLIMATE DYNAMICS 14.10(1998):713-723.

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