Interdecadal change in properties of El Nino-Southern Oscillation in an intermediate coupled model

IOCAS-IR > 海洋环流与波动重点实验室

	Interdecadal change in properties of El Nino-Southern Oscillation in an intermediate coupled model
	Zhang Ronghua; Busalacchi AJ
	2005-05-01
发表期刊	JOURNAL OF CLIMATE
卷号	18 期号:9 页码:1369-1380
摘要	The role of subsurface temperature variability in modulating El Ni (n) over tildeo-Southern Oscillation (ENSO) properties is examined using an intermediate coupled model (ICM), consisting of an intermediate dynamic ocean model and a sea surface temperature (SST) anomaly model. An empirical procedure is used to parameterize the temperature of subsurface water entrained into the mixed layer (T-e) from sea level (SL) anomalies via a singular value decomposition (SVD) analysis for use in simulating sea surface temperature anomalies (SSTAs). The ocean model is coupled to a statistical atmospheric model that estimates wind stress anomalies also from an SVD analysis. Using the empirical T-e models constructed from two subperiods, 1963-79 (T-e(63-69)) and 1980-96 (T-e(80-96)), the coupled system exhibits strikingly different properties of interannual variability (the oscillation period, spatial structure, and temporal evolution). For the T-e(63-79) model, the system features a 2-yr oscillation and westward propagation of SSTAs on the equator, while for the T-e(80-96) model, it is characterized by a 5-yr oscillation and eastward propagation. These changes in ENSO properties are consistent with the behavior shift of El Ni (n) over tildeo observed in the late 1970s. Heat budget analyses further demonstrate a controlling role played by the vertical advection of subsurface temperature anomalies in determining the ENSO properties.
关键词	Sea-surface Temperature Decadal Variability Pacific-ocean Enso Prediction Predictability Thermocline Mechanism Climate Tropics
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/337002/18173
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,Busalacchi AJ. Interdecadal change in properties of El Nino-Southern Oscillation in an intermediate coupled model[J]. JOURNAL OF CLIMATE,2005,18(9):1369-1380.
APA	Zhang Ronghua,&Busalacchi AJ.(2005).Interdecadal change in properties of El Nino-Southern Oscillation in an intermediate coupled model.JOURNAL OF CLIMATE,18(9),1369-1380.
MLA	Zhang Ronghua,et al."Interdecadal change in properties of El Nino-Southern Oscillation in an intermediate coupled model".JOURNAL OF CLIMATE 18.9(2005):1369-1380.

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