Effects of interannual salinity variability and freshwater flux forcing on the development of the 2007/08 La Nina event diagnosed from Argo and satellite data

IOCAS-IR > 海洋环流与波动重点实验室

	Effects of interannual salinity variability and freshwater flux forcing on the development of the 2007/08 La Nina event diagnosed from Argo and satellite data
	Zheng Fei; Zhang Ronghua
	2012-09
发表期刊	Dynamics of Atmospheres and Oceans
期号	57 页码:45-57
摘要	Oceanic salinity and its related freshwater flux (FWF) forcing in the tropical Pacific have been of increased interest recently due to their roles in the El Nino-Southern Oscillation (ENSO), the global climate and water cycle. A comprehensive data analysis is performed to illustrate the significant effects of interannual salinity variability and FWF forcing during the 2007/08 La Nina event using three-dimensional temperature and salinity fields from Argo profiles, and some related fields derived from the Argo and satellite-based data, including the mixed layer depth (MLD), heat flux, freshwater flux, and buoyancy flux (Q(B)). It is demonstrated that during the developing phase of 2007/08 La Nina, a negative FWF anomaly and its associated positive sea surface salinity (SSS) anomaly in the western-central basin act to increase oceanic density and destabilize the upper ocean. At the same time, the negative FWF anomaly tends to reduce a positive Q(B) anomaly and deepen the mixed layer (ML). These related oceanic processes act to strengthen the vertical mixing and entrainment of subsurface water at the base of ML, which further enhance cold sea surface temperature (SST) anomalies associated with the La Nina event, a demonstration of a positive feedback induced by FWF forcing.
关键词	Tropical Pacific-ocean Sea-surface Salinity Temperature T-e El-nino Equatorial Pacific Climate Model Precipitation Oscillation Anomalies Salinity Effect Fwf La Nina Argo
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/337002/18186
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Zheng Fei,Zhang Ronghua. Effects of interannual salinity variability and freshwater flux forcing on the development of the 2007/08 La Nina event diagnosed from Argo and satellite data[J]. Dynamics of Atmospheres and Oceans,2012(57):45-57.
APA	Zheng Fei,&Zhang Ronghua.(2012).Effects of interannual salinity variability and freshwater flux forcing on the development of the 2007/08 La Nina event diagnosed from Argo and satellite data.Dynamics of Atmospheres and Oceans(57),45-57.
MLA	Zheng Fei,et al."Effects of interannual salinity variability and freshwater flux forcing on the development of the 2007/08 La Nina event diagnosed from Argo and satellite data".Dynamics of Atmospheres and Oceans .57(2012):45-57.

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