中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effects of Interannual Salinity Variability on the Barrier Layer in the Western-Central Equatorial Pacific:A Diagnostic Analysis from Argo

文献类型:CNKI期刊论文

作者ZHENG Fei; ZHANG Rong-Hua; ZHU Jiang
发表日期2014-05-10
出处Advances in Atmospheric Sciences
关键词barrier layer,salinity effect,ENSO,Argo
英文摘要In this paper, interannual variations in the barrier layer thickness(BLT) are analyzed using Argo three-dimensional temperature and salinity data, with a focus on the effects of interannually varying salinity on the evolution of the El Nino–Southern Oscillation(ENSO). The interannually varying BLT exhibits a zonal seesaw pattern across the equatorial Pacific during ENSO cycles. This phenomenon has been attributed to two different physical processes. During El Nino(La Nina),the barrier layer(BL) is anomalously thin(thick) west of about 160°E, and thick(thin) to the east. In the western equatorial Pacific(the western part: 130°–160°E), interannual variations of the BLT indicate a lead of one year relative to those of the ENSO onset. The interannual variations of the BLT can be largely attributed to the interannual temperature variability, through its dominant effect on the isothermal layer depth(ILD). However, in the central equatorial Pacific(the eastern part: 160°E–170°W), interannual variations of the BL almost synchronously vary with ENSO, with a lead of about two months relative to those of the local SST. In this region, the interannual variations of the BL are significantly affected by the interannually varying salinity, mainly through its modulation effect on the mixed layer depth(MLD). As evaluated by a one-dimensional boundary layer ocean model, the BL around the dateline induced by interannual salinity anomalies can significantly affect the temperature fields in the upper ocean, indicating a positive feedback that acts to enhance ENSO.
文献子类CNKI期刊论文
资助机构supported by the National Basic Research Program of China (Grant No.2012CB955202) ; the National Natural Science Foundation of China (Grant No.41176014)
v.31期:03页:30-40
语种英文;
分类号P731.12
ISSN号0256-1530
源URL[http://ir.qdio.ac.cn/handle/337002/190478]  
专题中国科学院海洋研究所
作者单位1.InternationalCenterforClimateandEnvironmentScienceInstituteofAtmosphericPhysics,ChineseAcademyofSciences
2.EarthSystemScienceInterdisciplinaryCenter,UniversityofMaryland,CollegePark,Maryland20740,USA
3.KeyLaboratoryofOceanCirculationandWavesInstituteofOceanology,ChineseAcademyofSciences
推荐引用方式
GB/T 7714
ZHENG Fei,ZHANG Rong-Hua,ZHU Jiang. Effects of Interannual Salinity Variability on the Barrier Layer in the Western-Central Equatorial Pacific:A Diagnostic Analysis from Argo. 2014.

入库方式: OAI收割

来源:海洋研究所

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