Asymmetry of Salinity Variability in the Tropical Pacific during Interdecadal Pacific Oscillation Phases
文献类型：CNKI期刊论文
| 作者 | Hai ZHI; Zihui YANG; Rong-Hua ZHANG ; Pengfei LIN; Jifeng QI; Yu HUANG; Meng DONG
|
| 发表日期 | 2023-04-20 |
| 出处 | Advances in Atmospheric Sciences
 |
| 关键词 | salinity variability asymmetry upper-ocean stratification Interdecadal Pacfic Oscillation tropical Pacific |
| 英文摘要 | It has been recognized that salinity variability in the tropical Pacific is closely related to the Interdecadal Pacific Oscillation(IPO). Here, we use model simulations from 1900 to 2017 to illustrate obvious asymmetries of salinity variability in the tropical Pacific during positive and negative IPO phases. The amplitude of salinity variability in the tropical Pacific during positive IPO phases is larger than that during negative IPO phases, with a more westward shift of a large Sea Surface Salinity(SSS) anomaly along the equator. Salinity budget analyses show that the asymmetry of salinity variability during positive and negative IPO phases is dominated by the difference in the surface forcing associated with the freshwater flux [FWF, precipitation(P) minus evaporation(E)], with a contribution of 40%–50% near the dateline on the equator. Moreover, the relationships between the salinity variability and its budget terms also show differences in their leadlag correlations during positive and negative IPO phases. These differences in salinity variability during different IPO phases produce asymmetric effects on seawater density which can reduce or enhance upper-ocean stratification. Therefore,the salinity effects may modulate the intensity of El Ni?o-Southern Oscillation(ENSO), resulting in an enhanced(reduced)El Ni?o but a reduced(enhanced) La Ni?a during positive(negative) IPO phases by 1.6℃ psu~(-1)(1.3℃ psu~(-1)), respectively.It is suggested that the asymmetry of salinity variability may be related to the recent change in ENSO amplitude associated with the IPO, which can help elucidate ENSO diversity. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Natural Science Foundation of China (NSFC ; Grant No. 42030410) ; the Laoshan Laboratory (Grant No. LSKJ202202403) ; the National Key Research and Development Program on Monitoring, Early Warning and Prevention of Major Natural Disaster (Grant Nos. 2019YFC1510004, 2020YFA0608902) ; supported by the NSFC (Grant No. 41976026) ; supported by the Startup Foundation for Introducing Talent of NUIST |
| 卷 | v.40期:07页:113-128 |
| 语种 | 英文; |
| 分类号 | P731.12 |
| ISSN号 | 0256-1530 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187138]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.LaoshanLaboratory 2.CollegeofAtmosphericSciences,NanjingUniversityofInformationScienceandTechnology 3.SchoolofMarineSciences,NanjingUniversityofInformationScienceandTechnology 4.StateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG),InstituteofAtmosphericPhysics(IAP),ChineseAcademyofSciences 5.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,andCenterforOceanMega-Science,ChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Hai ZHI,Zihui YANG,Rong-Hua ZHANG,et al. Asymmetry of Salinity Variability in the Tropical Pacific during Interdecadal Pacific Oscillation Phases. 2023. |
入库方式： OAI收割
来源：海洋研究所
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