Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations
文献类型：CNKI期刊论文
| 作者 | Hai ZHI; Rong-Hua ZHANG ; Pengfei LIN; Peng YU
|
| 发表日期 | 2019-03-05 |
| 出处 | Advances in Atmospheric Sciences
 |
| 关键词 | mixed-layer salinity salt budget interannual variability tropical Pacific model simulation |
| 英文摘要 | Salinity variability and its causes in the tropical Pacific are analyzed using observations, reanalysis products and model simulations. The mixed-layer salinity(MLS) budget analyses from observations and reanalysis products indicate that its interannual evolution is closely related to ENSO and is predominantly governed by surface forcing and surface advection in the western-central equatorial Pacific. It is found that the observed MLS tendency leads Nin?o3.4 by about 12 months due to the effect of negative freshwater flux(evaporation minus precipitation). These observation-based analyses are used to evaluate the corresponding simulation using GFDL-ESM2 M. It is evident that the model can simulate the spatiotemporal variations of MLS with some discrepancies compared to observations. In the warm pool of the equatorial Pacific the MLS tendency in the model is sensitive to ocean dynamics, however model biases cause the tendency to be underestimated. In particular, the freshwater flux is overestimated while the ocean surface zonal current and vertical velocity at the base of the mixed layer are underestimated. Due to model biases in representing the related physics, the effects of surface forcing on the simulated MLS budget are overestimated and those of subsurface and surface advection are relatively weak. Due to weaker surface advection and subsurface forcing than observed, the simulated compensations for surface forcing are suppressed, and the simulated MLS tendency that leads Nin?o3.4 by 8–10 months, which is shorter than the observed lead time. These results are useful for the interpretation of observational analyses and other model simulations in the tropical Pacific. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Natural Science Foundation of China (Grant Nos. 41690122, 41690120 and 41475101) ; the NSFC–Shandong Joint Fund for Marine Science Research Centers (Grant No. U1406401) ; the NSFC Innovative Group Grant (Project No. 41421005) ; Taishan Scholarship |
| 卷 | v.36期:04页:42-60 |
| 语种 | 英文; |
| 分类号 | P714.1;P731.12 |
| ISSN号 | 0256-1530 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188630]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.TheCooperativeInstituteforClimateandSatellites(CICS),UniversityofMaryland,CollegePark 2.StateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG),InstituteofAtmosphericPhysics(IAP),ChineseAcademyofSciences 3.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 4.LaboratoryforOceanandClimateDynamics,QingdaoNationalLaboratoryforMarineScienceandTechnology 5.UniversityofChineseAcademyofSciences 6.CollegeofAtmosphericSciences,NanjingUniversityofInformationScienceandTechnology |
| 推荐引用方式 GB/T 7714 | Hai ZHI,Rong-Hua ZHANG,Pengfei LIN,et al. Interannual Salinity Variability in the Tropical Pacific in CMIP5 Simulations. 2019. |
入库方式： OAI收割
来源：海洋研究所
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