Low-Frequency Coupled Atmosphere-Ocean Variability in the Southern Indian Ocean
文献类型：CNKI期刊论文
| 作者 | Feng JQ(冯俊乔); Hu DX(胡敦欣); Yu LJ(于乐江) |
| 发表日期 | 2012-05-10 |
| 出处 | Advances in Atmospheric Sciences
 |
| 关键词 | southern Indian Ocean,SST,SLP,Antarctic Oscillation |
| 英文摘要 | The low-frequency atmosphere-ocean coupled variability of the southern Indian Ocean(SIO) was investigated using observation data over 1958-2010.These data were obtained from ECMWF for sea level pressure(SLP) and wind,from NCEP/NCAR for heat fluxes,and from the Hadley Center for SST.To obtain the coupled air-sea variability,we performed SVD analyses on SST and SLP.The primary coupled mode represents 43% of the total square covariance and is featured by weak westerly winds along 45-30 S.This weakened subtropical anticyclone forces fluctuations in a well-known subtropical dipole structure in the SST via wind-induced processes.The SST changes in response to atmosphere forcing and is predictable with a lead-time of 1-2 months.Atmosphere-ocean coupling of this mode is strongest during the austral summer.Its principle component is characterized by mixed interannual and interdecadal fluctuations.There is a strong relationship between the first mode and Antarctic Oscillation(AAO).The AAO can influence the coupled processes in the SIO by modulating the subtropical high.The second mode,accounting for 30% of the total square covariance,represents a 25-year period interdecadal oscillation in the strength of the subtropical anticyclone that is accompanied by fluctuations of a monopole structure in the SST along the 35-25 S band.It is caused by subsidence of the atmosphere.The present study also shows that physical processes of both local thermodynamic and ocean circulation in the SIO have a crucial role in the formation of the atmosphere-ocean covariability. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the Major Project of the National Natural Science Foundation of China (Grant No.40890151) ; the National Natural Science Foundation of China (Grant No.41106016) |
| 卷 | v.29期:03页:112-128 |
| 语种 | 英文; |
| 分类号 | P732 |
| ISSN号 | 0256-1530 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/191285]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaves,ChineseAcademyofSciences 3.AppliedHydrometeorologicalResearchInstitute,NanjingUniversityofInformationScienceandTechnology |
| 推荐引用方式 GB/T 7714 | Feng JQ,Hu DX,Yu LJ. Low-Frequency Coupled Atmosphere-Ocean Variability in the Southern Indian Ocean. 2012. |
入库方式： OAI收割
来源：海洋研究所
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