Asymmetry of upper ocean salinity response to the Indian Ocean dipole events as seen from ECCO simulation

ZHANG Ying; DU Yan; ZHANG Yuhong; GAO Shan

doi:10.1007/s13131-016-0904-z

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Article Navigation > Acta Oceanologica Sinica > 2016 > 35(7): 42-49

ZHANG Ying, DU Yan, ZHANG Yuhong, GAO Shan. Asymmetry of upper ocean salinity response to the Indian Ocean dipole events as seen from ECCO simulation[J]. Acta Oceanologica Sinica, 2016, 35(7): 42-49. doi: 10.1007/s13131-016-0904-z

Citation:

ZHANG Ying, DU Yan, ZHANG Yuhong, GAO Shan. Asymmetry of upper ocean salinity response to the Indian Ocean dipole events as seen from ECCO simulation[J]. Acta Oceanologica Sinica, 2016, 35(7): 42-49. doi: 10.1007/s13131-016-0904-z

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Asymmetry of upper ocean salinity response to the Indian Ocean dipole events as seen from ECCO simulation

doi: 10.1007/s13131-016-0904-z

1.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.
Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

Received Date: 2015-06-23
Rev Recd Date: 2015-10-12

Abstract

Abstract

The interannual variability of salinity and associated ocean dynamics in the equatorial Indian Ocean is analyzed using observations and numerical simulations by the Estimating the Circulation and Climate of the Ocean (ECCO) model. The results show that salinity anomalies in the upper ocean are asymmetrically associated with the Indian Ocean dipole (IOD) events, with stronger response during their positive phases. Further investigations reveal that zonal currents along the equator, the Wyrtki jets, dominate the salinity transport. During the positive IOD events, the Wyrtki jets have stronger westward anomalies. The positive skewness of the IOD explains that the amplitude of the anomalous Wyrtki jets is stronger in the positive IOD events than that in the negative events.
- Wyrtki jets,
- salinity transport,
- Indian Ocean dipole,
- asymmetry

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