Stream-coordinate structure of oceanic jets based on merged altimeter data

Che Sun; Linlin Zhang; Xiaomei Yan

doi:10.1007/s00343-011-9938-4

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Stream-coordinate structure of oceanic jets based on merged altimeter data

Updated：2023-05-16

- Stream-coordinate structure of oceanic jets based on merged altimeter data
- Journal of Oceanology and Limnology Vol. 29, Issue 1, Pages: 1-9(2011)
- Affiliations：
  
  1. Key Laboratory of Ocean Circulation and Wave Institute of Oceanology Chinese Academy of Sciences
  2. Graduate University of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-011-9938-4
  CLC：
- Online First：15 January 2011，
  
  Published：2011
- Accepted：
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Sun, C., Zhang, L. & Yan, X. Stream-coordinate structure of oceanic jets based on merged altimeter data., Chin. J. Ocean. Limnol. 29, 1–9 (2011). https://doi.org/10.1007/s00343-011-9938-4
DOI：

Sun, C., Zhang, L. & Yan, X. Stream-coordinate structure of oceanic jets based on merged altimeter data., Chin. J. Ocean. Limnol. 29, 1–9 (2011). https://doi.org/10.1007/s00343-011-9938-4 DOI：

摘要

Abstract

The jet structure of the Southern Ocean front south of Australia is studied in stream-coordinate with a new altimeter product—Absolute Dynamic Topography (ADT) from AVISO. The accuracy of the ADT data is validated with the mooring data from a two-year subantarctic-front experiment. It is demonstrated that the ADT is consistent with in-situ measurements and captures the meso-scale activity of the Antarctic Circumpolar Current (ACC). Stream-coordinate analysis of ADT surface geostrophic flows finds that ACC jets exhibit large spatio-temporal variability and do not correspond to particular streamfunction values. In the circumpolar scope ACC jets display a transient fragmented pattern controlled by topographic features. The poleward shift of jet in streamfunction space

as revealed by a streamwise correlation method

indicates the presence of meridional fluxes of zonal momentum. Such cross-stream eddy fluxes concentrate the broad ACC baroclinic flow into narrow jets. Combined with a recent discovery of gravest empirical mode (GEM) in the thermohaline fields

the study clarifies the interrelationship among front

jet and streamfunction in the Southern Ocean.

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references

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