Statistical analysis of surface hydrography and circulation variations in northern South China Sea

Wu Lingjuan; Cui Maochang

doi:10.1007/BF02842681

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Statistical analysis of surface hydrography and circulation variations in northern South China Sea

Updated：2023-05-16

- Statistical analysis of surface hydrography and circulation variations in northern South China Sea
- Journal of Oceanology and Limnology Vol. 23, Issue 4, Pages: 383-392(2005)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. The Graduate School of the Chinese Academy of Sciences
  3. Key Laboratory of Marine Science and Numerical Modeling of SOA
- Author bio：
- Funds：
- DOI：10.1007/BF02842681
  CLC：
- Published：2005
- Accepted：
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Lingjuan, W., Maochang, C. Statistical analysis of surface hydrography and circulation variations in northern South China Sea., Chin. J. Ocean. Limnol. 23, 383–392 (2005). https://doi.org/10.1007/BF02842681
DOI：

Lingjuan, W., Maochang, C. Statistical analysis of surface hydrography and circulation variations in northern South China Sea., Chin. J. Ocean. Limnol. 23, 383–392 (2005). https://doi.org/10.1007/BF02842681 DOI：

摘要

Abstract

To study the variations in surface hydrography and circulation in northern South China Sea (NSCS)

rotated empirical orthogonal function (REOF) and extended associate pattern analysis (EAPA) are used with daily sea surface salinity (SSS)

sea surface temperature (SST) and sea surface height (SSH) datasets covering 1 126 days from American Navy Experimental Real-Time East Asian Seas Ocean Nowcast System in this paper. Results show that in summer

the SCS Diluted Water Expansion (SDWE) is the most dominant factor controlling SSS variations in the NSCS. The remarkable SDWE usually begins in early July

reaches its maximum in middle August and weakens in late September. In summer fluorishing period

its low saline core is just limited between 21°N and 22°N because of strong surface anomalous anticyclonic circulation in the NSCS. In early or late stage

the anomalous anticyclonic circulation becomes weak or turns into cyclonic one

thus the weak SCS diluted water can disperse. And its influence on the SSS variations has obviously decreased. The Kuroshio intrusion is the second controlling factor

and it has the almost opposite seasonal or intraseasonal oscillations and spatial characteristics to the SDWE. Winter Kuroshio Intrusion (WKI) begins in early November and lasts about three months. Intraseasonal Kuroshio Intrusion (IKI) takes place at any seasons. The westward Ekman transport produced by the north anomaly of East Asia Monsoon (EAM) pushes warmer and more saline seawater into the NSCS through the Bashi Strait and seems to decide the intensity of seasonal and intraseasonal Kuroshio intrusions.

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Keywords

references

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