A fresh look at the deepwater overflow in the Luzon Strait

ZHU Yaohua; SUN Junchuan; WEI Zexun; WANG Yonggang; FANG Guohong; QU Tangdong

doi:10.1007/s13131-017-1057-4

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Article Navigation > Acta Oceanologica Sinica > 2017 > 36(5): 1-8

ZHU Yaohua, SUN Junchuan, WEI Zexun, WANG Yonggang, FANG Guohong, QU Tangdong. A fresh look at the deepwater overflow in the Luzon Strait[J]. Acta Oceanologica Sinica, 2017, 36(5): 1-8. doi: 10.1007/s13131-017-1057-4

Citation:

ZHU Yaohua, SUN Junchuan, WEI Zexun, WANG Yonggang, FANG Guohong, QU Tangdong. A fresh look at the deepwater overflow in the Luzon Strait[J]. Acta Oceanologica Sinica, 2017, 36(5): 1-8. doi: 10.1007/s13131-017-1057-4

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A fresh look at the deepwater overflow in the Luzon Strait

doi: 10.1007/s13131-017-1057-4

1.
Key Laboratory of Marine Science and Numerical Modeling, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
2.
Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles 90095, USA

Received Date: 2016-12-06

Abstract

Abstract

On the basis of the latest version of a U.S. Navy generalized digital environment model (GDEM-V3.0) and World Ocean Atlas (WOA13), the hydraulic theory is revisited and applied to the Luzon Strait, providing a fresh look at the deepwater overflow there. The result reveals that:(1) the persistent density difference between two sides of the Luzon Strait sustains an all year round deepwater overflow from the western Pacific to the South China Sea (SCS); (2) the seasonal variability of the deepwater overflow is influenced not only by changes in the density difference between two sides of the Luzon Strait, but also by changes in its upstream layer thickness; (3) the deepwater overflow in the Luzon Strait shows a weak semiannual variability; (4) the seasonal mean circulation pattern in the SCS deep basin does not synchronously respond to the seasonality of the deepwater overflow in the Luzon Strait. Moreover, the deepwater overflow reaches its seasonal maximum in December (based on GDEM-V3.0) or in fall (October-December, based on the WOA13), accompanied by the lowest temperature of the year on the Pacific side of the Luzon Strait. The seasonal variability of the deepwater overflow is consistent with the existing longest (3.5 a) continuous observation along the major deepwater passage of the Luzon Strait.
- Luzon Strait,
- deepwater overflow,
- seasonal variability,
- South China Sea

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References

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