Numerical study of seasonal and interannual variation of circulation and water transports in the Luzon Strait

Wang Zhaoyi; Liu Guimei; Wang Hui; Wang Dakui

doi:10.3969/j.issn.0253-4193.2016.05.001

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Wang Zhaoyi, Liu Guimei, Wang Hui, Wang Dakui. Numerical study of seasonal and interannual variation of circulation and water transports in the Luzon Strait[J]. Haiyang Xuebao, 2016, 38(5): 1-13. doi: 10.3969/j.issn.0253-4193.2016.05.001

Citation:

Wang Zhaoyi, Liu Guimei, Wang Hui, Wang Dakui. Numerical study of seasonal and interannual variation of circulation and water transports in the Luzon Strait[J]. Haiyang Xuebao, 2016, 38(5): 1-13. doi: 10.3969/j.issn.0253-4193.2016.05.001

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Numerical study of seasonal and interannual variation of circulation and water transports in the Luzon Strait

doi: 10.3969/j.issn.0253-4193.2016.05.001

National Marine Environmental Forecasting Center, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, State Oceanic Administration, Beijing 100081, China

Received Date: 2015-04-27

Abstract

Abstract

The Northwest Pacific model, a regional (1/20)°eddy-resolving ocean general circulation model, is adapted to study the seasonal and inter-annual variation of circulation and water exchange in the Luzon Strait (LS) based on the ROMS (Regional Oceanic Model System). The LS is the main channel, through which the SCS exchange water with the West Pacific Ocean. The seasonal variation in the Luzon Strait Transport (LST) is found to be significant; and LST is westward throughout the year. The LST through the 120.75°E Section reaches the minimum in June of 0.40×10⁶ m³/s and maximum in December of 6.14×10⁶ m³/s. The mean LST is estimated to be 3.04×10⁶ m³/s. In the upper-layer (0-500 m), the Kuroshio Intrusion takes the shape of Kuroshio Loop with a South China Sea branch of Kuroshio in winter and autumn, while the Kuroshio Intrusion is non-significant with the disappearance of South China Sea branch of Kuroshio in spring and summer. In the deep-layer (>500 m), the southward current of LS is significant in winter and spring with 10 cm/s, while the current become weak in summer and fall. The Luzon Trench is the main channel through in the deep-layer. Multi-core structure is a characteristic of the vertical transport pattern in the LS, with several cores in its southern part and only one core in its northern part. The lag correlation coefficient with six months between LST and Niño 3.4 can reach to 41.6%, which is closely related to the remote influence of ENSO, and there are 2-3 years and 8 years cycle in the inter-annual variation of LST in addition.
- Luzon Strait,
- water transport,
- Kuroshio,
- numerical simulation

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References(29)

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