|
|
Cite this paper: |
|
|
WAN Kai, BAO Xianwen, WANG Yi, WAN Xiuquan, LI Haoqian, LIU Ke. Barotropic current fluctuations coupled with sea level drawdown in Yellow and Bohai Seas[J]. Journal of Oceanology and Limnology, 2015, 33(1): 272-281 |
|
|
|
|
|
|
|
Barotropic current fluctuations coupled with sea level drawdown in Yellow and Bohai Seas |
|
| WAN Kai1,2, BAO Xianwen1,3, WANG Yi1, WAN Xiuquan1,3, LI Haoqian4, LIU Ke5 |
|
1 College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;
2 North China Sea Marine Engineering Prospecting Institute of State Oceanic Administration, Qingdao 266100, China;
3 Key Laboratory of Physical Oceanography, Ministry of Education of China, Ocean University of China, Qingdao 266001, China;
4 North China Sea Marine Forecasting Centre of State Oceanic Administration, Qingdao 266100, China;
5 Qingdao Meteorological Administration, Qingdao 266003, China |
|
| Abstract: |
| Sub-tidal barotropic current variations coupled with residual sea level fluctuation in the Bohai and Yellow Seas during wintertime are addressed in this study. The temporal evolution and spatial distribution of current fluctuation are investigated using moored acoustic Doppler current profiler data in a three-dimensional numerical model. It is found that a southward current followed by a northward current occurred in the northern Yellow Sea during the fluctuation, concurrent with a significant outflow followed by inflow through the Bohai Strait. The process is consistent from surface to bottom and is coupled with remarkable residual sea level fluctuation. This quasi three-day fluctuation with amplitude 0.2-0.3 m/s leads to 1 m/1.2 m drawdown in the northern Yellow and Bohai Seas, respectively, strongly influencing water exchange between those seas. Because this a prominent feature in the seas, it is necessary to evaluate its effect on fluctuation during winter in future studies, in particular, the northward current during the recovery phase of sea level in the Bohai and Yellow Seas regarding seasonal variation. |
|
| Key words:
current fluctuation|sea level fluctuation|sub-tidal variability
|
|
| Received: 2014-03-14 Revised: 2014-04-26 |
|
|
|
|
References:
Clarke A J. 1977. Observational and numerical evidence for wind-forced coastal trapped long waves. Journal of Physical Oceanography, 7 (2): 231-247.
Haidvogel D B, Arango H G, Hedstrom K, Beckmann A, P Malanotte-Rizzoli, Shchepetkin A F. 2000. Model evaluation experiments in the North Atlantic Basin: simulations in nonlinear terrain-following coordinates. Dyn. Atmos. Oceans, 32: 239-281.
Hamon B V. 1962. The spectrums of mean sea level at Sydney, Coff's Harbour, and Lord Howe Island. Journal of Geophysical Research, 67 (13): 5 147-5 155.
Hsueh Y, Romea R D. 1983. A comparison of observed and geostrophically calculated wintertime surface winds over the East China Sea. Journal of Geophysical Research, 88 (C14): 9 588-9 594.
Hsueh Y, Romea R D. 1983. Wintertime winds and coastal sealevel fluctuations in the Northeast China Sea. I: Observations. Journal of Physical Oceanography, 13 (11): 2 091-2 106.
Li K P, Yang K Q. 1983. On the variation of daily mean sea level along the coast of Huanghai Sea. Journal of Oceanography of Huanghai & Bohai Seas, 5 (4): 10-18. (in Chinese with English abstract)
Li K P, Yang K Q. 1983. The non-periodic sea level variation in relation to wind and pressure at the Boahai Bay. Marine Sciences, (2): 12-15. (in Chinese with English abstract)
Li K P. 1984. The spectrum of sea level low-frequency fluctuation in Bohai Sea. Acta Oceanologica Sinica, (4): 433-440. (in Chinese with English abstract)
Li X H, Dong L X. 2011. The low-frequency sea level fluctuation in the Yellow Sea and Bohai Sea during a winter storm. Oceanologia et Limnologia Sinica, 42 (4): 467-473. (in Chinese with English abstract)
Liu F S, Fang D F. 1983. Preliminary analysis of the power spectrum of the tidal residuals in the Bohai Sea. Transactions of Oceanology and Limnology, (4): 1-8. (in Chinese with English abstract)
Mysak L A, Hamon B V. 1969. Low-frequency sea level behavior and continental shelf waves off North Carolina. Journal of Geophysical Research, 74 (6): 1 397-1 405.
Mysak L A. 1967. On the theory of continental shelf waves. J. Mar. Res., 25 (3): 205-227.
Wang W, Li A C, Xu F J, Huang P, Li Y. 2009. Distribution of surface sediments and sedimentary environment in the north Yellow Sea. Oceanologia et Limnologia Sinica, 40 (5): 525-531. (in Chinese with English abstract)
|
|
|
|