Journal of Tropical Oceanography ›› 2021, Vol. 40 ›› Issue (2): 7-16.doi: 10.11978/2020057CSTR: 32234.14.2020057
• Marine Hydrology • Previous Articles Next Articles
Numerical simulation of barotropic tides in Mozambique Strait and its adjacent coastal area and energy budget analysis*
ZHANG Hua1,4(
), WEN Xixi1, PENG Shiqiu1,2,3,4()
- 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
2. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
3. Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China
4. University of Chinese Academy of Sciences, Beijing 100049, China
-
Received:2020-05-27Revised:2020-07-20Online:2021-03-10Published:2020-07-21 -
Contact:PENG Shiqiu E-mail:zhangh1201@163.com;speng@scsio.ac.cn -
Supported by:National Natural Science Foundation of China(41931182);National Natural Science Foundation of China(41521005);National Natural Science Foundation of China(41676016);Guangdong Key Project(2019BT2H594);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(GML2019ZD0303);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(GML2019ZD0304);Key Deployment Projects of the Chinese Academy of Sciences(ZDRW-XH-2019-2);Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences(ISEE2018PY05);Independent Research Project Program of State Key Laboratory of Tropical Oceanography under contract(LTOZZ1902);Independent Research Project Program of State Key Laboratory of Tropical Oceanography under contract(LTOZZ1802)
CLC Number:
- P731.2
Cite this article
ZHANG Hua, WEN Xixi, PENG Shiqiu. Numerical simulation of barotropic tides in Mozambique Strait and its adjacent coastal area and energy budget analysis*[J].Journal of Tropical Oceanography, 2021, 40(2): 7-16.
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Fig. 1
Bathymetry and tidal station distributions used. Also in the diagram are currents in Mozambique Strait and its adjacent coastal area The stations are represented by black triangles; The currents are represented by green solid lines; Dashed arrow in the Mozambique Strait shows the effect of eddy propagation"
Fig. 1
Tab. 1
Comparison between model results and tide station analysis results"
| 编号 | 站名 | 南纬 | 东经 | M2 | S2 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 振幅/cm | 迟角/(°) | 振幅/cm | 迟角/(°) | ||||||||
| 观测 | 模拟 | 观测 | 模拟 | 观测 | 模拟 | 观测 | 模拟 | ||||
| 1 | Mobasa | 4°04′ | 39°39′ | 104.46 | 86.53 | 25.99 | 35.70 | 51.39 | 41.27 | 64.88 | 39.10 |
| 2 | Dar Es Salaam | 6°49′ | 39°17′ | 107.07 | 96.25 | 29.29 | 38.86 | 52.74 | 46.12 | 70.04 | 43.09 |
| 3 | Praslin | 4°21′ | 55°46′ | 35.71 | 40.92 | 11.61 | 18.10 | 15.77 | 17.27 | 52.36 | 24.53 |
| 4 | Port Victoria | 4°37′ | 55°28′ | 40.22 | 43.66 | 12.21 | 18.90 | 17.77 | 18.24 | 52.37 | 25.12 |
| 5 | Pt. La Rue | 4°40′ | 55°32′ | 39.68 | 43.67 | 14.18 | 18.60 | 17.68 | 18.14 | 51.78 | 24.79 |
| 6 | Lamu | 2°16′ | 40°54′ | 98.47 | 81.86 | 32.28 | 35.25 | 48.12 | 38.98 | 73.79 | 38.80 |
| 7 | Nosy Be | 13°24′ | 48°18′ | 108.42 | 101.50 | 22.30 | 37.28 | 56.41 | 48.02 | 62.77 | 40.21 |
| 8 | Zanzibar | 6°09′ | 39°11′ | 120.59 | 127.61 | 25.43 | 82.74 | 60.90 | 55.43 | 64.65 | 93.20 |
| 9 | Dzaoudzi | 12°47′ | 45°16′ | 104.82 | 91.62 | 27.16 | 36.37 | 53.27 | 43.47 | 67.52 | 38.62 |
| 10 | Reunion | 20°56′ | 55°17′ | 17.84 | 22.98 | 282.83 | 341.79 | 9.11 | 7.43 | 297.89 | 292.63 |
| 11 | Durban | 29°52′ | 31°03′ | 55.81 | 52.86 | 44.36 | 65.91 | 31.30 | 24.20 | 76.07 | 49.64 |
| 12 | Port Elizabeth | 33°58′ | 25°38′ | 52.41 | 38.86 | 43.72 | 71.91 | 27.17 | 18.11 | 69.86 | 40.47 |
| 15 | Pemba | 12°58′ | 40°29′ | 113.43 | 98.36 | 29.12 | 40.90 | 57.49 | 47.78 | 71.11 | 42.71 |
| 16 | Nacala | 14°28′ | 40°41′ | 102.26 | 99.85 | 28.55 | 42.81 | 59.67 | 48.82 | 66.39 | 43.84 |
| r | 0.97 | 0.99 | 0.99 | 0.98 | |||||||
| RMSE | 10.32 | 25.31 | 7.45 | 26.63 | |||||||
Tab. 1
Fig. 2
Scatter diagrams of barotropic model results and tidal station data The amplitudes of tides (a) M2 and (b) S2 (units: cm); phase of tides (c) M2 and (d) S2 (phase based on Greenwich mean time)"
Fig. 2
Fig. 3
Distribution of tidal constituents The color scale: 0 ~ 0.5 for regular semidiurnal tide, 0.5 ~ 2.0 for irregular semidiurnal tide, 2.0 ~ 4.0 for irregular diurnal tide, and > 4.0 for regular diurnal tide"
Fig. 3
Fig. 4
Co-tidal charts in the Mozambique Strait and its adjacent coastal area (a) M2 and (b) S2 constituents. The black solid line indicates the amplitudes (units: cm) and the color indicates phase (based on Greenwich mean time)"
Fig. 4
Fig. 5
Elliptical maps of surface tidal current (a) M2 and (b) S2 constituents. The color indicates the rotation rate of ellipse. Positive values (red) indicate counterclockwise rotation of the tidal current ellipse, and negative values (blue) indicate clockwise rotation of the tidal current ellipse"
Fig. 5
Fig. 6
Tidal energy flux in the Mozambique Strait and its adjacent coastal area Model results (a) and OTIS (b) calculated tidal energy flux distributions of M2 constituent. Model results (c) and OTIS (d) calculated tidal energy flux distribution of S2 constituent. The value near the section indicates the tidal energy flux through the section. Positive value indicates eastward or northward transport, and negative value is the opposite. Sections A1, A2, A3, and A4 are located along 16°12′S, 46°E, 14°S, and 49°18′E, respectively"
Fig. 6
Fig. 7
Tidal energy dissipation induced by bottom friction in the Mozambique Strait and its adjacent coastal area (logarithmic (log10) scale is used here) (a) M2 and (b) S2 constituents. The red box is the north of Madagascar, the black box is the Mozambique Strait, and the yellow box is the south of Madagascar. The value in the box represents the tidal energy dissipation value in this area, the number in the top of figure represents the dissipation value of the whole study area (units: GW)"
Fig. 7
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