A modeling study of the effect of wind on Changjiang (Yangtze) River Diluted Water in summer

LIU Baochao; LI Jianping; FENG Licheng

doi:10.3969/j.issn.0253-4193.2013.01.004

Article Contents

Article Navigation > Haiyang Xuebao > 2013 > 35(1): 25-37

LIU Baochao, LI Jianping, FENG Licheng. A modeling study of the effect of wind on Changjiang (Yangtze) River Diluted Water in summer[J]. Haiyang Xuebao, 2013, 35(1): 25-37. doi: 10.3969/j.issn.0253-4193.2013.01.004

Citation:

LIU Baochao, LI Jianping, FENG Licheng. A modeling study of the effect of wind on Changjiang (Yangtze) River Diluted Water in summer[J]. Haiyang Xuebao, 2013, 35(1): 25-37. doi: 10.3969/j.issn.0253-4193.2013.01.004

Citation:

PDF( 5707 KB)

A modeling study of the effect of wind on Changjiang (Yangtze) River Diluted Water in summer

doi: 10.3969/j.issn.0253-4193.2013.01.004

1.
State Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics, Institute of Atmospheric Physics. Chinese Academy of Sciences, Beijing 100029, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics, Institute of Atmospheric Physics. Chinese Academy of Sciences, Beijing 100029, China
3.
National Marine Environmental Forecast Center, Beijing 100081, China

Received Date: 2011-10-08
Rev Recd Date: 2012-05-31

Abstract

Abstract

A three-dimensional hydrodynamic model for Yangtze Estuary and the adjacent sea was developed within the framework of Environmental Fluid Dynamics Code (EFDC). This model was used to study the relationship between winds and Changjiang (Yangtze) River diluted water (CRDW) in summer. Simulated elevations,currents,temperatures and salinities are fairly consistent with observed data. Numerical experiments show that wind plays an important role in the expansion of CRDW. Wind induced Ekman transport would push CRDW to the right of wind direction. At a speed of 5 m/s,easterly,southeasterly,southerly and southwesterly wind push CRDW seaward significantly,while westerly,northwesterly,northerly and northeasterly wind confine CRDW to the coastal area. The Ekman transport is intensified with intensified wind,resulting that more CRDW will be transported to the right of wind direction. Due to stratified water,the turbulence is relatively weak in the axis of the low-salinity tongue. Weak turbulence consumes less wind energy. So the water in the axis of the tongue is accelerated more than water in other areas. Then,more diluted water is transported through the axis area of the low-salinity tongue. Eventually,the width of the tongue becomes smaller with stronger winds. Statistical analysis of observed data also verifies the numerical conclusions.
- diluted water,
- wind,
- Ekman transport,
- Yangtze Estuary,
- EFDC

FullText(HTML)

References(37)

References

毛汉礼,甘子钧,蓝淑芳. 长江冲淡水及其混合问题的初步探讨[J]. 海洋与湖沼,1963,5(3): 183-206.

Lie H J,Cho C H,Lee J H,et al. Structure and eastward extension of the Changjiang River plume in the East China Sea[J]. Journal of Geophysical Research,2003,108(C3): 3077.

Beardsley R C,Limeburner R,Yu H,et al. Discharge of the Changjiang (Yangtze River) into the East China Sea[J]. Continental Shelf Research,1985,4 (1/2): 57-76.

浦泳修,黄韦艮,许建平. 长江冲淡水扩展方向的周、旬时段变化[J]. 东海海洋,2002 (2): 1-5.

浦泳修. 夏季长江冲淡水扩展机制的初析[J]. 东海海洋,1983 (1): 43-51.

乐肯堂. 长江冲淡水路径的初步研究:Ⅰ.模式[J]. 海洋与湖沼,1984 (2): 157-167.

乐肯堂. 长江冲淡水路径问题的初步研究:Ⅱ.风场对路径的作用[J]. 海洋与湖沼,1989(2): 139-148.

赵保仁. 长江冲淡水的转向机制问题[J]. 海洋学报,1991,13(5): 600-610.

廖启煜,郭炳火,刘赞沛. 夏季长江冲淡水转向机制分析[J]. 黄渤海海洋,2001,19 (3): 19-25.

袁耀初,苏纪兰,赵金三. 东中国海陆架环流的单层模式[J]. 海洋学报,1982,4(1): 1-11.

Guan B X. Major Features of the Shallow Water Hydrography in the East China Sea and Huanghai Sea[M]//ICHIYE T. Elsevier Oceanography Series;Elsevier. 1984: 1-13.

顾玉荷. 长江冲淡水转向原因的探讨[J]. 海洋与湖沼,1985,16(5): 354-363.

Wang W S. Yangtze Brackish water plume-circulation and diffusion[J]. Progress in Oceanography,1988,21(3/4): 373-385.

于克俊. 长江口余流和盐度的二维数值计算[J]. 海洋与湖沼,1990,21 (1): 92-96.

朱建荣,李永平,沈焕庭. 夏季风场对长江冲淡水扩展影响的数值模拟[J]. 海洋与湖沼,1997(1): 72-79.

白学志,王凡. 夏季长江冲淡水转向机制的数值试验[J]. 海洋与湖沼,2003,34(6): 593-603.

Shan F,Qiao F L,Xia C S. A numerical study of summertime expansion pattern of Changjiang(Yangtze) River diluted water[J]. Acta Oceanologica Sinica,2009,28 (3):11-16.

Wu H,Zhu J R,Shen J,et al. Tidal modulation on the Changjiang River plume in summer[J]. Journal of Geophysical Research,2011,116,C08017.

周锋,宣基亮,倪晓波,等. 1999年与2006年间夏季长江冲淡水变化动力因素的初步分析[J]. 海洋学报,2009,31(4): 1-12.

Chen C C,Xue P F,Ding P X,et al. Physical mechanisms for the offshore detachment of the Changjiang Diluted Water in the East China Sea[J]. Journal of Geophysical Research,2008,113(C2),C02002.

Moon J H,Pang I C,Yoon J H. Response of the Changjiang diluted water around Jeju Island to external forcings: A modeling study of 2002 and 2006[J]. Continental Shelf Research,2009,29(13),1549-1564.

朱兰部,赵保仁,刘克修. 黄河冲淡水转向问题的初步探讨[J]. 海洋科学集刊,1997(1): 61-67.

庞海龙,高会旺,宋萍萍,等. 夏季珠江冲淡水扩散路径分析[J]. 海洋预报,2006,(3): 58-63.

Shu Y Q,Wang D X,Zhu J,et al. The 4-D structure of upwelling and Pearl River plume in the northern South China Sea during summer 2008 revealed by a data assimilation model[J]. Ocean Modelling,2011,36(3/4): 228-241.

海洋图集编委会. 渤海黄海东海海洋图集(水文)[M]. 海洋出版社,1992: 13-168.

赵万星. 长江、嘉陵江重庆主城区段的环境流体动力学模拟. 重庆:重庆大学,2005.

郑晓琴. 长江口及邻近海域温盐时空变化数值模拟. 上海:华东师范大学,2008.

Ji Z G,Morton M R,Hamrick J M. Wetting and drying simulation of estuarine processes[J]. Estuarine,Coastal Shelf Sci,2001,53: 683-700.

Ji Z G. Hydrodynamics and water quality: modeling rivers,lakes,and estuaries[M]. John Willy and Sons Inc,2008.

Jiang H Z,Shen Y M,Wang S D. Numerical study on salinity stratification in the Oujiang River Estuary[J]. Journal of Hydrodynamics,2009,21(6): 835-842.

Kong Q R,Jiang C B,Qin J J,et al. Sediment transportation and bed morphology reshaping in Yellow River Delta[J]. Science in China(Series E:Technological Sciences),2009,52(11): 3382-3390.

Li X,Wang Y G,Zhang S X. Numerical simulation of water quality in Yangtze Estuary[J]. Water Science and Engineering,2009,2(4): 40-51.

谢锐,吴德安,严以新,等. EFDC模型在长江口及相邻海域三维水流模拟中的开发应用[J]. 水动力学研究与进展:A辑,2010,25(2): 165-174.

Xu H Z,Lin J,Wang D X. Wind impact on pollutant transport in a shallow estuary[J]. Acta Oceanologica Sinica,2008,27(3): 147-160.

Hamrick J M. A three-dimensional environmental fluid dynamics computer code: Theoretical and computational aspects[M]. Virginia Institute of Marine Science,College of William and Mary,1992.

Matsumoto K,Takanezawa T,Ooe M. Ocean tide models developed by assimilating TOPEX/POSEIDON altimeter data into hydrodynamical model: A global model and a regional model around Japan[J]. Journal of Oceanography,2000,56(5): 567-581.

Bleck R. An oceanic general circulation model framed in hybrid isopycnic-Cartesian coordinates[J]. Ocean Modelling,2002,4(1): 55-88.

Relative Articles

Supplements(0)

Cited By

Proportional views