Observations of Polarity Reversal in Shoaling Nonlinear Internal Waves

被引:97
|
作者
Shroyer, E. L. [1 ]
Moum, J. N. [1 ]
Nash, J. D. [1 ]
机构
[1] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA
关键词
SLOPE-SHELF TOPOGRAPHY; SOLITARY WAVES; CONTINENTAL-SHELF; DISSIPATION; TURBULENCE; TRANSPORT; SOLITONS;
D O I
10.1175/2008JPO3953.1
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Observations off the New Jersey coast document the shoaling of three groups of nonlinear internal waves of depression over 35 km across the shelf. Each wave group experienced changing background conditions along its shoreward transit. Despite different wave environments, a clear pattern emerges. Nearly symmetric waves propagating into shallow water develop an asymmetric shape; in the wave reference frame, the leading edge accelerates causing the front face to broaden while the trailing face remains steep. This trend continues until the front edge and face of the leading depression wave become unidentifiable and a near-bottom elevation wave emerges, formed from the trailing face of the initial depression wave and the leading face of the following wave. The transition from depression to elevation waves is diagnosed by the integrated wave vorticity, which changes sign as the wave's polarity changes sign. This transition is predicted by the sign change of the coefficient of the nonlinear term in the KdV equation, when evaluated using observed profiles of stratification and velocity.
引用
收藏
页码:691 / 701
页数:11
相关论文
共 50 条
  • [31] Numerical simulations of shoaling internal solitary waves of elevation
    Xu, Chengzhu
    Subich, Christopher
    Stastna, Marek
    PHYSICS OF FLUIDS, 2016, 28 (07)
  • [32] OBSERVATIONS OF BISPECTRA OF SHOALING SURFACE GRAVITY-WAVES
    ELGAR, S
    GUZA, RT
    JOURNAL OF FLUID MECHANICS, 1985, 161 : 425 - 448
  • [33] MEASURED INTERNAL KINEMATICS FOR SHOALING WAVES WITH THEORETICAL COMPARISONS
    GRIFFITHS, MW
    EASSON, WJ
    GREATED, CA
    JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING-ASCE, 1992, 118 (03): : 280 - 299
  • [34] Internal solitary waves shoaling and breaking on uniform slopes
    Lab des Ecoulements Geophysiques et, Industriels, Grenoble, France
    Proc Int Offshore Polar Eng Conf, (217-222):
  • [35] Internal solitary waves of elevation advancing on a shoaling shelf
    Klymak, JM
    Moum, JN
    GEOPHYSICAL RESEARCH LETTERS, 2003, 30 (20)
  • [36] Numerical study on the polarity change process during internal wave shoaling
    Wang, Xueyu
    Wen, Zehua
    Zou, Li
    Ma, Xinyu
    Yu, Zongbing
    Zhao, Tao
    PHYSICS OF FLUIDS, 2024, 36 (09)
  • [37] Observations of nonlinear internal waves at a persistent coastal upwelling front
    Walter, Ryan K.
    Stastna, Marek
    Woodson, C. Brock
    Monismith, Stephen G.
    CONTINENTAL SHELF RESEARCH, 2016, 117 : 100 - 117
  • [38] Very large internal waves in the ocean - observations and nonlinear models
    Grue, John
    WAVES IN GEOPHYSICAL FLUIDS: TSUNAMIS, ROGUE WAVES, INTERNAL WAVES AND INTERNAL TIDES, 2006, (489): : 205 - 270
  • [39] Shoaling of large-amplitude nonlinear internal waves at Dongsha Atoll in the northern South China Sea
    Fu, Ke-Hsien
    Wang, Yu-Huai
    St Laurent, Louis
    Simmons, Harper
    Wang, Dong-Ping
    CONTINENTAL SHELF RESEARCH, 2012, 37 : 1 - 7
  • [40] SHOALING GRAVITY-WAVES - COMPARISONS BETWEEN FIELD OBSERVATIONS, LINEAR-THEORY, AND A NONLINEAR MODEL
    ELGAR, S
    GUZA, RT
    JOURNAL OF FLUID MECHANICS, 1985, 158 (SEP) : 47 - 70