The Morning Glory: An Atmospheric Hydraulic Jump

Clarke, R. H.

doi:10.1175/1520-0450(1972)011<0304:tmgaah>2.0.co;2

Cited by 47 publications

(33 citation statements)

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“…Similar solitary wave packets were also observed along the west coast of Cape York Peninsula, Australia (Smith, 1988). Dynamically, the genesis of these atmospheric solitary waves was attributed to hydraulic jumps in the atmosphere, which may be generated by the sea/land breeze front and the katabatic flow along the slopes of mountains (Clarke, 1972). The other type of atmospheric solitary wave characterized by very large amplitude and high phase speed was also observed (Doviak et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

A solitary wave packet in the atmosphere observed from space

Zheng

Yan

Liu

et al. 1998

Geophysical Research Letters

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Section: Introductionmentioning

confidence: 99%

A solitary wave packet in the atmosphere observed from space

Zheng

Yan

Liu

et al. 1998

Geophysical Research Letters

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“…These bores arise due to narrowing estuaries enhancing strong tides so that the tide breaks with dispersion then resolving the breaking wave form into a bore. Bores also occur in the atmosphere, the most well known being glory waves [2,3,4,5], and as internal waves in the ocean [6]. Fluid bores can be of two types, viscous and undular bores, depending on whether viscosity or dispersion, respectively, dominate the evolution [1,7,8].…”

Section: Introductionmentioning

confidence: 78%

Approximate Techniques for Dispersive Shock Waves in Nonlinear Media

Marchant

Smyth

2012

J. Nonlinear Optic. Phys. Mat.

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Many optical and other nonlinear media are governed by dispersive, or diffractive, wave equations, for which initial jump discontinuities are resolved into a dispersive shock wave. The dispersive shock wave smooths the initial discontinuity and is a modulated wavetrain consisting of solitary waves at its leading edge and linear waves at its trailing edge. For integrable equations the dispersive shock wave solution can be found using Whitham modulation theory. For nonlinear wave equations which are hyperbolic outside the dispersive shock region, the amplitudes of the solitary waves at the leading edge and the linear waves at the trailing edge of the dispersive shock can be determined. In this paper an approximate method is presented for calculating the amplitude of the lead solitary waves of a dispersive shock for general nonlinear wave equations, even if these equations are not hyperbolic in the dispersionless limit. The approximate method is validated using known dispersive shock solutions and then applied to calculate approximate dispersive shock solutions for equations governing nonlinear optical media, such as nematic liquid crystals, thermal glasses and colloids. These approximate solutions are compared with numerical results and excellent comparisons are obtained. Abstract Many optical and other nonlinear media are governed by dispersive, or diffractive, wave equations, for which initial jump discontinuities are resolved into a dispersive shock wave. The dispersive shock wave smooths the initial discontinuity and is a modulated wavetrain consisting of solitary waves at its leading edge and linear waves at its trailing edge. For integrable equations the dispersive shock wave solution can be found using Whitham modulation theory. For nonlinear wave equations which are hyperbolic outside the dispersive shock region, the amplitudes of the solitary waves at the leading edge and the linear waves at the trailing edge of the dispersive shock can be determined. In this paper an approximate method is presented for calculating the amplitude of the lead solitary waves of a dispersive shock for general nonlinear wave equations, even if these equations are not hyperbolic in the dispersionless limit. The approximate method is validated using known dispersive shock solutions and then applied to calculate approximate dispersive shock solutions for equations governing nonlinear optical media, such as nematic liquid crystals, thermal glasses and colloids. These approximate solutions are compared with numerical results and excellent comparisons are obtained.

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“…Thirty years later, Clarke (1972) explored the possibility that the phenomenon could be interpreted as a propagating internal hydraulic jump, formed at a discontinuity in the slope of the ground, on a katabatic flow developing on Cape York Peninsula. Clarke's theory was inevitably tentative, since the only available data against which it could be compared were a series of autographic records of surface pressure, wind and temperature at the (now abandoned) weather station at Karumba.…”

Section: Historymentioning

confidence: 99%

A review of research on the dry season mesoscale meteorology of northern Australia

Smith¹,

Reeder²

2014

AMOJ

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Research on the structure and dynamics of a range of dry-season meteorological phenomena that occur around the Gulf of Carpenteria and parts of the arid interior of Australia is reviewed. These include: undular bores; sea breeze circulations; continental cold fronts in the tropics and subtropics; dry lines; and heat lows or heat troughs. The research was initiated by an expedition mounted in 1979 to gather data on the "Morning Glory", a spectacular cloud formation that occurs in the Gulf of Carpentaria region. The Morning Glory was found to have the structure of an undular bore. Studies of the other phenomena were stimulated by attempts to understand the origin of southerly Morning Glories. Some outstanding problems that have emerged from the research are discussed.

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The Morning Glory: An Atmospheric Hydraulic Jump

Cited by 47 publications

References 0 publications

A solitary wave packet in the atmosphere observed from space

A solitary wave packet in the atmosphere observed from space

Approximate Techniques for Dispersive Shock Waves in Nonlinear Media

A review of research on the dry season mesoscale meteorology of northern Australia

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