A High Resolution Spatial and Temporal Multiple Doppler Analysis of a Microburst and Its Application to Aircraft Flight Simulation

Elmore, Kimberly L.; McCarthy, John; Frost, W.; Chang, Ho-Pen

doi:10.1175/1520-0450(1986)025<1398:ahrsat>2.0.co;2

Cited by 15 publications

(3 citation statements)

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“…Despite its small horizontal scale, an intense microburst can induce damaging winds as strong as 75 m s −1 (270 km h −1 ). For such reasons microbursts can be specially dangerous to aircraft during takeoff and landing manoeuvres due to the intense wind shear accompanying them (Elmore et al, 1986). Microbursts have been the subject of several observational and numerical studies since the pioneering works of Fujita (1985).…”

Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulation of a microburst

et al. 2011

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Abstract. The three-dimensional structure and evolution of an isolated and stationary microburst are simulated using a time-dependent, high resolution Large-Eddy-Simulation (LES) model. The microburst is initiated by specifying a simplified cooling source at the top of the domain around 2 km a.g.l. that leads to a strong downdraft. Surface winds of the order of 30 m s −1 were obtained over a region of 500 m radius around the central point of the impinging downdraft, with the simulated microburst lasting for a few minutes. These characteristic length and time scales are consistent with results obtained from numerical simulations of microbursts using cloud-resolving models. The simulated flow replicated some of the principal features of microbursts observed by Doppler radars: in particular, the horizontal spread of strong surface winds and a ring vortex at the leading edge of the cold outflow. In addition to the primary surface outflow, the simulation also generated a secondary surge of strong winds that appears to represent a pulsation in the microburst evolution.These results highlight the capability of LES to reproduce complex phenomena like microbursts, indicating the potential usage of LES models to represent atmospheric phenomena of time and space scales between the convective scale and the microscale. These include short-lived convectivelygenerated damaging winds.

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Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulation of a microburst

et al. 2011

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“…The kinematic structure of the 5 August 1982 case was reported in Elmore Unlike the k�ematic study by Elmore et al (1986), our study is focused on the dynamic and thermodynamic study of a microburst-producing storm via a thermodynamic retrieval method. As noted earlier, this type of study req _u ires first, second and third derivatives in velocity.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Observational Study of a Multiple Microburst-Producing Storm Part I: Kinematic, Dynamic and Thermodynamic Structures

Lin¹,

William²,

Coover³

1991

Terr. Atmos. Ocean. Sci.

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“…In spite of its small horizontal scale, an intense microburst could induce straight or curved damaging winds with speeds as high as 75 m s −1 . Due to the intense wind shear accompanying them, microbursts can be specially dangerous to aircraft during takeoff and landing procedures [ Elmore et al , ]. For this reason the understanding of their formation and development is extremely important for risk assessment purposes.…”

Section: Introductionmentioning

confidence: 99%

Physical simulation of atmospheric microbursts

et al. 2014

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A laboratory simulation of atmospheric microbursts is presented. The physical model of the atmospheric phenomenon is reproduced at a reduced scale in a rotating tank (TURLab, Italy), the similitude is based on the Froude number. Different experiments were carried out varying the Rossby number, and the analysis of four significant cases is presented. The velocity, vorticity, and turbulent kinetic energy fields are evaluated together with the swirling strength analysis. The comparison with the natural prototype is eventually shown and discussed.

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A High Resolution Spatial and Temporal Multiple Doppler Analysis of a Microburst and Its Application to Aircraft Flight Simulation

Cited by 15 publications

References 0 publications

Large-Eddy Simulation of a microburst

Large-Eddy Simulation of a microburst

Observational Study of a Multiple Microburst-Producing Storm Part I: Kinematic, Dynamic and Thermodynamic Structures

Physical simulation of atmospheric microbursts

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