Tropical Cyclones

Fendell, Francis E.

doi:10.1016/s0065-2687(08)60252-6

Cited by 6 publications

(3 citation statements)

References 93 publications

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“…However, fluid particles along those streamlines in close proximity to the interface have abbreviated residence in the boundary layer during transfer from the bulk vortex I to the lower core III. Accordingly, for reasons of Towards modular analysis of tropical-cyclone structure: the boundary layer 229 stability, the swirl, and thus the absolute angular momentum, are taken to be constant across the interface (Carrier et al 1971, p. 149), although the swirl varies along the radially outwardly inclined interface (Palmèn & Newton 1969;Fendell 1974).…”

Section: Some Issues Accentuated By a Modular Approachmentioning

confidence: 99%

“…It is disconcerting that intensity-related results obtained from many, if not most, tropicalcyclone models are very sensitive to the uncertain values assigned to parameters appearing in conventional formulations of boundary conditions at the air-sea interface (Eliassen & Lystad 1977;Montgomery, Smith & Nguyen 2010). Here, care is taken to incorporate the enthalpy transport into the boundary layer associated with downdrift from the overlying bulk-vortex module (Carrier et al 1971;Fendell 1974), as an important complement to roughly ambient-level sea-air transfer of enthalpy.…”

Section: Energeticsmentioning

confidence: 99%

“…At that time, George Carrier and his colleagues (Carrier, Hammond & George 1971;Carrier 1971a,b;Fendell 1974) suggested that the major impediment to upgraded intensity forecasts lay in incomplete knowledge and misconceptions regarding the macroscale thermofluid-dynamics, rather than in shortcoming in the inclusiveness of parameterizations.…”

Section: Introductionmentioning

confidence: 99%

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Towards modular analysis of tropical-cyclone structure: the boundary layer

Fendell

Mokhasi

2013

J. Fluid Mech.

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In the early 1970s, George Carrier and coworkers undertook a modular approach to modelling the internal thermofluid-dynamics of tropical cyclones of tropicaldepression-or-greater intensity. A novel, relatively simplistic, approximate analysis of the vortex, idealized as axisymmetric, was carried out in the asymptotic limit of large Reynolds number, so that inviscid and diffusive subdomains of the structure were distinguished. Little subsequent work has followed this line of investigation. The indifference has proven problematic because accurate prediction of tropical-cycling intensity remains a challenge for operational forecasting, despite decades of effort at direct integration of comprehensive boundary/initial-value formulations. A contributing factor is that, to achieve solution in real time, such computational treatment of the entire vortex invariably resorts to coarse gridding, and key features remain inadequately resolved. Accordingly, here the modular approach is revisited, with the assistance of: recent observational insights; greatly enhanced computer-processing power; and convenient computational software, which facilitates implementation of a semi-analytic, semi-numerical methodology. Focus is largely, but not exclusively, on the dynamics and energetics occurring in the nominally kilometre-thick, ocean-surfacecontiguous boundary layer, especially on influx to the boundary layer and efflux therefrom. The modular approach not only permits the boundary layer, which develops its own highly significant substructure under the high-speed portion of the inviscid vortex, to be well-resolved, but also allows the layer to be investigated in the context of the other tropical-cyclone-structure subdivisions.

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Section: Some Issues Accentuated By a Modular Approachmentioning

confidence: 99%

Section: Energeticsmentioning

confidence: 99%

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Towards modular analysis of tropical-cyclone structure: the boundary layer

Fendell

Mokhasi

2013

J. Fluid Mech.

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Motions in planetary atmospheres

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1976

Quart J Royal Meteoro Soc

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Conjecture about a hurricane system in the Jovian atmosphere

1985

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Kuiper (1972) had suggested that the Great Red Spot (GRS) of Jupiter is a giant hurricane. We present further arguments in support of this idea and propose that it may also apply to the smaller vortices such as the white and brown ovals (barges). Our estimates indicate that the spin-down timeconstants for these Jovian vortices are significantly shorter than the observed lifetimes. Thus, the motions must be sustained through the continued release of internal energy. In analogy with the CISK mechanism for the terrestrial hurricane, transport of water vapor, which is observed on Jupiter, may provide the latent energy to fuel the motions. The energy the planet emits must be transported upwards; therefore its troposphere should be convectively unstable. In such an atmosphere, the proposed solar driven meridional circulation is multicellular, of the Ferrel-Thomson type. If the energy transport from the planetary interior is accelerated by the upward motions in the circulation, eastward zonal jets develop such as observed in the equatorial region. But if the upward flow of energy is impeded by the prevailing downward motions in the meridional circulation (which occur, for example, near 20" latitude), we propose that the convective instability is amplified. The conditions then are more favorable for the development of hurricanes which may appear in the form of the GRS and the white and brown ovals. The GRS with its large size and long life time (indicating that it is very deep) is unique, and we suggest that it may have been induced by meteor impact.

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Tropical Cyclones

Cited by 6 publications

References 93 publications

Towards modular analysis of tropical-cyclone structure: the boundary layer

Towards modular analysis of tropical-cyclone structure: the boundary layer

Motions in planetary atmospheres

Conjecture about a hurricane system in the Jovian atmosphere

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