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- Author or Editor: Francis J. Merceret x
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Abstract
Conventional techniques for determining which features of hurricanes govern their distribution of kinetic energy dissipation rate (ε) fail to yield significant correlations because of the high random variability of ε. Spectral analysis of the time series of the logarithm of ε, however, shows several distinct features which may be tentatively identified with specific aspects of the storm circulation. In particular, cloud-scale, cloud-cluster-scale and rainband-scale peaks occur in the power spectrum of log10ε.
Abstract
Conventional techniques for determining which features of hurricanes govern their distribution of kinetic energy dissipation rate (ε) fail to yield significant correlations because of the high random variability of ε. Spectral analysis of the time series of the logarithm of ε, however, shows several distinct features which may be tentatively identified with specific aspects of the storm circulation. In particular, cloud-scale, cloud-cluster-scale and rainband-scale peaks occur in the power spectrum of log10ε.
Abstract
Microscale horizontal velocity fluctuation measurements in Hurricane Caroline (1975) show that except in the eye, turbulent energy dissipation does not vary systematically with wind speed or altitude. Inertial subrange-shaped spectra are found below cloud base and slightly above it. At higher altitudes, some deviation from that shape may occur. The amount of energy dissipated within the body of the storm is slightly larger than that dissipated at the surface in accord with earlier estimates by residuals. The dissipation is highly intermittent with a log-normal cumulative probability distribution.
Abstract
Microscale horizontal velocity fluctuation measurements in Hurricane Caroline (1975) show that except in the eye, turbulent energy dissipation does not vary systematically with wind speed or altitude. Inertial subrange-shaped spectra are found below cloud base and slightly above it. At higher altitudes, some deviation from that shape may occur. The amount of energy dissipated within the body of the storm is slightly larger than that dissipated at the surface in accord with earlier estimates by residuals. The dissipation is highly intermittent with a log-normal cumulative probability distribution.
Abstract
Airborne foil impactor measurements in Atlantic Hurricane Ginger (1971) show a raindrop size spectrum which is well represented by an exponential relation of the Marshall-Palmer type. No difference was observed between the spectral characteristics of the rainbands and those of the eyewall, but some dependence of the slope-rainfall rate relation on rainwater content was noted.
Abstract
Airborne foil impactor measurements in Atlantic Hurricane Ginger (1971) show a raindrop size spectrum which is well represented by an exponential relation of the Marshall-Palmer type. No difference was observed between the spectral characteristics of the rainbands and those of the eyewall, but some dependence of the slope-rainfall rate relation on rainwater content was noted.
Abstract
Low-level flight data from a small cloud-free area along the periphery of Hurricane Eloise (1975) reveal the existence of a well-mixed boundary layer which is capped by a near-isothermal layer. The isothermal layer is probably created by the combined effect of subsiding air and surface-induced turbulence.
Abstract
Low-level flight data from a small cloud-free area along the periphery of Hurricane Eloise (1975) reveal the existence of a well-mixed boundary layer which is capped by a near-isothermal layer. The isothermal layer is probably created by the combined effect of subsiding air and surface-induced turbulence.
