Observations of a Phenomenal Temperature Perturbation in Tropical Cyclone Kerry (1979)

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  • 1 Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80521
  • | 2 Bureau of Meteorology, Melbourne, Australia
  • | 3 Bureau of Meteorology, Brisbane, Australia
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Abstract

Observations are presented of a phenomenal upper tropospheric mesoscale temperature perturbation arising from the interaction between dissipating Tropical Cyclone Kerry (1979) and a midlatitude trough in the westerlies, which we describe as a black hole from its appearance on satellite imagery. We propose that this perturbation arose from dynamically forced subsidence along a confluence between the environments flow and outflow from a major convective complex. The frequency of occurrence and subsequent adjustment of the atmosphere is described and discussed.

Abstract

Observations are presented of a phenomenal upper tropospheric mesoscale temperature perturbation arising from the interaction between dissipating Tropical Cyclone Kerry (1979) and a midlatitude trough in the westerlies, which we describe as a black hole from its appearance on satellite imagery. We propose that this perturbation arose from dynamically forced subsidence along a confluence between the environments flow and outflow from a major convective complex. The frequency of occurrence and subsequent adjustment of the atmosphere is described and discussed.

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