Comments on "An evaluation of hurricane superintensity in axisymmetric numerical models" by Rapha\"el Rousseau-Rizzi and Kerry Emanuel
Journal of the Atmospheric Sciences 77: 3971 (2020) In a recent paper Rousseau-Rizzi and Emanuel (2019) presented a derivation of an upper limit on maximum hurricane velocity at the surface. This derivation was based on a consideration of an infinitely narrow (differential) Carnot cycle with the war...
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Main Authors | , , , , , , |
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Format | Journal Article |
Language | English |
Published |
23.05.2020
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Subjects | |
Online Access | Get full text |
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Summary: | Journal of the Atmospheric Sciences 77: 3971 (2020) In a recent paper Rousseau-Rizzi and Emanuel (2019) presented a derivation of
an upper limit on maximum hurricane velocity at the surface. This derivation
was based on a consideration of an infinitely narrow (differential) Carnot
cycle with the warmer isotherm at the point of the maximum wind velocity. Here
we show that this derivation neglected a significant term describing the
kinetic energy change in the outflow. Additionally, we highlight the importance
of a proper accounting for the power needed to lift liquid water. Finally, we
provide a revision to the formula for surface fluxes of heat and momentum
showing that, if we accept the assumptions adopted by Rousseau-Rizzi and
Emanuel (2019), the resulting velocity estimate does not depend on the flux of
sensible heat. |
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DOI: | 10.48550/arxiv.2005.11522 |