Comments on 'An Evaluation of Hurricane Superintensity in Axisymmetric Numerical Models'
| Autor: | Günter Plunien, Alexander V. Chikunov, Andrei V. Nefiodov, Anastassia M. Makarieva, Antonio Donato Nobre, Douglas Sheil, B.-L. Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences 020209 energy 0202 electrical engineering electronic engineering information engineering Rotational symmetry 02 engineering and technology Numerical models Mechanics 01 natural sciences Physics::Atmospheric and Oceanic Physics Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of the Atmospheric Sciences. 77:3971-3975 |
| ISSN: | 1520-0469 0022-4928 |
| DOI: | 10.1175/jas-d-20-0156.1 |
| Popis: | In a recent paper Rousseau-Rizzi and Emanuel (2019) presented a derivation of an upper limit on maximum hurricane velocity at the ocean 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|