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Impact of Sea Surface Temperature on Spontaneous Cyclogenesis in Rotating Radiative-convective Equilibrium Simulations

Title: The Impact of Sea Surface Temperature on Spontaneous Cyclogenesis in Rotating Radiative-convective Equilibrium Simulations.
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Name(s): Leathe, Dylan Alexander, author
Type of Resource: text
Genre: Text
Bachelor Thesis
Date Issued: 2020-04-06
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We simulate tropical cyclone (TC) formation using the idealized framework of rotating radiative-convective equilibrium. Rather than initializing the model with a weak vortex, we allow convection to spontaneously organize into a TC. The cloud-resolving simulations are performed with fully interactive radiation and surface fluxes. In order to determine how a changing climate impacts the intrinsic properties of a TC, simulations are run under different fixed sea-surface temperatures (SST). The objective is to determine how different properties of spontaneous cyclogenesis depend on SST. Using the model data, properties of the simulated TCs such as maximum intensity, rate of intensification, and time to genesis are computed and compared between the different temperatures. Results show that at higher SSTs, the intensification rate and maximum intensity of the TC is greater than lower temperatures, as expected from potential intensity theory and observational studies. At higher temperatures, the time to TC genesis is longer than at colder SSTs. We additionally compute a budget for the spatial variance of column-integrated frozen moist static energy. This allows for the feedback processes leading to cyclogenesis to be examined and compared across the SSTs. Results show that the normalized surface flux feedback decreases with increasing SST and that there is no correlation between the normalized longwave feedback and SST.
Identifier: FSU_libsubv1_scholarship_submission_1587052999_a368083c (IID)
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1587052999_a368083c
Host Institution: FSU

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Leathe, D. A. (2020). The Impact of Sea Surface Temperature on Spontaneous Cyclogenesis in Rotating Radiative-convective Equilibrium Simulations. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1587052999_a368083c