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Psi-Chi Interactions in Hurricane Model Forecasts with Rapidly Changing Intensity

Title: Psi-Chi Interactions in Hurricane Model Forecasts with Rapidly Changing Intensity.
Name(s): Thompson, Aarolyn, author
Krishnamurti, T. N., professor directing thesis
Hart, Robert E., committee member
Misra, Vasubandhu, committee member
Department of Earth, Ocean and Atmospheric Sciences, degree granting department
Florida State University, degree granting institution
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2011
Publisher: Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Rapid intensity changes in hurricanes have been the focus of many publications. Understanding how and why these storms intensify has been the goal of many meteorologists over the last few years. This study explores the energetics of Psi-Chi interactions in modeled hurricanes of rapidly changing intensity. The energy exchanged within the storm as the flow changes from divergent to rotational is known as Psi-Chi interactions. Processes associated with latent heant and sensible heat exchanges are important when it comes to identifying changes in hurricane intensity. Understanding this interaction with the environment is crucial to understanding how the intensity changes. Model data derived from the fifth generation model from NCAR/Penn State known as the MM5 is used to calculate each term within the Psi-Chi equation. Each term is then calculated within the storm and its maximum values as well as location of maximum values within the storm are noted. The maximum value of each term and location of each term allows for an investigation of a connection between the energy exchange of the storm and its intensity. The maximum values of the terms of Psi-Chi interactions are also compared to the model intensity of each storm. Based on the comparison of model intensity and maximum term values there appears to be a strong relationship between the two (correlation values near r = 0.87), although further study is needed to determine if this simultaneous relationship can be extended to a lagged relationship to provide predictive value to forecasters.
Identifier: FSU_migr_etd-1419 (IID)
Submitted Note: A Thesis Submitted to the Department of Earth, Ocean and Atmospheric Science in Partial Fulfillment of the Requirements for the Degree of Master of Science.
Degree Awarded: Summer Semester, 2011.
Date of Defense: March 7, 2011.
Keywords: Hurricane, Psi Chi, Intensity
Bibliography Note: Includes bibliographical references.
Advisory committee: T. N. Krishnamurti, Professor Directing Thesis; Robert E. Hart, Committee Member; Vasubandhu Misra, Committee Member.
Subject(s): Oceanography
Atmospheric sciences
Persistent Link to This Record:
Owner Institution: FSU

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Thompson, A. (2011). Psi-Chi Interactions in Hurricane Model Forecasts with Rapidly Changing Intensity. Retrieved from