How Does Air-Sea Wave Interaction Affect Tropical Cyclone Intensity? An Atmosphere-Wave-Ocean Coupled Model Study Based on Super Typhoon Mangkhut (2018)
AffiliationDepartment of Hydrology and Atmospheric Sciences, University of Arizona
momentum and heat exchange
MetadataShow full item record
PublisherJohn Wiley and Sons Inc
CitationLi, Z., Tam, C.-Y., Li, Y., Lau, N.-C., Chen, J., Chan, S. T., Dickson Lau, D.-S., & Huang, Y. (2022). How Does Air-Sea Wave Interaction Affect Tropical Cyclone Intensity? An Atmosphere-Wave-Ocean Coupled Model Study Based on Super Typhoon Mangkhut (2018). Earth and Space Science.
JournalEarth and Space Science
RightsCopyright © 2022 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractCapturing TC intensity change remains a great challenge for most state-of-the-art operational forecasting systems. Recent studies found TC intensity forecasts are sensitive to three-dimensional ocean dynamics and air-sea interface processes beneath extreme winds. By performing a series of numerical simulations based on hierarchical atmosphere-wave-ocean (AWO) coupling configurations, we showed how atmosphere-ocean and atmosphere-sea wave coupling can affect the intensity of super typhoon Mangkhut (2018). The AWO coupled model can simulate TC-related strong winds, oceanic cold wake, and wind waves with high fidelity. With atmosphere-ocean (AO) coupling implemented, the simulated maximum surface wind speed is reduced by 7 m s−1 compared to the atmosphere-only run, due to TC-induced oceanic cold wakes in the former experiment. In the fully coupled AWO simulations, the wind speed deficit can be completely compensated by the wave-air coupling effect. Further analyses showed that, in the AWO experiment, two mechanisms contribute to the improvement of TC intensity. First, in the high wind scenario (>28 m s−1), the surface drag coefficient reaches an asymptotic level, assisting extreme wind speed to be maintained within the eyewall. Second, the wind speed distribution is modulated and becomes broader; higher wind within the TC area helps to offset the negative effect due to leveling off of the heat exchange coefficient as wind speed increases. Overall, the simulated TC in the AWO run can extract 8–9% more total heat energy from the ocean to maintain its strength, compared to that from the AO experiment. © 2022 The Authors.
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Except where otherwise noted, this item's license is described as Copyright © 2022 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License.