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Azimuthally Averaged Wind and Thermodynamic Structures of Tropical Cyclones in Global Climate Models and Their Sensitivity to Horizontal Resolution

Author(s): Moon, Yumin; Kim, Daehyun; Camargo, Suzana J; Wing, Allison A; Sobel, Adam H; et al

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dc.contributor.authorMoon, Yumin-
dc.contributor.authorKim, Daehyun-
dc.contributor.authorCamargo, Suzana J-
dc.contributor.authorWing, Allison A-
dc.contributor.authorSobel, Adam H-
dc.contributor.authorMurakami, Hiroyuki-
dc.contributor.authorReed, Kevin A-
dc.contributor.authorScoccimarro, Enrico-
dc.contributor.authorVecchi, Gabriel A-
dc.contributor.authorWehner, Michael F-
dc.contributor.authorZarzycki, Colin M-
dc.contributor.authorZhao, Ming-
dc.date.accessioned2022-01-25T14:59:43Z-
dc.date.available2022-01-25T14:59:43Z-
dc.date.issued2020-02-15en_US
dc.identifier.citationMoon, Yumin, Daehyun Kim, Suzana J. Camargo, Allison A. Wing, Adam H. Sobel, Hiroyuki Murakami, Kevin A. Reed et al. "Azimuthally averaged wind and thermodynamic structures of tropical cyclones in global climate models and their sensitivity to horizontal resolution." Journal of Climate 33, no. 4 (2020): 1575-1595. doi:10.1175/JCLI-D-19-0172.1.en_US
dc.identifier.issn0894-8755-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1qn5zb14-
dc.description.abstractCharacteristics of tropical cyclones (TCs) in global climate models (GCMs) are known to be influenced by details of the model configurations, including horizontal resolution and parameterization schemes. Understanding model-to-model differences in TC characteristics is a prerequisite for reducing uncertainty in future TC activity projections by GCMs. This study performs a process-level examination of TC structures in eight GCM simulations that span a range of horizontal resolutions from 1° to 0.25°. A recently developed set of process-oriented diagnostics is used to examine the azimuthally averaged wind and thermodynamic structures of the GCM-simulated TCs. Results indicate that the inner-core wind structures of simulated TCs are more strongly constrained by the horizontal resolutions of the models than are the thermodynamic structures of those TCs. As expected, the structures of TC circulations become more realistic with smaller horizontal grid spacing, such that the radii of maximum wind (RMW) become smaller, and the maximum vertical velocities occur off the center. However, the RMWs are still too large, especially at higher intensities, and there are rising motions occurring at the storm centers, inconsistently with observations. The distributions of precipitation, moisture, and radiative and surface turbulent heat fluxes around TCs are diverse, even across models with similar horizontal resolutions. At the same horizontal resolution, models that produce greater rainfall in the inner-core regions tend to simulate stronger TCs. When TCs are weak, the radial gradient of net column radiative flux convergence is comparable to that of surface turbulent heat fluxes, emphasizing the importance of cloud–radiative feedbacks during the early developmental phases of TCs.en_US
dc.format.extent1575 - 1595en_US
dc.language.isoen_USen_US
dc.relation.ispartofJournal of Climateen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleAzimuthally Averaged Wind and Thermodynamic Structures of Tropical Cyclones in Global Climate Models and Their Sensitivity to Horizontal Resolutionen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1175/JCLI-D-19-0172.1-
dc.date.eissued2020-01-01en_US
dc.identifier.eissn1520-0442-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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