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|a 10.1029/2020JD033842
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|a eng
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|a Zhang, Feimin
|e verfasserin
|4 aut
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|a Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm
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|c 2021
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 30.03.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020. University of Utah.
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|a After a tropical storm makes landfall, its vortex interacts with the surrounding environment and the underlying surface. It is expected that diurnal variation over land will affect storm structures. However, this has not yet been explored in previous studies. In this paper, numerical simulation of postlandfall Tropical Storm Bill (2015) is conducted using a research version of the NCEP Hurricane Weather Research and Forecasting (HWRF) model. Results indicate that during the storm's interaction with midlatitude westerlies over the Great Plains, the simulated storm with the SLAB land-surface scheme is stronger, with faster eastward movement and attenuation, and more asymmetric structures than that with the NOAH land-surface scheme. More symmetric structures correspond with a slower weakening and slower eastward movement of the storm over land. Further diagnoses suggest an obvious response of the storm's asymmetric structures to diurnal effects over land. Surface diabatic heating in the storm environment is important for the storm's symmetric structures and intensity over land. Specifically, during the transition from nighttime to daytime, the evident strengthening of convective instability, atmospheric baroclinicity, and the lateral advection of high θ e air in the storm environment, associated with the rapid increase in surface diabatic heating, are conducive to the development of vertical vorticity and storm-relative helicity, thus contributing to the maintenance of the storm's symmetric structures and intensity after landfall
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|a Journal Article
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|a Pu, Zhaoxia
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Chenghai
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of geophysical research. Atmospheres : JGR
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|g 126(2021), 1 vom: 16. Jan., Seite 2020JD033842
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|g volume:126
|g year:2021
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|g day:16
|g month:01
|g pages:2020JD033842
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|u http://dx.doi.org/10.1029/2020JD033842
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