Concentric Eyewall Asymmetries in Hurricane Gonzalo (2014) Observed by Airborne Radar

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dc.contributor.authorDidlake, Anthony C. Jr.
dc.contributor.authorHeymsfield, Gerald M.
dc.contributor.authorReasor, Paul D.
dc.contributor.authorGuimond, Stephen
dc.date.accessioned2022-03-08T18:17:37Z
dc.date.available2022-03-08T18:17:37Z
dc.date.issued2017-03-01
dc.description.abstractTwo eyewall replacement cycles were observed in Hurricane Gonzalo by the NOAA P3 Tail (TA) radar and the recently developed NASA High-Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP) radar. These observations captured detailed precipitation and kinematic features of Gonzalo’s concentric eyewalls both before and after the outer eyewall’s winds became the vortex maximum winds. The data were analyzed relative to the deep-layer environmental wind shear vector. During the beginning eyewall replacement cycle stages, the inner and outer eyewalls exhibited different asymmetries. The inner eyewall asymmetry exhibited significant low-level inflow, updrafts, and positive tangential acceleration in the downshear quadrants, consistent with observational and theoretical studies. The outer eyewall asymmetry exhibited these features in the left-of-shear quadrants, further downwind from those of the inner eyewall. It is suggested that the low-level inflow occurring at the outer but not at the inner eyewall in the downwind regions signals a barrier effect that contributes to the eventual decay of the inner eyewall. Toward the later eyewall replacement stages, the outer eyewall asymmetry shifts upwind, becoming more aligned with the asymmetry of the earlier inner eyewall. This upwind shift is consistent with the structural evolution of eyewall replacement as the outer eyewall transitions into the primary eyewall of the storm.en_US
dc.description.sponsorshipWe thank John Gamache for his tremendous efforts in developing and maintaining the Doppler Tail radar analysis dataset at HRD. We also thank Lihua Li and Matthew McLinden for their engineering support and data processing for the HIWRAP radar. We thank Beth Tully for her work on the summarizing conceptual model. Last, we thank the three anonymous reviewers whose comments led to significant improvements in the manuscript. The HS3 project was funded under NASA’s Earth Venture Program. The TCI project was funded by the Office of Naval Research. This research was supported by the NASA Postdoctoral Program and the NASA New Investigator Program (NIP) under Grant NNX16AI21G.en_US
dc.description.urihttps://journals.ametsoc.org/view/journals/mwre/145/3/mwr-d-16-0175.1.xmlen_US
dc.format.extent21 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2vhqt-wswd
dc.identifier.citationDidlake, Anthony C., Jr., Gerald M. Heymsfield, Paul D. Reasor, and Stephen R. Guimond. " Concentric Eyewall Asymmetries in Hurricane Gonzalo (2014) Observed by Airborne Radar", Monthly Weather Review 145, 3 (2017): 729-749, accessed Feb 13, 2022, https://doi.org/10.1175/MWR-D-16-0175.1en_US
dc.identifier.urihttps://doi.org/10.1175/MWR-D-16-0175.1
dc.identifier.urihttp://hdl.handle.net/11603/24368
dc.language.isoen_USen_US
dc.publisherAMSen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Physics Department
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleConcentric Eyewall Asymmetries in Hurricane Gonzalo (2014) Observed by Airborne Radaren_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-7185-5629en_US

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