{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T12:30:40Z","timestamp":1762432240972,"version":"build-2065373602"},"reference-count":26,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2022,10,22]],"date-time":"2022-10-22T00:00:00Z","timestamp":1666396800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Tornadoes are one of the most severe meteorological phenomena on the earth and their high winds cause serious damage to society. It is well known that vortices (mesocyclone or misocyclone, depending on their scale) in convective clouds contribute to tornadogenesis. High temporal resolution radar observations are necessary to elucidate the mechanism of tornadogenesis because convective clouds change drastically over time. This study focused on waterspouts that occurred on 15 May 2017 near Okinawa, Japan. Using Phased Array Weather Radar (PAWR) data, which provide three-dimensional data with high temporal resolution (every 30 s), radar reflectivity factors and Doppler velocity data were used to detect the three-dimensional structure of vortices. Using PAWR data, vorticities and diameters of these misocyclones were detected every 30 s and their potential vorticities, which are only possible because of the three-dimensional observation by PAWR, were calculated to understand the vortex generation and advection. The structures of two misocyclones (MC1 and MC2) were detected from Doppler velocity patterns. Combined with the radar reflectivity analysis, MC2 can be divided into two misocyclones (MC2a and MC2b). Potential vorticity of MC1 increased with time, probably because an outflow from the strong echo enhanced the lower horizontal shear. Potential vorticities in MC2a and MC2b were conserved in each period, with MC2b being nearly twice as large as MC2a.<\/jats:p>","DOI":"10.3390\/rs14215293","type":"journal-article","created":{"date-parts":[[2022,10,24]],"date-time":"2022-10-24T10:09:23Z","timestamp":1666606163000},"page":"5293","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Analysis of the Three-Dimensional Structure of the Misocyclones Generating Waterspouts Observed by Phased Array Weather Radar: Case Study on 15 May 2017 in Okinawa Prefecture, Japan"],"prefix":"10.3390","volume":"14","author":[{"given":"Ryusho","family":"Imai","sequence":"first","affiliation":[{"name":"Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1984-0144","authenticated-orcid":false,"given":"Nobuhiro","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,22]]},"reference":[{"key":"ref_1","unstructured":"American Meteorological Society (2021, December 01). 2021: Tornado. Glossary of Meteorology. Available online: http:\/\/glossary.ametsoc.org\/wiki\/Tornado."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Bluestein, H.B. (2013). Severe Convective Storms and Tornadoes, Springer.","DOI":"10.1007\/978-3-642-05381-8"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1511","DOI":"10.1175\/1520-0469(1981)038<1511:TADITC>2.0.CO;2","article-title":"Tornadoes and downbursts in the context of generalized planetary scales","volume":"38","author":"Fujita","year":"1981","journal-title":"J. Atmos. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1016\/j.atmosres.2008.09.015","article-title":"Tornadogenesis: Our current understanding, forecasting considerations, and questions to guide future research","volume":"93","author":"Markowski","year":"2009","journal-title":"Atmos. Res."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"676","DOI":"10.1175\/1520-0450(1974)013<0676:TLCOFK>2.0.CO;2","article-title":"The life cycle of Florida Keys\u2019 waterspouts. I","volume":"13","author":"Golden","year":"1974","journal-title":"J. Appl. Meteor."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"231","DOI":"10.1175\/1520-0450(1977)016<0231:AAOWFA>2.0.CO;2","article-title":"Scale-interaction implications for the waterspout life cycle. II","volume":"16","author":"Golden","year":"1974","journal-title":"J. Appl. Meteor."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1175\/1520-0469(1986)043<0753:OAMOGW>2.0.CO;2","article-title":"Observations and mechanisms of GATE waterspouts","volume":"43","author":"Simpson","year":"1986","journal-title":"J. Atmos. Sci."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1113","DOI":"10.1175\/1520-0493(1989)117<1113:NST>2.0.CO;2","article-title":"Non-supercell tornadoes","volume":"117","author":"Wakimoto","year":"1989","journal-title":"Mon. Weather Rev."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2387","DOI":"10.1175\/1520-0469(1997)054<2387:TNSONT>2.0.CO;2","article-title":"The numerical simulation of nonsupercell tornadogenesis. Part II: Evolution of a family of tornadoes along a weak outflow boundary","volume":"54","author":"Lee","year":"1997","journal-title":"J. Atmos. Sci."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"127","DOI":"10.2151\/sola.2014-026","article-title":"Detection of \u201cinvisible waterspout\u201d using 3D scanning Doppler lidar","volume":"10","author":"Fujiwara","year":"2014","journal-title":"SOLA"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"412","DOI":"10.1175\/1520-0434(1993)008<0412:OOAFWD>2.0.CO;2","article-title":"Observations of a Florida waterspout during CaPE","volume":"8","author":"Wakimoto","year":"1993","journal-title":"Weather Forecast."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1","DOI":"10.2151\/sola.2008-001","article-title":"Structure of a waterspout occurred over Tokyo Bay on May 31, 2007","volume":"4","author":"Sugawara","year":"2008","journal-title":"SOLA"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"497","DOI":"10.2151\/jmsj.87.497","article-title":"Vertical structure of misocyclones along a narrow cold frontal rainband","volume":"87","author":"Sugawara","year":"2009","journal-title":"J. Meteor. Soc. Jpn."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"153","DOI":"10.2151\/sola.2013-034","article-title":"A case study of the merging of two misocyclones in the TOMACS field campaign area of Tokyo on 26 August 2011","volume":"9","author":"Saito","year":"2013","journal-title":"SOLA"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1175\/WAF-D-14-00114.1","article-title":"Polarimetric radar observations from a waterspout-producing thunderstorm","volume":"30","year":"2015","journal-title":"Weather. Forecast."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1502","DOI":"10.1175\/1520-0426(1997)014<1502:DADOAP>2.0.CO;2","article-title":"Design and Deployment of a Portable, Pencil-Beam, Pulsed, 3-cm Doppler Radar","volume":"14","author":"Wurman","year":"1997","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1016\/j.atmosres.2014.10.001","article-title":"Review of recent progress in lightning and thunderstorm detection techniques in Asia","volume":"154","author":"Ushio","year":"2014","journal-title":"Atmos. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"314","DOI":"10.2151\/sola.2016-061","article-title":"Rapid volumetric growth of misocyclone and vault-like structure in horizontal shear observed by phased array weather radar","volume":"12","author":"Adachi","year":"2016","journal-title":"SOLA"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"661","DOI":"10.1175\/1520-0450(1970)009<0661:VSRBAD>2.0.CO;2","article-title":"Vortex signature recognition by a Doppler radar","volume":"9","author":"Donaldson","year":"1970","journal-title":"J. Appl. Meteor."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1868","DOI":"10.1175\/1520-0493(2000)128<1868:TPMSAW>2.0.CO;2","article-title":"Tornado-producing mini supercells associated with Typhoon 9019","volume":"128","author":"Suzuki","year":"2000","journal-title":"Mon. Weather Rev."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"880","DOI":"10.2151\/jmsj1965.62.6_880","article-title":"Characteristics of Baiu Front as a Predominant Subtropical Front in the Summer Northern Hemisphere","volume":"62","author":"Ninomiya","year":"1984","journal-title":"J. Meteorol. Soc. Japan. Ser. II"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1999","DOI":"10.1002\/qj.3803","article-title":"The ERA5 global reanalysis","volume":"146","author":"Hersbach","year":"2020","journal-title":"Q. J. R. Meteorol. Soc."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Markowski, P.M., and Richardson, Y.P. (2010). Mesoscale Meteorology in Midlatitudes, Wiley.","DOI":"10.1002\/9780470682104"},{"key":"ref_24","first-page":"230","article-title":"A preliminary investigation of the importance of helicity \u2018location\u2019 in the hodograph. Preprints of 19th Conf. on Severe Local Storms","volume":"230","author":"Markowski","year":"1998","journal-title":"Amer. Meteor. Soc."},{"key":"ref_25","first-page":"588","article-title":"Test of helicity as a tornado forecast parameter. Preprints of 16th Conf. on Severe Local Storms","volume":"588592","author":"Burgess","year":"1990","journal-title":"Amer. Meteor. Soc."},{"key":"ref_26","first-page":"7","article-title":"The Environment and Potential Predictability of Tornadoes Occurred in Japan","volume":"55","author":"Sakurai","year":"2008","journal-title":"Tenki"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/21\/5293\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:01:05Z","timestamp":1760144465000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/21\/5293"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,10,22]]},"references-count":26,"journal-issue":{"issue":"21","published-online":{"date-parts":[[2022,11]]}},"alternative-id":["rs14215293"],"URL":"https:\/\/doi.org\/10.3390\/rs14215293","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2022,10,22]]}}}