Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China

An EF1 tornado associated with tropical cyclone (TC) Ewiniar hit Dali Town, Foshan, Guangdong Province at 06:03 UTC on June 8, 2018, and the first special tornado warning was issued to five towns at 05:05 UTC. This article utilizes minute-scale observations from an X-band dual-polarization radar and...

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Autores principales:	Zhaoming Li, Haonan Chen, Hongxing Chu, Haobo Tan, V. Chandrasekar, Xianxiang Huang, Shuofu Wang
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Polarimetric weather radar severe weather tornado warning Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/23ef94caf7714a50a8e5362bc4479ce9
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spelling	oai:doaj.org-article:23ef94caf7714a50a8e5362bc4479ce92021-11-24T00:00:17ZMultivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China2151-153510.1109/JSTARS.2021.3125269https://doaj.org/article/23ef94caf7714a50a8e5362bc4479ce92021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9601186/https://doaj.org/toc/2151-1535An EF1 tornado associated with tropical cyclone (TC) Ewiniar hit Dali Town, Foshan, Guangdong Province at 06:03 UTC on June 8, 2018, and the first special tornado warning was issued to five towns at 05:05 UTC. This article utilizes minute-scale observations from an X-band dual-polarization radar and measurements from an S-band Doppler radar to resolve the polarization characteristics associated with this tornado. In addition, second-scale atmospheric pressure data obtained from micropressure gauge and NCEP FNL (Final) Operational Global Analysis data are used to investigate the synoptic conditions and features of gravity waves (GWs). The conspicuous features of the descending reflectivity core, Doppler velocity couplet, <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc, <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot, and the separation of the <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc and <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot are detailed to quantify the tornadic evolution. The amplitude fluctuation of the GWs suddenly increased to 77.3 Pa, 2 h before the tornado occurred. Two focus regions with <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> values greater than 6<inline-formula><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/km are discussed by combining the Doppler velocity couplet and <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc. The separation distance of the <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc and <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot was approximately 2.1 km. The appearance of these features may be indicative of fundamental processes intrinsic to tornado storms.Zhaoming LiHaonan ChenHongxing ChuHaobo TanV. ChandrasekarXianxiang HuangShuofu WangIEEEarticlePolarimetric weather radarsevere weathertornado warningOcean engineeringTC1501-1800Geophysics. Cosmic physicsQC801-809ENIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11517-11529 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Polarimetric weather radar severe weather tornado warning Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
spellingShingle	Polarimetric weather radar severe weather tornado warning Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Zhaoming Li Haonan Chen Hongxing Chu Haobo Tan V. Chandrasekar Xianxiang Huang Shuofu Wang Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
description	An EF1 tornado associated with tropical cyclone (TC) Ewiniar hit Dali Town, Foshan, Guangdong Province at 06:03 UTC on June 8, 2018, and the first special tornado warning was issued to five towns at 05:05 UTC. This article utilizes minute-scale observations from an X-band dual-polarization radar and measurements from an S-band Doppler radar to resolve the polarization characteristics associated with this tornado. In addition, second-scale atmospheric pressure data obtained from micropressure gauge and NCEP FNL (Final) Operational Global Analysis data are used to investigate the synoptic conditions and features of gravity waves (GWs). The conspicuous features of the descending reflectivity core, Doppler velocity couplet, <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc, <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot, and the separation of the <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc and <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot are detailed to quantify the tornadic evolution. The amplitude fluctuation of the GWs suddenly increased to 77.3 Pa, 2 h before the tornado occurred. Two focus regions with <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> values greater than 6<inline-formula><tex-math notation="LaTeX">$^\circ$</tex-math></inline-formula>/km are discussed by combining the Doppler velocity couplet and <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc. The separation distance of the <italic>Z</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DR}}$</tex-math></inline-formula> arc and <italic>K</italic><inline-formula><tex-math notation="LaTeX">$_{\text{DP}}$</tex-math></inline-formula> foot was approximately 2.1 km. The appearance of these features may be indicative of fundamental processes intrinsic to tornado storms.
format	article
author	Zhaoming Li Haonan Chen Hongxing Chu Haobo Tan V. Chandrasekar Xianxiang Huang Shuofu Wang
author_facet	Zhaoming Li Haonan Chen Hongxing Chu Haobo Tan V. Chandrasekar Xianxiang Huang Shuofu Wang
author_sort	Zhaoming Li
title	Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
title_short	Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
title_full	Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
title_fullStr	Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
title_full_unstemmed	Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China
title_sort	multivariate analysis and warning of a tornado embedded in tropical cyclone in southern china
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/23ef94caf7714a50a8e5362bc4479ce9
work_keys_str_mv	AT zhaomingli multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT haonanchen multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT hongxingchu multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT haobotan multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT vchandrasekar multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT xianxianghuang multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina AT shuofuwang multivariateanalysisandwarningofatornadoembeddedintropicalcycloneinsouthernchina
_version_	1718416082501369856

Multivariate Analysis and Warning of a Tornado Embedded in Tropical Cyclone in Southern China

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