{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:05:12Z","timestamp":1760148312794,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,4,20]],"date-time":"2023-04-20T00:00:00Z","timestamp":1681948800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["42122036","42230607","41750965","2019QZKK0105"],"award-info":[{"award-number":["42122036","42230607","41750965","2019QZKK0105"]}]},{"name":"Second Tibetan Plateau Scientific Expedition and Research (STEP) program","award":["42122036","42230607","41750965","2019QZKK0105"],"award-info":[{"award-number":["42122036","42230607","41750965","2019QZKK0105"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Based on Doppler radar observation and reanalysis data, the statistical characteristics of mesovortices (MVs) during the first rainy season (April\u2013June) in Guangdong, South China, from 2017 to 2019 are studied, including their spatiotemporal distributions, structural features and favorable environmental conditions. The results show that the MVs usually exhibit short lifetimes; about 70% last for less than 30 min. The intensity and horizontal scale of the MVs are proportional to their lifetime. Long-lived MVs have larger horizontal scales and stronger intensities than short-lived ones. The MVs are mainly observed over the Pearl River Delta region, followed by western Guangdong Province, but relatively fewer in both eastern and northern Guangdong Province. The uneven spatial distribution of the MVs is closely related to the differences in the topographical features and the environment conditions over South China. MVs are prone to form over flat regions. The Pearl River Delta and eastern Guangdong regions are relatively flat compared to the more mountainous western and northern Guangdong regions. Moreover, the monsoonal south-westerlies, water vapor flux, atmospheric instability and vertical wind shear over southwest Guangdong are significantly larger than those in other regions and are favorable for the formation of MVs. The occurrence frequencies of MVs in central and southern parts of Guangdong display similar diurnal variations, reaching the peak during the late afternoon and early evening while dropping to the minimum overnight. However, the situation is opposite in northern Guangdong, with the peak overnight and the minimum during the late afternoon and early evening. The regional differences in diurnal variation are likely related to the moving direction of mesoscale convective systems (MCSs) in Guangdong.<\/jats:p>","DOI":"10.3390\/rs15082176","type":"journal-article","created":{"date-parts":[[2023,4,20]],"date-time":"2023-04-20T05:35:46Z","timestamp":1681968946000},"page":"2176","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Statistical Analysis of Mesovortices during the First Rainy Season in Guangdong, South China"],"prefix":"10.3390","volume":"15","author":[{"given":"Ying","family":"Tang","sequence":"first","affiliation":[{"name":"Nanjing Marine Radar Institute, Nanjing 210023, China"},{"name":"Key Laboratory of Mesoscale Severe Weather, Ministry of Education, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4495-3677","authenticated-orcid":false,"given":"Xin","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Mesoscale Severe Weather, Ministry of Education, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China"},{"name":"Key Laboratory of Radar Meteorology, China Meteorology Administration, Nanjing 210023, China"}]},{"given":"Yuanyuan","family":"Ju","sequence":"additional","affiliation":[{"name":"Key Laboratory of Mesoscale Severe Weather, Ministry of Education, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China"},{"name":"Key Laboratory of Radar Meteorology, China Meteorology Administration, Nanjing 210023, China"}]},{"given":"Zhenyu","family":"Wu","sequence":"additional","affiliation":[{"name":"Nanjing Marine Radar Institute, Nanjing 210023, China"}]},{"given":"Shushi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric Sciences, Nanjing 210023, China"}]},{"given":"Xunlai","family":"Chen","sequence":"additional","affiliation":[{"name":"Shenzhen Meteorology Bureau, Shenzhen 518040, China"}]},{"given":"Qi","family":"Xu","sequence":"additional","affiliation":[{"name":"Jiangsu Air Traffic Management Branch Bureau of Civil Aviation Administration of China, Nanjing 211113, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,20]]},"reference":[{"key":"ref_1","first-page":"156","article-title":"Characteristic analyses on environmental parameters in short-term severe convective weather in China","volume":"32","author":"Fan","year":"2013","journal-title":"Plateau. Meteorol."},{"key":"ref_2","first-page":"199","article-title":"Climatological characteristics of meso-scale and micro-scale strong convective weather events in China","volume":"24","author":"Xue","year":"2019","journal-title":"Clim. Environ. Res."},{"key":"ref_3","first-page":"145","article-title":"Mechanism analysis of a squall line upscale growing process in South China","volume":"40","author":"Wang","year":"2021","journal-title":"Plateau. Meteorol."},{"key":"ref_4","first-page":"135","article-title":"Analysis of radar echo characteristics of rare force 10 gale with a strong squall line event in Jiangxi","volume":"38","author":"Zhang","year":"2019","journal-title":"Torrential Rain Disasters"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"3871","DOI":"10.1175\/MWR-D-20-0090.1","article-title":"Convection initiation and growth at the coast of South China. Part II: Effects of the terrain, coastline, and cold pools","volume":"148","author":"Du","year":"2020","journal-title":"Mon. Weather Rev."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"9256","DOI":"10.1029\/2018JD028418","article-title":"An extreme rainfall event in coastal South China during SCMREX-2014: Formation and roles of rainband and echo trainings","volume":"123","author":"Liu","year":"2018","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1175\/JAMC-D-19-0081.1","article-title":"Image processing of radar mosaics for the climatology of convection initiation in South China","volume":"59","author":"Bai","year":"2020","journal-title":"J. Appl. Meteorol. Climatol."},{"key":"ref_8","first-page":"311","article-title":"The advances in the nowcasting techniques on thunderstorms and severe convection","volume":"70","author":"Yu","year":"2012","journal-title":"Acta Meteorol. Sin."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1175\/WAF-835.1","article-title":"Tornadoes from squall lines and bow echoes. Part I: Climatological distribution","volume":"20","author":"Trapp","year":"2005","journal-title":"Weather. Forecast."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2813","DOI":"10.1175\/MWR3216.1","article-title":"High winds generated by bow echoes. Part II: The relationship between the mesovortices and damaging straight-line winds","volume":"134","author":"Wakimoto","year":"2006","journal-title":"Mon. Weather Rev."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1497","DOI":"10.1175\/2008MWR2649.1","article-title":"Bow echo mesovortices. Part I: Processes that influence their damaging potential","volume":"137","author":"Atkins","year":"2009","journal-title":"Mon. Weather Rev."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1963","DOI":"10.1175\/JAS-D-14-0209.1","article-title":"The genesis of mesovortices within a real-data simulation of a bow echo system","volume":"72","author":"Xu","year":"2015","journal-title":"J. Atmos. Sci."},{"key":"ref_13","unstructured":"Burgess, D.W., Donaldson, R.J., and Desrochers, P.R. (1993). The Tornado: Its Structure, Dynamics, Prediction, and Hazards, American Geophysical Union."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"976","DOI":"10.1175\/1520-0434(1999)014<0976:SRAMEA>2.0.CO;2","article-title":"Storm reflectivity and mesocyclone evolution associated with the 15 April 1994 squall line over Kentucky and Southern Indiana","volume":"14","author":"Funk","year":"1999","journal-title":"Weather Forecast."},{"key":"ref_15","first-page":"914","article-title":"The detection of a severe tornado event in Anhui with China new generation weather radar","volume":"25","author":"Yu","year":"2006","journal-title":"Plateau. Meteorol."},{"key":"ref_16","first-page":"47","article-title":"The accuracy statistics of mesocyclone identification products from CINRAD\/SA","volume":"36","author":"Feng","year":"2010","journal-title":"Meteorol. Mon."},{"key":"ref_17","first-page":"16","article-title":"The analysis of mesocyclone product from the doppler weather radar","volume":"33","author":"Fang","year":"2007","journal-title":"Meteorol. Mon."},{"key":"ref_18","first-page":"1305","article-title":"Characteristics of the thunderstorm gale process in Hunan and Guangdong on 20 March 2013","volume":"41","author":"Fang","year":"2015","journal-title":"Meteorol. Mon."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"104768","DOI":"10.1016\/j.atmosres.2019.104768","article-title":"Characteristics of low-level meso-\u03b3-scale vortices in the warm season over East China","volume":"235","author":"Tang","year":"2020","journal-title":"Atmos. Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1007\/s007030170027","article-title":"The Advanced Regional Prediction System (ARPS)\u2014A multi-scale nonhydrostatic atmospheric simulation and prediction tool. Part II: Model physics and applications","volume":"76","author":"Xue","year":"2000","journal-title":"Meteor. Atmos. Phys."},{"key":"ref_21","unstructured":"Brewster, K., Hu, M., Xue, M., and Gao, J. (2005, January 6). Efficient assimilation of radar data at high resolution for short-range numerical weather prediction. Proceedings of the World Weather Research Program Symposium on Nowcasting and Very Short-range Forecasting, Toulouse, France."},{"key":"ref_22","first-page":"7","article-title":"ERA5 Reanalysis is in Production","volume":"147","author":"Hersbach","year":"2016","journal-title":"ECMWF Newsl."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"352","DOI":"10.1175\/1520-0434(1998)013<0352:TNSSLT>2.0.CO;2","article-title":"The national severe storms laboratory tornado detection algorithm","volume":"13","author":"Mitchell","year":"1998","journal-title":"Weather Forecast."},{"key":"ref_24","unstructured":"Smith, T.M., and Elmore, K.L. (2004, January 5). The use of radial velocity derivatives to diagnose rotation and divergence. Proceedings of the 11th Conf. on Aviation, Range, and Aerospace, Hyannis, MA, USA."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1175\/1520-0434(1998)013<0263:TSCIAT>2.0.CO;2","article-title":"The storm cell identification and tracking algorithm: An enhanced WSR-88D algorithm","volume":"13","author":"Johnson","year":"1998","journal-title":"Weather. Forecast."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"389","DOI":"10.1002\/qj.49712353807","article-title":"The global population of mesoscale convective complexes","volume":"123","author":"Laing","year":"1997","journal-title":"Q. J. R. Meteorol. Soc."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1175\/WAF-D-22-0115.1","article-title":"Environmental evolution of supercell thunderstorms interacting with the Appalachian Mountains","volume":"38","author":"Purpura","year":"2023","journal-title":"Weather. Forecast."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"104693","DOI":"10.1016\/j.atmosres.2019.104693","article-title":"Contrasting frontal and warm-sector heavy rainfalls over South China during the early-summer rainy season","volume":"235","author":"Wu","year":"2020","journal-title":"Atmos. Res."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2779","DOI":"10.1175\/1520-0493(2003)131<2779:LMWSLA>2.0.CO;2","article-title":"Low-level mesovortices within squall lines and bow echoes. Part I: Overview and dependence on environmental shear","volume":"131","author":"Weisman","year":"2003","journal-title":"Mon. Weather Rev."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1007\/s00376-022-2061-y","article-title":"On the Key Dynamical Processes Supporting the 21.7 Zhengzhou Record-breaking Hourly Rainfall in China","volume":"40","author":"Wei","year":"2023","journal-title":"Adv. Atmos. Sci."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1029\/2022JD037954","article-title":"A merger-formation bow echo caused by low-level mesovortex","volume":"128","author":"Liu","year":"2023","journal-title":"J. Geophy. Res. Atmos."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/15\/8\/2176\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:19:41Z","timestamp":1760123981000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/15\/8\/2176"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,4,20]]},"references-count":31,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2023,4]]}},"alternative-id":["rs15082176"],"URL":"https:\/\/doi.org\/10.3390\/rs15082176","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2023,4,20]]}}}