{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T16:24:01Z","timestamp":1761582241521,"version":"build-2065373602"},"reference-count":39,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,10]],"date-time":"2022-12-10T00:00:00Z","timestamp":1670630400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42274197","41722404"],"award-info":[{"award-number":["42274197","41722404"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>During heavy rain on 1\u20132 June 2015 in central China, the Wuhan mesosphere\u2013stratosphere\u2013troposphere (MST) radar was applied to record the atmospheric responses to the rain with a 30 min period. According to the vertical gradient of the echo power above 500 hPa, the tropopause height could be determined by MST radar detection. The tropopause descent was clearly observed by the Wuhan MST radar a few hours before the rain, and then the tropopause recovered to usual heights during the rain. The observation of the radiosonde in Wuhan was in line with that of the radar. Both the potential vorticity and the ozone mass mixing ratio variations at 100 hPa level implied the fall of the tropopause. During the tropopause decent, enhanced radar echoes appeared in the upper troposphere, the echo spectral widths became broader, and the large vertical wind velocities were recorded and indicated the occurrence of strong convective activities. The relative humidity was also found to increase at all tropospheric heights, including the region close to the tropopause. The convective flow may have transported water vapor to the tropopause heights, and a temperature decrease in this region was also recorded. It is very likely that water vapor cooling induced the tropopause descent.<\/jats:p>","DOI":"10.3390\/rs14246272","type":"journal-article","created":{"date-parts":[[2022,12,12]],"date-time":"2022-12-12T04:34:20Z","timestamp":1670819660000},"page":"6272","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Wuhan MST Radar Observations of a Tropopause Descent Event during Heavy Rain on 1\u20132 June 2015"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9815-9287","authenticated-orcid":false,"given":"Hao","family":"Qi","sequence":"first","affiliation":[{"name":"School of Information Engineering, Hubei University of Chinese Medicine, Wuhan 430065, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6690-4024","authenticated-orcid":false,"given":"Gang","family":"Chen","sequence":"additional","affiliation":[{"name":"Electronic Information School, Wuhan University, Wuhan 430072, China"}]},{"given":"Yiming","family":"Lin","sequence":"additional","affiliation":[{"name":"Electronic Information School, Wuhan University, Wuhan 430072, China"}]},{"given":"Wanlin","family":"Gong","sequence":"additional","affiliation":[{"name":"Electronic Information School, Wuhan University, Wuhan 430072, China"}]},{"given":"Feilong","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6329-1894","authenticated-orcid":false,"given":"Yaxian","family":"Li","sequence":"additional","affiliation":[{"name":"Electronic Information School, Wuhan University, Wuhan 430072, China"}]},{"given":"Xiaoming","family":"Zhou","sequence":"additional","affiliation":[{"name":"Electronic Information School, Wuhan University, Wuhan 430072, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1109\/TGE.1979.294655","article-title":"Atmospheric Measurements by VHF Pulsed Doppler Radar","volume":"17","author":"Green","year":"1979","journal-title":"IEEE Trans. Geosci. Electron."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"452","DOI":"10.1007\/BF01586464","article-title":"The MST radar technique: Potential for middle atmospheric studies","volume":"118","author":"Balsley","year":"1980","journal-title":"Pure Appl. Geophys."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"848","DOI":"10.1016\/j.jastp.2010.12.009","article-title":"A review of mesosphere-stratosphere-troposphere (MST) radar developments and studies, circa 1997\u20132008","volume":"73","author":"Hocking","year":"2011","journal-title":"J. Atmos. Sol. Terr. Phys."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"4513","DOI":"10.1109\/TGRS.2016.2543507","article-title":"MST Radars of Chinese Meridian Project: System Description and Atmospheric Wind Measurement","volume":"54","author":"Chen","year":"2016","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2689","DOI":"10.1109\/JSTARS.2021.3057610","article-title":"Design of the New MST Radar in Chinese Meridian Project","volume":"14","author":"Chen","year":"2021","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"3121","DOI":"10.5194\/acp-13-3121-2013","article-title":"High resolution VHF radar measurements of tropopause structure and variability at Davis, Antarctica (69\u00b0 S, 78\u00b0 E)","volume":"13","author":"Alexander","year":"2013","journal-title":"Atmos. Chem. Phys."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2541","DOI":"10.1029\/1999GL011269","article-title":"Variations in tropical tropopause observed with radiosondes in Indonesia","volume":"27","author":"Shimizu","year":"2000","journal-title":"Geophys. Res. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1823","DOI":"10.1175\/1520-0442(2001)014<1823:TCPTCD>2.0.CO;2","article-title":"Tropical Cold Point Tropopause Characteristics Derived from ECMWF Reanalyses and Soundings","volume":"14","author":"Zhou","year":"2001","journal-title":"J. Clim."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"7857","DOI":"10.1029\/2000JD900837","article-title":"Climatological characteristics of the tropical tropopause as revealed by radiosondes","volume":"106","author":"Seidel","year":"2001","journal-title":"J. Geophys. Res. Earth Surf."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"L09707","DOI":"10.1029\/2010GL042659","article-title":"Downward Arctic Oscillation signal associated with moderate weak stratospheric polar vortex and the cold December 2009","volume":"37","author":"Wang","year":"2010","journal-title":"Geophys. Res. Lett."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1175\/1520-0469(1974)031<0493:ROOWAT>2.0.CO;2","article-title":"Radar Observations of Winds and Turbulence in the Stratosphere and Mesosphere","volume":"31","author":"Woodman","year":"1974","journal-title":"J. Atmos. Sci."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"15509","DOI":"10.1029\/2000JD900155","article-title":"Interannual variability of the tropical tropopause derived from radiosonde data and NCEP reanalyses","volume":"105","author":"Randel","year":"2000","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1175\/1520-0493(1974)102<0029:QBALTF>2.0.CO;2","article-title":"Quasi-Biennial and Long-Term Fluctuations in Tropopause Pressure and Temperature, and the Relation to Stratospheric Water Vapor Content","volume":"102","author":"Angell","year":"2009","journal-title":"Mon. Weather Rev."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2094","DOI":"10.1029\/2003GL018072","article-title":"High time resolution determination of the tropical tropopause by the Equatorial Atmosphere Radar","volume":"30","author":"Yamamoto","year":"2003","journal-title":"Geophys. Res. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"RS6003","DOI":"10.1029\/2008RS003824","article-title":"Diurnal variability of the tropical tropopause: Significance of VHF radar measurements","volume":"43","author":"Das","year":"2008","journal-title":"Radio Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"D09113","DOI":"10.1029\/2007JD009014","article-title":"VHF radar echoes in the vicinity of tropopause during the passage of tropical cyclone: First observations from the Gadanki MST radar","volume":"113","author":"Das","year":"2008","journal-title":"J. Geophys. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"D14120","DOI":"10.1029\/2009JD012655","article-title":"Variability of the tropical tropopause over Indian monsoon region","volume":"115","author":"Mehta","year":"2010","journal-title":"J. Geophys. Res. Earth Surf."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1152","DOI":"10.1175\/1520-0469(1986)043<1152:STVOTT>2.0.CO;2","article-title":"Short-Term Variations of the Tropopause Height over the Winter MONEX Area","volume":"43","author":"Johnson","year":"1986","journal-title":"J. Atmos. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"455","DOI":"10.1007\/s12517-022-09755-3","article-title":"Role of stratospheric tropospheric exchange in influencing precipitation associated with western disturbances over North India during winter","volume":"15","author":"Neelakantan","year":"2022","journal-title":"Arab. J. Geosci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"382","DOI":"10.11728\/cjss2010.04.382","article-title":"Development of the Chinese meridian project","volume":"30","author":"Wang","year":"2010","journal-title":"Chin. J. Space Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"539","DOI":"10.11728\/cjss2022.04.yg09","article-title":"Construction Progress of Chinese Meridian Project Phase II","volume":"42","author":"Wang","year":"2022","journal-title":"Chin. J. Space Sci."},{"key":"ref_22","first-page":"41","article-title":"Mesosphere-Stratosphere-Troposphere radar dataset during 2012\u20132020 from Chongyang, Wuhan Station","volume":"6","author":"Gong","year":"2021","journal-title":"China Sci. Data"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"5697","DOI":"10.5194\/amt-13-5697-2020","article-title":"Wuhan MST radar: Technical features and validation of wind observations","volume":"13","author":"Qiao","year":"2020","journal-title":"Atmos. Meas. Tech."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1403","DOI":"10.5194\/angeo-36-1403-2018","article-title":"Strong downdrafts preceding rapid tropopause ascent and their potential to identify cross-tropopause stratospheric intrusions","volume":"36","author":"Chen","year":"2018","journal-title":"Ann. Geophys."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"631","DOI":"10.5194\/angeo-37-631-2019","article-title":"High-resolution Beijing mesosphere\u2013stratosphere\u2013troposphere (MST) radar detection of tropopause structure and variability over Xianghe (39.75\u00b0 N, 116.96\u00b0 E)","volume":"37","author":"Chen","year":"2019","journal-title":"China Ann. Geophys."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1238","DOI":"10.1126\/science.203.4386.1238","article-title":"Tropopause Detection by Partial Specular Reflection with Very-High-Frequency Radar","volume":"203","author":"Gage","year":"1979","journal-title":"Science"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"759","DOI":"10.3402\/tellusa.v47i5.11573","article-title":"Use of MST radars to probe the mesoscale structure of the tropopause","volume":"47","author":"Vaughan","year":"1995","journal-title":"Tellus A"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"679","DOI":"10.1016\/j.jastp.2014.09.008","article-title":"Detection of tropo-pause altitude using Indian MST radar data and comparison with simultaneous radiosonde observations","volume":"121","author":"Ravindrababu","year":"2014","journal-title":"J. Atmos. Sol.-Terr. Phys."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"e2020JD032776","DOI":"10.1029\/2020JD032776","article-title":"Statistical Study of the Midlatitude Mesospheric Vertical Winds Observed by the Wuhan and Beijing MST Radars in China","volume":"125","author":"Zhang","year":"2020","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1109\/LGRS.2009.2039340","article-title":"HF Radio-Frequency Interference Mitigation","volume":"7","author":"Chen","year":"2010","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1029\/RS015i002p00195","article-title":"A review of radar studies of the middle atmosphere","volume":"15","author":"Harper","year":"1980","journal-title":"Radio Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1175\/1520-0426(1987)004<0151:OOTRAD>2.0.CO;2","article-title":"Observations of Thunderstorm Reflectivities and Doppler Velocities Measured at VHF and UHF","volume":"4","author":"Larsen","year":"1987","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"622","DOI":"10.1029\/RS020i003p00622","article-title":"Simultaneous observation of precipitating atmosphere by VHF band and C\/Ku band radars","volume":"20","author":"Fukao","year":"1985","journal-title":"Radio Sci."},{"key":"ref_34","first-page":"226","article-title":"A study of a characteristic tpye of upper-level frontogenesis","volume":"12","author":"Reed","year":"1995","journal-title":"J. Atmos. Sci."},{"key":"ref_35","unstructured":"Wallace, J.M., and Hobbs, P.V. (2006). Atmospheric Science: An Introductory Survey, Academic Press."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"D10302","DOI":"10.1029\/2008JD011374","article-title":"Tropospheric intrusions associated with the secondary tropopause","volume":"114","author":"Pan","year":"2009","journal-title":"J. Geophys. Res."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"3687","DOI":"10.1002\/2015JD024052","article-title":"Frequency and impact of summertime stratospheric intrusions over Maryland during DISCOVER-AQ (2011): New evidence from NASA\u2019s GEOS-5 simulations","volume":"121","author":"Ott","year":"2016","journal-title":"J. Geophys. Res. Atmos."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"913","DOI":"10.5194\/acp-14-913-2014","article-title":"A global climatology of stratosphere\u2013troposphere exchange using the ERA-Interim data set from 1979 to 2011","volume":"14","author":"Sprenger","year":"2014","journal-title":"Atmos. Chem. Phys."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"12410","DOI":"10.1002\/2015JD023877","article-title":"Characterizing the lifetime and occurrence of stratospheric-tropospheric ex-change events in the rocky mountain region using high-resolution ozone measurements","volume":"120","author":"Sullivan","year":"2015","journal-title":"J. Geophys. Res. Atmos."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/24\/6272\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:37:59Z","timestamp":1760146679000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/14\/24\/6272"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,10]]},"references-count":39,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["rs14246272"],"URL":"https:\/\/doi.org\/10.3390\/rs14246272","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2022,12,10]]}}}