首页|Gravity Wave Activity and Stratosphere-Troposphere Exchange During Typhoon Molave(2020)

Gravity Wave Activity and Stratosphere-Troposphere Exchange During Typhoon Molave(2020)

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To investigate the stratosphere-troposphere exchange(STE)process induced by the gravity waves(GWs)caused by Typhoon Molave(2020)in the upper troposphere and lower stratosphere,we analyzed the ERA5 reanalysis data provided by the European Centre for Medium-Range Weather Forecasts and the CMA Tropical Cyclone Best Track Dataset.We also adopted the mesoscale forecast model Weather Research and Forecasting model V4.3 for numerical simulation.Most of the previous studies were about typhoon-induced STE and typhoon-induced GWs,while our research focused on the STE caused by typhoon-induced gravity waves.Our analysis shows that most of the time,the gravity wave signal of Typhoon Molave appeared below the tropopause.It was stronger on the east side of the typhoon center(10°-20°N,110°-120°E)than on the west side,suggesting an eastward tilted structure with height increase.When the GWs in the upper troposphere and lower stratosphere region on the west side of the typhoon center broke up,it produced strong turbulence,resulting in stratosphere-troposphere exchange.At this time,the average potential vorticity vertical flux increased with the average ozone mass mixing ratio.The gravity wave events and STE process simulated by the WRF model were basically consistent with the results of ERA5 reanalysis data,but the time of gravity wave breaking was different.This study indicates that after the breaking of the GWs induced by typhoons,turbulent mixing will also be generated,and thus the STE.

gravity wavetyphoonstratosphere-troposphere exchangeSTEupper troposphere and lower stratosphereUTLS

黄栋、万凌峰、万贻顺、常舒捷、马欣、赵锴晶

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College of Ocean and Meteorology/South China Sea Institute of Marine Meteorology/Laboratory for Coastal Ocean Variation and Disaster Prediction/Key Laboratory of Climate,Resources and Environment in Continental Shelf Sea and Deep Sea(LCRE)/Key Laboratory of Space Ocean Remote Sensing and Application,Ministry of Natural Resources,Guangdong Ocean University,Zhanjiang,Guangdong 524088 China

Frontier Science Center for Deep Ocean Multispheres and Earth System(DOMES),Institute for Advanced Ocean Study(IAOS),Ocean University of China,Qingdao,Shandong 266100 China

School of Earth and Environment,University of Leeds,Leeds LS2 9JT UK

Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China

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Guangdong Basic and Applied Basic Research FoundationNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGuangdong Provincial Observation and Research Station for Tropical Ocean Environment in Western Coastal Waters(GSTOEW),First-ClaGuangdong Provincial Observation and Research Station for Tropical Ocean Environment in Western Coastal Waters(GSTOEW),First-ClaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesChina Scholarship CouncilNatural Science Foundation of Shanghai

2023A151501132342130604421306057229360408050303210123142000320236200120207201020220844022323ZR1473800

2024

10.3724/j.1006-8775.2024.026

热带气象学报(英文版)
中国气象局广州热带海洋气象研究所

热带气象学报(英文版)

影响因子：0.169
ISSN：1006-8775
年,卷(期)：2024.30(3)
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