Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere

Due to the significant changes they bring to high latitude stratospheric temperature and wind, stratospheric sudden warmings (SSWs) can have an impact on the propagation and energy distribution of gravity waves (GWs). The variation characteristics of GWs during SSWs have always been an important iss...

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Main Authors: XuanYun Zeng, Guang Zhong
Format: Article
Language:English
Published: Science Press 2024-03-01
Series:Earth and Planetary Physics
Subjects:
Online Access:http://www.eppcgs.org/article/doi/10.26464/epp2024007?pageType=en
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author XuanYun Zeng
Guang Zhong
author_facet XuanYun Zeng
Guang Zhong
author_sort XuanYun Zeng
collection DOAJ
description Due to the significant changes they bring to high latitude stratospheric temperature and wind, stratospheric sudden warmings (SSWs) can have an impact on the propagation and energy distribution of gravity waves (GWs). The variation characteristics of GWs during SSWs have always been an important issue. Using temperature data from January to March in 2014−2016, provided by the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission, we have analyzed global GW activity at 15−40 km in the Northern Hemisphere during SSW events. During the SSWs that we studied, the stratospheric temperature rose in one or two longitudinal regions in the Northern Hemisphere; the areas affected extended to the east of 90°W. During these SSWs, the potential energy density (\begin{document}$ {E}_{p} $\end{document}) of GWs expanded and covered a larger range of longitude and altitude, exhibiting an eastward and downward extension. The \begin{document}$ {E}_{p} $\end{document} usually increased, while partially filtered by the eastward zonal winds. When zonal winds weakened or turned westward, \begin{document}$ {E}_{p} $\end{document} began to strengthen. After SSWs, the \begin{document}$ {E}_{p} $\end{document} usually decreased. These observations can serve as a reference for analyzing the interaction mechanism between SSWs and GWs in future work.
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spelling doaj.art-d70b6bb3c69843e7aaba36e3e810204a2024-03-06T05:52:30ZengScience PressEarth and Planetary Physics2096-39552024-03-018241542210.26464/epp2024007RA439-zengxuanyun-FAnalysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphereXuanYun Zeng0Guang Zhong1School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410000, ChinaSchool of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410000, ChinaDue to the significant changes they bring to high latitude stratospheric temperature and wind, stratospheric sudden warmings (SSWs) can have an impact on the propagation and energy distribution of gravity waves (GWs). The variation characteristics of GWs during SSWs have always been an important issue. Using temperature data from January to March in 2014−2016, provided by the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission, we have analyzed global GW activity at 15−40 km in the Northern Hemisphere during SSW events. During the SSWs that we studied, the stratospheric temperature rose in one or two longitudinal regions in the Northern Hemisphere; the areas affected extended to the east of 90°W. During these SSWs, the potential energy density (\begin{document}$ {E}_{p} $\end{document}) of GWs expanded and covered a larger range of longitude and altitude, exhibiting an eastward and downward extension. The \begin{document}$ {E}_{p} $\end{document} usually increased, while partially filtered by the eastward zonal winds. When zonal winds weakened or turned westward, \begin{document}$ {E}_{p} $\end{document} began to strengthen. After SSWs, the \begin{document}$ {E}_{p} $\end{document} usually decreased. These observations can serve as a reference for analyzing the interaction mechanism between SSWs and GWs in future work.http://www.eppcgs.org/article/doi/10.26464/epp2024007?pageType=enstratospheric sudden warminggravity wavewind filter
spellingShingle XuanYun Zeng
Guang Zhong
Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
Earth and Planetary Physics
stratospheric sudden warming
gravity wave
wind filter
title Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
title_full Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
title_fullStr Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
title_full_unstemmed Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
title_short Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
title_sort analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere
topic stratospheric sudden warming
gravity wave
wind filter
url http://www.eppcgs.org/article/doi/10.26464/epp2024007?pageType=en
work_keys_str_mv AT xuanyunzeng analysisofgravitywaveactivityduringstratosphericsuddenwarmingsinthenorthernhemisphere
AT guangzhong analysisofgravitywaveactivityduringstratosphericsuddenwarmingsinthenorthernhemisphere