The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence

Solar wind dynamic pressure pulses (DPPs) are small-scale plasma structures with abrupt and large-amplitude plasma dynamic pressure changes on timescales of seconds to several minutes. Overwhelming majority of DPP events (around 79.13%) reside in large-scale solar wind transients, i.e., coronal mass...

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Autores principales:	Mengsi Ruan, Pingbing Zuo, Zilu Zhou, Zhenning Shen, Yi Wang, Xueshang Feng, Chaowei Jiang, Xiaojun Xu, Jiayun Wei, Yanyan Xiong, Ludi Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	solar wind dynamic pressure pulse discontinuity turbulence intermittency data analysis Physics QC1-999
Acceso en línea:	https://doaj.org/article/4d4b53f5a0b0486492cc4618ea4b7159
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spelling	oai:doaj.org-article:4d4b53f5a0b0486492cc4618ea4b71592021-11-16T07:47:28ZThe Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence2296-424X10.3389/fphy.2021.750410https://doaj.org/article/4d4b53f5a0b0486492cc4618ea4b71592021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphy.2021.750410/fullhttps://doaj.org/toc/2296-424XSolar wind dynamic pressure pulses (DPPs) are small-scale plasma structures with abrupt and large-amplitude plasma dynamic pressure changes on timescales of seconds to several minutes. Overwhelming majority of DPP events (around 79.13%) reside in large-scale solar wind transients, i.e., coronal mass ejections, stream interaction regions, and complex ejecta. In this study, the intermittency, which is a typical feature of solar wind turbulence, is determined and compared during the time intervals in the undisturbed solar wind and in large-scale solar wind transients with clustered DPP events, respectively, as well as in the undisturbed solar wind without DPPs. The probability distribution functions (PDFs) of the fluctuations of proton density increments normalized to the standard deviation at different time lags in the three types of distinct regions are calculated. The PDFs in the undisturbed solar wind without DPPs are near-Gaussian distributions. However, the PDFs in the solar wind with clustered DPPs are obviously non-Gaussian distributions, and the intermittency is much stronger in the large-scale solar wind transients than that in the undisturbed solar wind. The major components of the DPPs are tangential discontinuities (TDs) and rotational discontinuities (RDs), which are suggested to be formed by compressive magnetohydrodynamic (MHD) turbulence. There are far more TD-type DPPs than RD-type DPPs both in the undisturbed solar wind and large-scale solar wind transients. The results imply that the formation of solar wind DPPs could be associated with solar wind turbulence, and much stronger intermittency may be responsible for the high occurrence rate of DPPs in the large-scale solar wind transients.Mengsi RuanPingbing ZuoZilu ZhouZhenning ShenYi WangXueshang FengChaowei JiangXiaojun XuJiayun WeiYanyan XiongLudi WangFrontiers Media S.A.articlesolar wind dynamic pressure pulsediscontinuityturbulenceintermittencydata analysisPhysicsQC1-999ENFrontiers in Physics, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	solar wind dynamic pressure pulse discontinuity turbulence intermittency data analysis Physics QC1-999
spellingShingle	solar wind dynamic pressure pulse discontinuity turbulence intermittency data analysis Physics QC1-999 Mengsi Ruan Pingbing Zuo Zilu Zhou Zhenning Shen Yi Wang Xueshang Feng Chaowei Jiang Xiaojun Xu Jiayun Wei Yanyan Xiong Ludi Wang The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
description	Solar wind dynamic pressure pulses (DPPs) are small-scale plasma structures with abrupt and large-amplitude plasma dynamic pressure changes on timescales of seconds to several minutes. Overwhelming majority of DPP events (around 79.13%) reside in large-scale solar wind transients, i.e., coronal mass ejections, stream interaction regions, and complex ejecta. In this study, the intermittency, which is a typical feature of solar wind turbulence, is determined and compared during the time intervals in the undisturbed solar wind and in large-scale solar wind transients with clustered DPP events, respectively, as well as in the undisturbed solar wind without DPPs. The probability distribution functions (PDFs) of the fluctuations of proton density increments normalized to the standard deviation at different time lags in the three types of distinct regions are calculated. The PDFs in the undisturbed solar wind without DPPs are near-Gaussian distributions. However, the PDFs in the solar wind with clustered DPPs are obviously non-Gaussian distributions, and the intermittency is much stronger in the large-scale solar wind transients than that in the undisturbed solar wind. The major components of the DPPs are tangential discontinuities (TDs) and rotational discontinuities (RDs), which are suggested to be formed by compressive magnetohydrodynamic (MHD) turbulence. There are far more TD-type DPPs than RD-type DPPs both in the undisturbed solar wind and large-scale solar wind transients. The results imply that the formation of solar wind DPPs could be associated with solar wind turbulence, and much stronger intermittency may be responsible for the high occurrence rate of DPPs in the large-scale solar wind transients.
format	article
author	Mengsi Ruan Pingbing Zuo Zilu Zhou Zhenning Shen Yi Wang Xueshang Feng Chaowei Jiang Xiaojun Xu Jiayun Wei Yanyan Xiong Ludi Wang
author_facet	Mengsi Ruan Pingbing Zuo Zilu Zhou Zhenning Shen Yi Wang Xueshang Feng Chaowei Jiang Xiaojun Xu Jiayun Wei Yanyan Xiong Ludi Wang
author_sort	Mengsi Ruan
title	The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
title_short	The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
title_full	The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
title_fullStr	The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
title_full_unstemmed	The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence
title_sort	relationship between solar wind dynamic pressure pulses and solar wind turbulence
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/4d4b53f5a0b0486492cc4618ea4b7159
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The Relationship Between Solar Wind Dynamic Pressure Pulses and Solar Wind Turbulence

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