Modulation of chorus intensity by ULF waves deep in the inner magnetosphere
Previous studies have shown that chorus wave intensity can be modulated by Pc4‐Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode sign...
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| Veröffentlicht in: | Geophysical research letters 2016-09, Vol.43 (18), p.9444-9452 |
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| creator | Xia, Zhiyang Chen, Lunjin Dai, Lei Claudepierre, Seth G. Chan, Anthony A. Soto‐Chavez, A. R. Reeves, G. D. |
| description | Previous studies have shown that chorus wave intensity can be modulated by Pc4‐Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f |
| doi_str_mv | 10.1002/2016GL070280 |
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| fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_1402618</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1911195135</sourcerecordid><originalsourceid>FETCH-LOGICAL-c5311-e594919abdec3b044bc8f27e1c1770befa50c5ef40944e228455f9c41be002793</originalsourceid><addsrcrecordid>eNqN0U1r3DAQBmBRGug26a0_QLSXHrLJjD4s61hCsi1xKJTmLGztuOvgtTaSnLD_Pmq3h5JDyGkEehjel2HsI8IZAohzAVitGjAganjDFmiVWtYA5i1bANjyFqZ6x96ndAcAEiQu2PVNWM9jm4cw8dBzvwlxTnyYMk1pyHve7fltc8Uf2wdKfE20K388b6iMiSLftr8nyiHtNhTphB317Zjow795zG6vLn9dfFs2P1bfL742S68l4pK0VRZt263Jyw6U6nzdC0Po0RjoqG81eE29KpEVCVErrXvrFXZUShorj9mnw96Q8uCSHzL5jQ8lkM8OFYgK64K-HNAuhvuZUnbbIXkax3aiMCeHtdayKtuqV1BppKoq1IV-fkbvwhyn0tahRUSrUb6samFVyfe3xulB-RhSitS7XRy2bdw7BPfnnu7_exYuDvxxGGn_onWrn41W1qB8AlJAnSY</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1829461879</pqid></control><display><type>article</type><title>Modulation of chorus intensity by ULF waves deep in the inner magnetosphere</title><source>Access via Wiley Online Library</source><source>Wiley-Blackwell AGU Digital Library</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Wiley Online Library (Open Access Collection)</source><creator>Xia, Zhiyang ; Chen, Lunjin ; Dai, Lei ; Claudepierre, Seth G. ; Chan, Anthony A. ; Soto‐Chavez, A. R. ; Reeves, G. D.</creator><creatorcontrib>Xia, Zhiyang ; Chen, Lunjin ; Dai, Lei ; Claudepierre, Seth G. ; Chan, Anthony A. ; Soto‐Chavez, A. R. ; Reeves, G. D. ; Rice Univ., Houston, TX (United States) ; Univ. of Texas, Dallas, TX (United States) ; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</creatorcontrib><description>Previous studies have shown that chorus wave intensity can be modulated by Pc4‐Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <∼ 0.3fce), but cannot account for the observed higher‐frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher‐frequency ranges require nonlinear mechanisms. In addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long.
Key Points
ULF wave modulation of pitch angle distributions of both electrons and protons and chorus intensity occurs deep in the magnetosphere
This ULF wave shows signatures of fundamental poloidal mode of field line resonance and mirror wave nature
Linear growth rate calculation supports instability below 0.3 fce, while observed chorus at higher frequency requires nonlinear mechanisms</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL070280</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>ASTRONOMY AND ASTROPHYSICS ; chorus modulation ; Chorus waves ; Frequency ranges ; Geophysics ; Growth rate ; inner magnetosphere ; Low frequency ; Magnetic fields ; Magnetosphere ; Magnetospheres ; Mathematical analysis ; Modulation ; Nonlinearity ; Pitch angle ; Probes ; Protons ; Radiation ; Sensors ; Signatures ; Storms ; ULF ; ULF wave ; ULF waves ; Waves ; whistler wave</subject><ispartof>Geophysical research letters, 2016-09, Vol.43 (18), p.9444-9452</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5311-e594919abdec3b044bc8f27e1c1770befa50c5ef40944e228455f9c41be002793</citedby><cites>FETCH-LOGICAL-c5311-e594919abdec3b044bc8f27e1c1770befa50c5ef40944e228455f9c41be002793</cites><orcidid>0000-0002-7985-8098 ; 0000000279858098</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2016GL070280$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016GL070280$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,315,782,786,887,1419,1435,11523,27933,27934,45583,45584,46418,46477,46842,46901</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1402618$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Xia, Zhiyang</creatorcontrib><creatorcontrib>Chen, Lunjin</creatorcontrib><creatorcontrib>Dai, Lei</creatorcontrib><creatorcontrib>Claudepierre, Seth G.</creatorcontrib><creatorcontrib>Chan, Anthony A.</creatorcontrib><creatorcontrib>Soto‐Chavez, A. R.</creatorcontrib><creatorcontrib>Reeves, G. D.</creatorcontrib><creatorcontrib>Rice Univ., Houston, TX (United States)</creatorcontrib><creatorcontrib>Univ. of Texas, Dallas, TX (United States)</creatorcontrib><creatorcontrib>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</creatorcontrib><title>Modulation of chorus intensity by ULF waves deep in the inner magnetosphere</title><title>Geophysical research letters</title><description>Previous studies have shown that chorus wave intensity can be modulated by Pc4‐Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <∼ 0.3fce), but cannot account for the observed higher‐frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher‐frequency ranges require nonlinear mechanisms. In addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long.
Key Points
ULF wave modulation of pitch angle distributions of both electrons and protons and chorus intensity occurs deep in the magnetosphere
This ULF wave shows signatures of fundamental poloidal mode of field line resonance and mirror wave nature
Linear growth rate calculation supports instability below 0.3 fce, while observed chorus at higher frequency requires nonlinear mechanisms</description><subject>ASTRONOMY AND ASTROPHYSICS</subject><subject>chorus modulation</subject><subject>Chorus waves</subject><subject>Frequency ranges</subject><subject>Geophysics</subject><subject>Growth rate</subject><subject>inner magnetosphere</subject><subject>Low frequency</subject><subject>Magnetic fields</subject><subject>Magnetosphere</subject><subject>Magnetospheres</subject><subject>Mathematical analysis</subject><subject>Modulation</subject><subject>Nonlinearity</subject><subject>Pitch angle</subject><subject>Probes</subject><subject>Protons</subject><subject>Radiation</subject><subject>Sensors</subject><subject>Signatures</subject><subject>Storms</subject><subject>ULF</subject><subject>ULF wave</subject><subject>ULF waves</subject><subject>Waves</subject><subject>whistler wave</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0U1r3DAQBmBRGug26a0_QLSXHrLJjD4s61hCsi1xKJTmLGztuOvgtTaSnLD_Pmq3h5JDyGkEehjel2HsI8IZAohzAVitGjAganjDFmiVWtYA5i1bANjyFqZ6x96ndAcAEiQu2PVNWM9jm4cw8dBzvwlxTnyYMk1pyHve7fltc8Uf2wdKfE20K388b6iMiSLftr8nyiHtNhTphB317Zjow795zG6vLn9dfFs2P1bfL742S68l4pK0VRZt263Jyw6U6nzdC0Po0RjoqG81eE29KpEVCVErrXvrFXZUShorj9mnw96Q8uCSHzL5jQ8lkM8OFYgK64K-HNAuhvuZUnbbIXkax3aiMCeHtdayKtuqV1BppKoq1IV-fkbvwhyn0tahRUSrUb6samFVyfe3xulB-RhSitS7XRy2bdw7BPfnnu7_exYuDvxxGGn_onWrn41W1qB8AlJAnSY</recordid><startdate>20160928</startdate><enddate>20160928</enddate><creator>Xia, Zhiyang</creator><creator>Chen, Lunjin</creator><creator>Dai, Lei</creator><creator>Claudepierre, Seth G.</creator><creator>Chan, Anthony A.</creator><creator>Soto‐Chavez, A. R.</creator><creator>Reeves, G. D.</creator><general>John Wiley & Sons, Inc</general><general>American Geophysical Union</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-7985-8098</orcidid><orcidid>https://orcid.org/0000000279858098</orcidid></search><sort><creationdate>20160928</creationdate><title>Modulation of chorus intensity by ULF waves deep in the inner magnetosphere</title><author>Xia, Zhiyang ; Chen, Lunjin ; Dai, Lei ; Claudepierre, Seth G. ; Chan, Anthony A. ; Soto‐Chavez, A. R. ; Reeves, G. D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5311-e594919abdec3b044bc8f27e1c1770befa50c5ef40944e228455f9c41be002793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>ASTRONOMY AND ASTROPHYSICS</topic><topic>chorus modulation</topic><topic>Chorus waves</topic><topic>Frequency ranges</topic><topic>Geophysics</topic><topic>Growth rate</topic><topic>inner magnetosphere</topic><topic>Low frequency</topic><topic>Magnetic fields</topic><topic>Magnetosphere</topic><topic>Magnetospheres</topic><topic>Mathematical analysis</topic><topic>Modulation</topic><topic>Nonlinearity</topic><topic>Pitch angle</topic><topic>Probes</topic><topic>Protons</topic><topic>Radiation</topic><topic>Sensors</topic><topic>Signatures</topic><topic>Storms</topic><topic>ULF</topic><topic>ULF wave</topic><topic>ULF waves</topic><topic>Waves</topic><topic>whistler wave</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xia, Zhiyang</creatorcontrib><creatorcontrib>Chen, Lunjin</creatorcontrib><creatorcontrib>Dai, Lei</creatorcontrib><creatorcontrib>Claudepierre, Seth G.</creatorcontrib><creatorcontrib>Chan, Anthony A.</creatorcontrib><creatorcontrib>Soto‐Chavez, A. R.</creatorcontrib><creatorcontrib>Reeves, G. D.</creatorcontrib><creatorcontrib>Rice Univ., Houston, TX (United States)</creatorcontrib><creatorcontrib>Univ. of Texas, Dallas, TX (United States)</creatorcontrib><creatorcontrib>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xia, Zhiyang</au><au>Chen, Lunjin</au><au>Dai, Lei</au><au>Claudepierre, Seth G.</au><au>Chan, Anthony A.</au><au>Soto‐Chavez, A. R.</au><au>Reeves, G. D.</au><aucorp>Rice Univ., Houston, TX (United States)</aucorp><aucorp>Univ. of Texas, Dallas, TX (United States)</aucorp><aucorp>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Modulation of chorus intensity by ULF waves deep in the inner magnetosphere</atitle><jtitle>Geophysical research letters</jtitle><date>2016-09-28</date><risdate>2016</risdate><volume>43</volume><issue>18</issue><spage>9444</spage><epage>9452</epage><pages>9444-9452</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>Previous studies have shown that chorus wave intensity can be modulated by Pc4‐Pc5 compressional ULF waves. In this study, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <∼ 0.3fce), but cannot account for the observed higher‐frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher‐frequency ranges require nonlinear mechanisms. In addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long.
Key Points
ULF wave modulation of pitch angle distributions of both electrons and protons and chorus intensity occurs deep in the magnetosphere
This ULF wave shows signatures of fundamental poloidal mode of field line resonance and mirror wave nature
Linear growth rate calculation supports instability below 0.3 fce, while observed chorus at higher frequency requires nonlinear mechanisms</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL070280</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-7985-8098</orcidid><orcidid>https://orcid.org/0000000279858098</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | ASTRONOMY AND ASTROPHYSICS chorus modulation Chorus waves Frequency ranges Geophysics Growth rate inner magnetosphere Low frequency Magnetic fields Magnetosphere Magnetospheres Mathematical analysis Modulation Nonlinearity Pitch angle Probes Protons Radiation Sensors Signatures Storms ULF ULF wave ULF waves Waves whistler wave |
| title | Modulation of chorus intensity by ULF waves deep in the inner magnetosphere |
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