A comparison of small‐scale magnetic fluctuations in the Region 1 and 2 field‐aligned current systems
By determining the location and size of the Region 1 (R1) and Region 2 (R2) large‐scale field‐aligned currents (FACs) from Active Magnetosphere and Planetary Electrodynamics Response Experiment data, we are able to study the small‐scale magnetic fluctuations observed by the Swarm satellites embedded...
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| Veröffentlicht in: | Journal of geophysical research. Biogeosciences 2017-03, Vol.122 (3), p.3277-3290 |
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| container_title | Journal of geophysical research. Biogeosciences |
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| creator | Wu, J. Bryant, M. S. Ridley, C. G. Shen, Y. Yang, L. Clausen, L. B. N. McWilliams, K. A. Murphy, K. R. Mann, I. R. Ozeke, L. G. Korth, H. Anderson, B. J. Waters, C. L. |
| description | By determining the location and size of the Region 1 (R1) and Region 2 (R2) large‐scale field‐aligned currents (FACs) from Active Magnetosphere and Planetary Electrodynamics Response Experiment data, we are able to study the small‐scale magnetic fluctuations observed by the Swarm satellites embedded within the large‐scale FACs. A statistical comparison of R1 and R2 high‐frequency fluctuations is presented in terms of different solar wind conditions and geomagnetic activities. We find that (1) the amplitude of high‐frequency fluctuations in both R1 and R2 increases as the large‐scale R1 and R2 FACs intensify; (2) high‐frequency fluctuations in R1 peak near dayside dawn and dusk, while those in R2 peak around noon; (3) the location of the largest high‐frequency fluctuations in R1 shifts in local time in response to IMF By, indicating a connection between the R1 fluctuation and the driving solar wind most likely explained by magnetic reconnection; and (4) high‐frequency fluctuations in R2 are enhanced in a small region near local noon and respond clearly to nightside drivers, as characterized by the auroral electrojet index. Our analysis shows that the intensity of R1 and R2 high‐frequency magnetic fluctuations is directly connected to the intensity of FACs, which implies that the magnetic fluctuations are closely related to the magnetospheric processes that drive them.
Key Points
We study the small‐scale magnetic fluctuations embedded within large‐scale FACs
We find the fluctuation intensity scales with large‐scale FAC density
The distribution of the fluctuations is controlled by magnetospheric activity |
| doi_str_mv | 10.1002/2016JA023453 |
| format | Article |
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Key Points
We study the small‐scale magnetic fluctuations embedded within large‐scale FACs
We find the fluctuation intensity scales with large‐scale FAC density
The distribution of the fluctuations is controlled by magnetospheric activity</description><identifier>ISSN: 2169-9380</identifier><identifier>ISSN: 2169-8953</identifier><identifier>EISSN: 2169-9402</identifier><identifier>EISSN: 2169-8961</identifier><identifier>DOI: 10.1002/2016JA023453</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Alignment ; Auroral electrojet ; Electrodynamics ; Electrojets ; Field‐aligned current ; Fluctuation ; Fluctuations ; geomagnetic activity ; Geomagnetism ; Joints ; Magnetic reconnection ; Magnetosphere ; Magnetospheres ; Noon ; reconnection ; Satellites ; Small scale ; Solar wind ; solar wind drivers ; Storms ; substorm</subject><ispartof>Journal of geophysical research. Biogeosciences, 2017-03, Vol.122 (3), p.3277-3290</ispartof><rights>2017. American Geophysical Union. All Rights Reserved.</rights><rights>info:eu-repo/semantics/openAccess</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4353-f53478e04feeb354045e817929e75a325e16ea53cb03a1899316edd95440fc4a3</citedby><cites>FETCH-LOGICAL-c4353-f53478e04feeb354045e817929e75a325e16ea53cb03a1899316edd95440fc4a3</cites><orcidid>0000-0002-2373-8708 ; 0000-0003-1969-5597 ; 0000-0002-4442-0678 ; 0000-0001-7394-7439 ; 0000-0003-2121-6962 ; 0000-0002-3063-6451 ; 0000-0003-2543-0149 ; 0000-0003-1004-7841 ; 0000-0003-0746-1646 ; 0000-0002-5917-7113 ; 0000-0001-7965-4346 ; 0000-0001-8544-4097</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%2F2016JA023453$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016JA023453$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1417,1433,26567,27924,27925,45574,45575,46409,46833</link.rule.ids></links><search><creatorcontrib>Wu, J.</creatorcontrib><creatorcontrib>Bryant, M. S.</creatorcontrib><creatorcontrib>Ridley, C. G.</creatorcontrib><creatorcontrib>Shen, Y.</creatorcontrib><creatorcontrib>Yang, L.</creatorcontrib><creatorcontrib>Clausen, L. B. N.</creatorcontrib><creatorcontrib>McWilliams, K. A.</creatorcontrib><creatorcontrib>Murphy, K. R.</creatorcontrib><creatorcontrib>Mann, I. R.</creatorcontrib><creatorcontrib>Ozeke, L. G.</creatorcontrib><creatorcontrib>Korth, H.</creatorcontrib><creatorcontrib>Anderson, B. J.</creatorcontrib><creatorcontrib>Waters, C. L.</creatorcontrib><title>A comparison of small‐scale magnetic fluctuations in the Region 1 and 2 field‐aligned current systems</title><title>Journal of geophysical research. Biogeosciences</title><description>By determining the location and size of the Region 1 (R1) and Region 2 (R2) large‐scale field‐aligned currents (FACs) from Active Magnetosphere and Planetary Electrodynamics Response Experiment data, we are able to study the small‐scale magnetic fluctuations observed by the Swarm satellites embedded within the large‐scale FACs. A statistical comparison of R1 and R2 high‐frequency fluctuations is presented in terms of different solar wind conditions and geomagnetic activities. We find that (1) the amplitude of high‐frequency fluctuations in both R1 and R2 increases as the large‐scale R1 and R2 FACs intensify; (2) high‐frequency fluctuations in R1 peak near dayside dawn and dusk, while those in R2 peak around noon; (3) the location of the largest high‐frequency fluctuations in R1 shifts in local time in response to IMF By, indicating a connection between the R1 fluctuation and the driving solar wind most likely explained by magnetic reconnection; and (4) high‐frequency fluctuations in R2 are enhanced in a small region near local noon and respond clearly to nightside drivers, as characterized by the auroral electrojet index. Our analysis shows that the intensity of R1 and R2 high‐frequency magnetic fluctuations is directly connected to the intensity of FACs, which implies that the magnetic fluctuations are closely related to the magnetospheric processes that drive them.
Key Points
We study the small‐scale magnetic fluctuations embedded within large‐scale FACs
We find the fluctuation intensity scales with large‐scale FAC density
The distribution of the fluctuations is controlled by magnetospheric activity</description><subject>Alignment</subject><subject>Auroral electrojet</subject><subject>Electrodynamics</subject><subject>Electrojets</subject><subject>Field‐aligned current</subject><subject>Fluctuation</subject><subject>Fluctuations</subject><subject>geomagnetic activity</subject><subject>Geomagnetism</subject><subject>Joints</subject><subject>Magnetic reconnection</subject><subject>Magnetosphere</subject><subject>Magnetospheres</subject><subject>Noon</subject><subject>reconnection</subject><subject>Satellites</subject><subject>Small scale</subject><subject>Solar wind</subject><subject>solar wind drivers</subject><subject>Storms</subject><subject>substorm</subject><issn>2169-9380</issn><issn>2169-8953</issn><issn>2169-9402</issn><issn>2169-8961</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>3HK</sourceid><recordid>eNqFkc9rFTEQxxexYKm9eTfgxYNPk0yymxwfRaulUCh6Dml2tqZkk2eyi7ybf4J_o39JR54F8WCHwGSGz3eYH133QvC3gnP5TnLRX2y5BKXhSXcsRW83VnH59OEPhj_rTlu742SGUkIfd3HLQpl3vsZWMisTa7NP6dePny34hGz2txmXGNiU1rCsfoklNxYzW74iu8ZbCplgPo9MsiliGknpUyTRyMJaK-aFtX1bcG7Pu6PJp4anf_xJ9-XD-89nHzeXV-efzraXm6BAw2bSoAaDXE2IN6AVVxqNGKy0OGgPUqPo0WsINxy8MNYCxeNotVJ8CsrDSffyUDfQTEvMLpfqneBGS9cDbYmI1wdiV8u3Fdvi5tgCpuQzlrU5YbmSUgKYx1FjhTEwDJzQV_-gd2WtmUalgkIOymjVE_XmobvSWsXJ7Wqcfd1Th-73Hd3fdyQcDvj3mHD_X9ZdnF9vSULvHn2rnHE</recordid><startdate>201703</startdate><enddate>201703</enddate><creator>Wu, J.</creator><creator>Bryant, M. S.</creator><creator>Ridley, C. G.</creator><creator>Shen, Y.</creator><creator>Yang, L.</creator><creator>Clausen, L. B. N.</creator><creator>McWilliams, K. A.</creator><creator>Murphy, K. R.</creator><creator>Mann, I. R.</creator><creator>Ozeke, L. G.</creator><creator>Korth, H.</creator><creator>Anderson, B. J.</creator><creator>Waters, C. L.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union (AGU)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>3HK</scope><orcidid>https://orcid.org/0000-0002-2373-8708</orcidid><orcidid>https://orcid.org/0000-0003-1969-5597</orcidid><orcidid>https://orcid.org/0000-0002-4442-0678</orcidid><orcidid>https://orcid.org/0000-0001-7394-7439</orcidid><orcidid>https://orcid.org/0000-0003-2121-6962</orcidid><orcidid>https://orcid.org/0000-0002-3063-6451</orcidid><orcidid>https://orcid.org/0000-0003-2543-0149</orcidid><orcidid>https://orcid.org/0000-0003-1004-7841</orcidid><orcidid>https://orcid.org/0000-0003-0746-1646</orcidid><orcidid>https://orcid.org/0000-0002-5917-7113</orcidid><orcidid>https://orcid.org/0000-0001-7965-4346</orcidid><orcidid>https://orcid.org/0000-0001-8544-4097</orcidid></search><sort><creationdate>201703</creationdate><title>A comparison of small‐scale magnetic fluctuations in the Region 1 and 2 field‐aligned current systems</title><author>Wu, J. ; Bryant, M. S. ; Ridley, C. G. ; Shen, Y. ; Yang, L. ; Clausen, L. B. N. ; McWilliams, K. A. ; Murphy, K. R. ; Mann, I. R. ; Ozeke, L. G. ; Korth, H. ; Anderson, B. J. ; Waters, C. L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4353-f53478e04feeb354045e817929e75a325e16ea53cb03a1899316edd95440fc4a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Alignment</topic><topic>Auroral electrojet</topic><topic>Electrodynamics</topic><topic>Electrojets</topic><topic>Field‐aligned current</topic><topic>Fluctuation</topic><topic>Fluctuations</topic><topic>geomagnetic activity</topic><topic>Geomagnetism</topic><topic>Joints</topic><topic>Magnetic reconnection</topic><topic>Magnetosphere</topic><topic>Magnetospheres</topic><topic>Noon</topic><topic>reconnection</topic><topic>Satellites</topic><topic>Small scale</topic><topic>Solar wind</topic><topic>solar wind drivers</topic><topic>Storms</topic><topic>substorm</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wu, J.</creatorcontrib><creatorcontrib>Bryant, M. S.</creatorcontrib><creatorcontrib>Ridley, C. G.</creatorcontrib><creatorcontrib>Shen, Y.</creatorcontrib><creatorcontrib>Yang, L.</creatorcontrib><creatorcontrib>Clausen, L. B. N.</creatorcontrib><creatorcontrib>McWilliams, K. A.</creatorcontrib><creatorcontrib>Murphy, K. R.</creatorcontrib><creatorcontrib>Mann, I. R.</creatorcontrib><creatorcontrib>Ozeke, L. G.</creatorcontrib><creatorcontrib>Korth, H.</creatorcontrib><creatorcontrib>Anderson, B. J.</creatorcontrib><creatorcontrib>Waters, C. L.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>NORA - Norwegian Open Research Archives</collection><jtitle>Journal of geophysical research. Biogeosciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wu, J.</au><au>Bryant, M. S.</au><au>Ridley, C. G.</au><au>Shen, Y.</au><au>Yang, L.</au><au>Clausen, L. B. N.</au><au>McWilliams, K. A.</au><au>Murphy, K. R.</au><au>Mann, I. R.</au><au>Ozeke, L. G.</au><au>Korth, H.</au><au>Anderson, B. J.</au><au>Waters, C. L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A comparison of small‐scale magnetic fluctuations in the Region 1 and 2 field‐aligned current systems</atitle><jtitle>Journal of geophysical research. Biogeosciences</jtitle><date>2017-03</date><risdate>2017</risdate><volume>122</volume><issue>3</issue><spage>3277</spage><epage>3290</epage><pages>3277-3290</pages><issn>2169-9380</issn><issn>2169-8953</issn><eissn>2169-9402</eissn><eissn>2169-8961</eissn><abstract>By determining the location and size of the Region 1 (R1) and Region 2 (R2) large‐scale field‐aligned currents (FACs) from Active Magnetosphere and Planetary Electrodynamics Response Experiment data, we are able to study the small‐scale magnetic fluctuations observed by the Swarm satellites embedded within the large‐scale FACs. A statistical comparison of R1 and R2 high‐frequency fluctuations is presented in terms of different solar wind conditions and geomagnetic activities. We find that (1) the amplitude of high‐frequency fluctuations in both R1 and R2 increases as the large‐scale R1 and R2 FACs intensify; (2) high‐frequency fluctuations in R1 peak near dayside dawn and dusk, while those in R2 peak around noon; (3) the location of the largest high‐frequency fluctuations in R1 shifts in local time in response to IMF By, indicating a connection between the R1 fluctuation and the driving solar wind most likely explained by magnetic reconnection; and (4) high‐frequency fluctuations in R2 are enhanced in a small region near local noon and respond clearly to nightside drivers, as characterized by the auroral electrojet index. Our analysis shows that the intensity of R1 and R2 high‐frequency magnetic fluctuations is directly connected to the intensity of FACs, which implies that the magnetic fluctuations are closely related to the magnetospheric processes that drive them.
Key Points
We study the small‐scale magnetic fluctuations embedded within large‐scale FACs
We find the fluctuation intensity scales with large‐scale FAC density
The distribution of the fluctuations is controlled by magnetospheric activity</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/2016JA023453</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0002-2373-8708</orcidid><orcidid>https://orcid.org/0000-0003-1969-5597</orcidid><orcidid>https://orcid.org/0000-0002-4442-0678</orcidid><orcidid>https://orcid.org/0000-0001-7394-7439</orcidid><orcidid>https://orcid.org/0000-0003-2121-6962</orcidid><orcidid>https://orcid.org/0000-0002-3063-6451</orcidid><orcidid>https://orcid.org/0000-0003-2543-0149</orcidid><orcidid>https://orcid.org/0000-0003-1004-7841</orcidid><orcidid>https://orcid.org/0000-0003-0746-1646</orcidid><orcidid>https://orcid.org/0000-0002-5917-7113</orcidid><orcidid>https://orcid.org/0000-0001-7965-4346</orcidid><orcidid>https://orcid.org/0000-0001-8544-4097</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2169-9380 |
| ispartof | Journal of geophysical research. Biogeosciences, 2017-03, Vol.122 (3), p.3277-3290 |
| issn | 2169-9380 2169-8953 2169-9402 2169-8961 |
| language | eng |
| recordid | cdi_cristin_nora_10852_63201 |
| source | NORA - Norwegian Open Research Archives; Access via Wiley Online Library; Wiley Online Library (Open Access Collection); Alma/SFX Local Collection |
| subjects | Alignment Auroral electrojet Electrodynamics Electrojets Field‐aligned current Fluctuation Fluctuations geomagnetic activity Geomagnetism Joints Magnetic reconnection Magnetosphere Magnetospheres Noon reconnection Satellites Small scale Solar wind solar wind drivers Storms substorm |
| title | A comparison of small‐scale magnetic fluctuations in the Region 1 and 2 field‐aligned current systems |
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