Temporal development of the magnetic zenith effect
An experimental investigation of the temporal dynamics of the magnetic zenith (MZ) effect associated with ionospheric modification by high‐power HF electromagnetic waves is presented. The observed electron temperature enhancement when the heater beam and the UHF radar are directed along the magnetic...
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| Veröffentlicht in: | Journal of Geophysical Research: Space Physics 2011-06, Vol.116 (A6), p.n/a |
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| container_title | Journal of Geophysical Research: Space Physics |
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| creator | Honary, F. Borisov, N. Beharrell, M. Senior, A. |
| description | An experimental investigation of the temporal dynamics of the magnetic zenith (MZ) effect associated with ionospheric modification by high‐power HF electromagnetic waves is presented. The observed electron temperature enhancement when the heater beam and the UHF radar are directed along the magnetic zenith is at least twice that observed when the heater and radar are both directed vertically. It is shown that the temperature enhancement reaches the stationary state within 10 s after the heater is turned on. Such times (∼5–10 s) are typical for the development of striations with transverse sizes of the order of several meters. Also, the temporal behavior of the ion line spectra is analyzed for the field‐aligned and vertical directions of the UHF radar. A new theoretical explanation is suggested for the aspect sensitivity of the electron temperature enhancement that explains the fast manifestation of the MZ effect. Furthermore, it is shown that maximum electron heating is achieved at some intermediate inclination angle of the heater beam between the MZ and the Spitze angle. An estimate of the angle within which the maximum heating effect exists is presented.
Key Points
Experimental investigation of the magnetic zenith effect in artificial heating
A new theoretical explanation for the MZ electron temperature enhancement
The angle of maximum temperature enhancement and its fast manifestation |
| doi_str_mv | 10.1029/2010JA016029 |
| format | Article |
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Key Points
Experimental investigation of the magnetic zenith effect in artificial heating
A new theoretical explanation for the MZ electron temperature enhancement
The angle of maximum temperature enhancement and its fast manifestation</description><identifier>ISSN: 0148-0227</identifier><identifier>ISSN: 2169-9380</identifier><identifier>EISSN: 2156-2202</identifier><identifier>EISSN: 2169-9402</identifier><identifier>DOI: 10.1029/2010JA016029</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Atmospheric sciences ; Electromagnetic radiation ; Electromagnetics ; Heating ; magnetic zenith ; Radar ; Radio</subject><ispartof>Journal of Geophysical Research: Space Physics, 2011-06, Vol.116 (A6), p.n/a</ispartof><rights>Copyright 2011 by the American Geophysical Union.</rights><rights>Copyright 2011 by the American Geophysical Union</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3444-8434b38b17fbb390cba54b514c989400b3cd54f778fca9f97f08d78cac1b20e43</citedby><cites>FETCH-LOGICAL-c3444-8434b38b17fbb390cba54b514c989400b3cd54f778fca9f97f08d78cac1b20e43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2010JA016029$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2010JA016029$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,1428,11495,27905,27906,45555,45556,46390,46449,46814,46873</link.rule.ids></links><search><creatorcontrib>Honary, F.</creatorcontrib><creatorcontrib>Borisov, N.</creatorcontrib><creatorcontrib>Beharrell, M.</creatorcontrib><creatorcontrib>Senior, A.</creatorcontrib><title>Temporal development of the magnetic zenith effect</title><title>Journal of Geophysical Research: Space Physics</title><addtitle>J. Geophys. Res</addtitle><description>An experimental investigation of the temporal dynamics of the magnetic zenith (MZ) effect associated with ionospheric modification by high‐power HF electromagnetic waves is presented. The observed electron temperature enhancement when the heater beam and the UHF radar are directed along the magnetic zenith is at least twice that observed when the heater and radar are both directed vertically. It is shown that the temperature enhancement reaches the stationary state within 10 s after the heater is turned on. Such times (∼5–10 s) are typical for the development of striations with transverse sizes of the order of several meters. Also, the temporal behavior of the ion line spectra is analyzed for the field‐aligned and vertical directions of the UHF radar. A new theoretical explanation is suggested for the aspect sensitivity of the electron temperature enhancement that explains the fast manifestation of the MZ effect. Furthermore, it is shown that maximum electron heating is achieved at some intermediate inclination angle of the heater beam between the MZ and the Spitze angle. An estimate of the angle within which the maximum heating effect exists is presented.
Key Points
Experimental investigation of the magnetic zenith effect in artificial heating
A new theoretical explanation for the MZ electron temperature enhancement
The angle of maximum temperature enhancement and its fast manifestation</description><subject>Atmospheric sciences</subject><subject>Electromagnetic radiation</subject><subject>Electromagnetics</subject><subject>Heating</subject><subject>magnetic zenith</subject><subject>Radar</subject><subject>Radio</subject><issn>0148-0227</issn><issn>2169-9380</issn><issn>2156-2202</issn><issn>2169-9402</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kEtLAzEUhYMoWLQ7f8Dg2tGb1ySzLEVbS6kiVZchSRM7dV5mpmr99U4ZEVfezeXCd-45HITOMFxiIOkVAQyzEeCkOw7QgGCexIQAOUQDwEzGQIg4RsOm2UA3jCcM8ACRpSvqKug8Wrl3l1d14co2qnzUrl1U6JfStZmNvlyZtevIee9se4qOvM4bN_zZJ-jx5no5nsbzu8nteDSPLWWMxZJRZqg0WHhjaArWaM4Mx8ymMmUAhtoVZ14I6a1OfSo8yJWQVltsCDhGT9B5_7cO1dvWNa3aVNtQdpZKir1FwnEHXfSQDVXTBOdVHbJCh53CoPa9qL-9dDjt8Y8sd7t_WTWbPIwIpHKfJO5VWdO6z1-VDq8qEVRw9byYqPHTFBbJfaI4_Qa9RXDs</recordid><startdate>201106</startdate><enddate>201106</enddate><creator>Honary, F.</creator><creator>Borisov, N.</creator><creator>Beharrell, M.</creator><creator>Senior, A.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L7M</scope><scope>M2P</scope><scope>P5Z</scope><scope>P62</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope></search><sort><creationdate>201106</creationdate><title>Temporal development of the magnetic zenith effect</title><author>Honary, F. ; Borisov, N. ; Beharrell, M. ; Senior, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3444-8434b38b17fbb390cba54b514c989400b3cd54f778fca9f97f08d78cac1b20e43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Atmospheric sciences</topic><topic>Electromagnetic radiation</topic><topic>Electromagnetics</topic><topic>Heating</topic><topic>magnetic zenith</topic><topic>Radar</topic><topic>Radio</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Honary, F.</creatorcontrib><creatorcontrib>Borisov, N.</creatorcontrib><creatorcontrib>Beharrell, M.</creatorcontrib><creatorcontrib>Senior, A.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Science Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><jtitle>Journal of Geophysical Research: Space Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Honary, F.</au><au>Borisov, N.</au><au>Beharrell, M.</au><au>Senior, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Temporal development of the magnetic zenith effect</atitle><jtitle>Journal of Geophysical Research: Space Physics</jtitle><addtitle>J. Geophys. Res</addtitle><date>2011-06</date><risdate>2011</risdate><volume>116</volume><issue>A6</issue><epage>n/a</epage><issn>0148-0227</issn><issn>2169-9380</issn><eissn>2156-2202</eissn><eissn>2169-9402</eissn><abstract>An experimental investigation of the temporal dynamics of the magnetic zenith (MZ) effect associated with ionospheric modification by high‐power HF electromagnetic waves is presented. The observed electron temperature enhancement when the heater beam and the UHF radar are directed along the magnetic zenith is at least twice that observed when the heater and radar are both directed vertically. It is shown that the temperature enhancement reaches the stationary state within 10 s after the heater is turned on. Such times (∼5–10 s) are typical for the development of striations with transverse sizes of the order of several meters. Also, the temporal behavior of the ion line spectra is analyzed for the field‐aligned and vertical directions of the UHF radar. A new theoretical explanation is suggested for the aspect sensitivity of the electron temperature enhancement that explains the fast manifestation of the MZ effect. Furthermore, it is shown that maximum electron heating is achieved at some intermediate inclination angle of the heater beam between the MZ and the Spitze angle. An estimate of the angle within which the maximum heating effect exists is presented.
Key Points
Experimental investigation of the magnetic zenith effect in artificial heating
A new theoretical explanation for the MZ electron temperature enhancement
The angle of maximum temperature enhancement and its fast manifestation</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2010JA016029</doi><tpages>9</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Free Content; Wiley-Blackwell AGU Digital Library; Alma/SFX Local Collection |
| subjects | Atmospheric sciences Electromagnetic radiation Electromagnetics Heating magnetic zenith Radar Radio |
| title | Temporal development of the magnetic zenith effect |
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