Thermal response of the f-region ionosphere for conditions of large HF-induced electron-temperature enhancements
Under current solar minimum conditions at Arecibo, Puerto Rico, large (∼1000–2000 K) enhancements in electron temperature are observed in the winter, nighttime ionosphere when high‐power 3‐MHz radio waves reflect near the F region peak. Computational modeling has been performed to determine the caus...
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| Veröffentlicht in: | Geophys. Res. Lett.; (United States) 1988-04, Vol.15 (4), p.311-314 |
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| container_title | Geophys. Res. Lett.; (United States) |
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| creator | Newman, A. L. Carlson Jr, H. C. Mantas, G. P. Djuth, F. T. |
| description | Under current solar minimum conditions at Arecibo, Puerto Rico, large (∼1000–2000 K) enhancements in electron temperature are observed in the winter, nighttime ionosphere when high‐power 3‐MHz radio waves reflect near the F region peak. Computational modeling has been performed to determine the cause of the unusually large temperature enhancements. The results indicate that low collisional cooling rates combined with strong thermal conduction along geomagnetic field lines play a key role in elevating F region temperatures and spreading the electron temperature enhancements far outside of the region where radio wave energy is deposited. Thus, the dramatically large temperature enhancements are attributable primarily to expected low cooling rates of the electron gas, rather than unexpectedly high heating rates. |
| doi_str_mv | 10.1029/GL015i004p00311 |
| format | Article |
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L. ; Carlson Jr, H. C. ; Mantas, G. P. ; Djuth, F. T.</creator><creatorcontrib>Newman, A. L. ; Carlson Jr, H. C. ; Mantas, G. P. ; Djuth, F. T. ; Space Sciences Laboratory, The Aerospace Corporation, Los Angeles, California</creatorcontrib><description>Under current solar minimum conditions at Arecibo, Puerto Rico, large (∼1000–2000 K) enhancements in electron temperature are observed in the winter, nighttime ionosphere when high‐power 3‐MHz radio waves reflect near the F region peak. Computational modeling has been performed to determine the cause of the unusually large temperature enhancements. The results indicate that low collisional cooling rates combined with strong thermal conduction along geomagnetic field lines play a key role in elevating F region temperatures and spreading the electron temperature enhancements far outside of the region where radio wave energy is deposited. Thus, the dramatically large temperature enhancements are attributable primarily to expected low cooling rates of the electron gas, rather than unexpectedly high heating rates.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/GL015i004p00311</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>640201 - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COLLISIONAL PLASMA ; COMPUTERIZED SIMULATION ; Cooling rate ; DAILY VARIATIONS ; Deposition ; EARTH ATMOSPHERE ; Earth, ocean, space ; ELECTRON TEMPERATURE ; Exact sciences and technology ; External geophysics ; F REGION ; IONOSPHERE ; Ionospheric structure (d, e, f and topside regions) ; PHYSICAL PROPERTIES ; Physics of the ionosphere ; PLANETARY IONOSPHERES ; PLASMA ; Radio waves ; SEASONAL VARIATIONS ; SIMULATION ; TEMPERATURE GRADIENTS ; THERMAL CONDUCTIVITY ; Thermal response ; THERMODYNAMIC PROPERTIES ; TIME DEPENDENCE ; VARIATIONS ; Winter</subject><ispartof>Geophys. 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Lett.; (United States), 1988-04, Vol.15 (4), p.311-314</ispartof><rights>Copyright 1988 by the American Geophysical Union.</rights><rights>1988 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5086-dc3f9fd0befc75c9e3dbe762d25374218bc2db58650e3e36a276be0c7dc7325b3</citedby><cites>FETCH-LOGICAL-c5086-dc3f9fd0befc75c9e3dbe762d25374218bc2db58650e3e36a276be0c7dc7325b3</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%2FGL015i004p00311$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2FGL015i004p00311$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,885,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7651766$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/7128755$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Newman, A. L.</creatorcontrib><creatorcontrib>Carlson Jr, H. C.</creatorcontrib><creatorcontrib>Mantas, G. P.</creatorcontrib><creatorcontrib>Djuth, F. T.</creatorcontrib><creatorcontrib>Space Sciences Laboratory, The Aerospace Corporation, Los Angeles, California</creatorcontrib><title>Thermal response of the f-region ionosphere for conditions of large HF-induced electron-temperature enhancements</title><title>Geophys. Res. Lett.; (United States)</title><addtitle>Geophys. Res. Lett</addtitle><description>Under current solar minimum conditions at Arecibo, Puerto Rico, large (∼1000–2000 K) enhancements in electron temperature are observed in the winter, nighttime ionosphere when high‐power 3‐MHz radio waves reflect near the F region peak. Computational modeling has been performed to determine the cause of the unusually large temperature enhancements. The results indicate that low collisional cooling rates combined with strong thermal conduction along geomagnetic field lines play a key role in elevating F region temperatures and spreading the electron temperature enhancements far outside of the region where radio wave energy is deposited. Thus, the dramatically large temperature enhancements are attributable primarily to expected low cooling rates of the electron gas, rather than unexpectedly high heating rates.</description><subject>640201 - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COLLISIONAL PLASMA</subject><subject>COMPUTERIZED SIMULATION</subject><subject>Cooling rate</subject><subject>DAILY VARIATIONS</subject><subject>Deposition</subject><subject>EARTH ATMOSPHERE</subject><subject>Earth, ocean, space</subject><subject>ELECTRON TEMPERATURE</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>F REGION</subject><subject>IONOSPHERE</subject><subject>Ionospheric structure (d, e, f and topside regions)</subject><subject>PHYSICAL PROPERTIES</subject><subject>Physics of the ionosphere</subject><subject>PLANETARY IONOSPHERES</subject><subject>PLASMA</subject><subject>Radio waves</subject><subject>SEASONAL VARIATIONS</subject><subject>SIMULATION</subject><subject>TEMPERATURE GRADIENTS</subject><subject>THERMAL CONDUCTIVITY</subject><subject>Thermal response</subject><subject>THERMODYNAMIC PROPERTIES</subject><subject>TIME DEPENDENCE</subject><subject>VARIATIONS</subject><subject>Winter</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNqFkUtv1DAUhSMEEkNhzTZCCLEJ9dvOEk3pDGgACcpjZznOTceQ2MH2CPrv8ShVFyyYhWXr6jtH5_pU1VOMXmFE2vPNDmHuEGIzQhTje9UKt4w1CiF5v1oh1JY3keJh9SilH6gwhVpV89Ue4mTGOkKag09Qh6HOe6iHJsK1C74uJ6S5UGUWYm2D710uw3QkRxOvod5eNs73Bwt9DSPYHINvMkwzRJMPRQd-b7yFCXxOj6sHgxkTPLm9z6ovl2-u1ttm93Hzdv1611iOlGh6S4d26FEHg5XctkD7DqQgPeFUMoJVZ0nfcSU4AgpUmLJaB8jK3kpKeEfPqmeLb0jZ6WRdBrsv4X3JpyUmSnJeoBcLNMfw6wAp68klC-NoPIRD0oQjSUX5qVMgVqRE4ayAL_8PCkaIwkrJ0ygnjBEmsCjo-YLaGFKKMOg5usnEG42RPrav_2m_KJ7fmptkzTjEUoBLdzIpOJbiaMwW7Lcb4eaUq9582lElj7JmkbmU4c-dzMSfWkgquf72YaO_rt99336W7_UF_QubPM5Z</recordid><startdate>198804</startdate><enddate>198804</enddate><creator>Newman, A. L.</creator><creator>Carlson Jr, H. C.</creator><creator>Mantas, G. P.</creator><creator>Djuth, F. T.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>198804</creationdate><title>Thermal response of the f-region ionosphere for conditions of large HF-induced electron-temperature enhancements</title><author>Newman, A. L. ; Carlson Jr, H. C. ; Mantas, G. P. ; Djuth, F. T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5086-dc3f9fd0befc75c9e3dbe762d25374218bc2db58650e3e36a276be0c7dc7325b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>640201 - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COLLISIONAL PLASMA</topic><topic>COMPUTERIZED SIMULATION</topic><topic>Cooling rate</topic><topic>DAILY VARIATIONS</topic><topic>Deposition</topic><topic>EARTH ATMOSPHERE</topic><topic>Earth, ocean, space</topic><topic>ELECTRON TEMPERATURE</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>F REGION</topic><topic>IONOSPHERE</topic><topic>Ionospheric structure (d, e, f and topside regions)</topic><topic>PHYSICAL PROPERTIES</topic><topic>Physics of the ionosphere</topic><topic>PLANETARY IONOSPHERES</topic><topic>PLASMA</topic><topic>Radio waves</topic><topic>SEASONAL VARIATIONS</topic><topic>SIMULATION</topic><topic>TEMPERATURE GRADIENTS</topic><topic>THERMAL CONDUCTIVITY</topic><topic>Thermal response</topic><topic>THERMODYNAMIC PROPERTIES</topic><topic>TIME DEPENDENCE</topic><topic>VARIATIONS</topic><topic>Winter</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Newman, A. L.</creatorcontrib><creatorcontrib>Carlson Jr, H. C.</creatorcontrib><creatorcontrib>Mantas, G. P.</creatorcontrib><creatorcontrib>Djuth, F. T.</creatorcontrib><creatorcontrib>Space Sciences Laboratory, The Aerospace Corporation, Los Angeles, California</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Geophys. Res. Lett.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Newman, A. L.</au><au>Carlson Jr, H. C.</au><au>Mantas, G. P.</au><au>Djuth, F. T.</au><aucorp>Space Sciences Laboratory, The Aerospace Corporation, Los Angeles, California</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal response of the f-region ionosphere for conditions of large HF-induced electron-temperature enhancements</atitle><jtitle>Geophys. Res. Lett.; (United States)</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>1988-04</date><risdate>1988</risdate><volume>15</volume><issue>4</issue><spage>311</spage><epage>314</epage><pages>311-314</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><coden>GPRLAJ</coden><abstract>Under current solar minimum conditions at Arecibo, Puerto Rico, large (∼1000–2000 K) enhancements in electron temperature are observed in the winter, nighttime ionosphere when high‐power 3‐MHz radio waves reflect near the F region peak. Computational modeling has been performed to determine the cause of the unusually large temperature enhancements. The results indicate that low collisional cooling rates combined with strong thermal conduction along geomagnetic field lines play a key role in elevating F region temperatures and spreading the electron temperature enhancements far outside of the region where radio wave energy is deposited. Thus, the dramatically large temperature enhancements are attributable primarily to expected low cooling rates of the electron gas, rather than unexpectedly high heating rates.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/GL015i004p00311</doi><tpages>4</tpages></addata></record> |
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| ispartof | Geophys. Res. Lett.; (United States), 1988-04, Vol.15 (4), p.311-314 |
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| subjects | 640201 - Atmospheric Physics- Auroral, Ionospheric, & Magetospheric Phenomena CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COLLISIONAL PLASMA COMPUTERIZED SIMULATION Cooling rate DAILY VARIATIONS Deposition EARTH ATMOSPHERE Earth, ocean, space ELECTRON TEMPERATURE Exact sciences and technology External geophysics F REGION IONOSPHERE Ionospheric structure (d, e, f and topside regions) PHYSICAL PROPERTIES Physics of the ionosphere PLANETARY IONOSPHERES PLASMA Radio waves SEASONAL VARIATIONS SIMULATION TEMPERATURE GRADIENTS THERMAL CONDUCTIVITY Thermal response THERMODYNAMIC PROPERTIES TIME DEPENDENCE VARIATIONS Winter |
| title | Thermal response of the f-region ionosphere for conditions of large HF-induced electron-temperature enhancements |
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