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Heater-induced phen...
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Blagoveshchenskaya, N. F.
(author)
Heater-induced phenomena in a coupled ionosphere-magnetosphere system
- Article/chapterEnglish2006
Publisher, publication year, extent ...
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Elsevier BV,2006
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-153031
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-153031URI
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https://doi.org/10.1016/j.asr.2004.12.047DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-4398URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Experimental results from HF pumping experiments in the nightside auroral E and F region are reported. The experiments were carried out by the use of the EISCAT HF heating facility located near Tromso, Norway, allowing HF pumping the ionosphere in a near magnetic field-aligned direction. We present experimental results from multi-instrument observations related to heater-induced phenomena in a coupled ionosphere-magnetosphere system. The following results have been observed on different occasions: a reverberation effect in scattered signals observed simultaneously on two diagnostic paths which is an indication of Alfven wave generation. This phenomenon was seen under specific disturbed background geophysical conditions, namely, a high electron density in the F region up to 8 MHz produced by soft electron precipitation from the magnetosphere along with low electron density in lower ionosphere; increased ionospheric electric fields; ion outflows from the ionosphere. On another occasion a magnetospheric response to heater turning on and off was found from magnetic pulsation observations over a frequency range up to 5 Hz (the upper frequency limit of the sensitive magnetometer at Kilpisjarvi, located near Tromso). The response manifests itself about 1 min after the heater is turned on and off. Other results have shown the modification of a natural auroral arc and local spiral-like formation. It is thought that a local heater-driven current system is formed. An interesting feature is the generation of the heater-induced ion outflows from the ionosphere. They are observed in night hours under both quiet and disturbed magnetic conditions.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Kornienko, V. A.
(author)
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Borisova, T. D.
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Rietveld, M. T.
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Bösinger, T.
(author)
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Thidé, BoVäxjö universitet,Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Matematiska och systemtekniska institutionen,Datalogi,Software Technology
(author)
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Leyser, ThomasUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Brekke, A.
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Uppsala universitetInstitutet för rymdfysik, Uppsalaavdelningen
(creator_code:org_t)
Related titles
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In:Advances in Space Research: Elsevier BV38:11, s. 2495-25020273-11771879-1948
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