Počet záznamů: 1  

Properties of Whistler-Mode Waves in Plasmaspheric Plumes

  1. 1.
    0472429 - ÚFA 2017 US eng A - Abstrakt
    Kolmašová, Ivana - Santolík, Ondřej - Darrouzet, F. - Pickett, J. S. - Cornilleau-Wehrlin, N.
    Properties of Whistler-Mode Waves in Plasmaspheric Plumes.
    ISROSES III: Abstract book. Los Alamos: Los Alamos National Laboratory, 2016. s. 42.
    [International Symposium on Recent Observations and Simulations of the Sun–Earth System III (ISROSES III) /3./. 12.09.2016-16.09.2016, Varna]
    Institucionální podpora: RVO:68378289
    Klíčová slova: whistler mode waves * Cluster spacecraft * plasmasphere * plasmaspheric plumes
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    http://www.isroses.lanl.gov/Abstract_Book_ISROSES.pdf

    We analyze occurrence rates and propagation properties of whistler mode waves in plasmaspheric plumes
    using systematic observations of the Cluster spacecraft. We use a list of nearly 1000 crossings of plasmaspheric plumes
    which has been compiled using the data of the WHISPER instruments from 2001 to 2006. We combine this list with a
    database of measurements of the STAFF-SA instruments. Amplitudes of the whistler mode waves in plumes are
    investigated in connection with the geomagnetic activity. We found that the integrated VLF amplitudes reach up to 200
    pT with median values of 2-40 pT in the plume intervals.
    We combine the list of crossings of plasmaspheric plumes with all available measurements of the WBD
    instrument. We inspect sixty five plasmaspheric plume crossings which are covered by the WBD data. High-resolution
    power spectrograms allow us to classify whistler-mode waves occurring inside the plasmaspheric plumes and analyze
    their fine properties. Our results show that strong whistler-mode wave activity below 1 kHz is observed during 98% of
    analyzed plume time intervals. Additional frequency bands at higher frequencies (up to 16 kHz, in up to 3 separate
    bands) are found in 37% of analyzed spectrograms, whereas discrete emissions can be identified in 32% of cases.
    Trvalý link: http://hdl.handle.net/11104/0269738

     
     
Počet záznamů: 1  

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