Chorus functional dependencies derived from CRRES data. Issue 15 (30th July 2013)

• Record Type: Journal Article
• Authors: Spasojevic, M.; Shprits, Y. Y.
• Is Part Of: Geophysical research letters. Volume 40:Issue 15(2013:Aug.)
• Page Start: 3793
• Page End: 3797
• Publication Date: 2013-07-30
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/grl.50755
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main" id="grl50755-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p id="grl50755-para-0001">[1] Using data from the Combined Release and Radiation Effects Satellite (CRRES) plasma wave experiment, we present quadratic fits to the mean of the wave amplitude squared, <alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgg371m1n0g" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math display="block" altimg="urn:x-wiley:grl:media:grl50755:grl50755-math-0001" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo><</mml:mo><mml:msubsup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">w</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msubsup><mml:mo>></mml:mo></mml:math></alternatives>, for lower and upper band chorus as a function of geomagnetic activity (Kp) and magnetic latitude (<italic>λ</italic>) for the midnight (21<<italic>MLT</italic>≤3), dawn (3<<italic>MLT</italic>≤9), and postnoon (12<<italic>MLT</italic>≤15) sectors and present an ad hoc model for the prenoon (9<<italic>MLT</italic>≤12) sector. The empirical models are valid for 4≤<italic>L</italic>≤7, |<italic>λ</italic>|<15° and Kp≤6 and quantify the dramatic difference in the latitudinal dependence of chorus as a function of local time and how that dependence varies with geomagnetic condition, critical parameters for calculating wave‐induced electron scattering rates. Our results are generally consistent with previous studies, and our key contribution is the quantification of wave properties in a manner that is easily incorporated into global quasi‐linear diffusion models.</p> </abstract>