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Solar cycle variation of the statistical distribution of the solar wind ε parameter and its constituent variables

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Tindale, Elizabeth and Chapman, Sandra C. (2016) Solar cycle variation of the statistical distribution of the solar wind ε parameter and its constituent variables. Geophysical Research Letters, 43 (11). pp. 5563-5570. doi:10.1002/2016GL068920

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Official URL: http://dx.doi.org/10.1002/2016GL068920

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Abstract

We use 20 years of Wind solar wind observations to investigate the solar cycle variation of the solar wind driving of the magnetosphere. For the first time, we use generalized quantile-quantile plots to compare the statistical distribution of four commonly used solar wind coupling parameters, Poynting flux, B 2, the ε parameter, and vB ,between the maxima and minima of solar cycles 23 and 24. We find the distribution is multicomponent and has the same functional form at all solar cycle phases; the change in distribution is captured by a simple transformation of variables for each component. The ε parameter is less sensitive than its constituent variables to changes in the distribution of extreme values between successive solar maxima. The quiet minimum of cycle 23 manifests only in lower extreme values, while cycle 24 was less active across the full distribution range.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Solar wind -- Research -- Statistical methods, Magnetosphere, Solar cycle
Journal or Publication Title: Geophysical Research Letters
Publisher: American Geophysical Union
ISSN: 0094-8276
Official Date: 17 May 2016
Dates:
DateEvent
17 May 2016Available
12 May 2016Accepted
30 March 2016Submitted
Volume: 43
Number: 11
Page Range: pp. 5563-5570
DOI: 10.1002/2016GL068920
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
ST/N504506/1[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271

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