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The dependence of solar wind burst size on burst duration and its invariance across solar cycles 23 and 24

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Tindale, Elizabeth, Chapman, Sandra C., Moloney, N. R. and Watkins, Nicholas W. (2018) The dependence of solar wind burst size on burst duration and its invariance across solar cycles 23 and 24. Journal of Geophysical Research: Space Physics, 123 (9). pp. 7196-7210. doi:10.1029/2018JA025740 ISSN 2169-9402.

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Official URL: http://dx.doi.org/10.1029/2018JA025740

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Abstract

Time series of solar wind variables are bursty in nature. Bursts, or excursions, in the time series of solar wind parameters are associated with various transient structures in the solar wind plasma and are often the drivers of increased space weather activity in Earth's magnetosphere. We define bursts by setting a threshold value of the time series and identifying how often, and for how long, it is exceeded. This allows us to study how the statistical distributions and scaling properties of burst parameters vary over solar cycles 23 and 24. We find that the distributions of burst duration and integrated burst size vary over the solar cycle and between the equivalent phases of consecutive cycles. However, there exists a single power law scaling relation between burst size and duration, with a joint area‐duration scaling exponent α that is independent of the solar cycle. This provides a solar cycle invariant constraint between possible sizes and durations of solar wind bursts that can occur.

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, Auroras
Journal or Publication Title: Journal of Geophysical Research: Space Physics
Publisher: Wiley-Blackwell Publishing, Inc.
ISSN: 2169-9402
Official Date: September 2018
Dates:
DateEvent
September 2018Published
22 August 2018Available
15 August 2018Accepted
Volume: 123
Number: 9
Page Range: pp. 7196-7210
DOI: 10.1029/2018JA025740
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 11 September 2018
Date of first compliant Open Access: 11 September 2018
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
FA9550-17-1-0054Air Force Office of Scientific Researchhttp://dx.doi.org/10.13039/100000181
UNSPECIFIEDFulbright Associationhttp://dx.doi.org/10.13039/100010629
UNSPECIFIEDLloyd's (Firm)http://viaf.org/viaf/126447642

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