de Pablos, D;
Long, DM;
Owen, CJ;
Valori, G;
Nicolaou, G;
Harra, LK;
(2021)
Matching Temporal Signatures of Solar Features to Their Corresponding Solar-Wind Outflows.
Solar Physics
, 296
(4)
, Article 296. 10.1007/s11207-021-01813-5.
Preview |
Text
Pablos2021_Article_MatchingTemporalSignaturesOfSo.pdf - Published Version Download (3MB) | Preview |
Abstract
The role of small-scale coronal eruptive phenomena in the generation and heating of the solar wind remains an open question. Here, we investigate the role played by coronal jets in forming the solar wind by testing whether temporal variations associated with jetting in EUV intensity can be identified in the outflowing solar-wind plasma. This type of comparison is challenging due to inherent differences between remote-sensing observations of the source and in-situ observations of the outflowing plasma, as well as travel time and evolution of the solar wind throughout the heliosphere. To overcome these, we propose a novel algorithm combining signal filtering, two-step solar-wind ballistic back-mapping, window shifting, and Empirical Mode Decomposition. We first validate the method using synthetic data, before applying it to measurements from the Solar Dynamics Observatory and Wind spacecraft. The algorithm enables the direct comparison of remote-sensing observations of eruptive phenomena in the corona to in-situ measurements of solar-wind parameters, among other potential uses. After application to these datasets, we find several time windows where signatures of dynamics found in the corona are embedded in the solar-wind stream, at a time significantly earlier than expected from simple ballistic back-mapping, with the best-performing in-situ parameter being the solar-wind mass flux.
Type: | Article |
---|---|
Title: | Matching Temporal Signatures of Solar Features to Their Corresponding Solar-Wind Outflows |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1007/s11207-021-01813-5 |
Publisher version: | https://doi.org/10.1007/s11207-021-01813-5 |
Language: | English |
Additional information: | © 2021 Springer Nature Switzerland AG. This article is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
URI: | https://discovery.ucl.ac.uk/id/eprint/10126887 |




Archive Staff Only
![]() |
View Item |