Preprints
https://doi.org/10.5194/angeo-2021-23
https://doi.org/10.5194/angeo-2021-23

  06 May 2021

06 May 2021

Review status: this preprint is currently under review for the journal ANGEO.

Heavy rainfall, floods, and flash floods in the context of solar wind coupling to the magnetosphere-ionosphere-atmosphere system

Paul Prikryl1, Vojto Rušin2, Emil A. Prikryl3, Pavel Šťastný4, Maroš Turňa4, and Martina Zeleňáková5 Paul Prikryl et al.
  • 1Physics Department, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada
  • 2Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia
  • 3Northern Ontario School of Medicine, Thunder Bay, ON, P7B 5E1, Canada
  • 4Slovak Hydrometeorological Institute, 833 15 Bratislava, Slovakia
  • 5Technical University of Košice, 040 00 Košice, Slovakia

Abstract. Heavy rainfall events causing floods and flash floods are examined in the context of solar wind coupling to the magnetosphere-ionosphere-atmosphere system. The superposed epoch (SPE) analyses of solar wind variables have shown a tendency of severe weather to follow arrivals of high-speed streams from solar coronal holes (Prikryl et al., 2018). Precipitation datasets based on rain-gauge and satellite sensor measurements are used to examine the relationship between the solar wind high-speed streams and daily precipitation rates over several mid-latitude regions. The SPE analysis results show an increase in occurrence of high precipitation rates following arrivals of high-speed streams, including recurrence with a periodicity of 27 days. The cross-correlation analysis applied to the SPE averages of the green (Fe XIV, 530.3 nm) corona intensity observed by ground-based coronagraphs, solar wind parameters and daily precipitation rates show correlation peaks at lags spaced by solar rotation period. When the SPE analysis is limited to years around the solar minimum (2008–2009), which was dominated by recurrent coronal holes separated by ~120˚ in heliographic longitude, significant cross-correlation peaks are found at lags spaced by 9 days. These results are further demonstrated by cases of heavy rainfall, floods and flash floods in Europe, Japan, and the U.S., highlighting the role of solar wind coupling to the magnetosphere-ionosphere-atmosphere system in severe weather, mediated by aurorally excited atmospheric gravity waves.

Paul Prikryl et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2021-23', Anonymous Referee #1, 07 May 2021
    • AC1: 'Comment on angeo-2021-23', Paul Prikryl, 18 Jun 2021
    • AC2: 'Reply on RC1', Paul Prikryl, 18 Jun 2021
  • RC2: 'Comment on angeo-2021-23', Anonymous Referee #2, 23 May 2021
    • AC3: 'Reply on RC2', Paul Prikryl, 18 Jun 2021
  • AC1: 'Comment on angeo-2021-23', Paul Prikryl, 18 Jun 2021

Paul Prikryl et al.

Paul Prikryl et al.

Viewed

Total article views: 494 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
411 74 9 494 2 3
  • HTML: 411
  • PDF: 74
  • XML: 9
  • Total: 494
  • BibTeX: 2
  • EndNote: 3
Views and downloads (calculated since 06 May 2021)
Cumulative views and downloads (calculated since 06 May 2021)

Viewed (geographical distribution)

Total article views: 461 (including HTML, PDF, and XML) Thereof 461 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 18 Jun 2021
Download
Short summary
Extreme rainfall and floods pose natural hazards with major socio-economic and health impacts. It is shown that heavy rainfall tends to follow arrivals of high-speed solar wind streams. The role of atmospheric waves generated in the auroral region as the mechanism mediating the influence of solar wind on tropospheric weather is suggested. These waves can trigger instabilities, thus initiating convection and releasing latent heat, which is the energy leading to intensification of storms.