Preprints
https://doi.org/10.5194/egusphere-2024-3261
https://doi.org/10.5194/egusphere-2024-3261
28 Oct 2024
 | 28 Oct 2024

Informativeness of teleconnections in local and regional frequency analysis of rainfall extremes

Andrea Magnini, Valentina Pavan, and Attilio Castellarin

Abstract. We propose an effective and reproducible framework to assess the informative content of teleconnections for representing and modeling the frequency regime of rainfall extremes at regional scale. Our dataset consists of 680 annual maximum series of rainfall depth, with 1 and 24 hours durations, located in northern Italy. We compute at-site time series of L-moments through sliding time windows; then we discretize the study region into tiles, where L-moments time series are averaged. We observe that the Western Mediterranean Oscillation index (WeMOI) shows strong spatial correlation patterns with gridded L-moments. Finally, in a preliminary application of climate-informed regional frequency analysis, the L-moments are modelled as functions of WeMOI. We observe high variability of WeMOI-driven rainfall percentiles predictions, and an increase in overall goodness-of-fit of the regional model relative to the stationary framework. Overall, our research suggests promising pathways for climate-informed local and regional frequency analysis of rainfall extremes, and describes general methods, that can be adapted to different environmental variables.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this paper. While Copernicus Publications makes every effort to include appropriate place names, the final responsibility lies with the authors. Views expressed in the text are those of the authors and do not necessarily reflect the views of the publisher.
Share

Journal article(s) based on this preprint

09 Oct 2025
Informativeness of teleconnections in frequency analysis of rainfall extremes
Andrea Magnini, Valentina Pavan, and Attilio Castellarin
Hydrol. Earth Syst. Sci., 29, 5031–5047, https://doi.org/10.5194/hess-29-5031-2025,https://doi.org/10.5194/hess-29-5031-2025, 2025
Short summary
Andrea Magnini, Valentina Pavan, and Attilio Castellarin

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2024-3261', Francesco Serinaldi, 29 Oct 2024
    • AC1: 'Reply on CC1', Andrea Magnini, 05 Feb 2025
  • RC1: 'Comment on egusphere-2024-3261', Anonymous Referee #1, 08 Dec 2024
    • AC2: 'Reply on RC1', Andrea Magnini, 25 Feb 2025
  • RC2: 'Comment on egusphere-2024-3261', Anonymous Referee #2, 11 Mar 2025
    • AC3: 'Reply on RC2', Andrea Magnini, 09 Apr 2025

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2024-3261', Francesco Serinaldi, 29 Oct 2024
    • AC1: 'Reply on CC1', Andrea Magnini, 05 Feb 2025
  • RC1: 'Comment on egusphere-2024-3261', Anonymous Referee #1, 08 Dec 2024
    • AC2: 'Reply on RC1', Andrea Magnini, 25 Feb 2025
  • RC2: 'Comment on egusphere-2024-3261', Anonymous Referee #2, 11 Mar 2025
    • AC3: 'Reply on RC2', Andrea Magnini, 09 Apr 2025

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to revisions (further review by editor and referees) (09 Apr 2025) by Nadav Peleg
AR by Andrea Magnini on behalf of the Authors (04 Jul 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (07 Jul 2025) by Nadav Peleg
RR by Anonymous Referee #1 (09 Jul 2025)
ED: Publish subject to minor revisions (review by editor) (10 Jul 2025) by Nadav Peleg
AR by Andrea Magnini on behalf of the Authors (30 Jul 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (01 Aug 2025) by Nadav Peleg
AR by Andrea Magnini on behalf of the Authors (01 Aug 2025)  Author's response   Manuscript 

Journal article(s) based on this preprint

09 Oct 2025
Informativeness of teleconnections in frequency analysis of rainfall extremes
Andrea Magnini, Valentina Pavan, and Attilio Castellarin
Hydrol. Earth Syst. Sci., 29, 5031–5047, https://doi.org/10.5194/hess-29-5031-2025,https://doi.org/10.5194/hess-29-5031-2025, 2025
Short summary
Andrea Magnini, Valentina Pavan, and Attilio Castellarin
Andrea Magnini, Valentina Pavan, and Attilio Castellarin

Viewed

Total article views: 1,426 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
885 122 419 1,426 27 52
  • HTML: 885
  • PDF: 122
  • XML: 419
  • Total: 1,426
  • BibTeX: 27
  • EndNote: 52
Views and downloads (calculated since 28 Oct 2024)
Cumulative views and downloads (calculated since 28 Oct 2024)

Viewed (geographical distribution)

Total article views: 1,384 (including HTML, PDF, and XML) Thereof 1,384 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 09 Oct 2025
Download

The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
This study describes a new methodology to identify regional structures in the dependence of extreme rainfall on global climate indexes. The study area is north-central Italy, but the methods are highly adaptable to other regions. We observe that the Western Mediterranean Oscillation Index has a strong influence, whose geographical pattern is in line with other studies. We show also that the use of the Index may improve the estimation of the extreme rainfall depth with a given probability.
Share