NPG cover
Executive editors: Christian Franzke, Ana M. Mancho, Daniel Schertzer, Olivier Talagrand & Stéphane Vannitsem
eISSN: NPG 1607-7946, NPGD 2198-5634

Nonlinear Processes in Geophysics (NPG) is an international, inter-/trans-disciplinary, non-profit journal devoted to breaking the deadlocks often faced by standard approaches in Earth and space sciences. It therefore solicits disruptive and innovative concepts and methodologies, as well as original applications of these to address the ubiquitous complexity in geoscience systems, and in interacting social and biological systems. Such systems are nonlinear, with responses strongly non-proportional to perturbations, and show an associated extreme variability across scales.

All sections of NPG are more than ever eager to deal with big data and artificial intelligence with new sensing, analysis, and simulation technologies. These encompass approaches ranging from data-driven research to mathematical physics.

JIF
JIF2.2
JIF 5-year
JIF 5-year2.1
CiteScore
CiteScore4.8
Google h5-index
Google h5-index20

News

21 Jul 2023 New NPG Letter: Using orthogonal vectors to improve the ensemble space of the ensemble Kalman filter and its effect on data assimilation and forecasting

In the ensemble Kalman filter, the ensemble space may not fully capture the forecast errors due to the limited ensemble size and systematic model errors, which affect the accuracy of analysis and prediction. This study proposes a new algorithm to use cost-free pseudomembers to expand the ensemble space effectively and improve analysis accuracy during the analysis step, without increasing the ensemble size during forecasting. Read more.

21 Jul 2023 New NPG Letter: Using orthogonal vectors to improve the ensemble space of the ensemble Kalman filter and its effect on data assimilation and forecasting

In the ensemble Kalman filter, the ensemble space may not fully capture the forecast errors due to the limited ensemble size and systematic model errors, which affect the accuracy of analysis and prediction. This study proposes a new algorithm to use cost-free pseudomembers to expand the ensemble space effectively and improve analysis accuracy during the analysis step, without increasing the ensemble size during forecasting. Read more.

30 Jun 2023 Release of journal metrics 2022

The journal metrics 2022 were released. Please find further information on the journal metrics page.

30 Jun 2023 Release of journal metrics 2022

The journal metrics 2022 were released. Please find further information on the journal metrics page.

27 Jun 2023 Referee nomination improved

To offer our journal editors a better service and an improved experience in our online system, we have significantly improved the referee nomination tool in our review system Copernicus Office Editor. Experience more and take a look.

27 Jun 2023 Referee nomination improved

To offer our journal editors a better service and an improved experience in our online system, we have significantly improved the referee nomination tool in our review system Copernicus Office Editor. Experience more and take a look.

Recent papers

20 Sep 2023
The Sampling Method for Optimal Precursors of ENSO Event
Bin Shi and Junjie Ma
EGUsphere, https://doi.org/10.5194/egusphere-2023-2092,https://doi.org/10.5194/egusphere-2023-2092, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary
19 Sep 2023
How far can the statistical error estimation problem be closed by collocated data?
Annika Vogel and Richard Ménard
Nonlin. Processes Geophys., 30, 375–398, https://doi.org/10.5194/npg-30-375-2023,https://doi.org/10.5194/npg-30-375-2023, 2023
Short summary
19 Sep 2023
Transformation of internal solitary waves under ridged ice cover
Kateryna Terletska, Vladimir Maderich, and Elena Tobisch
EGUsphere, https://doi.org/10.5194/egusphere-2023-1992,https://doi.org/10.5194/egusphere-2023-1992, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary
13 Sep 2023
Quantification of Magnetosphere – Ionosphere coupling timescales using mutual information: response of terrestrial radio emissions and ionospheric/magnetospheric currents
Alexandra Ruth Fogg, Caitriona M. Jackman, Sandra C. Chapman, James E. Waters, Aisling Bergin, Laurent Lamy, Karine Issautier, Baptiste Cecconi, and Xavier Bonnin
EGUsphere, https://doi.org/10.5194/egusphere-2023-2055,https://doi.org/10.5194/egusphere-2023-2055, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary
12 Sep 2023
Variational Techniques for a One-Dimensional Energy Balance Model
Gianmarco Del Sarto, Jochen Bröcker, Franco Flandoli, and Tobias Kuna
EGUsphere, https://doi.org/10.5194/egusphere-2023-1994,https://doi.org/10.5194/egusphere-2023-1994, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary

Highlight articles

30 Jun 2023
| Highlight paper
Review article: Large fluctuations in non-equilibrium physics
Giovanni Jona-Lasinio
Nonlin. Processes Geophys., 30, 253–262, https://doi.org/10.5194/npg-30-253-2023,https://doi.org/10.5194/npg-30-253-2023, 2023
Short summary Executive editor
15 Feb 2023
| Highlight paper
A range of outcomes: the combined effects of internal variability and anthropogenic forcing on regional climate trends over Europe
Clara Deser and Adam S. Phillips
Nonlin. Processes Geophys., 30, 63–84, https://doi.org/10.5194/npg-30-63-2023,https://doi.org/10.5194/npg-30-63-2023, 2023
Short summary Executive editor
15 Jun 2022
| Highlight paper
Climate bifurcations in a Schwarzschild equation model of the Arctic atmosphere
Kolja L. Kypke, William F. Langford, Gregory M. Lewis, and Allan R. Willms
Nonlin. Processes Geophys., 29, 219–239, https://doi.org/10.5194/npg-29-219-2022,https://doi.org/10.5194/npg-29-219-2022, 2022
Short summary Executive editor
15 Jun 2022
| Highlight paper
Effects of rotation and topography on internal solitary waves governed by the rotating Gardner equation
Karl R. Helfrich and Lev Ostrovsky
Nonlin. Processes Geophys., 29, 207–218, https://doi.org/10.5194/npg-29-207-2022,https://doi.org/10.5194/npg-29-207-2022, 2022
Short summary
11 May 2022
| Highlight paper
Lévy noise versus Gaussian-noise-induced transitions in the Ghil–Sellers energy balance model
Valerio Lucarini, Larissa Serdukova, and Georgios Margazoglou
Nonlin. Processes Geophys., 29, 183–205, https://doi.org/10.5194/npg-29-183-2022,https://doi.org/10.5194/npg-29-183-2022, 2022
Short summary
Notice on the current situation in Ukraine

To show our support for Ukraine, all fees for papers from authors (first or corresponding authors) affiliated to Ukrainian institutions are automatically waived, regardless if these papers are co-authored by scientists affiliated to Russian and/or Belarusian institutions. The only exception will be if the corresponding author or first contact (contractual partner of Copernicus) are from a Russian and/or Belarusian institution, in that case the APCs are not waived.

In accordance with current European restrictions, Copernicus Publications does not step into business relations with and issue APC-invoices (articles processing charges) to Russian and Belarusian institutions. The peer-review process and scientific exchange of our journals including preprint posting is not affected. However, these restrictions require that the first contact (contractual partner of Copernicus) has an affiliation and invoice address outside Russia or Belarus.