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

29 Nov 2023
Downscaling of surface wind forecasts using convolutional neural networks
Florian Dupuy, Pierre Durand, and Thierry Hedde
Nonlin. Processes Geophys., 30, 553–570, https://doi.org/10.5194/npg-30-553-2023,https://doi.org/10.5194/npg-30-553-2023, 2023
Short summary
28 Nov 2023
Improving Ensemble Data Assimilation through Probit-space Ensemble Size Expansion for Gaussian Copulas (PESE-GC)
Man-Yau Chan
EGUsphere, https://doi.org/10.5194/egusphere-2023-2699,https://doi.org/10.5194/egusphere-2023-2699, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary
23 Nov 2023
Stieltjes functions and spectral analysis in the physics of sea ice
Kenneth M. Golden, N. Benjamin Murphy, Daniel Hallman, and Elena Cherkaev
Nonlin. Processes Geophys., 30, 527–552, https://doi.org/10.5194/npg-30-527-2023,https://doi.org/10.5194/npg-30-527-2023, 2023
Short summary
21 Nov 2023
Superstatistical analysis of sea surface currents in the Gulf of Trieste, measured by high-frequency radar, and its relation to wind regimes using the maximum-entropy principle
Sofia Flora, Laura Ursella, and Achim Wirth
Nonlin. Processes Geophys., 30, 515–525, https://doi.org/10.5194/npg-30-515-2023,https://doi.org/10.5194/npg-30-515-2023, 2023
Short summary
21 Nov 2023
A quest for precipitation attractors in weather radar archives
Loris Foresti, Bernat Puigdomènech Treserras, Daniele Nerini, Aitor Atencia, Marco Gabella, Ioannis Vasileios Sideris, Urs Germann, and Isztar Zawadzki
Nonlin. Processes Geophys. Discuss., https://doi.org/10.5194/npg-2023-24,https://doi.org/10.5194/npg-2023-24, 2023
Preprint under review for NPG (discussion: open, 0 comments)
Short summary

Highlight articles

03 Nov 2023
| Highlight paper
Rate-induced tipping in ecosystems and climate: the role of unstable states, basin boundaries and transient dynamics
Ulrike Feudel
Nonlin. Processes Geophys., 30, 481–502, https://doi.org/10.5194/npg-30-481-2023,https://doi.org/10.5194/npg-30-481-2023, 2023
Short summary Executive editor
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
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.