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.

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

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.

This paper is a follow-up of a work by Miyoshi and Sun which was published in NPG Letters in 2022. The control simulation experiment is applied to the Lorenz-96 model for avoiding extreme events. The results show that extreme events of this partially and imperfectly observed chaotic system can be avoided by applying pre-designed small perturbations.

Looking to gain experience and boost your confidence as a referee? Apply for the EGU peer review training, and gain valuable insights into the peer review process. EGU is offering FREE online training in which you'll learn about the role of peer review in the publication process, in addition to review criteria and open peer review, and get hands-on experience in writing reviews. To find out more and apply, visit https://www.egu.eu/news/967/egu-peer-review-training-workshop-apply-now/.

In the coming days and weeks, readers of our journals will experience a facelift of our websites. Read more about the background.

Copernicus Publications is delighted to announce a new agreement with the UK-based Jisc (Joint Information Systems Committee) to streamline open-access publishing for their members. Read more.

The ETH Domain institutions PSI, Empa, Eawag, WSL and Copernicus Publications have signed an agreement on the central settlement of article processing charges (APCs).

From now on, manuscripts that involve funding from the Swiss National Science Foundation (SNSF) or the Luxembourg National Research Fund (FNR) will benefit from direct settlement of article processing charges (APCs).

University of Exeter Library and Copernicus Publications have signed an agreement on the central billing of article processing charges (APCs) to facilitate the publication procedure for authors.

The journal metrics 2021 were released and the current numbers are available from the journal metrics overview.

Today the European Geosciences Union and Copernicus Publications are announcing sweeping new changes, that will give our authors the ability to make vital alterations to their names in previously published scientific literature. This new policy will allow authors to retrospectively update previous publications with their current names, including conference abstracts, preprints, and peer-reviewed articles.

Decades of global research have sparked the big question: can we really control the weather? According to a study published today in Nonlinear Processes of Geophysics, this may soon be our new reality.

EGUsphere, the innovative open-access repository created by the European Geosciences Union and Copernicus Publications, is growing. For the first time, authors will be able to upload preprints to the online resource, taking advantage of EGU’s pioneering public peer-review process, whilst preparing their papers for future release.

At the end of the year, we would like to express our deep gratitude for our collaboration with all editors, referees, and authors in 2021. Please take a look at our Christmas card. Since our virtual office is closed from 23 Dec to 2 Jan and a significant number of editors and referees pause their work over the Christmas days, we extended all journal review deadlines: deadlines expiring shortly before or over Christmas have been extended to the week after and deadlines expiring after Christmas or over New Year have been extended to after New Year’s Day. Season's greetings and a happy New Year. Please stay healthy.

In April 2021 the EGU Publications Committee launched the first author survey to routinely ask authors about their publishing experience in EGU journals, in order to learn more about how EGU and Copernicus can serve the scientific community with their publications. Over the last 6 months, 160 contact authors answered the survey representing about 10% of the papers published during this time. We are delighted about the positive feedback and thank all authors. Please read the full report.

The journal metrics were updated and the current numbers are available from the journal metrics overview.

As of 1 November 2020 the direct settlement of article processing charges (APCs) between the ETH Zurich and Copernicus Publications will be valid for corresponding authors.

EGU is seeking scientists who want to gain experience in the realm of scientific publishing to pre-screen manuscripts submitted to the Union's new online platform.

This is with a deep sadness that we have to inform you that our colleague and friend José Manuel Redondo, who had been a topical editor of NPG, passed away on 14 July 2020.

The journal metrics were updated and the current numbers are available from the metrics box on the left-hand side.

Gothenburg University Library and Copernicus Publications have signed an agreement on the central billing of article processing charges (APCs) to facilitate the publication procedure for authors.

The Spanish National Research Council (Consejo Superior de Investigaciones Científicas, CSIC) will now provide a publication fund for their corresponding authors publishing in Copernicus' open-access journals.

As of 1 September 2019 the direct settlement of article processing charges (APCs) between the Helmholtz Association and Copernicus Publications will be valid for corresponding authors.

The journal metrics were updated and the current numbers are available from the metrics box on the left-hand side.

A video abstract is a short video statement providing authors with the opportunity to present background information about their findings and to showcase their research activities to a wider audience.

We are very pleased to announce the 25th anniversary of Nonlinear Processes in Geophysics. Please celebrate with us during a reception, open to all, at the EGU General Assembly 2019 in Vienna, taking place at the EGU booth (Hall X2), Monday, 8th April, 18:00.

14 scientific institutions have joined the national opt-in consortium for the central payment processing of APCs for articles of all journals published by Copernicus Publications.

Iowa State University Library and Copernicus Publications have signed an agreement on the central billing of article processing charges (APCs) to facilitate the publication procedure for authors.

To facilitate the publication procedure for authors from Helsinki University, Copernicus Publications and Helsinki University Library have signed an agreement on a central billing of article processing charges (APCs).

Data underpinning any research finding should be findable, accessible, interoperable, and reusable (FAIR) - not only for humans, but also for machines. Therefore, Copernicus Publications requests that such data are available upon publication of an article.

The latest Journal Citation Reports® have been published by Clarivate Analytics.

As of 1 May 2018 the centralized payment of article processing charges (APCs) with the Leibniz Association has been extended to 53 Leibniz Institutions participating in the Leibniz Association's Open Access Publishing Fund.

From 1 January 2018 Nonlinear Processes in Geophysics (NPG) will slightly increase the article processing charges.

Authors from the Potsdam Institute for Climate Impact Research (PIK) will profit from a new institutional agreement with Copernicus Publications starting 23 August 2017. The agreement which is valid for the first author enables a direct settlement of article processing charges (APCs) between the PIK and the publisher.

The updated publication policy now is extended by the journal's open access statement, its archiving and indexing scheme, and explicit policies on corrections and retractions.

The general obligations for editors, referees, and authors have been revised to give advice for the appropriate handling of literature suggestions.

Clarivate Analytics has published the latest Journal Citation Reports®.

From 6 June onwards, all newly submitted articles, if accepted for publication, will be distributed under the Creative Commons Attribution 4.0 International License.

To make it as easy as possible for users without technical knowledge to cut and paste or click to share DOIs, CrossRef has changed the display and citation guidelines for DOIs from "doi:10.5194/abcd" to "https://doi.org/10.5194/abcd".

Since early 2016, Copernicus Publications has been enabling authors to connect their articles with underlying or related material such as research data, model code, or scientific videos. To enhance reproducibility it is now also possible to include International Geo Sample Numbers (IGSNs) as assets.

In 2016, the 17 EGU-Copernicus peer-reviewed open-access journals experienced significant growth. We published over 3300 final-revised papers, corresponding to some 53,500 pages, a growth of about 10% compared to the previous year. These papers were downloaded over 645,000 times.

Recently we have become aware of a case of scientific malpractice by an editor of two of our journals (SOIL and SE) who used the position as editor and reviewer to disproportionately promote citations to personal papers and associated journals. Please read the published editorial.

Authors from the Technical University Darmstadt will profit from a new institutional agreement with Copernicus Publications starting 1 January 2017. The agreement which is valid for corresponding authors enables a direct settlement of article processing charges (APCs) between the university and the publisher.

As of 1 January 2017 the direct settlement of article processing charges (APCs) between the Max Planck Digital Library and Copernicus Publications will be valid for corresponding authors.

Copernicus Publications has extended the article level metrics (ALMs) by showing the geographical distribution of views. This information is available for articles published after 3 August 2016.

Copernicus Publications and the Leibniz Association have agreed on a central billing of article processing charges (APCs) to facilitate the publication procedure for authors. So far three Leibniz institutes are participating in this agreement.

Jürgen Kurths has stepped down from his role as executive editor but remains topical editor. We welcome Stéphane Vannitsem as new executive editor of NPG.

Copernicus Publications and the Technische Informationsbibliothek (TIB) in Hanover, Germany have signed an agreement on central billing of article processing charges.

We have summarized the upcoming changes to NPG by the end of the year.

In cooperation with the TIB|AV-Portal NPG authors can now add short, citable video abstracts and video supplements to their articles.

From January 2016 onwards, NPG will see changes to the way papers are archived and paid for.

The Potsdam University Library and Copernicus Publications have signed an agreement on direct settlement of article processing charges (APCs).

We have updated our data policy: it now also refers to the Data Citation Principles and stresses the necessity of data availability.

Nonlinear Processes in Geophysics (NPG) has received the new DOAJ Seal which recognizes journals with an exceptionally high level of publishing standards and best practice.

Nonlinear Processes in Geophysics (NPG) has become a member of the Committee on Publication Ethics (COPE) and thereby subscribes to the principles of COPE.

The NPG website has been given a new look, and the navigation has been adjusted. Further details:

In order to further promote open access, the TU Delft Library has transferred a budget to Copernicus to be used by its scientists in 2015.

Copernicus Publications and the University Library of the Technical University Munich (TUM) have agreed on central billing of article processing charges.

From 01 January 2015 Nonlinear Processes in Geophysics (NPG) will slightly increase the article processing charges.

Nonlinear Processes in Geophysics (NPG) has started an XML-first workflow and will provide all new articles in full-text XML from now on.

The ETH-Bibliothek (the central university library for ETH Zurich) and Copernicus Publications have signed an agreement on central billing of article processing charges.

The University of Bremen has now signed an agreement with Copernicus Publications about the central billing of article processing charges.

NPG has been transformed from an open-access journal with a traditional review process into an interactive open-access journal applying the public peer review and interactive public discussion concept.

From January 2014 on, NPG will be transformed into an interactive open-access journal applying the public peer review and interactive public discussion concept.

Article level metrics (ALMs) comprise a set of easy-to-understand real-time impact indicators that track how an article is read, discussed, or cited.

NPG has implemented publication ethics in order to guarantee high scientific and ethical standards.

NPG has just published its new data policy.

In early 2013, AGU will begin accepting nominations for a new award that recognizes excellence in research involving space weather as well as nonlinear waves and processes.