ACP Letters – instructions for authors
ACP Letters are short research articles that report particularly important results and major advances in a concise and engaging style. Letters have fewer than 2,500 words in the main text and 200 words in the abstract. They include an appropriate number of figures or tables with captions (not included in word count), an appropriate number of references (no specific upper limit), and a concise description of the applied methods in the form of an appendix (up to approx. 3,000 words) in a separate appendix after the main text (see https://www.atmospheric-chemistry-and-physics.net/submission.html#manuscriptcomposition).
Letters will include one or more of the following characteristic features:
- Important discoveries and research highlights in atmospheric chemistry and physics.
- Solutions to or progress with long-standing and important questions in atmospheric research.
- Research findings of high interest to the broad geoscience community or to the broader public and media.
A manuscript submitted for consideration as an ACP Letter will initially be handled as a research article. After the completion of peer review, a decision will be made whether the manuscript can be accepted for final publication in ACP as a research article or as an ACP Letter. Papers accepted for final publication as ACP Letters will also become "highlight articles", which are promoted on the websites of ACP and EGU.
During the submission process, please make sure to specify the request for consideration as an ACP Letter in your "Cover letter (information for the Co-Editor)" and use the "Potential ACP Letter/highlight article" textbox to justify why your manuscript qualifies as an ACP Letter.
In the review process, ACP Letters are expected to be rated as outstanding/excellent in the principal review criteria. Building on the ratings and recommendations of the referees and handling editor, the ACP executive committee will decide whether to accept the paper for final publication as an ACP Letter and "highlight article". If not accepted as an ACP Letter, the manuscript may still be accepted for final publication as a research article. Under certain circumstances, e.g., if the manuscript does not comply with the formatting requirements, a paper not accepted as an ACP Letter but as a research article may still be labeled as a "highlight article" – in analogy to other manuscript types, that were from the beginning not formatted and intended as an ACP Letter (cf. EGU newsworthy research guide).