Journal cover Journal topic
Earth System Science Data The data publishing journal
Journal topic

# Abstracted/indexed

Abstracted/indexed

• IF 10.951
• IF 5-year
9.899
• CiteScore
9.74
• SNIP 3.111
• IPP 8.99
• SJR 5.229
• Scimago H
index 38
• h5-index 33

# Manuscript preparation guidelines for authors

The following sections provide guidelines on how to prepare and compose your manuscript. Please follow these standards to ensure a smooth peer-review and production process. When preparing your manuscript, please also refer to the manuscript-type-specific guidelines.

If you or your institute plans a press release or some other promotional work on your paper, please inform Media and Communications at Copernicus (media@copernicus.org) before. We may be able to assist you and help distribute your work further.

## Technical instructions for LaTeX

Please download the Copernicus Publications LaTeX Package to prepare your manuscript. The package contains the LaTeX2e class file, the configuration file, all needed style files, as well as a template serving as the framework for your manuscript. Please download the Copernicus Publications LaTeX Package, version 5.4, 5 June 2019.

Authors are kindly requested to make use of the template.tex file embedded in the LaTeX Package since most of the definitions for the structure of manuscript elements are described there. Since we convert all typeset TeX files into XML, the expressions and markups have to be highly standardized. Therefore, please keep the following in mind:

• Please provide only one figure file for figures with several panels, and please do not use \subfloat or similar commands.
• Please use only commands in which words, numbers, etc. are within braces (e.g. \textrm{TEXT} instead of {\rm TEXT}).
• For algorithms, please use the syntax given in template.tex or provide your algorithm as a figure.
• Please do not define new commands.
• The most commonly used packages (\usepackage{}) are integrated in the copernicus.cls. Some other packages often used by the community are defined in template.tex. Please do not insert additional ones in your *.tex file.
• Spaces in labels (\label{}) are not allowed; please make sure that no label name is assigned more than once.
• Please do not use \paragraph{}; only \subsubsection{} is allowed.
• It is not possible to add tables in colour.

If you are familiar with BibTeX, you can use copernicus.bst from the package. It will sort your bibliography entries alphabetically and produce the proper layout of the reference list.

## Technical instructions for MS Word and compatible formats

To prepare your manuscript in a format compatible with MS Word (*.doc, *.docx, or *.rtf), please use the Copernicus Publications Word template (docx). Please use the Microsoft equation editor and not the graphic mode when compiling your equations.

## Technical instructions for R Markdown

To prepare your manuscript following the literate programming [1] paradigm, you can use R Markdown [2]. This format allows you to interweave text and code in a single plain-text file format. Your manuscript is then fully transparent and reproducible – see this GeoLog blog post for some background and examples [3]. R Markdown supports multiple programming languages, including R, Python, and SQL. It is intentionally kept simple and therefore very easy to learn. The Markdown document is rendered into a PDF based on the Copernicus Publications LaTeX Package (see section "Technical instructions for LaTeX") in version 5.0. Thus R Markdown manuscripts support the full features of LaTeX for chemical formulas and mathematical equations as needed, as well as powerful citation management with BibTeX.

Please install the rticles [4] package to use the Copernicus Publications template for R Markdown. You can create a new document based on the template and render it to a PDF with the following commands:

library("rticles")
library("rmarkdown")
rmarkdown::draft(file = "MyArticle.Rmd",
template = "copernicus_article",
package = "rticles", edit = FALSE) rmarkdown::render(input = "MyArticle/MyArticle.Rmd") 

The created file MyArticle.Rmd includes a YAML [5] file header with a number of configurations and required metadata, such as authors and affiliations, running title, and special sections (e.g. code/data availability, acknowledgements). These options are explained within the document and can be deleted if not needed. The template also includes examples of text formatting, figure addition, table insertion, and citation/reference usage, etc.

RStudio [5] is a recommended editor for R Markdown documents and provides a user-friendly interface for document creation and a plug-in for comfortable reference management.

Please note that the Copernicus Publications template for R Markdown is not maintained by Copernicus but by community member Daniel Nüst.

## Manuscript composition

For the review process a *.pdf file of the complete manuscript is required following the standards for sectioning and structure (see below). Tables and figures should be included in the text. All pages must be numbered consecutively and line numbers must be included.

• Sectioning and structure:
1. Title page
2. Abstract
3. Copyright statement (will be included by Copernicus)
4. Introduction
5. Sections
6. Data availability
7. Conclusions
8. Sample availability
9. Video supplement
10. Appendices
11. Supplement link (will be included by Copernicus)
12. Team list
13. Author contribution
14. Competing interests
15. Disclaimer
16. Special issue statement (will be included by Copernicus)
17. Acknowledgements
18. References
• Title page: Title (concise but informative), author first and last names, full institutional addresses of all authors, and correspondence email for proofs. Deceased co-authors should be marked accordingly, and an affiliation is not required.
• Abstract: The abstract should be intelligible to the general reader without reference to the text. After a brief introduction of the topic, the summary recapitulates the key points of the article and mentions possible directions for prospective research. Abbreviations should not be included without explanations. Please include the DOI(s) to the referenced data set(s) as well as the citation(s).
• Sections: The headings of all sections, including introduction, results, discussions or summary must be numbered. Three levels of sectioning are allowed, e.g. 3, 3.1, and 3.1.1. The abbreviation "Sect." should be used when it appears in running text and should be followed by a number unless it comes at the beginning of a sentence.
• Footnotes: These should be avoided, as they tend to disrupt the flow of the text. If absolutely necessary, they should be numbered consecutively. Footnotes to tables should be marked by lowercase letters.
• Equations: They should be referred to by the abbreviation "Eq." and the respective number in parentheses, e.g. "Eq. (14)". However, when the reference comes at the beginning of a sentence, the unabbreviated word "Equation" should be used, e.g.: "Equation (14) is very important for the results; however, Eq. (15) makes it clear that..."
• Reproduction and reuse of figures, maps, and tables: authors must secure the right to reproduce any material that has already been published or copyrighted elsewhere, and corresponding citations must be included in the text as well as in the captions. If distribution licences other than CC BY are applied, corresponding statements must be included in the captions. If applicable, maps from map providers such as Google Maps or OpenStreetMap used in manuscripts must include the required copyright and distribution licence statements of the map provider. Authors must adhere to the individual redistribution permissions. The copyright and distribution licences of such maps must be visible in the maps themselves.
• Figure composition: It is important for the production process that separate figures are submitted. Composite figures containing multiple panels should be collected into one file before submission. The figures should be labelled correctly with Arabic numerals (e.g. fig01, fig02). They can be submitted in *.pdf, *.ps, *.eps, *.jpg, *.png, or *.tif format and should have a resolution of 300 dpi. The width should not be less than 8 cm. A legend should clarify all symbols used and should appear in the figure itself, rather than verbal explanations in the captions (e.g. "dashed line" or "open green circles"). Tips for producing high-quality line graphics:
1. The first choice should be vector graphics in *.eps or *.pdf format. Fonts must be embedded. Please make sure that the *.pdf files do not contain hidden objects. If you want to adjust fonts in your original figure file before converting into *.pdf, please make sure that you change the actual font of the original figure rather than adding text boxes or other additional layers.
2. Please use only one font family in your figures (e.g. Arial or Times). Keep in mind that the usage of regular, italic, bold, and bold-italic of one font family already leads to four different fonts that must be embedded or adjusted by our image processors in case of text corrections within figures.
3. If the processing of your vector figures requires an exceptional amount of time due to multiple fonts or hidden objects, we reserve the right to convert your *.eps or *.pdf figures into *.png files for the further production process.
4. If the usage of vector graphics is not possible, a bitmap image should be saved in a "non-lossy" format (e.g. *.png). A high quality is recommended. It is always possible to reduce the size of the figure later.
5. The *.jpg format should only be used for photos. It is not suitable for sharp edges. Note that it is not advisable to convert a *.jpg file back to *.png. If *.jpg files must be used please save them with high quality.
6. If you are not able to fulfil the above-mentioned criteria, it is also possible to submit figures produced with Excel, PowerPoint, Word, Photoshop, Illustrator, or InDesign in the original file format. Our image processors will then produce the figures from these source files.
7. For maps and charts, please keep colour blindness in mind and avoid the parallel usage of green and red. For a list of colour scales that are illegible to a significant number of readers, please visit ColorBrewer 2.0.

The abbreviation "Fig." should be used when it appears in running text and should be followed by a number unless it comes at the beginning of a sentence, e.g.: "The results are depicted in Fig. 5. Figure 9 reveals that...".

• Figure content guidelines: In order to facilitate consistency with our language and typesetting guidelines applied to the text of the manuscript, please keep the following in mind when producing your figures:
1. Labels of panels must be included with brackets around letters being lower case (e.g. (a), (b), etc.).
2. Ranges need an en dash and no spaces between start and end (e.g. 1–10, Jan–Feb).
3. Coordinates need a degree sign and a space when naming the direction (e.g. 30° N, 25° E).
4. Spaces must be included between number and unit (e.g. 1 %, 1 m).
5. Units must be written exponentially (e.g. W m–2).
6. Common abbreviations to be applied: hour as h (not hr), kilometre as km, metre as m.
7. Capitalization: only the first word is capitalized in headers (in addition to proper nouns). More guidelines are provided in section English guidelines and house standards.
8. Maps: please adhere to United Nations naming conventions for maps used in your manuscript. In order to depoliticize scientific articles, authors should avoid the drawing of borders or use of contested topographical names. The editors reserve the right to insert the label "under dispute" if contested borders are presented. If disputed territories are relevant for your map, please make sure that the figure caption stays neutral as well as the legend and labelling within your map.
• Figure captions: Each illustration should have a concise but descriptive caption. The abbreviations used in the figure must be defined, unless they are common abbreviations or have already been defined in the text. Figure captions should be included in the text file and not in the figure files.
• File size: Authors are kindly asked to find the best balance between the quality of figures and submitted material on the one hand, and a manageable file size on the other hand. Individual figures in the *.pdf format should not exceed 2 MB, file types other than *.pdf should not exceed 5 MB per figure, and the overall size of all submitted files, excluding supplements, should not exceed 30 MB.
• Plot data: Authors are encouraged to put the data needed to create the plots, which are included in the manuscript, in a supplement to the published article (see below). Then, reviewers and readers are able to reproduce the plots.
• Tables: Any tables should appear on separate sheets after the references and should be numbered sequentially with Arabic numerals. For the production of the accepted manuscript, they should be submitted as MS WORD or included in the LaTeX file. Tables submitted as a PDF or an image file cannot be processed. Tables should be self-explanatory and include a concise, yet sufficiently descriptive caption. Horizontal lines should normally only appear above and below the table, and as a separator between the head and the main body of the table. Please note that the word "Table" is never abbreviated and should be capitalized when followed by a number (e.g. Table 4).
• Data sets: The data sets described in the manuscript need to be deposited in reliable data repositories including the assignment of digital object identifiers. Authors are required to properly cite the data sets in the abstract, text, and the reference list (see section References below). In addition, authors are required to provide a statement on how their research data can be accessed. This must be mentioned in the abstract and placed as the section "Data availability" at the end of the manuscript before the conclusions. Please see also our data policy.
• Video supplements and video abstracts: authors are encouraged to upload videos associated with their manuscript to the TIB AV-Portal for archiving and DOI registration, facilitating proper citation of the videos in their manuscript. Please find more information in the dedicated section below.
• Sample availability: if geoscientific samples which are registered as International Geo Sample Number (IGSN) have been used for the manuscript, authors are required to include the IGSN in the reference list, cite it in the article, and provide a statement on how to access the sample by adding a section "Sample availability" to the manuscript.
• Appendices: These should be labelled with capital letters: Appendix A, Appendix B etc. Equations, figures and tables should be numbered as (A1), Fig. B5 or Table C6, respectively. Please keep in mind that appendices are part of the manuscript whereas supplements (see below) are published along with the manuscript.
• Supplement:
1. Authors have the opportunity to submit supplementary material with their manuscript, such as additional figures and tables, plot data, movies, animations, highly detailed and specific technical information, such as computer programme code, user manuals, maps, very large images, etc.
2. The supplement shall contain only complementary information but no scientific interpretations or findings/messages that would go beyond the contents of the manuscript.
3. Supplements will receive their own DOI (digital object identifier) and will be published online along with the article as *.zip archive or single *.pdf file.
4. Supplements will receive a title page added during the publication process including title ("Supplement of"), authors, and the correspondence email. Therefore, please avoid providing this information in the supplement.
5. Equations, figures and tables in supplements should be numbered as (S1), Fig. S5 or Table S6. Sections are numbered as S3, S3.1, and S3.1.1.
6. The overall file size of a supplement is limited to 50 MB. Authors of larger supplements are kindly asked to submit their files to a reliable data repository and to insert a link in the manuscript. Ideally, this linkage is realized through DOIs.
• Author contribution: Authors are required to add a section "Author contribution" before the acknowledgements in which the contributions of all co-authors are briefly described. Example: AA and BB designed the experiments and CC carried them out. DD developed the model code and performed the simulations. AA prepared the manuscript with contributions from all co-authors.
• Competing interests: Declaration of all potential conflicts of interest is required by Copernicus Publications as this is an integral aspect of a transparent record of scientific work. Please see our competing interests policy.
1. If there are no competing interests in their submitted manuscripts, authors should state: "The authors declare that they have no conflict of interest."
2. If there are possible conflicts of interest, authors must state what competing interests are relevant to the submitted work: "Author A is a member of the editorial board of the journal. Author B has received research funding from Company Y. Author C is a member of committee Z."
• Review criteria: While preparing their manuscript, authors are kindly requested to consider the manuscript review criteria to meet the quality standards and to reduce the peer-review processing time.

## References

Papers should make proper and sufficient reference to the relevant formal literature. Informal or so-called "grey" literature may only be referred to if there is no alternative from the formal literature. Works cited in a manuscript should be accepted for publication or published already. In addition to literature, data and software used should be referenced (citations should appear in the body of the article with a corresponding reference in the reference list). These references have to be listed alphabetically at the end of the manuscript under the first author's name. Works "submitted to", "in preparation", "in review", or only available as preprint should also be included in the reference list. Please do not use bold or italic writing for in-text citations or in the reference list.

Please supply the full author list with last name followed by initials. After the list of authors, the complete reference title needs to be named. Journal names are abbreviated according to the Journal Title Abbreviations by Caltech Library, followed by the volume number, the complete page numbers (first and last page) and the publication year. If the abbreviation of a journal name is not known, please use the full title. In addition to journal articles, all reference types are summarized together with examples below.

If there is more than one work by the same first author, their papers are listed in the following order: (1) single author papers (first author), followed by (2) co-author papers (first author and second author), and finally (3) team papers (first author et al.). Within these three categories the respective papers are then listed as follows:

• Single author papers: chronologically, beginning with the oldest. If there is more than one paper in the same year, a letter (a, b, c) is added to the year, both in the in-text citation as well as in the reference list.
• Co-author papers: first alphabetically according to the second author's last name, and then chronologically within each set of co-authors. If there is more than one paper in the same year per set of co-authors, a letter (a, b, c) is added to the year both in the in-text citation as well as in the reference list.
• Team papers: first chronologically (beginning with the oldest), independent of the team author names, then alphabetically within each year according to the second (third, etc.) author. If there is more than one paper in the same year for a first author (independent of the team), a letter (a, b, c) is added to the year both in the in-text citation as well as in the reference list.

In terms of in-text citations, the order can be based on relevance, as well as chronological or alphabetical listing, depending on the author's preference.

## Examples for reference sorting

In general, in-text citations can be displayed as "[…] Smith (2009) […]", or "[…] (Smith, 2009) […]".

 Reference List Short Citation Single author: chronologically Smith, P.: …, 2009. Smith, 2009 Smith, P.: …, 2010a. Smith, 2010a Smith, P.: …, 2010b. Smith, 2010b Co-authors: alphabetically before chronologically Smith, P. and Brown, P.: …, 2010. Smith and Brown, 2010 Smith, P. and Carter, T.: …, 2007. Smith and Carter, 2007 Smith, P. and Carter, T.: …, 2010a. Smith and Carter, 2010a Smith, P. and Carter, T.: …, 2010b. Smith and Carter, 2010b Smith, P. and Thomson, A.: …, 2005. Smith and Thomson, 2005 Team: chronologically before alphabetically Smith, P., Thomson, A., and Carter, T.: …, 2006. Smith et al., 2006 Smith, P., Carter, T., and Hanson, M. B.: …, 2008a. Smith et al., 2008a Smith, P., Carter, T., and Walter, N.: …, 2008b. Smith et al., 2008b Smith, P., Carter, T., and Hanson, M. B.: …, 2009. Smith et al., 2009 Smith, P., Brown, P., and Walter, N.: …, 2010. Smith et al., 2010

Please do not use bold or italic writing in the reference list or for in-text citations.

## Examples for reference types

• Journal article
• Author(s) (initials always after last name)
• Article title
• Journal title abbreviation
• Volume
• Page numbers or article number
• DOI
• Year

Porter, J. G., De Bruyn, W., and Saltzman, E. S.: Eddy flux measurements of sulfur dioxide deposition to the sea surface, Atmos. Chem. Phys., 18, 15291–15305, https://doi.org/10.5194/acp-18-15291-2018, 2018.

• Book
• Author(s), editor(s) (initials always after last name)
• Book title
• Edition
• Series title and volume (if any)
• Editors (if not authors)
• Publisher
• Location
• Total pages (optional) pp.
• Year

Singh, O. N. and Fabian, P. (Eds.): Atmospheric Ozone: a Millennium Issue, Copernicus Publications, Katlenburg-Lindau, Germany, 2003.

• Book chapter
• Author(s) (initials always after last name)
• Article title
• Book title
• Edition (if any)
• Editors (if any)
• Publisher
• Location
• Page numbers of article in book
• Year

van Edig, X., Schwarze, S., and Zeller, M.: The robustness of indicator based poverty assessment tools in changing environments – empirical evidence from Indonesia, in: Tropical Rainforests and Agroforests under Global Change, Environmental Science and Engineering (Environmental Engineering), edited by: Tscharntke, T., Leuschner, C., Veldkamp, E., Faust, H., Guhardja, E., and Bidin, A., Springer, Berlin, Heidelberg, Germany, 191–211, https://doi.org/10.1007/978-3-642-00493-3_9, 2010.

• Presented paper
• Author(s) (initials always after last name)
• Paper title
• Name of meeting/conference
• Location of meeting/conference
• Date of meeting/conference
• Abstract number
• Year

Keppler, F., Hamilton, J., Braß, M., and Röckmann, T.: An overlooked major source of atmospheric methane: in situ formation in plants, EGU General Assembly, Vienna, Austria, 2–7 April 2006, EGU06-A-08188, 2006.

• Presented paper published in conference proceedings
• Author(s) (initials always after last name)
• Paper title
• Proceedings title
• Name of meeting/conference
• Location of meeting/conference
• Date of meeting/conference
• Abstract number or page numbers
• Year

Iwata, M., Matsumoto, H., and Kojima, H.: Computer experiments on the plasma wave generation in the vicinity of Earths bow shock, in: Proceedings of the 6th International School/Symposium on Space Plasma Simulation Overview, Garching, Germany, 3–8 September 2001, 4–6, 2001.

• Data set
• Creators
• Title
• Publisher/repository
• Persistent identifier
• Publication year

Loew, A., Bennartz, R., Fell, F., Lattanzio, A., Doutriaux-Boucher, M., and Schulz, J.: Surface Albedo Validation Sites, EUMETSAT, http://dx.doi.org/10.15770/EUM_SEC_CLM_1001, 2015.

• Model code
• Creator
• Title
• Publisher/repository
• Persistent identifier
• Publication year

Randall, D., Dazlich, D., Heikes, R., and Konor, C.: CSU model for DCMIP 2016, Zenodo, http://doi.org/10.5281/zenodo.5800992018, 2017.

• Report, map, thesis, and dissertation
• Author(s) (Initials always after last name!)
• Title
• Report designator (M.S., Ph.D., etc.)
• Issuing organization/university
• Location
• Total pages (optional) pp.
• Year

Monger, J. W. H. and Journeay, J. M.: Guide to the geology and tectonic evolution of the southern Coast Mountains, Geol. Surv. of Can., Ottawa, Ont., Open File Rep. 2490, 77 pp., 1994.

Brown, R. J. E.: Permafrost in Canada, Geol. Surv. of Can., Ottawa, Ont., Map 1246A, 1967.

Kronberg, E. A.: Dynamics of the Jovian Magnetotail, Ph.D. thesis, International Max Planck Research School, Universities of Braunschweig and Göttingen, Germany, 133 pp., 2006.

• Webpages
• Title
• URL
• Access date
• Year (if not the same as access date)

Copernicus Publications: https://publications.copernicus.org/, last access: 25 October 2018.

If an article is available via the internet, an URL address can be inserted before the year, e.g. "available at: https://www.copernicus.org/, 2018".

## Mathematical notation and terminology

• Mathematical symbols and formulae: In general, mathematical symbols are typeset in italics. The most notable exceptions are function names (e.g. sin, cos), chemical formulas, and physical units, which are all typeset in roman (upright) font. Matrices are printed in boldface, and vectors in boldface italics. A range of numbers should be specified as "a to b" or "a...b". The expression "a–b" is only acceptable in cases where no confusion with "a minus b" is possible.
• Equations should be numbered sequentially with Arabic numerals in parentheses on the right-hand side, e.g. (1), (2). If too long, split them accordingly. If there are chemical formulae included, e.g. reactions, please number them (R1), (R2), etc. When using Word, the equation editor and not the graphic mode should be used under all circumstances.
• Units: For units of physical quantities, the metric system is mandatory and, wherever possible, SI units should be used. Hereby, we differentiate between SI base units, SI-accepted units, and SI-derived units. Regarding the abbreviation of such units, SI base units and SI-accepted units must be abbreviated in conjunction with numbers (e.g. the velocity is 10 km h-1) and must be written out without numbers (e.g. the velocity is given in kilometres per hour). SI-derived units must also be written out when they do not contain a number. If they contain numbers, the abbreviation is preferred where possible (e.g. the average atmospheric pressure is 1013 hPa), but authors can decide not to abbreviate them if no abbreviation is commonly used (e.g. the distance is 237 nautical miles). Regarding the notation, if units of physical quantities are in the denominator, contain numbers, and are abbreviated, they must be formatted with negative exponents (e.g. 10 km h-1 instead of 10 km/h). Commonly used examples for units without abbreviation are week, month, or decade. These should be written out and not be formatted with negative exponent if placed in the denominator (e.g. 10 kg per week). Units of non-physical quantities must not be abbreviated and if they are in a denominator, they must also not be exponentially notated (e.g. two cars per household).
• Date and time: 25 July 2007 (dd month yyyy), 15:17:02 (hh:mm:ss). Often it is necessary to specify the time if referring to local time or universal time coordinated. This can be done by adding "LT" or "UTC", respectively. If needed when referring to years, CE (common era) and BCE (before the common era) should be used instead of AD and BC since CE and BCE are more appropriate in interfaith dialogue and science.
• In addition, the SI and IUPAC recommendations should be followed:
1. SI brochure
2. IUPAC Green Book, 3rd edition
3. IUPAC Gold Book

## English guidelines and house standards

The following aims to provide guidelines for authors on how to compose their manuscript with regards to conventions of English. Please note that the copy editor is responsible for applying these guidelines in addition to checking the grammar and punctuation of each manuscript (see English copy-editing services for more information). However, assistance from the author will expedite the production process.

• Variety of English: We accept all standard varieties of English in order to retain the author’s voice. However, the variety should be consistent within each article. When using Oxford spellings, please do so consistently. For example, if "characterize" is spelled as such, then the -z- variant should be used for all such words throughout the article. The use (or lack thereof) of the Oxford (serial) comma should also be consistent. Authors will be prompted to select an English variety when they upload the final revised version of the manuscript. The copy editor will then ensure that the variety is consistent.
• Spelling: We recommend consulting one of the following dictionaries: Oxford, Cambridge, Merriam-Webster, or Collins. Where appropriate, use the anglicized version of place names (e.g. Zurich, Rome, Munich). Names that have been transliterated into English often have numerous spelling variants. For geographical locations, we consult The Times Atlas of the World for the most commonly used spelling. Please ensure that foreign names have the appropriate diacritics (e.g. accents, umlauts). In accordance with IUPAC, it is our house standard to use the -f- spelling for sulfur (instead of sulphur) and related words for all varieties of English.
• Abbreviations
• Abbreviations should be avoided in the title, depending on the length and familiarity of abbreviation.
• They need to be defined in the abstract and then again at the first instance in the rest of the text. In order to avoid ambiguity, abbreviations that could have numerous meanings must be defined (e.g. "GCM" could stand for "global climate model" or "general circulation model"). This generally does not apply to abbreviations that are better known than their written-out form (e.g. NASA, GPS, GIS, MODIS).
• Units do not need to be defined.
• Please note that most abbreviations in the plural are followed by the suffix –s (e.g. GCMs, RMSEs), although there are some exceptions (e.g. CCN, ECMWF).
• Ma and Myr (also Ga, ka; Gyr, kyr): "Ma" stands for "mega-annum" and literally means millions of years ago, thus referring to a specific time/date in the past as measured from now. In contrast, "Myr" stands for millions of years and is used in reference to duration (CSE, p. 398; North American commission on stratigraphic nomenclature).
• CE (common era) and BCE (before the common era) should be used instead of AD and BC since CE and BCE are more appropriate in interfaith dialogue and science.
• Capitalization
• Titles and headings follow sentence-style capitalization (i.e. first word and proper nouns only).
• Proper nouns should be capitalized. A proper noun refers to a unique entity. If there is more than one of the item in question, it is probably not a proper noun and should not be capitalized. A capitalized abbreviation does not necessarily warrant the capitalization of the written-out form. For example "LAI" is capitalized, but "leaf area index" is not. Non-standard usage of capitalization is only acceptable for proper nouns (e.g. "SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY" as the written-out form of "SCIAMACHY").
• The capitalization of the term "earth" is disputed and based on subjective criteria. Please simply ensure that the capitalization (or lack thereof) is consistent.
• Cardinal directions should only be capitalized when part of a proper noun (e.g. South Dakota, Northern Ireland, North America, but eastern France). If you are unsure, consult an atlas.
• Capitalize generic geographic terms, such as "river", when they are part of a place name, but do not capitalize the generic term when it appears on its own, when it follows a capitalized generic term, or when it is in the plural (e.g. Mississippi River, Mississippi River basin, Mississippi and Missouri rivers).
• Capitalize taxonomic ranks genus and higher.
• "Early", "middle", and "late" are capitalized only when part of the formal name but lower-cased when used as modifiers of formal names (e.g. Early Jurassic, early Miocene, late Holocene). This applies to "upper", "middle", and "lower" as well. For more information, we recommend consulting the International Commission on Stratigraphy and Geological Society of America.
• Italicization
• Italic font may be used for emphasis, although this should be used sparingly (e.g. data were almost consistent).
• Foreign words, phrases, and abbreviations that cannot be found in any English dictionary (this does not apply to proper nouns) are italicized. Common Latin phrases are not italicized (for example, et al., cf., e.g., a priori, in situ, bremsstrahlung, and eigenvalue).
• Ship names are italic, but their prefixes are roman (e.g. RV Polarstern).
• Genus and species names are italic; high-order taxonomic ranks are roman.
• When mentioned in running text, the names of books, journals, pamphlets, magazines, and newspapers are italicized.
• Numbers
• For items other than units of time or measure, use words for cardinal numbers less than 10; use numerals for 10 and above (e.g. three flasks, seven trees, 6 m, 9 d, 10 desks).
• Spell out ordinals "first" to "ninth".
• Use numerals with units and expressions when used in a scientific or mathematical sense (e.g. increased 2-fold, 1 standard deviation, 3 orders of magnitude, 2 times the height (but the beaker was rinsed two times), a factor of 3).
• Spell out numbers when they begin a sentence or when the sentence cannot be reformulated.
• For very large numbers, use a combination of numerals and words (e.g. 1 billion people).
• Use all numerals in a series or range containing numbers 10 or greater (e.g. 5, 7, and 13 experiments) or in a parallel construction.
• Use words for instances such as "tens of millennia" and "non-zero".
• Spell out and hyphenate fractions in which the numerator and denominator are both less than 10 (e.g. two-thirds).
• Hyphens
• Do not use hyphens between an adverb ending in –ly and the word it is modifying (e.g. "statistically based results", not "statistically-based results").
• Latin phrases should not be hyphenated (e.g. "in situ", not "in-situ").
• It is our house standard not to hyphenate modifiers containing abbreviated units (e.g. "3-m stick" should be "3 m stick"). This also applies to the other side of the hyphenated term (e.g. "3 m long rope", not "3-m-long rope").
• En dashes (–) are longer than hyphens (-) and serve numerous purposes. Please note that we use spaced en dashes for syntactic constructions, not em dashes (—). En dashes are used to indicate, among other things, relationships (e.g. ocean–atmosphere exchange), ranges (e.g. 12–20 months), and components of a mixture (e.g. dissolved in 5:1 glycerin–water). They are also used to link the names of two or more persons used as a modifier (e.g. Stefan–Boltzmann constant).
• Quotes
• Use double quotation marks in all instances, unless quotation marks are also required within material surrounded by double quotation marks.
• In these intra-quotation-mark instances, single quotation marks are used. Please note that quoted material should be punctuated with quotation marks but not italicized.
• In quotations from printed sources, the spelling, capitalization, and punctuation should normally follow the original.
• Quotations can also be used to denote an unfamiliar or newly coined term or phrase. They may also be used to introduce a term but only once at the first instance.
• It is our house standard to position commas and periods outside the end quotation marks.
• The following titles should be surrounded by quotation marks in running text: journal articles, book chapters, and series titles (special issues).

## Author's response

The author's response (also final author comment in the public discussion) should be structured in a clear and easy-to-follow sequence: (1) comments from referees/public, (2) author's response, and (3) author's changes in manuscript. Regarding author's changes, a marked-up manuscript version (track changes in Word, latexdiff in LaTeX) converted into a *.pdf including the author's response must be submitted.

## Video supplements and video abstracts

In collaboration with the German National Library of Science and Technology (TIB), Copernicus Publications provides authors with the possibility of uploading video supplements and/or video abstracts relating to their accepted article.

1. Register via the respective tab on the AV Portal.