The American Geophysical Union organises and disseminates scientific information in the fields of geophysics, which include atmospheric and ocean sciences; solid-Earth sciences; hydrologic sciences; and space sciences. The agujournal2018 LaTeX class provides formatting for Journal of Geophysical Research, Global Biochemical Cycles, Paleoceanography, Radio Science, Reviews of Geophysics, Tectonics, Water Resources Research, Geochemistry, Geophysics, Geosystems, Space Weather, Journal of Advances in Modeling Earth Systems (JAMES), and Earth's Future. This template is based on the one from the official author guidelines, downloaded May 2018. The example file has been modified to show how to use BibTeX to generate references in the official AGU style. The Journal of Advances in Modeling Earth Systems (JAMES) publishes research advancing the development and application of models at all scales in understanding the physical Earth system and its coupling to biological, geological, and chemical systems. Advances may be purely technical in nature, such as new or improved algorithms, parameterizations, or datasets required to support modeling; they may be synthetic, as in the integration of a new modeling or assimilation system; or they may be conceptual, developing new idealizations for modeling or new frameworks for analysis and benchmarking.