Ocean chemistry is directly related to both 'short-term' and 'long-term' carbon cycles through alkalinity input, the degree of saturation to carbonate minerals, and complex controls on the carbon' biological pump' transferring organic and inorganic carbon from the surface to the deep ocean. The elements' and isotopes' different sources and sinks dictate their concentration and ratio in the ocean. Weathering and elements transport through rivers is one of the significant sources of the ocean. At the same time, precipitation, scavenging, and adsorption onto particulate matter remove elements from the sea into the sediments. While some processes are widely accepted and are often considered, other mechanisms are overlooked and may play an essential role in specific elements or isotope budgets. For example, processes such as particulate matter supply, hydrothermal reactions at mid-ocean ridge axes or flanks, and various reactions within marine sediments are also significant. They may serve as a source or a sink for the different elements. In addition, circulation along subduction zones, coastal aquifers and submarine groundwater discharge, and seafloor low-T weathering are often overlooked and may be as significant as the other processes.

Isotope systems such as Sr, Nd, S, C, and N are often used in paleoclimate and paleoceanography. Others, like Mg, Ca, Li, Ni, Cd, Mo, and U, are evolving promising proxies. The variations of the isotope systems are used to interpret past environmental changes in Earth's history. This interpretation heavily relies on these isotope systems' budget in the ocean. Thus, understanding their sources and sinks is crucial for assessing global changes on Earth.

We invite submissions dealing with any aspect of elemental or isotope budgets in the ocean, particularly those covering overlooked processes that may be significant. We encourage abstracts, including modeling global changes in the ocean and on Earth, especially those that deal with the carbon cycle and possible effects on climate in the past, present, and future.