Convenors:
Angelica Peña (Institute of Ocean Sciences, Department of
           Fisheries and Oceans, Canada)
Geraldine Sarthou (University of Brest, France)

Plenary Speaker:
Micha Rijkenberg (Royal Netherlands Institute for Sea Research, The Netherlands)

Invited Speaker:
Maeve Lohan (School of Geography, Earth and Environmental Sciences,
          University of Plymouth, UK)

Ocean chemistry has changed during the Anthropocene. International efforts such as GEOTRACES have improved scientific understanding of the marine biogeochemical cycles and distributions of trace elements, isotopes and organic chemicals in the marine environment, and their synergistic relationships with anthropogenic drivers and climate change. This session invites presentations on assessments and understanding of changes in ocean chemistry including trace elements, isotopes, radiochemistry and organic chemicals of environmental concern. Areas of focus include: (1) historical and future trends in ocean chemistry and synergistic relationships with marine biogeochemistry and ecosystems; (2) scientific outcomes of recent work on the marine biogeochemical cycles of trace elements, isotopes, radiochemistry and organic chemicals, and measurements of change in ocean chemistry (e.g., iron, mercury, lead, organic chemicals, petroleum, and plastics); and (3) future challenges facing the study of changes in ocean chemistry associated with anthropogenic drivers and climate change.