AUTHOR=März C. , Butler P. G. , Carter G. D. O. , Verhagen I. T. E. TITLE=Editorial: The Marine Carbon Cycle: From Ancient Storage to Future Challenges JOURNAL=Frontiers in Earth Science VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.748701 DOI=10.3389/feart.2021.748701 ISSN=2296-6463