Review Published on 22 May 2019 Scaling Up From Regional Case Studies to a Global Harmful Algal Bloom Observing System in Ocean Observation Clarissa R. AndersonElisa BerdaletRaphael M. KudelaCaroline K. CusackJoe SilkeEleanor O’RourkeDarcy DuganMolly McCammonJan A. NewtonStephanie K. Moore Frontiers in Marine Science doi 10.3389/fmars.2019.00250 169,365 views 124 citations