**In Memoriam—Professor Trevor Platt**

The very renowned scientist in oceanography, Professor Trevor Platt, FRS, in the Plymouth Marine Laboratory in the UK, passed away on April 5, 2020. Professor Platt was born in 1942, in Salford, England, and finished an undergraduate degree at the University of Nottingham in the UK (1963). Then, he moved to Canada to study for his MA at the University of Toronto (1965) and his Ph.D. at Dalhousie University (1970). He was Head of Biological Oceanography from 1972 to 2001, acting Director in 1976, and senior scientist from 2001 to 2008 at the Bedford Institute of Oceanography, Nova Scotia, Canada. In 2008, he moved back to the UK and joined the Plymouth Marine Laboratory as a Professorial Fellow as well as executive director of the Partnership for Observation of the Global Ocean (POGO).

He provided remarkable contributions to the fundamental and applied research in the broad fields of oceanography, phytoplankton ecology, marine ecosystem dynamics, marine optics, ocean colour remote sensing, ocean carbon cycle and climate change, with numerous scientific publications (>320) during his scientific career.

Professor Platt received numerous honors, medals and awards in recognition of his contributions to oceanography, including 'APICS-Fraser Gold medal (1982)', 'Rosenstiel Gold medal (1984)', 'G. Evenly Hutchinson medal (1988)', 'Fellowship of the Royal Society of Canada, Academy of Science (1990)', 'A. G. Huntsman medal (1992)', 'Fellowship of the Royal Society of London (1998)', 'Plymouth Marine medal (1999)', 'Timothy Parsons medal (2006)', 'Prix de Distinction (2007), Department of Fisheries and Oceans, Canada', ' Prix d'Excellence, Department of Fisheries and Oceans (2008)', and 'Jawaharlal Nehru Science Fellow of the Government of India (2014)'.

Professor Platt also showed his strong leadership in numerous international scientific organizations, and contributed to: NATO Advance Study Institute, Scientific Committee on Oceanic Research (SCOR), International Joint Global Ocean Flux Study (JGOFS), American Society of Limnology and Oceanography, International Council for the Exploration of the Sea (ICES), International Geosphere-Biosphere Program (IGBP), International Ocean Colour Coordinating Group (IOCCG), and the Partnership for Observation of the Global Oceans (POGO).

In particular, as a founder and the first chairman of IOCCG, he played significant roles in raising the recognition of the importance of ocean colour remote-sensing. He had a special interest in educating and encouraging young scientists and scientists from developing countries. He organized international training courses to promote capacity-building for young scientists through IOCCG and POGO from 1997. He is survived by his loving wife and colleague of over 30 years, Dr. Shubha Sathyendranath.

Prof. Trevor Platt was one of the guest editors of this Special Issue, and we dedicate it to him.
