Copernicus Marine Service Ocean State Report

Abstract

An increasing trend in chlorophyll concentration is observed in the European Seas in the period 1998–2016, with the exception of the Black Sea. Annual anomalies show the subregional distributions of those trends, with remarkable east–west differences over the Mediterranean Sea. Global chlorophyll trend analysis shows an increasing trend in high latitudes and a decreasing trend in tropical areas over the past 18 years.