“…These four products show very similar patterns as they are all partially based on the NASA R2018.0 and ESA reprocessing for their respective sensors, unlike Globcolour-GSM which derives Schl thanks to a specific semi-analytical ocean color model (Maritorena et al, 2002). Considering now the OC-CCI product which is widely used in the ocean color community (e.g., Fowler et al, 2023;van Oostende et al, 2023), a decreasing trend can be observed in the northern and equatorial Pacific Ocean, along the Pacific Intertropical Convergence Zone (ITCZ), the tropical Indian and northern Atlantic Oceans (Figure 1b). However, a significant positive trend of Schl appears in the northern hemisphere for higher latitudes than 40°N and in the Southern Ocean generally south of the Subtropical Front (Graham & Boer, 2013), as well as in the south-eastern Pacific.…”