Figure 2

Spatial distribution of surface chlorophyll (Chl, left panel), POC (middle panel) and the POC:Chl ratio (right panel) in the (a–c) spring (Mar.–May), (d–f) summer (Jun.–Aug.) and (g–i) fall (Sep.–Nov.) over the period of 2003–2017. Superimposed black lines denote the climatology (2003–2017) of SST (°C) in the different seasons. Squares outlined by dashed white lines indicate the four studied areas (eastern/western subarctic and subtropical regions). This and the following figures were generated using Ferret v7.3, a product of NOAA’s Pacific Marine Environmental Laboratory (information is available at http://ferret.pmel.noaa.gov/Ferret/).