Fig. 8
Meridional distributions of a NPP (mol m−2 year−1), b UV radiation (MJ m−2), and c FDOM-C2 (RU). a Red triangles, green plus signs, and blue crosses represent the monthly averaged NPP of four NPP model outputs (VGPM, Eppley-VGPM, CAFÉ, and CbPM) interpolated for each station in November 2019, December 2019, January 2020, respectively; black circles are annually averaged NPP of four NPP model outputs interpolated for each station during period from February 2019 to January 2020. Red, green, and blue lines are the monthly and zonally averaged NPP of four NPP models in the Bay of Bengal in November 2019, December 2019, and January 2021, respectively; black line is the zonally (20° E–100° E) and annually averaged NPP of four NPP models from February 2019 to January 2020. b Colored symbols have the same meaning as in a except that they represent the UV radiation data. c Blue solid triangles and black open circles represent C2 levels just below and in the surface mixed layer, respectively. Vertical lines in each panel show the boundaries between the biogeochemical provinces. MLD: mixed layer depth. Note that the x-axis of each panel is expanded to the north in a different manner than in Figs. 2 and 7 and that the boundary of INDW is indicated by a vertical line as in those figures