Stations used in the data analyses to examine total primary production (PP) and vertical distribution of integrated PP. In our field studies reported here (orange circles), PP was calculated from photosynthetic parameters derived from incubations of samples taken in the surface and the deep chlorophyll maximum (DCM) (red triangles depict stations where only
photosynthetic parameters were determined and no PP was calculated). The 3 time series
stations HOT, CARIACO and BATS (shown with blue circle, diamond and triangle, respectively) used to examine vertical PP are also shown. To determine the global relationship between DCM depth and the nutricline depth (DNO3), the field data, the time series data and archived data from the World Ocean Atlas (WOD, green diamonds) were used. Nutricline depth, based on annual climatological nitrate fields is shown with grey shading (white areas are where surface nitrate >1 µmol kg−1)
Reference: Richardson, K. and Bendtsen, J. (2019). "Vertical distribution of phytoplankton and primary production in relation to nutricline depth in the open ocean". Marine Ecology Progress Series, 620: 33–46. doi:
10.3354/meps12960
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