Fig. 1: Sampling stations and oceanographic conditions during the expeditions.
From: A source of isotopically light organic carbon in a low-pH anoxic marine zone
a Study area, including six sampling stations (T1–T6), and a longitudinal section from 20° down to 29.5°S, including six sampling stations (L1–L6). b 25 November–2 December 2015 composite of MODIS-Aqua SST for LowPhox I; units are in °C; persisting clouds appear in white. c Upwelling Indices for the oceanic region offshore Iquique for November 2015; black: 6-h intervals and red daily averages; units are in kg m−1 s−1. d 2–9 February 2018 composite of MODIS-Agua SST for LowPhox II; units are in °C; persisting clouds appear in white. e Upwelling index for the oceanic region offshore Iquique from 1 January to 12 February 2018; the black lines are 6-h intervals and red dots correspond to daily averages; units are in kg m−1 s−1.
