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In situ A: water temperature (°C), B: TA and DIC (µmol kg−1) and C: calcite (ΩCa) and aragonite (ΩAr) saturation states at the reef crest (black symbols) and reef flat (open symbols) over a 45-hour period on Suleman Reef, Egypt. Grey shading indicates night-time (sunset – sunrise). Data presented as mean±0.5 range of two experimental runs.
