🫖 Coral Reef 2D

Two real stressors, modeled independently: above ~1–2°C over the normal summer maximum (28°C here), corals expel their symbiotic zooxanthellae and bleach; above ~30.5°C they die. Separately, ocean acidification (falling pH) lowers aragonite saturation, cutting the calcification/growth rate roughly 15% per 0.1 pH unit drop below the 8.1 pre-industrial baseline — corals can look "healthy" colored but still be growing far slower in acidified water.