On a coral reef flat, the table is turned. Here, there is much less water (1-2 meters) and reefs are teeming with life. The timescale of change shrinks. Seawater chemistry can change dramatically over the course of a day. Tracking these changes tells us a lot about the reef, such as the rates of net calcification (construction of calcium carbonate minus dissolution) and net production (photosynthesis minus respiration).
The "robot" of our sampling team, the RAS collects
seawater samples on the shallow reef flat. The smaller
instrument next to the RAS is measuring the pH of the
- Tom DeCarlo
Joint Program in Oceanography
Woods Hole Oceanographic Institution