Mon, 04, 21 A yellow skiff darted across a lagoon along Australia’s northeast coast, throttling down as it approached a shallow coral reef. Climate scientist Ken Caldeira piloted the craft while a younger colleague, oceanographer Manoela Romanó de Orte, sat on the bow holding a syringe filled with red dye. A yellow skiff darted across a lagoon along Australia’s northeast coast, throttling down as it approached a shallow coral reef. Climate scientist Ken Caldeira piloted the craft while a younger colleague, oceanographer Manoela Romanó de Orte, sat on the bow holding a syringe filled with red dye. Romanó de Orte injected the dye into the water, then recorded the coordinates of the spot as Caldeira maneuvered away from the expanding scarlet cloud. That bloom would soon help them gauge how well this part of the Great Barrier Reef is recovering from a series of climate-change shocks.