James Ledwell
A Drop in the Ocean
How can you follow a wisp of water within the turbulent immensity of the ocean? Jim Ledwell figured out a way. He developed a method to inject a harmless chemical tracer into the ocean and…
The Mysterious Movements of Deep-Sea Larvae
The marvelous migrations of fish and whales through the deep sea have been hard enough for us humans to follow. But what about tiny organisms—many smaller than the dot beneath this question mark? How they…
An Experiment to Dye For
WHOI scientists are exploring an experimental technique to track the complex movements of water in the oceans using harmless fluorescent dyes and airplanes equipped with Light Detection and Ranging instruments. To detect motion, LIDAR uses pulses of laser light, which cause the flowing dye to fluoresce.