Tools & Technology: Pressure Loggers
Pressure loggers are tiny instruments that measure the amount of pressure exerted on them over time. Researchers place them at the bottom of glacial lakes to determine how the depth of the water changes over the course of a year. Since water has mass, more pressure = more water. You can feel this effect if you dive into a pool—the increase in pressure makes your ears pop. Using an algorithm (a mathematical relationship), researchers can compute the exact water depth from the pressure measurement.
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