Scientists at the California Institute of Technology and the Chinese Academy of Sciences have discovered a new way to track the global warming of the Earth's oceans: using sound. Due to the sheer volume and depth of the ocean, it is extremely difficult for scientists to obtain accurate temperature measurements. Processes are already in place to take these measurements, such as using thousands of automated floats, though they have their inaccuracies as well.

By using sound waves, scientists believe that they will be able to generate a more accurate sense of how the ocean's temperature is changing. Sound travels fast in warm water and slowly in cold water, enabling scientists to track the speed of sounds as a means to measure heat. Earthquakes are one producer of natural sound waves in the sea that are revealing surprising shifts in temperature. Overall, these new findings are opening up more possibilities for curbing global warming and rising sea levels.

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