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[ocean wave sounds]

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The oceans are absorbing extra heat

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as the planet warms.

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But exactly how much heat is difficult to measure.

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NASA scientists are developing a new method

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based on Earth's magnetic field.

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Water conducts electricity,

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so as the ocean tides cycle,

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they push and pull on the magnetic field,

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providing information on ocean temperatures.

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Better measurements of ocean heat content

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will help scientists understand the impacts of a warming climate.

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