Part A: Earth's Ocean: A storage Unit for Heat

Three-quarters that Earth's surface is extended with a substance that is a really effective heat-storage material—water. Liquid H2O have the right to absorb and store a incredible amount of heat power without coming to be too warm itself. The performance of a problem at save heat energy depends top top a parameter called certain heat.

You are watching: The amount of energy needed to change the temperature of water

Specific heat is a measure of how much energy something absorbs contrasted to how hot it gets. Much more precisely, the specific heat that a problem is the amount of power it takes come raise the temperature the 1 gram of that substance by 1 level Celsius.

Watch a short video clip from the demonstrates a "trick" that depends on the high certain heat that water.


Quantifying certain Heat

Quantitative experiments display that 4.18 Joules the heat power are required to advanced the temperature of 1g that water through 1°C. Thus, a liter (1000g) the water that enhanced from 24 come 25°C has took in 4.18 J/g°C x 1000g x 1°C or 4180 Joules of energy. For comparison, alcohol (ethanol) has a lower specific heat: the takes only 2.2 Joules of power to rise the temperature the one gram that ethanol by one degree Celsius.

To calculate the lot of heat power gained or shed by a substance, main point the mass of the substance by its certain heat consistent multiplied by the change in temperature.

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clock the beginning of this animation and note the Gulf Stream current moving phibìc in the Atlantic Ocean and also the whole Atlantic s warming up together the seasons change. As you watch the animation, holy spirit visualize the present as a river of warm energy. Stop at around 24 seconds in and also play again from 10 seconds to check out the year repeat. Usage the key for Sea surface Temperature in ~ the right.


Watch the remainder that the animation to check out a visualization of what is dubbed the Sea surface ar Temperature Anomaly in the Gulf Stream. Anomaly indicates exactly how much warmer or colder the ocean surface was compared to normal. At appropriate is a various color crucial (Ocean Temperature Departure) for reference.

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Once you've perceived the video, review this NOAA NESDIS short article to learn an ext about the data in this animation.


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