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when we're talking about salt in the

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ocean we're talking pretty much the same

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salt that you use in cooking the

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chemical known as sodium chloride the

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event to the beach you've gone swimming

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in the ocean you know that the ocean is

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salty and what most people don't

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recognize is that the concentration of

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salt or what we call salinity varies

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quite a bit from one part of the ocean

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to another when water evaporates off the

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sea surface and goes into the atmosphere

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that makes the water saltier because

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you're taking fresh water out and you're

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leaving more salt behind as the minerals

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of the salt circulates around in the

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ocean it moves heat around heat that's

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carried by the ocean affects the

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atmosphere the changes of the atmosphere

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and the sea surface temperature is

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coupled together it controls climate we

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have measured sea surface temperature we

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measured winds over water sea level rise

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color of the ocean but yet we do not

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know one of the fundamental properties

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that affect climate which is the density

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of the concentration of salt in the

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ocean salinity is one of the missing

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parameters will never be measured from

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space before we have no salinity samples

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at all from parts of the world

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particularly in the southern hemisphere

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in the South Pacific and in South

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Atlantic and southern Indian Oceans so

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there's a big date again this mission

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will Aquarius is one of the most

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exciting mission to date it measures how

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salty the ocean is from space as you

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take a pinch of salt we put in a gallon

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of water we can measure that kind of

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sensitivity of salt from 408 miles above

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the earth in seven days will map the

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entire Earth and go back to the same

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point measuring it over and over again

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and will monitor over time how the

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change is in variability are

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by having salinity information from

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space or provide this missing link and

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make better predictions on the climate

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change in climate model all the

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measurements that we make in the earth

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sciences program within NASA are really

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to better understand the climate

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processes that are happening now how we

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can use that information to better

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predict the future so we can plan better

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salinity is one of those measurements

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that we need to fill an important gap to