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mineral dust can travel thousands of

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miles where it interacts throughout the

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earth system in our case we're going to

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study how that mineral dust heats or

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cools planet earth currently we aren't

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sure whether mineral dust

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heats the planet or cools the planet

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we're looking at dust sources

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on the earth's surface so deserts arid

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regions wind can basically emit

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that dust into the atmosphere

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and so we are very interested in knowing

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what it is and depending on what it is

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it will tell us whether or not it is

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warming or cooling our environment

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some minerals are dark maybe more red

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they would absorb solar energy and they

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could be heating elements other cases

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minerals are bright white and they could

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reflect sunlight back into space and

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cool the atmosphere

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and these desert dust plumes once they

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get into the atmosphere they are not

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small if you look at some of the

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satellite imagery you can see these huge

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desert dust plumes larger than spain for

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example

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coming across the north atlantic so this

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is an important impact potentially on

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climate change looking into the future

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as more lands become dust-forming

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regions as they become desertified we'll

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want to understand how those changes

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will affect our climate in the future

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this experiment is so important for us

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to understand what's going on at the

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surface of the earth in terms of the

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[Music]

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first we'll launch on a resupply service

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vehicle to the international space

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station and once we're on the iss we

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would attach to the exterior of the

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space station and i can't imagine a

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better platform than the international

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space station to measure

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earth science

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emit is an imaging spectrometer so it

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has a telescope which basically collects

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a lot of light and we image all of that

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light onto

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the slit of what we call a spectrometer

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that measures light in many different

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wavelengths of the electromagnetic

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spectrum our eyes see three wavelengths

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red green and blue but emits c's in

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hundreds of wavelengths out into the the

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infrared they give us signatures like

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fingerprints

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as we're traveling on the iss looking

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down at earth focusing on the spectral

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characteristics of minerals that are on

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the earth and so the imaging

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spectrometer allows us to detect those

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spectral signatures that tell us what

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type of mineral they're actually looking

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at

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this is setting a new benchmark for the

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quality of this class of instrumentation

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this is just extraordinary it's really a

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convergence of state-of-the-art

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technology and state-of-the-art science

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so that we better understand the climate