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*Birds Chirping fades out as music begins.*

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Narrator: Trees.

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Diverse, they can be towering giants or petite saplings.

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Some live for thousands of years recording their age in rings.

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They provide food, shade, shelter and more for wildlife and for us.

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Some tell us when the seasons change through their leaves.

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*Elk bugles in distance*

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While others continue to stand steadfast throughout the year.

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But no matter their differences, their height can reveal information

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About their ecosystems.

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By using satellites and ground based measurements

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Scientists can track tree growth and monitor how well an ecosystem supports trees.

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Tree height is also used to measure the biomass of a forest.

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Allowing scientists to calculate how much carbon is stored by trees.

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These are all important factors

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In conservation, resource management and monitoring the climate.

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By using only a smartphone and the GLOBE Observer app, citizen scientists and students

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Are helping create a global inventory of tree height. Available for everyone to use.

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You can collect your own tree height data by downloading and using the GLOBE Observer app.

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GLOBE Observer. observer.globe.com

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GLOBE Observer Supported by globe.gov

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Explore Earth

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NASA