Researchers install a spectrometer on the top of a 26-meter tower in Niwot Ridge, CO. (IMAGE)

Proceedings of the National Academy of Sciences

Researchers install a spectrometer on the top of a 26-meter tower in Niwot Ridge, CO.

Caption

Researchers install a spectrometer on the top of a 26-meter tower in Niwot Ridge, Colo. The spectrometer is used to make continuous measurements of the fluorescent 'glow' from forests.

Credit

Image courtesy of Christian Frankenberg.

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