A healthy plant is a glowing plant. That's because healthy plants that engage in photosynthesis—convert sunlight to energy—also emit fluorescent light. It's the same physical process that makes everyday objects glow in the dark. While human eyes are unable to detect the faint glow from plants, satellites hundreds of miles above Earth are up to the task. A team of researchers led by NASA scientists identified the fluorescence fingerprint in data collected by an instrument on a European meteorological satellite. A visualization of the data, released in 2013, allows scientists for the first time to see global changes in terrestrial plant fluorescence over the course of a month. That means a front-row seat to track the northward migration of plant blooming during the Northern Hemisphere springtime, as well as the shut down in fall—even before changing leaf colors indicate a seasonal shift is amiss. Watch the visualization for a tour of plant fluorescence around the world.
A glow emanates from Earth's thriving land plants.
This visualization shows the fluorescent light emitted for an average year in the life of land plants.
Watch this narrated video to learn more about how plant fluorescence works.
Fluorescence in North America represents an abundance of large trees and highly productive crops.
Fluorescence in Central Africa represents tropical rain forests; the glow elsewhere is from vegetation types such as savannas and croplands.
Fluorescence across Europe and East Asia shows croplands where grains are grown, and other vegetation types, such as forests and grasslands.
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Please give credit for this item to:
NASA's Goddard Space Flight Center