NASA's Laser Mission to Measure Trees
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- Опубликовано: 10 сен 2024
- The Global Ecosystem Dynamics Investigation (GEDI) is a lidar instrument that sends laser pulses down to Earth, where they penetrate the globe's temperate and tropical forests. The laser beams ricochet off the first thing they hit, which can be a leaf atop a dense canopy, a protruding branch, or the ground from which the forest emerges. The energy returned to the GEDI telescope on the International Space Station will provide and intricate three-dimensional map of forest canopies.
"We can send out a little pulse of light and it travels down, reflects off the surface, and comes back," Bryan Blair, GEDI instrument scientist and deputy principal investigator, said. "We can see and measure how tall the tree is and we can actually see how dense it is as we go down."
The GEDI instrument was built at NASA's Goddard Space Flight Center in Greenbelt, Maryland, and has the highest resolution and densest sampling of any lidar every put in orbit. The mission is led by the University of Maryland and is designed to help researchers understand how ecosystems are storing carbon.
Music: Secret Science, by Lee Groves [PRS], Peter George Marett [PRS]; Team Effort, by Alexandre Prodhomme [SACEM], Eddy Pradelles [SACEM]
Credit: NASA's Goddard Space Flight Center
Matthew R. Radcliff (USRA): Lead Producer
Aaron E. Lepsch (ADNET Systems Inc.): Technical Support
Rob Andreoli (AIMM): Videographer
John Caldwell (AIMM): Videographer
Ralph Dubayah (University of Maryland): Scientist
Bryan Blair (NASA/GSFC): Scientist
Ralph Dubayah (University of Maryland): Interviewee
Bryan Blair (NASA/GSFC): Interviewee
Lisa Poje (Freelance): Animator
Walt Feimer (KBRwyle): Animator
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Thank you very much for your contribution to mankind
Lord please give me the strength to study hard and be as smart as this people
Very interesting, will GEDI be able to differentiate between living and dead trees also, as this is more important with regard to potential carbon release due to forest fires?
Treemendous
Is the laser visible light? can we see it blinking when the space station flies over us?
Most likely the beams will be in infra-red.
Yes and they will measure you as a decorative tree if you stick your hands out and hold still
DOPENESS. SUPER RAD PROJECT
NO BACKGROUND MUSIC; man's voice is all we require.
Intresting
Not all trees weigh the same? Hardwood more dense, weighs a heck of a lot more than pine.
So the calculations will need to take into acct the predominate specie and or mix not to mention their height.
How will it differentiate between different trees, as different trees should contain different amount of carbon?
I asked the same thing.
Go and compare an oak with a pine and the difference in weight/carbon content is huge.
I bet the resolution is high enough that each type of tree will generate a reasonable signature to differentiate each so a computer can do the math.
How does cutting down a tree release carbon into the atmosphere?
Most likely because they're often burned eventually, and any carbon that would have been captured by that tree from then on will remain in the atmosphere.
good question, because a good part of tree consumption goes into construction, which means that carbon is held for at least as long as the structure exists.
@@feathered3167 Comparatively few trees are used for fuel these days compared to lumber and pulp.
Ferris Vueller that’s absurd
Wood used for construction is not atmospheric carbon
No matter how the tree is destroyed; eaten by termites; turns into part of a house/boat/flag pole or kitchen cabinets over time it will decay just like the termites.
Nothing really new. It doesn't work in tropical rainforests.
Barking up the wrong tree? Lasers from space, nothing could go wrong here could it?
Are you expecting an orbital strike? I wouldn't worry. The beams would spread out losing damage potential the farther they go.
Food for thought.
Sry for the Joke... but its to good..... California Wildfires.... NASA did it....!!!!! .....proooooof !!!!