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Scientists propose moon-based climate observatory

Posted on Saturday, June 02 2007 @ 09:57:36 CEST by


Geophysicists Shaopend Huang at the University of Michigan is calling for an international effort to build monitoring stations on the Moon to study our climate.
Global climate change is driven by an imbalance between incoming energy from the sun and outgoing energy from Earth. Without understanding the climate system's inputs and outputs---its so-called energy budget---it is impossible to tease out the relative contributions of natural and human-induced influences and to predict future climate, Huang said.

But detecting changes in the energy budget is difficult with existing ground-based and space-borne technologies, he noted. Fortunately, instruments left behind by the Apollo 15 astronauts---all U-M alumni, incidentally---inadvertently provided just the necessary measurements.

"One of the main scientific objectives of the Apollo 15 mission was to drill two boreholes about three meters into the lunar soil and insert specially designed probes," Huang said. "The point was to see how temperature varies with depth, in order to calculate the heat flow outward from the interior of the moon." But drilling in the moon's powdery soil, or regolith, turned out to be much more difficult than expected..
While looking at the results of the moon borehale data Huang realised this technique could be used to monitor climate shifts on Earth:
On the near side of the airless moon, where Apollo 15 landed, surface temperature is controlled by solar radiation during daytime and energy radiated from Earth at night. Huang showed that due to an amplifying effect, even weak radiation from Earth produces measurable temperature changes in the regolith. Further, his revisit of the data revealed distinctly different characteristics in daytime and nighttime lunar surface temperature variations.
Learn more at ScienceDaily.


 



 

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