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The carefully labeled components of the original nondispersive infrared (NDIR) analyzer, calibrated and deployed by Dr. Charles David Keeling in 1958, remains preserved at the Mauna Loa Observatory where it began the world's longest continuous climate record. This sophisticated instrument, now retired from service, was purchased with Weather Bureau funding during the International Geophysical Year (1957-1958) and meticulously calibrated using Keeling's manometric techniques—enabling the precision that revealed the steady atmospheric CO₂ increase from 315 parts per million to today's milestone-crossing level above 400 ppm.
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Jonathan Kingston
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Mauna Loa Observatory: Monitoring Earth's Climate Pulse
The carefully labeled components of the original nondispersive infrared (NDIR) analyzer, calibrated and deployed by Dr. Charles David Keeling in 1958, remains preserved at the Mauna Loa Observatory where it began the world's longest continuous climate record. This sophisticated instrument, now retired from service, was purchased with Weather Bureau funding during the International Geophysical Year (1957-1958) and meticulously calibrated using Keeling's manometric techniques—enabling the precision that revealed the steady atmospheric CO₂ increase from 315 parts per million to today's milestone-crossing level above 400 ppm.