CO2.Earth mainly features CO2 data from measurements made by two scientific institutions at the Mauna Loa Observatory (MLO) on the Big Island of Hawaii USA: the National Atmospheric and Oceanic Administration (NOAA) and Scripps Institution of Oceanography (SIO).  This is the site of the world's longest, continuous CO2 record of direct atmospheric measurements using high-precision instruments.  The location is near the middle of the world's largest ocean, and near the top of the world's tallest mountain, from its base (McGee, 2017, p. 99).  The Mauna Loa Observatory may be considered one of the best locations on earth for making these measurements.  NOAA notes the following locational advantages: 

"The undisturbed air, remote location, and minimal influence of vegetation and human activity at MLO are ideal for monitoring constituents in the atmosphere that can cause climate change."

~ NOAA-ESRL Webpage


Planetary Significance of the MLO Trend


At present, atmospheric CO2 is rising twice as fast as it was in the 1960s.  You can see the difference in data from the Mauna Loa Observatory.  But the rate of change is essentially the same at every CO2 monitoring station.  In the book CO2 Rising, author Tyler Volk writes:


"Data from Alaska and Samoa fit right in with the trend from Mauna Loa and the South Pole, where monitoring was begun nearly 20 years earlier.  We are witnessing a global phenomenon.  CO2 is rising everywhere, and at about the same rate."


~ Tyler Volk (2008, pp. 40-41)


For stations at different latitudes, you will find differences in amplitude—much smaller near the South Pole and much larger near the North Pole. 


Mauna Loa Links


NOAA  Mauna Loa Observatory

Scripps  Keeling Curve & lesson for long term earth observations

NOAA  Mauna Loa CO2 record


See the "MLO" tab for more links about the Mauna Loa Observatory and other earth monitoring stations.



McGee, M. (2017).  Learning for Planetary Habitability: A Lived Experience Study With Senior Earth System Scientists. (Master's thesis).  Royal Roads University, Victoria, Canada.

Volk, T. (2008). CO₂ rising: The world's greatest environmental challenge (2010 paperback ed.). Cambridge, MA: MIT Press. [MIT Press]