Atmospheric CO2 Levels: Green, Orange, Red...

Since 412,000 BCE, atmospheric CO2 levels ranged; in a cyclical motion, from 182-299 ppmv. CO2 levels started an upward trend after 1604 and rose above the maximum historic threshold of 300 ppmv in 1912. A most recent recording of CO2 level from the Mauna Loa Observatory was at 381.9 ppmv in 2006.


I assembled the data in a Google Doc from the following sources:

Recent CO2 records:
- Mauna Loa Observatory atmospheric CO2 Data [1958 - present]

Historical paleoclimatic CO2 records:
- Law Dome, Antarctica DE08, DE08-2, and DSS ice cores [1006 - 1978]
- Vostok ice core Data in thousands of years BCE [-412,080 - -337]

Internet Search Queries on CO2 Levels (Source Google Insights for Search):

Internet Search Queries on Global Warming (Source Google Insights for Search):

Acknowledgments:
- Rafal Raciborski, Ph.D. candidate, Department of Political Science, Emory University - for scaling the x-axis