Mauna Loa Seas Adj Fossil Fuel Trend Graphic | Scripps CO2 Program

Mauna Loa Seas Adj Fossil Fuel Trend


Black Curve: Seasonally adjusted monthly average atmospheric carbon dioxide concentration versus time at Mauna Loa Observatory, Hawaii (20 °N, 156 °W) where CO2 concentration is in parts per million in the mole fraction (p.p.m.). The line through the dots is a spline fit to the data.

Red Curve: Fossil fuel trend of a fixed fraction (57%) of the cumulative industrial emissions of CO2 from fossil fuel combustion and cement production. This fraction was calculated from a least squares fit of the fossil fuel trend to the observation record.

Data from Scripps CO2 Program.