10/17/2023 0 Comments Little man atmosphere![]() Graph by NOAA based on data from Lüthi, et al., 2008, via NOAA NCEI Paleoclimatology Program. ![]() On the geologic time scale, the increase (orange dashed line) looks virtually instantaneous. During these cycles, CO 2 was never higher than 300 ppm. The peaks and valleys track ice ages (low CO 2) and warmer interglacials (higher CO 2). ![]() Global atmospheric carbon dioxide concentrations (CO 2) in parts per million (ppm) for the past 800,000 years.
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