That lack of association between temperature trends and CO2 has continued over the last century, as the up and down patternof global temperatures over the past 100 years does not follow the upward climb of CO2 as the industrial revolution has expanded globally.
Instead, the temperature record shows an up and down pattern that follows the patternof natural influences on global temperatures, such as cyclical sunspots and solar flares, and cycles of ocean churning from warmer to colder temperatures and back, such as the Pacific Decadal Oscillation (PDO).