How do direct atmospheric measurements of CO2 compare with proxy records?

Sep 3, 2024 ... Global warming and greenhouse gas emissions. The greenhouse effect refers to how certain gases in the Earth's atmosphere allow short-wave ... The GLODAP data show that the world ocean has so far only absorbed around 40 per cent of the carbon dioxide discharged by humans into the atmosphere between ... Feb 2, 2020 ... Their results showed that 2.7 billion years ago, carbon dioxide comprised at least 70 percent by volume of Earth's atmosphere. Assuming the Sun ... Sep 17, 2023 ... Mars' atmosphere is over 100 times thinner than Earth's and is primarily composed of carbon dioxide, nitrogen and argon gases. These studies suggest that approximately 95% of atmospheric CO2 is natural. Aug 12, 2020 ... At the time, atmospheric CO2 concentration was at a whopping 3000 to 9000 ppm! The average temperature wasn't much more than 10 degrees C above ... BER supports research into atmosphere carbon dioxide and other greenhouse gases. ... And about 30 percent of the carbon dioxide we produce has been captured by ... Aug 31, 2022 ... We hear about the overload of carbon dioxide in the atmosphere, but what percentage of this comes from human exhalation? Nick Canning. Nov 9, 2021 ... Molecule for molecule, methane is far more effective than CO2 at trapping heat in the atmosphere. Estimates of how much methane emissions ... Jun 26, 2023 ... The atmosphere is roughly 0.04% CO2, but humans have contributed about 33% of that, not 3%, since 1850.