What are the potential sources of CO2 in the atmospheres of exoplanets?

Apr 21, 2023 ... Carbon dioxide makes up only about 0.04% of the Earth's atmosphere, but that seemingly small figure ignores threat CO2 poses to the climate. The 30% increase in atmospheric CO2 during the 20th century boosted crop productivity by around 15 percent. Continued improvements in crop variety, fertilizer,. Jun 16, 2011 ... ... atmosphere while about 45 percent has stayed in the atmosphere. Eventually, the land and oceans will take up most of the extra carbon dioxide ... Feb 3, 2025 ... CO2 atmospheric dry molar fraction (ppmv), averaged over a calendar year Ice cores Mauna Loa 1800 1820 1840 1860 1880 1900 1920 1940 1960 ... Aug 8, 2016 ... It varies based on the individual and the study. Here is a very comprehensive study. Some excerpts: > Submarine crew are reported to be the ... Carbon dioxide occurs naturally in small amounts (about 0.04 percent) in the Earth's atmosphere. HUMANS BREATHE IT. Carbon dioxide is a minor part of the air ... Oct 5, 2021 ... “What matters for the atmosphere and the climate is cumulative CO2 emissions. ... Extending the analysis back to 1750 would add 0.1 percentage ... That's less than one percent of sea level pressure here. ... The deep cold southern polar winter removes CO2 gas from the atmosphere by freezing it directly onto ... Like other greenhouse gasses, CO2 traps heat in our atmosphere which leads ... percent higher than pre-industrial levels. Monthly mean carbon dioxide ... Jul 23, 2014 ... Human activities contribute approximately 3-4% of the total annual CO2 emissions. This might seem like a small percentage, but it is significant ...