What are the isotopic signatures of CO2 from different sources (e.g., volcanoes, respiration, fossil fuels)?

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 ... 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. These studies suggest that approximately 95% of atmospheric CO2 is natural. Jun 16, 2024 ... ... carbon dioxide (CO2) from the atmosphere ... The ocean absorbs about 30 percent of the CO2 that is released in the atmosphere, and as ... 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 ... Sep 4, 2020 ... The ocean is a sink for ~25% of the atmospheric CO2 emitted by human activities, an amount in excess of 2 petagrams of carbon per year (PgC ... This graph shows rising levels of carbon dioxide (CO2) in the atmosphere ... Mussels and oysters are expected to grow less shell by 25 percent and 10 percent ... Net zero refers to a state in which the greenhouse gases going into the atmosphere are balanced by removal out of the atmosphere. ... carbon dioxide (CO2). Mar 22, 2021 ... Records derived from ice core measurements show that the average global CO2 concentration in the atmosphere for 1750 to 1800 was around 278ppm. Jan 15, 2025 ... The average global atmospheric CO₂ concentration has increased by almost 20 percent since 1990, and set a record high in 2022.