The phrase "atmospheric composition" refers to the gases and particles that make up the air around us. It includes elements like oxygen, nitrogen, carbon dioxide, water vapor, and pollutants. Full definition
This inertia implies that there is additional climate change «in the pipeline» even without further change of atmospheric composition. (journals.plos.org)
However, overall sensitivities of lifetime to changes in atmospheric composition vary widely from model to model. (link.springer.com)
It will allow researchers to assess whether a planet is habitable or not based on atmospheric composition. (bigthink.com)