A pilot project has estimated emissions and removals of carbon dioxide in individual nations using satellite measurements<\/p>\n\n\n\n
A NASA Earth-observing satellite has helped researchers track\u00a0carbon dioxide<\/a>\u00a0emissions for more than 100 countries around the world. The pilot project offers a powerful new look at the carbon dioxide being emitted in these countries and how much of it is removed from the atmosphere by forests and other carbon-absorbing “sinks” within their borders. The findings demonstrate how space-based tools can support insights on Earth as nations work to achieve\u00a0climate goals<\/a><\/p>\n\n\n\n The international study, published in\u00a0Earth System Science Data<\/em>\u00a0and conducted by more than 60 researchers, used measurements made by NASA’s Orbiting Carbon Observatory-2 (OCO-2) mission, as well as a network of surface-based observations, to quantify increases and decreases in atmospheric carbon dioxide concentrations from 2015 to 2020. Using this measurement-based (or “top-down”) approach, the researchers were then able to infer the balance of how much carbon dioxide was emitted and removed<\/p>\n\n\n\n Although the OCO-2 mission was not specifically designed to estimate emissions from individual nations, the findings from the 100-plus countries come at an opportune time. The first Global Stocktake\u2014a process to assess the world’s collective progress toward limiting global warming, as specified in the 2015 Paris Agreement\u2014takes place in 2023<\/p>\n\n\n\n