A way of distinguishing between natural carbon dioxide emissions and those from burning fossil fuels could help cities and countries monitor their progress in cutting emissions
A way of directly measuring the carbon dioxide released by burning fossil fuels could help cities and countries monitor their efforts to reduce emissions in near real time.
Measuring fossil fuel emissions directly would help confirm the accuracy of these inventory-based estimates and reveal more quickly if emission-reduction policies are working or not. It could also enable us to track how much specific regions or cities are emitting. So, while the long-term global rise in atmospheric CO2 due to human activity – from around 280 parts per million before the industrial revolution toResearchers have tried various ways of directly measuring fossil fuel emissions. One is to determine what proportion of CO2 is in the form of the radioactive isotope carbon-14, which isn’t found in fossil fuels because it decays over time, and oil and gas supplies are millions of years old.
The researchers used measurements taken at the Weybourne Atmospheric Observatory on the Norfolk coast to calculate emissions from the southern UK since 2020. They used machine learning to estimate how changes in weather and wind direction affect oxygen and CO2 levels in the area.The team was able to detect falls in fossil fuel emissions during the first and second covid-19 lockdowns in England. “Covid has been a great example of a quite sudden, abrupt change,” says Pickers.
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