How do we know our carbon emissions?

TL;DR

Satellites can detect carbon emissions from space, allowing for the tracing of changes in carbon dioxide concentration and the identification of the source of carbon emissions.

Transcript

imagine if it's not too much of a stretch of the imagination a world in which carbon is building up in the atmosphere but in this world nobody wants to own up to emitting that carbon governments swear they don't emit anything into the atmosphere so they came to me the most available atmospheric detective in town how do you trace an invisible gas a ... Read More

Key Insights

• 👻 Satellites can measure CO2 concentrations in the atmosphere, allowing for the tracking of carbon emissions from different sources.
• 🧑‍🔬 By running atmospheric models in reverse, scientists can identify the origin of carbon emissions and track their movement over time.
• 🫢 Satellite data is crucial for validating countries' reported emissions and ensuring accurate greenhouse gas inventory reporting.
• 💱 Tracing carbon emissions helps assess the impact of human activities on climate change and develop effective emission reduction strategies.
• 🔨 Hindcasting is a valuable tool for determining historical emissions and comparing them with reported numbers.
• 🛰️ The European Space Agency (ESA) and other agencies have constellations of satellites monitoring the planet to gather data on carbon emissions.
• 😫 Satellite data can be used to assess trends in emission reduction goals set by countries under the Paris Agreement.

Questions & Answers

Q: How do satellites detect carbon emissions?

Satellites measure the concentration of CO2 in the atmosphere by observing changes in the absorption of long wavelengths of light as it passes through the air. This data can then be used to estimate the total amount of CO2 in a given column of air.

Q: Why is it important to trace the origin of carbon emissions?

Tracing the origin of carbon emissions helps identify the sources of greenhouse gas emissions, whether they are anthropogenic or natural. This information is crucial for understanding the impact of human activities on climate change and creating effective emission reduction strategies.

Q: How can satellite data validate countries' reported emissions?

By comparing a country's reported emissions with the calculated emissions from satellite data, scientists can determine if there are discrepancies. If the numbers differ significantly, it suggests that the country's estimation methods may need improvement.

Q: What role do atmospheric models play in carbon emission tracking?

Atmospheric models are used to run hindcasts, where CO2 concentration data is inputted to determine the historical emissions that led to those concentrations. This helps identify the regions or countries responsible for the emissions.

Summary & Key Takeaways

• Satellites, operated by agencies like the European Space Agency (ESA), can detect carbon emissions by measuring carbon dioxide (CO2) concentrations in different parts of the atmosphere.

• By running atmospheric models in reverse, known as hindcasting, scientists can determine the origin of carbon emissions and track their movement over time.

• This satellite technique is important for validating countries' reported emissions and ensuring accuracy in greenhouse gas inventory reporting.