The first NASA spacecraft dedicated to studying carbon dioxide, A new study by NASA and the University of Carbon Dioxide for 20 major cities around the world provides the first direct satellite-based data.
That with a few important exceptions, decreases carbon dioxide per person because population density increases in a city.
The study also shows how satellite measurements of cities that emerge as strong greenhouse gases can provide new tools to track their carbon footprint and assess the impact of policy changes and infrastructure improvements on their energy efficiency.
Cities cause more than 70% of carbon dioxide emissions related to global energy, and rapid and progressive urbanization is increasing in number and size.
However, some densely populated cities emit more carbon dioxide per capita than others.
They calculated carbon dioxide emissions per capita in 20 urban areas on several continents based on the latest estimate of carbon dioxide from the NASA Orbiting Carbon Observatory-2 (OCO-2) satellite, which is operated by the agency’s mechanical laboratory, Pasadena, CA. The first NASA spacecraft dedicated to studying carbon dioxide.
Cities that cover a population density range are selected based on the quality and quantity of OCO-2 data available to them.
This approach can estimate emissions based on fuel (coal, oil, natural gas) and sectors (energy, transportation, production), but can lose some emissions, especially in rapidly developing urban areas.
Scientists have suggested that denser urban areas tend to emit less carbon dioxide per person because they are more energy efficient.
This means that in these areas, less energy is needed per person due to factors such as the use of public transportation and the efficient heating and cooling of apartment buildings.
Satellite data can increase our understanding of this relationship because it illustrates the combined emissions from all sources.
This information can be included in more bottom-up sources to help city administrators plan for more energy-efficient growth and develop better estimates for future carbon emissions.
However, OCO-2 data shows that not all densely populated urban areas have lower per capita emissions. Cities with large power plants such as Yinchuan, China, and Johannesburg have higher emissions than population density. The first NASA spacecraft dedicated to studying carbon dioxide.
“Some cities don’t produce as much carbon dioxide because of their population density, but they consume goods and services which would otherwise lead to carbon dioxide emissions.
The researchers show that more can be learned about urban carbon dioxide emissions.
They believe that new data from OCO-2’s successor, OCO-3, were launched at the International Space Station last year, and future space missions to monitor carbon dioxide can provide clues to possible solutions for the city’s carbon footprints.
Founded in 2014, OCO-2 captures global measurements of atmospheric carbon dioxide, the main driver of climate change, with the resolution, accuracy and reach needed to understand how it moves through the earth’s system and how it moves over time. change.
From a space perspective, OCO-2 takes around 100,000 measurements of atmospheric carbon dioxide around the world every day. JPL manages OCO-2 for NASA’s Science Mission Directorate in Washington. The first NASA spacecraft dedicated to studying carbon dioxide.
Although OCO-2 is not optimized for monitoring carbon emissions from cities or power plants, OCO-2 can monitor this target if it flies overhead or if the observatory repositioned itself to show its direction.
In contrast, OCO-3, which has been collecting daily carbon dioxide measurements since last summer, has a flexible mirror guide system that can be used to take photos.
In a matter of minutes, detailed mini-carbon dioxide maps can be made from areas of interest such as separate power plants to large metropolitan areas that cover up to 6,400 square kilometers such as the Los Angeles Pool, where OCO-2 will take several days.