Hot days are expected to increase across the country with climate change. The team found a less robust connection with heat, though a correlation existed. in the coming years, this result suggests uneven air pollution distribution could worsen in these regions, too, if actions to reduce emissions are not taken. Because air stagnation is expected to increase in the northeastern and southwestern U.S. Although the analysis is not yet complete, the team has so far found a direct connection between stagnant air and uneven pollution distribution, which was not surprising to the team because winds disperse pollution. In these cities, as in New York City and Newark, the researchers also analyzed the data to see whether they could identify any links with wind and heat-both factors that are expected to change as the world warms. Washington, D.C., had the lowest disparity, with an average of 10% higher levels in Black, Hispanic and Asian communities in low-income tracts. They experienced an average of 38% higher levels of pollution than their non-Hispanic white, higher SES counterparts in the same city –– although disparities on some days were much higher. A preliminary analysis found the highest average disparity in Los Angeles for Black, Hispanic and Asian communities in the lowest socioeconomic status (SES) tracts. The cities are: Atlanta, Baltimore, Chicago, Denver, Houston, Kansas City, Los Angeles, Phoenix, Seattle, St. Now, they have analyzed satellite-based data for 11 additional cities, aside from New York City and Newark, for daily variations. In a proof-of-concept project, they used this approach to analyze initial disparities in Houston, and later applied these data-gathering methods to study daily disparities over New York City and Newark, New Jersey. They analyzed these data across small geographic regions, called census tracts, that are defined by the U.S. The team has been using data on NO 2 collected almost daily by a space-based instrument known as TROPOMI, which they confirmed with higher resolution measurements made from a similar sensor on board an airplane flown as part of NASA's LISTOS project. Inhaling elevated levels of NO 2 over the long term can also contribute to the development of asthma. But it's not just a proxy-exposure to high concentrations of this gas can irritate the airways and aggravate pulmonary conditions. To get a sense of air pollution levels, scientists often look to NO 2. Pusede's research focuses on the gas NO 2, which is a component of the complex brew of potentially harmful compounds produced by combustion. On weekends, more than half of such trucks are parked. Their analysis tied this drop to the reduction of deliveries by diesel-fueled trucks.
For instance, in research reported last year, Pusede and colleagues at the University of Virginia found that disparities in air quality across major U.S. Information about these fluctuations can help pinpoint sources of pollution.
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