How Ozone Levels Are Changing in Your City

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How Ozone Levels Are Changing in Your City

  • Published: Jul 31st, 2019

Ozone pollution can reach unhealthy levels in your city. Here’s how the number of unhealthy ozone days have changed over time.

Hotter Summers Mean More Stagnant Air

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Hotter Summers Mean More Stagnant Air

  • Published: Jul 24th, 2019

Hotter summers often lead to more stagnant air—trapping air pollutants that can cause health problems.

Nationwide Trends in Air Stagnation Since 1973

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Nationwide Trends in Air Stagnation Since 1973

  • Published: Jul 24th, 2019

Since NOAA’s Index began in 1973, the number of annual stagnant days has increased in 83% of the contiguous U.S. cities analyzed.

 2019 Global Temperature Anomalies Through June

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2019 Global Temperature Anomalies Through June

  • Published: Jul 18th, 2019

While U.S. temperatures have been relatively mild this year, the rest of the world has endured near-record heat.

2019 Global Temperatures Through June: Among Top 5 Hottest on Record

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2019 Global Temperatures Through June: Among Top 5 Hottest on Record

  • Published: Jul 18th, 2019

The past five years have been the hottest on record globally — and 2019 is on pace to continue that trend.

More Extremely Hot Days (2019)

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More Extremely Hot Days (2019)

  • Published: Jul 10th, 2019

Climate change is making summer scorchers all the more extreme—check the trend for area.

Daily Template: CO2 in the Context of Human History

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Daily Template: CO2 in the Context of Human History

  • Published: Jul 2nd, 2019

This image puts today’s CO2 levels in historical context. Spoiler alert: we’re off the charts.

Daily Template: The Rise of CO2

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Daily Template: The Rise of CO2

  • Published: Jul 2nd, 2019

CO2 has seasonal fluctuations but its stark, long-term rise is unmistakable.