More Extreme Rain: Climate Extremes Index

This summer has brought flooding rainfall to several parts of the U.S. Pennsylvania had its wettest summer on record, and the neighboring states of Maryland, Virginia, and West Virginia each had one of their 10 wettest summers on record. The warming climate enhances the water cycle, leading to more extreme rainfall. The NCEI Climate Extremes Index

more

Fall Warming Trends Across the U.S.

Happy meteorological fall! This week, we examined the trends in average fall temperature across the U.S. Of the 244 cities analyzed, 80 percent have warmed at least 1°F in the last half-century, compared to only 1 percent which have cooled 1°F or more. The warming has been especially pronounced recently, as the last three falls have been within the

more

Smoke Wave Days in the Western U.S.

The U.S. has come a long way in cleaning up its air. The Clean Air Act of 1970 made air pollution catastrophes like the 1948 smog that killed nearly 40 people near Pittsburgh a distant memory. But while the air is much cleaner overall, smoke from wildfires is threatening the progress that’s been made, as particulate pollution from wildfires has

more

Mosquito Disease Danger Days

The number of days each year that are suitable for disease transmission by mosquitoes is rising in much of the U.S., as temperatures climb with climate change. This can increase the risk of mosquito-borne diseases such as Zika and West Nile. Following research from Stanford University, Climate Central analyzed the number of days in the spring,

more

More Warm Nights Across the U.S.

Our study analyzed the number of nights each year when the temperature remained above 65°F (for cities that rarely experience nights above 65°F, we chose 55°F), which is an engineering temperature standard for keeping buildings cool. In our analysis of 244 cities across the U.S., we found that 87 percent are having more of these warm nights since

more

Climate Indicators

Learn more about the 10 key indicators of a warming climate

10

Arctic Sea Ice

Ice has both ecological and economic benefits and its extent could influence weather around the world.

link

El Niño

El Niño is a warming of waters in the equatorial Pacific that influences global weather patterns.

link

Ocean Acidification

Acidifying oceans can hurt coral reefs and shellfish as well as the people that rely on them for their livelihoods.

link

Carbon Dioxide

CO2 is a potent greenhouse gas and plays a vital role in regulating Earth's surface temperature through radiative forcing and the greenhouse effect

link

Extreme Heat

Increasing frequency and magnitude of extreme heat can affect health, power usage and more.

link

Snow Cover

A shorter snow season increases the amount of sunlight absorbed by the Earth’s surface and can further warm the planet.

link

Sea Level Rise

Sea level rise could force millions to leave coastal areas and cost the world trillions of dollars.

link

Land Ice

Melting land ice contributes to sea level rise.

link

U.S. Wildfires

Wildfires damage forests and release CO2.

link

Global Temperature

The global temperature is the clearest measure of how human greenhouse gas emissions are affecting our planet.

link