Gallery Section
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Frost Free Season is Getting Longer

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Frost Free Season is Getting Longer

All regions of the continental U.S. have seen the frost-free season, defined as the stretch between the last below-32°F reading in the spring and the first in the fall, grow longer.

Rising CO2 Increases the Size of Poison Ivy Plants

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Rising CO2 Increases the Size of Poison Ivy Plants

Better grab your calamine lotion. More CO2 means bigger poison ivy plants.

More CO2 = More Pollen

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More CO2 = More Pollen

Climate change has increased pollen counts and the length of the pollen season, trends that are expected to continue through mid-century.

Spring is Arriving Earlier in the U.S.

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Spring is Arriving Earlier in the U.S.

Spring is arriving earlier across the U.S. by an average of three days.

Fall Temperature & Rainfall Trends

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Fall Temperature & Rainfall Trends

A look at how both precipitation and temperature have changed this season since 1970.

Autumn is Falling Back

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Autumn is Falling Back

Foliage color and timing has been starting later, on average, in a warming world.

Longer Frost-Free Seasons

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Longer Frost-Free Seasons

Since 1970, much of the U.S. has seen the frost-free season get longer, on the backdrop of rising temperatures across the country.

Drought Comparison: 2012 vs. 2013

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Drought Comparison: 2012 vs. 2013

Sixty two percent of the country was in some level of drought last August, but that number has been reduced to 45 percent this August.