Study looks at summer solstice effect on leaf senescence

In a warming climate, spring keeps getting earlier. But the timing of leaf fall in autumn has been more of a mystery. For the first time, a study by researchers including biologist Susanne Renner in Arts & Sciences at Washington ...

Strategic city planning can help reduce urban heat island effect

The tendency of cities to trap heat—a phenomenon called the "urban heat island," often referred to as the UHI effect—can lead to dangerous temperatures in the summer months, but new Penn State research published in Buildings ...

Arctic's peak ice cover has shrunk by an area larger than Egypt

Sea ice covered 5.64 million square miles of the Arctic Ocean at the ice's peak extent this year in early March. That's almost 400,000 square miles less than the median coverage level at other March peaks between 1981 and ...

Earth from Space: Santiago, Chile

Santiago lies in the center of Chile's most densely populated region, the Santiago Metropolitan Region, with a population around eight million, of which five million live in the city's urban area. Santiago is spread over ...

Vegetation regulates energy exchange in the Arctic

Global warming is changing the Arctic by causing permafrost thaw, glacier melt, droughts, fires and changes in vegetation. These developments are strongly linked to the energy exchange between land and the atmosphere. Researchers ...

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