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Warming temperatures are driving Arctic greening

As Arctic summers warm, Earth’s northern landscapes are changing. Using satellite images to track global tundra ecosystems over decades, a new study found the region has become greener, as warmer air and soil temperatures lead to increased plant growth.

‘A crazy year up north’: Arctic sea ice shrinks to 2nd-lowest level on record – USA TODAY

Sea ice is frozen ocean water that melts each summer, then refreezes each winter. “The year 2020 will stand as an exclamation point on the downward trend in Arctic sea ice extent.” Shrinking sea ice is just one of many…

Unexpected wildfire emission impacts air quality worldwide

During wildfires, nitrous acid plays a leading role — spiking to levels significantly higher than scientists expected, driving increased ozone pollution and harming air quality, according to a new study.

NASA’s IRIS spots nanojets: Shining light on heating the solar corona

Researchers report the first ever clear images of nanojets — bright thin lights that travel perpendicular to the magnetic structures in the solar atmosphere, called the corona — in a process that reveals the existence of one of the potential coronal heating candidates: nanoflares.

Southern hemisphere could see up to 30% less rain at end of the century

(Fundação de Amparo à Pesquisa do Estado de São Paulo) Analysis published in Scientific Reports is based on climate models for the mid-Pliocene period, which occurred 3 million years ago and shared characteristics with present-day warming.

Small asteroid will sweep close this week

Asteroid 2020 SW will sweep closest – closer than weather satellites – on September 24. It will not hit us. It’ll brighten as it draws near, but never enough to see with the eye alone. Charts here for telescope users.

A New York Clock That Told Time Now Tells the Time Remaining – The New York Times

For more than 20 years, Metronome, which includes a 62-foot-wide 15-digit electronic clock that faces Union Square in Manhattan, has been one of the city’s most prominent and baffling public art projects. Its digital display once told the time in…