Engineers use feedback loops — typically negative feedback is more useful, but positive feedback is needed for oscillators. Negative feedback in an amplifier circuit, which has a negative loop gain, ...

More crevasse activity could lead to positive feedback loop threatening Greenland glacier's stability. In just five years, 930 million cubic meters of crevasses opened up in the Greenland ice sheet, ...

Researchers have shown that weathering of rocks in the Canadian Arctic will accelerate with rising temperatures, triggering a positive feedback loop that will release more and more carbon dioxide to ...

Earth’s top 2 meters (6 feet) of soil hold 2.5 trillion metric tons of carbon — more than is held in living vegetation and the atmosphere combined. But soil carbon sinks are under threat — global ...