The Arctic Ocean crossed a tipping point around 2009, according to a new study showing that sea ice loss has sharply reduced nitrate levels in the water.
Researchers from the University of Edinburgh analyzed more than 20 years of data from Fram Strait. They found that the decline in nitrate began as sea ice retreated rapidly, exposing shallow waters to more sunlight and accelerating a process called benthic denitrification that removes the nutrient from seawater.
A new study shows that extreme pressure in the deep sea forces nutrients from sinking particles, giving microbes an unexpected food source. Researchers at the University of Southern Denmark led the work, which was published in Science Advances.
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A major Atlantic Ocean current system that regulates global climate has been slowing down for nearly 20 years. New research provides direct evidence of the decline across a wide area of the North Atlantic.
A new study shows that channels beneath Antarctic ice shelves can trap warm ocean water and accelerate melting from below. Researchers focused on the Fimbulisen Ice Shelf in East Antarctica and found that this process may make even cold regions more vulnerable. The findings suggest current climate models could underestimate future sea level rise.
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Antarctica’s west coast is missing an area of winter sea ice the size of France. Temperatures have climbed up to 45 degrees Fahrenheit above normal, stopping ice from forming in the dead of Antarctic winter.