Norra ishavet passerade en brytpunkt omkring 2009, enligt en ny studie som visar att förlusten av havsis har minskat nitratnivåerna i vattnet kraftigt.
Forskare från University of Edinburgh analyserade mer än 20 års data från Framsträdet. De fann att minskningen av nitrat började när havsisen drog sig tillbaka snabbt, vilket exponerade grunda vatten för mer solljus och accelererade en process som kallas bentisk denitrifikation, vilken avlägsnar näringsämnet från havsvattnet.
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.