El océano Ártico supera un punto de no retorno debido a la caída en los niveles de nitratos

28 de mayo de 2026

Reportado por IA

El océano Ártico cruzó un punto de no retorno alrededor de 2009, según un nuevo estudio que demuestra que la pérdida de hielo marino ha reducido drásticamente los niveles de nitratos en el agua.

Investigadores de la Universidad de Edimburgo analizaron más de 20 años de datos del estrecho de Fram. Descubrieron que el descenso de los nitratos comenzó a medida que el hielo marino retrocedía rápidamente, exponiendo las aguas poco profundas a más luz solar y acelerando un proceso llamado desnitrificación bentónica, que elimina este nutriente del agua marina.

Artículos relacionados

Warmer ocean drives Antarctic sea ice regime shift

New studies indicate that stronger winds and warming deep ocean water have triggered a sharp decline in Antarctic sea ice since 2016. Previously expanding, the ice reached a record high in 2014 before plummeting to record lows. Researchers link this shift to wind-driven upwelling of circumpolar deep water.

Diving robots uncover cause of Antarctica's sudden sea ice decline

18 de abril de 2026 Reportado por IA

Scientists using deep-diving Argo floats have pinpointed the reason behind Antarctica's dramatic sea ice contraction starting in 2016. The decline stems from a violent release of pent-up heat from ocean depths, triggered by shifting winds and salinity changes. This discovery highlights the ocean's key role in sea ice variability.

Ciencia

Cleaning up air pollution could weaken vital AMOC ocean current

Ciencia

Greenland ice melt may release vast methane stores

Ciencia

Study links Atlantic cold blob to weakening ocean currents

Study finds hidden channels speed Antarctic ice melt

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.

Scientists uncover ocean methane source tied to phosphate scarcity

16 de abril de 2026 Reportado por IA

Researchers at the University of Rochester have identified a key mechanism for methane production in the open ocean, driven by phosphate scarcity. The discovery, published in Proceedings of the National Academy of Sciences, suggests warming oceans could boost these emissions, creating a potential climate feedback loop. This resolves a long-standing puzzle about methane in oxygen-rich surface waters.

5 de junio de 2026 06:24