El glaciar Hektoria establece un récord moderno de retroceso rápido

El glaciar Hektoria de la Antártida perdió 15 millas de longitud en solo 15 meses, lo que marca el retroceso de hielo apoyado en el lecho más rápido observado en los tiempos modernos. El colapso tuvo lugar entre principios de 2022 y la primavera de 2023 en el este de la Península Antártica.

El rápido retroceso del glaciar comenzó después de que el colapso de la plataforma de hielo Larsen B en 2002 eliminara una barrera estabilizadora. En enero de 2022, el hielo marino adherido a la costa en la bahía se fragmentó, lo que permitió que la lengua de hielo flotante se desprendiera repetidamente durante el verano austral y retrocediera aproximadamente 16 kilómetros. El glaciar se estabilizó brevemente durante el invierno de 2022, pero continuó adelgazándose bajo la superficie.

Artículos relacionados

Pink granite boulders in Antarctica's Hudson Mountains revealing a massive hidden granite body under Pine Island Glacier, with scientific survey overlay.
Imagen generada por IA

Pink rocks reveal hidden granite mass under Antarctic glacier

Reportado por IA Imagen generada por IA

Bright pink granite boulders on Antarctica's Hudson Mountains have unveiled a massive buried granite body beneath Pine Island Glacier. The structure measures nearly 100 km wide and 7 km thick. Researchers linked the rocks, dated to 175 million years ago, to this subglacial feature using gravity surveys.

In 2023, Hektoria Glacier on Antarctica's Eastern Peninsula retreated eight kilometers in just two months, marking the fastest such event recorded. Nearly half of the glacier broke apart due to its position over a flat underwater bedrock. The discovery, detailed in a new study, highlights vulnerabilities in other Antarctic ice features.

Reportado por IA

Antarctica’s Thwaites glacier is losing its eastern ice shelf as large fractures spread across the floating structure. The development threatens to speed up the glacier’s flow and add to global sea levels over coming decades.

Scientists have determined that Earth's most powerful ocean current, the Antarctic Circumpolar Current, formed through shifting continents and strong winds rather than solely from opening ocean gateways. This development around 34 million years ago helped draw down atmospheric carbon dioxide, contributing to a global cooling that led to the Antarctic Ice Sheet. The findings come from climate simulations published in the Proceedings of the National Academy of Sciences.

Reportado por IA

A huge landslide in Alaska's Tracy Arm fjord on 10 August 2025 generated the second-largest tsunami ever recorded, with waves reaching 481 metres high. The event displaced 64 million cubic metres of rock and created a 5.4 magnitude seismic signal.

Scientists have detected traces of iron-60 in Antarctic ice up to 80,000 years old, showing that the solar system is moving through material from an ancient stellar explosion. The findings come from a study published in Physical Review Letters and point to the Local Interstellar Cloud as the source of the radioactive isotope.

Reportado por IA

A new analysis in Geophysical Research Letters shows Earth warming at ~0.36°C per decade since 2014—about double the prior rate of 0.18°C per decade—with 98% confidence after accounting for natural factors. Led by Stefan Rahmstorf, the study warns the Paris Agreement's 1.5°C limit could be breached by 2028, amid debates over short-term trends and data uncertainties.

 

 

 

Este sitio web utiliza cookies

Utilizamos cookies para análisis con el fin de mejorar nuestro sitio. Lee nuestra política de privacidad para más información.
Rechazar