جرف ثوايتس الجليدي في القارة القطبية الجنوبية يقترب من الانفصال

18 مايو، 2026

من إعداد الذكاء الاصطناعي

يفقد نهر ثوايتس الجليدي في القارة القطبية الجنوبية جرفه الجليدي الشرقي مع انتشار صدوع كبيرة عبر الهيكل العائم. ويهدد هذا التطور بتسريع تدفق النهر الجليدي والمساهمة في ارتفاع منسوب مياه البحار العالمية خلال العقود القادمة.

يغطي جرف ثوايتس الجليدي الشرقي حوالي 1500 كيلومتر مربع ويبلغ سمكه 350 متراً. وتظهر عمليات الرصد عبر الأقمار الصناعية أن الجرف يتشقق بسرعة حول نقطة تثبيته وعلى طول خط التماس حيث يلتقي النهر الجليدي بالبحر. وقد تضاعفت سرعات التدفق ثلاث مرات منذ يناير 2020 لتصل إلى ما يزيد قليلاً عن 2000 متر سنوياً بحلول يناير 2026، مع تسجيل تسارع إضافي في الأشهر التالية.

Pink rocks reveal hidden granite mass under Antarctic glacier

18 مارس، 2026 من إعداد الذكاء الاصطناعي صورة مولدة بواسطة الذكاء الاصطناعي

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.

Hektoria glacier sets modern record for rapid retreat

Antarctica's Hektoria Glacier lost 15 miles of length in just 15 months, marking the fastest retreat of grounded ice observed in modern times. The collapse unfolded between early 2022 and spring 2023 on the eastern Antarctic Peninsula.

Hektoria Glacier collapses rapidly in Antarctica

26 فبراير، 2026 من إعداد الذكاء الاصطناعي

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.

أوروبا

Scientists race to study vanishing Weißseespitze glacier

البيئة

Antarctic meltwater provides less iron than previously thought

البيئة

Scientists uncover origins of Antarctica's gravity anomaly

New evidence points to emerging tectonic rift in Zambia

Gases from hot springs in central Zambia show signs of mantle fluids rising to the surface, suggesting an early-stage continental rift. Researchers say this could mark the start of a new tectonic plate boundary. The findings come from samples collected in the Kafue Rift.

Atlantic ocean current weakening over two decades, study shows

10 مايو، 2026 من إعداد الذكاء الاصطناعي

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.

South Atlantic Anomaly expands dramatically since 2014

New data from the European Space Agency's Swarm satellites reveal that the South Atlantic Anomaly, a weak spot in Earth's magnetic field, has grown by nearly half the size of continental Europe since 2014. A region southwest of Africa is weakening even faster in recent years. This expansion highlights unusual activity in Earth's molten outer core.

Massive landslide triggers record tsunami in alaska fjord

6 مايو، 2026 من إعداد الذكاء الاصطناعي

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.

14 مايو 2026 07:37

جرف ثوايتس الجليدي في القارة القطبية الجنوبية يقترب من الانفصال

مقالات ذات صلة

Pink rocks reveal hidden granite mass under Antarctic glacier

Hektoria glacier sets modern record for rapid retreat

Hektoria Glacier collapses rapidly in Antarctica

Scientists race to study vanishing Weißseespitze glacier

Antarctic meltwater provides less iron than previously thought

Scientists uncover origins of Antarctica's gravity anomaly

New evidence points to emerging tectonic rift in Zambia

Atlantic ocean current weakening over two decades, study shows

South Atlantic Anomaly expands dramatically since 2014

Massive landslide triggers record tsunami in alaska fjord

Greenland ice melt may release vast methane stores

Study finds hidden channels speed Antarctic ice melt

Argentina enacts glacier law changes to allow mining near ice reserves

Scientists observe Juan de Fuca plate tearing in Cascadia subduction zone

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

Scientists identify 3,100 surging glaciers posing flood risks

AMOC collapse could release 640 billion tonnes of CO2

New study reveals origins of Antarctic Circumpolar Current

Warmer ocean drives Antarctic sea ice regime shift

Mantle plume shaped massive Atlantic underwater canyon

يستخدم هذا الموقع ملفات تعريف الارتباط