تباطأ نظام تيار رئيسي في المحيط الأطلسي يعمل على تنظيم المناخ العالمي لما يقرب من 20 عاماً. وتقدم أبحاث جديدة أدلة مباشرة على هذا التراجع عبر مساحة واسعة من شمال المحيط الأطلسي.
قاد علماء من كلية روزنستيل لعلوم البحار والغلاف الجوي والأرض بجامعة ميامي هذه الدراسة. وقام الباحثون بتحليل بيانات من أربع مصفوفات مراقبة في قاع البحر تمتد من المناطق الاستوائية إلى خطوط العرض الوسطى. وقاست هذه الأجهزة الضغط ودرجة الحرارة والتيارات لتتبع تدفقات أعماق المحيط تحت مستوى 1000 متر.
New research shows that efforts to reduce air pollution in Europe, North America and East Asia could accelerate weakening of the Atlantic Meridional Overturning Circulation. The ocean current plays a key role in regulating Europe’s climate. Scientists used multiple climate models to assess the impact under continued high greenhouse gas emissions.
من إعداد الذكاء الاصطناعي
A patch of cooling ocean south-east of Greenland, known as the cold blob, is likely caused by a slowdown in the Atlantic Meridional Overturning Circulation, according to new research. The findings add to concerns about potential future climate impacts in Europe and beyond. Scientists remain divided on the exact causes.
Scientists forecast an 80 percent likelihood that an El Niño will form by September, with most models pointing to a moderate event. Some simulations indicate the possibility of a much stronger episode. Global warming is expected to intensify the effects of any such occurrence.
من إعداد الذكاء الاصطناعي
A team of Dutch scientists has presented simulations showing that a massive dam across the Bering Strait could help prevent the collapse of the Atlantic Meridional Overturning Circulation. The proposal was outlined at a major geoscience conference in Vienna this month.
Researchers have created the first global map showing how Earth's deepest mantle is deformed, primarily in regions where ancient subducted tectonic slabs reside. Using over 16 million seismograms, the team confirmed patterns predicted by geodynamic models. The findings, published in The Seismic Record, offer new insights into mantle flow near the core-mantle boundary.