地球の気候を調節している大西洋の主要な海流システムが、20年近くにわたり減速していることが分かった。新たな研究により、北大西洋の広範囲にわたるこの減衰の直接的な証拠が示された。
マイアミ大学ローゼンスティール海洋大気地球科学大学院の研究チームがこの研究を主導した。研究チームは、熱帯から中緯度にかけて設置された4つの海底モニタリング装置から得られたデータを分析。これらの機器は、水深1,000メートル以深の深海流を追跡するため、圧力、水温、海流を測定した。
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.
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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.
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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.