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yexuqing木蟲之王 (文學(xué)泰斗)
太陽系系主任
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[交流]
Common occurrences of subsurface heatwaves and cold spells in ocean eddies
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Common occurrences of subsurface heatwaves and cold spells in ocean eddies 海洋渦旋中常見的次表層熱浪和冷浪 ▲ 作者：Qingyou He, Weikang Zhan et al. ▲ 鏈接：https://www.nature.com/articles/s41586-024-08051-2 ▲摘要：在此，我們提供了全球觀測證據(jù)，證明中尺度渦旋在次表層熱浪和冷浪的發(fā)生和增強(qiáng)中發(fā)揮了重要作用。我們發(fā)現(xiàn)，在深度100米以下測量到的80%的熱浪和冷浪與表層情況不一致。與表層冷浪和海洋渦旋之間的弱聯(lián)系相反，全球海洋中近三分之一的次表層熱浪/冷浪、以及亞熱帶環(huán)流和中緯度主流系統(tǒng)中一半以上的此類事件發(fā)生在反氣旋（氣旋）渦旋中。 在過去的幾十年里，這些與渦旋相關(guān)的極端溫度以高于背景水平的速度加劇，這表明隨著全球持續(xù)變暖，海洋渦旋對次表層熱浪和冷浪的影響越來越大。 ▲ Abstract：Here we present global observational evidence for the important role of mesoscale eddies in the occurrence and intensification of subsurface MHWs and MCSs. We found that 80% of measured MHWs and MCSs below a depth of 100 m do not concur with surface events. In contrast to the weak link between surface MHWs (MCSs) and ocean eddies, nearly one-third of subsurface MHWs (MCSs) in the global ocean, and more than half of such events in subtropical gyres and mid-latitude main current systems, occur within anticyclonic (cyclonic) eddies. These eddy-associated temperature extremes have intensified at rates greater than background level in past decades, suggesting a growing impact of ocean eddies on subsurface MHWs and MCSs with ongoing global warming. |
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