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yexuqing木虫之王 (文学泰斗)
太阳系系主任
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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 海洋涡旋中常见的次表层热浪和冷浪 ▲ 作者：Qingyou He, Weikang Zhan et al. ▲ 链接：https://www.nature.com/articles/s41586-024-08051-2 ▲摘要：在此，我们提供了全球观测证据，证明中尺度涡旋在次表层热浪和冷浪的发生和增强中发挥了重要作用。我们发现，在深度100米以下测量到的80%的热浪和冷浪与表层情况不一致。与表层冷浪和海洋涡旋之间的弱联系相反，全球海洋中近三分之一的次表层热浪/冷浪、以及亚热带环流和中纬度主流系统中一半以上的此类事件发生在反气旋（气旋）涡旋中。 在过去的几十年里，这些与涡旋相关的极端温度以高于背景水平的速度加剧，这表明随着全球持续变暖，海洋涡旋对次表层热浪和冷浪的影响越来越大。 ▲ 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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