A warm jet in a cold ocean.
A warm jet in a cold ocean.
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DOI：
10.1038/s41467-021-22505-5
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发表时间：
2021-04-23
影响因子：
16.6
通讯作者：
Wood KR
中科院分区：
文献类型：
--
作者：
MacKinnon JA;Simmons HL;Hargrove J;Thomson J;Peacock T;Alford MH;Barton BI;Boury S;Brenner SD;Couto N;Danielson SL;Fine EC;Graber HC;Guthrie J;Hopkins JE;Jayne SR;Jeon C;Klenz T;Lee CM;Lenn YD;Lucas AJ;Lund B;Mahaffey C;Norman L;Rainville L;Smith MM;Thomas LN;Torres-Valdés S;Wood KR
前所未有的热量正通过白令海峡进入北冰洋的太平洋部分，特别是在夏季。虽然在秋季降温期间，一些热量会流失到大气中，但进入的温暖咸水中有很大一部分会潜到较冷的近地表水层之下，随后延伸数百公里进入博福特环流。这些次表层热量的向上湍流混合可能加速了该地区的海冰融化。这种源自太平洋的水带来了热量和独特的地球化学性质，有助于改变北极生态系统。然而，我们理解或预测这一进入的水团的作用的能力受到了阻碍，因为我们对控制这一温水的俯冲和演变的物理过程缺乏了解。至关重要的是，这里看到的过程发生在小的水平尺度上，无法通过区域预报模型或气候模拟来解决;必须开发新的参数化来准确地代表物理学。在这里，我们提出了新的高分辨率观测显示的详细过程中的俯冲和最初的演变温暖的太平洋起源的水在南部博福特环流。海水变暖在加速北极海冰融化方面起着重要作用。本文详细介绍了起源于太平洋的暖水进入北冰洋并潜入北冰洋表层的观测资料，并探讨了其演变的动力学过程。
Unprecedented quantities of heat are entering the Pacific sector of the Arctic Ocean through Bering Strait, particularly during summer months. Though some heat is lost to the atmosphere during autumn cooling, a significant fraction of the incoming warm, salty water subducts (dives beneath) below a cooler fresher layer of near-surface water, subsequently extending hundreds of kilometers into the Beaufort Gyre. Upward turbulent mixing of these sub-surface pockets of heat is likely accelerating sea ice melt in the region. This Pacific-origin water brings both heat and unique biogeochemical properties, contributing to a changing Arctic ecosystem. However, our ability to understand or forecast the role of this incoming water mass has been hampered by lack of understanding of the physical processes controlling subduction and evolution of this this warm water. Crucially, the processes seen here occur at small horizontal scales not resolved by regional forecast models or climate simulations; new parameterizations must be developed that accurately represent the physics. Here we present novel high resolution observations showing the detailed process of subduction and initial evolution of warm Pacific-origin water in the southern Beaufort Gyre. Warming ocean water plays a significant role in accelerating Arctic sea ice melt. Here the authors present detailed observations of warm water of Pacific origin entering and diving beneath the Arctic ocean surface, and explore the dynamical processes governing its evolution.
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DOI：
10.1016/j.dsr2.2020.104781
发表时间：
2020-07-01
影响因子：
3
作者：
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