A Polar Surface Eddy Obscured by Thermal Stratification
A Polar Surface Eddy Obscured by Thermal Stratification
复制标题
被热分层遮蔽的极地表面涡流
DOI：
10.1029/2019gl086281
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发表时间：
2020
影响因子：
5.2
通讯作者：
Porter M
中科院分区：
文献类型：
--
作者：
Porter M
中尺度和次中尺度涡旋在全球海洋热量和地球化学性质的分布中起着重要的作用。这种涡旋在北冰洋很重要，特别是在锋面区域，但很难使用传统的基于卫星的方法进行检测。在这里，我们使用来自水下滑翔机的高分辨率原位数据来识别从遥感观测中被掩盖的表面涡流。我们假设，这种掩蔽是由表面热通量驱动的热分层驱动的。这个漩涡很可能是在极锋以北产生的，然后穿过锋面向南移动。我们估计观测到的涡旋含有4 × 1010 m3的北极水。这个漩涡的观测，掩盖在卫星观测的海洋表面温度，表明历史低估的流行和重要性的漩涡在这个关键的混合区。巴伦支海是北极圈海域之一，其水柱结构看似简单。在南部，温暖的大西洋水占主导地位;在北部，寒冷的北极水占主导地位;而在它们的边界，北极水覆盖着大西洋水。在夏季，北极水域基本上缺乏浮游植物生长所需的营养物质，而浮游植物是维持海洋生命的关键。相比之下，大西洋水是进入北极的营养丰富的水的主要来源之一。在这项研究中，我们使用水下机器人仪器来识别从巴伦支海北极部分流入大西洋部分的一片北极水。这片水域被认为比周围水域的浮游植物浓度低。由于大气加热的表面，这一补丁将无法区分从周围的大西洋水，因此将缺席卫星观测海面温度。我们认为，这种温度掩盖意味着我们以前低估了有多少水在北极海的这些补丁内移动。
Mesoscale and submesoscale eddies play an important role in the distribution of heat and biogeochemical properties throughout the global oceans. Such eddies are important in the Arctic Ocean, particularly in the frontal regions, but are difficult to detect using traditional satellite‐based methods. Here we use high‐resolution in situ data from an underwater glider to identify a surface eddy that was masked from remote‐sensing observations. We hypothesize that this masking was driven by thermal stratification driven by surface heat fluxes. The eddy was likely generated north of the Polar Front, before crossing the front and traveling south. We estimate that the observed eddy contained 4 × 1010m3of Arctic Water. The observation of this eddy, masked in satellite observations of sea surface temperature, suggests a historical underestimation of the prevalence and importance of eddies in this key mixing region. The water column of the Barents Sea, one of the circumpolar Arctic seas has a seemingly simple structure. In the south, warm Atlantic Water dominates; in the north, cold Arctic Water dominates; while at their boundary, the Arctic Water overlies the Atlantic Water. In the summer, the Arctic Water is largely devoid of the nutrients required to fuel the growth of phytoplankton, which is key to maintaining life in the ocean. In contrast, the Atlantic Water is one of the primary sources of nutrient‐rich water into the Arctic. In this study, we have used an underwater robotic instrument to identify a patch of Arctic Water which has been shed from the Arctic sector of the Barents Sea into the Atlantic sector. This patch of water is seen to have lower phytoplankton concentrations than the surrounding water. Due to atmospheric heating of the surface, this patch would be indistinguishable from the surrounding Atlantic Water and so would be absent for satellite observations of sea surface temperature. We suggest that this temperature masking has meant that we have previously underestimated how much water is moved within these patches in the Arctic seas.
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巴伦支海极锋现场和遥感数据中叶绿素a浓度的“闪光”
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
V. Kushnir;V. Pavlov;A. Morozov;O. Pavlova
通讯作者：
O. Pavlova
影响因子：
3.5
作者：
Itoh, Sachihiko;Yasuda, Ichiro
通讯作者：
Yasuda, Ichiro
影响因子：
3.6
作者：
Harris, CL;Plueddemann, AJ;Gawarkiewicz, GG
通讯作者：
Gawarkiewicz, GG
边缘冰区和巴伦支海中部水文、营养物和叶绿素 a 的变化
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
M. Reigstad;P. Wassmann;C. W. Riser;Sigrid Øygarden;F. Rey
通讯作者：
F. Rey
旋风涡流和横向混合
DOI：
10.1017/s0025315400056885
发表时间：
1978
影响因子：
1.2
作者：
R. Pingree
通讯作者：
R. Pingree