The Atlantic Water boundary current in the Nansen Basin: Transport and mechanisms of lateral exchange
The Atlantic Water boundary current in the Nansen Basin: Transport and mechanisms of lateral exchange
复制标题
南森盆地大西洋水边界流：输送和横向交换机制
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
A. Proshutinsky
中科院分区：
文献类型：
--
作者：
K. Våge;R. Pickart;V. Pavlov;Peigen Lin;D. Torres;R. Ingvaldsen;A. Sundfjord;A. Proshutinsky
利用北冰洋南森海盆30°E附近的一次船载水文调查资料，研究了大西洋边界流的结构和输运。两个高分辨率的天气交叉的电流表明，它是大约30公里宽，弱中深度加强。使用先前确定的大西洋水的定义，计算出该水团的输送量为1.6 ± 0.3 Sv，这与西斯匹次卑尔根海流内分支中大西洋水的输送量相似。在调查的时候，一个小的反气旋涡流的大西洋水位于近海的边界电流。数据表明，该功能是最近从边界流分离，并且，由于补偿效应的温度和盐度的热风切变，最大的漩涡速度位于水文属性核心以下。在我们的研究领域内检测到其他两个类似的功能，这表明这些涡流是常见的，并代表了一种有效的手段，从边界电流流入内部的温暖和咸的水。一个大气低气压系统过境我们的研究区域南部导致东南风之前和期间的实地测量。比较水文数据从太平洋水边界电流在加拿大盆地类似的大气强迫下表明，上升流发生在调查期间。这提供了与南森盆地这一区域的热盐跨流交换有关的第二种机制。本文受版权保护。All rights reserved.
Data from a shipboard hydrographic survey near 30°E in the Nansen Basin of the Arctic Ocean are used to investigate the structure and transport of the Atlantic Water boundary current. Two high-resolution synoptic crossings of the current indicate that it is roughly 30 km wide and weakly mid-depth intensified. Using a previously-determined definition of Atlantic Water, the transport of this water mass is calculated to be 1.6 ± 0.3 Sv, which is similar to the transport of Atlantic Water in the inner branch of the West Spitsbergen Current. At the time of the survey a small anti-cyclonic eddy of Atlantic Water was situated just offshore of the boundary current. The data suggest that the feature was recently detached from the boundary current, and, due to compensating effects of temperature and salinity on the thermal wind shear, the maximum swirl speed was situated below the hydrographic property core. Two other similar features were detected within our study domain, suggesting that these eddies are common and represent an effective means of fluxing warm and salty water from the boundary current into the interior. An atmospheric low pressure system transiting south of our study area resulted in southeasterly winds prior to and during the field measurements. A comparison to hydrographic data from the Pacific Water boundary current in the Canada Basin under similar atmospheric forcing suggests that upwelling was taking place during the survey. This provides a second mechanism related to cross-stream exchange of heat and salt in this region of the Nansen Basin. This article is protected by copyright. All rights reserved.
影响因子：
3.6
作者：
Aksenov, Yevgeny;Ivanov, Vladimir V.;Beszczynska-Moeller, Agnieszka
通讯作者：
Beszczynska-Moeller, Agnieszka