Water mass distributions and transports for the 2014 GEOVIDE cruise in the North Atlantic
Water mass distributions and transports for the 2014 GEOVIDE cruise in the North Atlantic
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2014 年 GEOVIDE 北大西洋巡航的水体分布和运输
DOI：
10.5194/bg-15-2075-2018
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发表时间：
2017
期刊：
影响因子：
4.9
通讯作者：
P. Tréguer
中科院分区：
文献类型：
--
作者：
M. García‐Ibáñez;F. F. Pérèz;P. Lherminier;P. Zunino;H. Mercier;P. Tréguer
抽象。我们提出了在GEOVIDE巡航期间，沿沿着GEOTRACES-GA 01部分的水团分布，该巡航于2014年夏天穿越了亚极地北大西洋和拉布拉多海。从扩展的最佳多参数（eOMP）分析的水团结构提供了解释所观察到的微量元素及其同位素分布的框架。中央沃茨和次极地模式沃茨（SPMW）占GEOTRACES-GA 01剖面上部的主导地位。在中等深度，主要的水团是拉布拉多海水，而该部分的深层部分由冰岛-苏格兰溢流水（ISAW）和东北大西洋深水填充。我们还评估了整个2014年OVIDE线（葡萄牙格陵兰节）的水质量体积运输相结合的水质量分数从eOMP分析与绝对地转速度场估计通过箱逆模型。这使我们能够评估每个水团对整个截面运输的相对贡献。最后，我们讨论了2014年OVIDE线和2002-2010年平均状态之间水团分布和输送的变化。与2002-2010年相比，2014年在上层和中层水位，水团较冷的端元取代了较暖的端元，这与2000年代中期开始的北大西洋副极地环流的长期冷却一致。在2000毫巴以下，2014年ISOW的贡献相对于2002-2010年有所增加，这一增加与沿着58-59° N的ISOW输送的其他估计一致。我们还观察到2014年东格陵兰Irminger海流的SPMW相对于2002-2010年有所增加，这支持了Irminger海最近的深对流事件。通过对OVIDE线上大西洋经向翻转环流（AMOC）的相对水团贡献的评估，我们的结论是，2014年的AMOC强度比2002年更大，2010年平均值与AMOC上肢中央沃茨向北输送的增加以及AMOC中Irminger盆地SPMW和ISOW向南流动的增加有关下肢
Abstract. We present the distribution of water masses along the GEOTRACES-GA01 section during the GEOVIDE cruise, which crossed the subpolar North Atlantic Ocean and the Labrador Sea in the summer of 2014. The water mass structure resulting from an extended optimum multiparameter (eOMP) analysis provides the framework for interpreting the observed distributions of trace elements and their isotopes. Central Waters and Subpolar Mode Waters (SPMW) dominated the upper part of the GEOTRACES-GA01 section. At intermediate depths, the dominant water mass was Labrador Sea Water, while the deep parts of the section were filled by Iceland–Scotland Overflow Water (ISOW) and North-East Atlantic Deep Water. We also evaluate the water mass volume transports across the 2014 OVIDE line (Portugal to Greenland section) by combining the water mass fractions resulting from the eOMP analysis with the absolute geostrophic velocity field estimated through a box inverse model. This allowed us to assess the relative contribution of each water mass to the transport across the section. Finally, we discuss the changes in the distribution and transport of water masses between the 2014 OVIDE line and the 2002–2010 mean state. At the upper and intermediate water levels, colder end-members of the water masses replaced the warmer ones in 2014 with respect to 2002–2010, in agreement with the long-term cooling of the North Atlantic Subpolar Gyre that started in the mid-2000s. Below 2000 dbar, ISOW increased its contribution in 2014 with respect to 2002–2010, with the increase being consistent with other estimates of ISOW transports along 58–59° N. We also observed an increase in SPMW in the East Greenland Irminger Current in 2014 with respect to 2002–2010, which supports the recent deep convection events in the Irminger Sea. From the assessment of the relative water mass contribution to the Atlantic Meridional Overturning Circulation (AMOC) across the OVIDE line, we conclude that the larger AMOC intensity in 2014 compared to the 2002–2010 mean was related to both the increase in the northward transport of Central Waters in the AMOC upper limb and to the increase in the southward flow of Irminger Basin SPMW and ISOW in the AMOC lower limb.
影响因子：
4.1
作者：
Sijia Zou;S. Lozier;W. Zenk;A. Bower;W. Johns
通讯作者：
Sijia Zou;S. Lozier;W. Zenk;A. Bower;W. Johns
DOI：
10.1016/j.dsr2.2010.10.061
发表时间：
2011-09-01
影响因子：
3
作者：
Rhein, Monika;Kieke, Dagmar;Yashayaev, Igor
通讯作者：
Yashayaev, Igor