Meddy, spiral arms, and mixing mechanisms viewed by seismic imaging in the Tagus Abyssal Plain (SW Iberia)
Meddy, spiral arms, and mixing mechanisms viewed by seismic imaging in the Tagus Abyssal Plain (SW Iberia)
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通过地震成像在塔霍深渊平原（伊比利亚西南部）观察到的麦迪、旋臂和混合机制
DOI：
10.1357/002224011799849309
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发表时间：
2011-07
影响因子：
0.5
通讯作者：
Teixeira Francisco Curado
中科院分区：
文献类型：
--
作者：
Song Haibin;Pinheiro Luis Menezes;Ruddick Barry;Teixeira Francisco Curado
水柱的地震成像是用来调查的相对作用的温盐侵入混合和搅拌（应变和剪切）中尺度涡在东北大西洋，在和周围的Meddy，并在沃茨之间的Meddy和葡萄牙海岸。这些图像显示，混合在核心内几乎不存在，但在顶部，底部和周围的前部区域非常高，正如以前通过常规手段发现的那样。在Meddy的外围，可以看到具有许多反射体的水带，这些反射体与温盐侵入体一致，并且具有非常高的混合率。我们认为，这些可能是“螺旋臂”的水，从Meddy周边的不稳定性或外部搅拌。梅迪和葡萄牙大陆坡之间的区域也被成像，显示出许多坡度相对较小的反射体，强度与梅迪周边发现的反射体相似。这与Smith和Ferrari（2009）对斜率为O（f/N）的单个薄层的预测相反，我们认为该区域的涡旋搅动产生了温盐锋面，这些锋面受到温盐入侵的影响。因此，级联的热方差微尺度耗散可能涉及的伙伴关系之间的涡流搅拌和温盐入侵。
Seismic imaging of the water column is used to investigate the relative roles of thermohaline intrusive mixing and stirring (straining and shearing) by mesoscale eddies in the NE Atlantic, in and around a Meddy, and in waters between the Meddy and the coast of Portugal. The images show that mixing is virtually absent within the core but anomalously high in the top, bottom, and surrounding frontal region, as previously found by conventional means. In the immediate periphery of the Meddy, bands of water with numerous reflectors consistent with thermohaline intrusions, and with anomalously high mixing rate can be seen. We suggest these may be “spiral arms” of water that was removed from the Meddy periphery by instability or external stirring. The region between the Meddy and the Portuguese continental slope was also imaged, and shows numerous reflectors with relatively small slope and strength similar to the reflectors found in the Meddy periphery. This is in contrast to the predictions of individual thin filaments of slope O (f/N) by Smith and Ferrari (2009), and we suggest that eddy stirring in this region produces thermohaline fronts that are acted upon by thermohaline intrusions. Therefore, the cascade of thermal variance to microscale dissipation could involve a partnership between eddy stirring and thermohaline intrusions.
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影响因子：
3.5
作者：
W. Smyth;B. Ruddick
通讯作者：
W. Smyth;B. Ruddick
影响因子：
1.3
作者：
M. McIntyre
通讯作者：
M. McIntyre
影响因子：
3.7
作者：
P. Othéguy;P. Billant;J. Chomaz
通讯作者：
P. Othéguy;P. Billant;J. Chomaz
DOI：
10.1002/cjg2.1151
发表时间：
2007-09
期刊：
Chinese Journal of Geophysics
影响因子：
--
作者：
Song Hai-bin;Wu Shiguo;Jiang Wei-wei
通讯作者：
Song Hai-bin;Wu Shiguo;Jiang Wei-wei
影响因子：
--
作者：
K. Richards;H. Banks
通讯作者：
K. Richards;H. Banks