Hydrography above the Mid-Atlantic Ridge (33°-40°N) and within the Lucky Strike segment
Cara Wilson, Kevin Speer, Jean-Luc Charlou, Henri Bougault and Gary Klinkhammer
Journal of Geophysical Research, 100: 20,555-20,564, 1995
As part of the French-American Ridge Atlantic program the French-American ZAPS and Rocks (FAZAR) cruise conducted water column studies between 33° - 40°N along the Mid-Atlantic Ridge (MAR) to detect hydrothermal activity and map its influence. This paper describes the large-scale hydrography within the axial valley, with particular emphasis on the hydrothermally active Lucky Strike segment (37°17'N). The FAZAR study area is affected by the presence of the Azores Current and Mediterranean Water (MW). Although the MW core has been mapped as far north as 50°N off the ridge, within the MAR the northern boundary of the MW exists as a strong front south of the Azores platform. This front is most likely caused by the shallower ridge crest becoming a physical barrier to the MW. The Lucky Strike segment lies within this front and, as a result, has complicated hydrography which can obscure hydrothermal temperature and salinity anomalies.
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