Kelvin-Helmholtz billow intensity determines effect on pelagic ecosystems in the Kuroshio

Echo sounder images revealed weak and strong Kelvin-Helmholtz (KH) billow conditions produced over a seamount along the Kuroshio in two separate surveys. This dataset includes CTD information, and chlorophyll a and nitrate profiles used for the analyses needed to describe the effects of varying KH billow intensities on pelagic ecosystems in the Kuroshio. Vertical profiles of temperature, nitrates and chlorophyll a were plotted, using Surfer 13, for a time-series survey over K seamount and along two transects surveyed during each cruise. KH billows in the ocean appear to contribute to the vertical transport of nutrients, which promotes chlorophyll a production. Shallow billows, regardless of vertical scale seem to contribute to subsurface chlorophyll production by entrainment of ambient dissolved inorganic nutrients. Deeper billows, on the other hand, have a more direct role in resuspending materials from the seafloor.回声测深仪（Echo sounder）图像显示，在两次独立科考调查中，黑潮（Kuroshio）海域的一座海山上方形成了强度不一的开尔文-亥姆霍兹（Kelvin-Helmholtz, KH）涡旋。本数据集包含温盐深仪（CTD）观测数据，以及用于分析黑潮海域不同KH涡旋强度对远洋生态系统影响所需的叶绿素a与硝酸盐剖面数据。借助Surfer 13绘图软件，我们针对两次航次中K海山上方的时间序列调查数据，以及沿两条调查断面获取的数据，绘制了温度、硝酸盐与叶绿素a的垂直剖面。海洋中的KH涡旋可促进营养盐的垂直输送，进而提升叶绿素a的合成水平。无论垂直尺度大小，浅层涡旋均通过卷夹周围环境中的溶解态无机营养盐，助力次表层叶绿素的生成。相较而言，深层涡旋则更直接地参与海底物质的再悬浮过程。