Abstract As part of the OSMOSIS project, a fleet of gliders surveyed the Porcupine Abyssal Plain site (Northeast Atlantic) from September 2012 to September 2013. Salinity, temperature, dissolved oxygen concentration and chlorophyll fluorescence were measured in the top 1000 m of the water column. Net community production (N) over an annual cycle using an oxygen-budget approach was compared to variations of several parameters (wind speed, mixing layer depth relative to euphotic depth, temperature, density, net heat flux) showing that the main theories (Critical Depth Hypothesis, Critical Turbulence Hypothesis, Heat-flux Hypothesis) can explain the switch between net heterotrophy to net autotrophy in different times of the year, The dynamics leading to an increase in productivity were related to shifts in regimes, such as the possible differences in nutrient concentration. The oxygen concentration profiles used for this study constitute a unique dataset spanning the entire productive season resulting in a data series longer than in previous studies. Net autotrophy was found at the site with a net production of (6.4 ± 1.9) mol m−2 in oxygen equivalents (or (4.3 ± 1.3) mol m−2 in carbon equivalents). The period exhibiting a deep chlorophyll maximum between 10 m and 40 m of depth contributed (1.5 ± 0.5) mol m−2 in oxygen equivalent to the total N. These results are greater than most previously published estimates.

中文翻译：

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2012-13 年在豪猪深渊平原（PAP；大西洋东北部）部署 Seaglider 的净社区氧气产量

摘要 作为 OSMOSIS 项目的一部分，一支滑翔机队于 2012 年 9 月至 2013 年 9 月对豪猪深海平原（东北大西洋）进行了勘测。测量了水柱顶部 1000 米的盐度、温度、溶解氧浓度和叶绿素荧光。 . 使用氧气预算方法将年度循环中的净群落产量 (N) 与几个参数（风速、混合层深度相对于透光深度、温度、密度、净热通量）的变化进行比较，表明主要理论（临界深度假说、临界湍流假说、热通量假说）可以解释一年中不同时间净异养向净自养之间的转换，导致生产力增加的动态与制度的变化有关，例如营养浓度的可能差异。用于本研究的氧气浓度分布构成了一个跨越整个生产季节的独特数据集，导致数据系列比以前的研究更长。在现场发现净自养，净产量为 (6.4 ± 1.9) mol m-2 氧当量（或 (4.3 ± 1.3) mol m-2 碳当量）。在 10 m 到 40 m 深度之间显示叶绿素最大值的时期贡献了 (1.5 ± 0.5) mol m-2 的氧气，相当于总 N。这些结果大于大多数先前公布的估计值。在现场发现净自养，净产量为 (6.4 ± 1.9) mol m-2 氧当量（或 (4.3 ± 1.3) mol m-2 碳当量）。在 10 m 到 40 m 深度之间显示叶绿素最大值的时期贡献了 (1.5 ± 0.5) mol m-2 的氧气，相当于总 N。这些结果大于大多数先前公布的估计值。在现场发现净自养，净产量为 (6.4 ± 1.9) mol m-2 氧当量（或 (4.3 ± 1.3) mol m-2 碳当量）。在 10 m 到 40 m 深度之间显示叶绿素最大值的时期贡献了 (1.5 ± 0.5) mol m-2 的氧气，相当于总 N。这些结果大于大多数先前公布的估计值。