Abstract. In the ocean, remineralisation rate associated with sinking particles is a crucial variable. Since the 90's, particulate biogenic barium (Ba_xs) has been used as an indicator of carbon remineralization by applying a transfer function relating Ba_xs to O₂ consumption (Dehairs's transfer function, Southern Ocean-based). Here, we tested its validity in the Mediterranean Sea (ANTARES / EMSO-LO) for the first time by investigating connections between Ba_xs, prokaryotic heterotrophic production (PHP) and oxygen consumption (JO₂-Opt; optodes measurement). We show that: (1) higher Ba_xs (409 pM; 100–500 m) in situations where integrated PHP (PHP100/500 = 0.90) is located deeper, (2) higher Ba_xs with increasing JO₂-Opt, and (3) similar magnitude between JO₂-Opt (3.14 mmol m⁻² d⁻¹; 175–450 m) and JO₂-Ba (4.59 mmol m⁻² d⁻¹; transfer function). Overall, Ba_xs, PHP and JO₂ relationships follow trends observed in the Southern Ocean. We believe that such transfer function could apply in the Mediterranean Sea with no restriction.

中文翻译：

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关于地中海中钡氧气消耗的关系：对中古海洋雪再矿化的影响

摘要。在海洋中，与沉没颗粒有关的再矿化率是一个关键变量。从90年代开始，通过应用将Ba _xs与O ₂消耗相关的传递函数（Dehairs的传递函数，基于南大洋洲），将颗粒状生物钡（Ba _xs）用作碳再矿化的指标。在这里，我们通过研究Ba _xs，原核异养产物（PHP）和耗氧量（JO ₂ -Opt;光电二极管测量）之间的联系，首次在地中海（ANTARES / EMSO-LO）中测试了其有效性。我们证明：（1）Ba _xs更高（409 PM; 100-500米）在集成PHP（PHP100 / 500 = 0.90）位于更深的情况下，（2）较高的Ba _XS随JO ₂ -OPT，和（3）之间JO相似的幅度₂ -OPT（ 3.14 mmol m ^-2  d ^-1； 175-450 m）和JO ₂ -Ba（4.59 mmol m ^-2  d ^-1；传递函数）。总体而言，Ba _xs，PHP和JO ₂关系遵循在南大洋观察到的趋势。我们认为，这种转移功能可以不受限制地适用于地中海。