Systematic regional variations in the ratio of nutrient depth gradients of dissolved inorganic carbon (ΔDIC):nitrate (ΔNO₃):phosphate (ΔPO₄) in the upper layer (300 m) of the Pacific Ocean are observed. Regional variations in the ΔDIC/ΔNO₃/ΔPO₄ are primarily the result of three processes, that is, the C/N/P of organic matter (OM) being exported and subsequently degraded, nitrogen fixation, and air-sea CO₂ gas exchange. The link between the observed dissolved ΔDIC/ΔNO₃/ΔPO₄ and the C/N/P of exported OM is established using surface layer dissolved DIC, NO₃, and PO₄ budgets. These budgets, in turn, provide a means to indirectly estimate the C/N/P of OM being exported from the surface layer of the ocean. The indirectly estimated C/N/P of exported OM reach maxima in the subtropical gyres at 177/22/1, that is, significantly greater than the Redfield ratio and a minimum in the equatorial ocean at 109/16/1 with both results agreeing with available observed particle C/N/P and ocean biogeochemical models. The budget approach was applied to a bioactive trace element (TE) using the measured dissolved Cadmium (Cd) to PO₄ gradients to estimate the Cd/P of exported OM in the Pacific Ocean. Combining the budget method with the availability of high-quality dissolved nutrient and TE data collected during the GOSHIP and GEOTRACES programs could potentially provide estimates of the C/N/P/TE of exported OM on global ocean scales which would significantly improve our understanding of the link between the ocean's biological pump and dissolved nutrient distributions in the upper ocean.

中文翻译：

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出口有机物的元素组成对观测到的海洋上层溶解营养和微量元素分布的影响

观察到太平洋上层（300 m）中溶解无机碳（ΔDIC）：硝酸盐（ΔNO ₃）：磷酸盐（ΔPO ₄）的养分深度梯度比率的系统区域变化。ΔDIC/ΔNO ₃ /ΔPO _{4 的}区域差异主要是有机物（OM）的C/N/P输出并随后降解、固氮和海气CO ₂气体三个过程的结果交换。使用表层溶解的 DIC、NO ₃和 PO ₄建立了观察到的溶解的 ΔDIC/ΔNO ₃ /ΔPO ₄与输出 OM 的 C/N/P 之间的联系预算。反过来，这些预算提供了一种方法来间接估算从海洋表层输出的 OM 的 C/N/P。间接估计的输出OM的C/N/P在177/22/1的亚热带环流达到最大值，即显着大于Redfield比，在赤道海洋的最小值为109/16/1，两者结果一致与可用的观测粒子 C/N/P 和海洋生物地球化学模型。使用测量的溶解镉 (Cd) to PO ₄将预算方法应用于生物活性微量元素 (TE)梯度估计太平洋中出口 OM 的 Cd/P。将预算方法与在GOSHIP 和GEOTRACES 计划期间收集的高质量溶解养分和TE 数据的可用性相结合，可能会提供全球海洋尺度上输出OM 的C/N/P/TE 估计值，这将显着提高我们对海洋生物泵与上层海洋溶解养分分布之间的联系。