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首页> 外文期刊>Journal of oceanography >O2 consumption rate and its isotopic fractionation factor in the deep water of the Philippine Sea
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O2 consumption rate and its isotopic fractionation factor in the deep water of the Philippine Sea

机译：菲律宾深海氧气消耗率及其同位素分馏因子

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Concentration and stable isotopic compositions (δ18O) of dissolved O2 were measured in seawater samples collected from the Philippine Sea in June 2006. The in-situ O2 consumption rate and the isotopic fractionation factor (αr) during dissolved O2 consumption were obtained from field observations by applying a vertical one-dimensional advection diffusion model to the deep water mass of about 1000–4000 m. The average O2 consumption rate and αr were, respectively, 0.11 ± 0.07 μmol kg?1yr?1 and 0.990 ± 0.001. These estimated values agree well with values from earlier estimations of Pacific deep water. The in-situ O2 consumption rates are two or more times higher north of 20°N, although the value of αr was not significantly different between the north and south. Its levels varied rapidly in the water mass of less about 2000 m depth. These results suggest that organic matter from the continent imparts a meaningful contribution to the upper water in the northern part of the area; it might produce the strong O2 minimum that is evident in the water mass from about 1000–2000 m in the northern part of the Philippine Sea.
机译：对2006年6月从菲律宾海收集的海水样品中溶解的O2的浓度和稳定的同位素组成（δ18O）进行了测量。通过现场观测获得了原位O2的消耗速率和溶解O2消耗期间的同位素分馏因子（αr）。将垂直一维对流扩散模型应用于约1000–4000 m的深水质量。平均O 2消耗率和αr分别为0.11±0.07μmol·kg·1yr·1和0.990±0.001。这些估算值与早期对太平洋深水估算的值非常吻合。尽管αr的值在南北之间没有显着差异，但原位O2消耗率是20°N以北的两倍或更多倍。在水深小于2000 m的水中，水位迅速变化。这些结果表明，来自该大陆的有机物为该地区北部的上层水做出了有意义的贡献。在菲律宾海北部大约1000–2000 m的水团中可能会产生强烈的最低O2含量。

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