Application of chemical tracers to estimate denitrification in the Okhotsk Sea
Application of chemical tracers to estimate denitrification in the Okhotsk Sea
复制标题
应用化学示踪剂估算鄂霍茨克海反硝化作用
DOI：
10.1007/s10872-014-0241-9
复制
发表时间：
2014
影响因子：
2.3
通讯作者：
J. Nishioka
中科院分区：
文献类型：
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作者：
Ito M.;Y. W. Watanabe;M. Shigemitsu;S. S. Tanaka;J. Nishioka
为了估算边缘海底栖生物的反硝化作用，我们评估了一种新的示踪剂，利用溶解的N2和Ar测量鄂霍次克海中间层（26.6-27.4σθ）的过量氮气（N2）的有效性。考察的影响参数有脱氮、空气喷射和快速冷却。我们使用多元线性回归分析研究了这些影响的相对比例。最好的模型包括两个检查参数的脱氮和空气注入的基础上赤池信息标准作为衡量模型拟合数据。其中80%以上来自反硝化，其次是空气注入.鄂霍次克海陆架地区的反硝化作用估计为5.6 ± 2.4 μmol kg−1。在26.6 ~ 27.4σθ之间，α的分布与位温（θ）相关（r=-0.55）。因此，我们得出结论，和N * 可以作为补充，作为一个准保守的示踪剂在鄂霍次克海的底栖反硝化作用。我们的研究结果表明，锡与N * 的组合是一个有用的化学示踪剂，以估计底栖反硝化作用在边缘海。
To estimate benthic denitrification in a marginal sea, we assessed the usefulness of, a new tracer to measure the excess nitrogen gas (N2) using dissolved N2and argon (Ar) withN*in the intermediate layer (26.6–27.4σθ) of the Okhotsk Sea. The examined parameters capable of affectingare denitrification, air injection and rapid cooling. We investigated the relative proportions of these effects onusing multiple linear regression analysis. The best model included two examined parameters of denitrification and air injection based on the Akaike information criterion as a measure of the model fit to data. More than 80 % ofwas derived from the denitrification, followed by air injection. Denitrification over the Okhotsk Sea shelf region was estimated to be 5.6 ± 2.4 μmol kg−1. The distribution ofwas correlated with potential temperature (θ) between 26.6 and 27.4σθ(r= −0.55). Therefore, we concluded thatandN*can act complementarily as a quasi-conservative tracer of benthic denitrification in the Okhotsk Sea. Our findings suggest thatin combination withN*is a useful chemical tracer to estimate benthic denitrification in a marginal sea.