Proper estimation of marine gross O2 production with 17O/16O and 18O/16O ratios of dissolved O2
Proper estimation of marine gross O2 production with 17O/16O and 18O/16O ratios of dissolved O2
复制标题
通过溶解 O2 的 17O/16O 和 18O/16O 比率正确估算海洋总 O2 产量
DOI：
10.1029/2011gl049138
复制
发表时间：
2011
影响因子：
5.2
通讯作者：
E. Barkan
中科院分区：
文献类型：
--
作者：
B. Luz;E. Barkan
最近，通过测量溶解氧的17O/16O和18O/16O来估计海洋总产出的方法得到了改进，得到了一个严格的总产出评估方程，并且表明与近似相关的小误差导致了对总产出速率的严重低估。这个新的方程式需要对光合作用和大气中氧气的同位素组成有准确的了解。虽然后者的值已经非常精确地确定，但前者的值从未测量过。本文首次通过实验推导出海洋光合O2的δ17Op和δ18Op值（- 10.126‰和- 20.014‰）。在此基础上，我们表明，所建议的低估不是近似误差的结果，而是由于δ17Op和δ18Op的估计值不准确造成的。
Recently, the method for estimation of marine gross production from measurements of 17O/16O and 18O/16O of dissolved O2 has been improved by obtaining a rigorous equation for evaluation of gross production, and it has been suggested that small errors associated with approximations resulted in significant underestimation of gross production rates. The new equation requires accurate knowledge of the isotopic composition of photosynthetic and atmospheric oxygen. While the values for the latter have been determined very precisely, those of the former have never been measured. Here we present the first experimentally derived values of δ17Op and δ18Op of marine photosynthetic O2 (−10.126 and −20.014 ‰). Based on these, we show that the suggested underestimation was not the result of approximation errors, rather it was caused by inaccurate estimated values of δ17Op and δ18Op.
技术说明：根据氧三重同位素测量对水产总产量进行一致计算
影响因子：
4.9
作者：
Kaiser J
通讯作者：
Kaiser J