Kinetic and equilibrium fractionation of O2 isotopologues during air-water gas transfer and implications for tracing oxygen cycling in the ocean
Kinetic and equilibrium fractionation of O2 isotopologues during air-water gas transfer and implications for tracing oxygen cycling in the ocean
复制标题
空气-水气体转移过程中 O2 同位素体的动力学和平衡分馏及其对追踪海洋氧循环的影响
DOI:
10.1016/j.marchem.2019.02.006
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发表时间:
2019
期刊:
影响因子:
3
通讯作者:
Ash, Jeanine L.
中科院分区:
文献类型:
--
作者:
Li, Boda;Yeung, Laurence Y.;Hu, Huanting;Ash, Jeanine L.
Oxygen isotopologues are useful tools for understanding biogeochemical processes and chemical budgets in the ocean. For example, the triple‑oxygen isotope composition of dissolved oxygen in the ocean mixed layer (i.e., its δ17O and δ18O values) is widely used to estimate gross oxygen productivity (GOP), a quantity closely related to gross primary productivity. While recent work has demonstrated the importance of upwelling and horizontal transport to these estimates, the isotopic effects of gas exchange when the mixed layer is out of solubility equilibrium have only been measured for18O/16O. Oxygen is rarely at 100% saturation in the surface ocean, so most regions experience net ingassing or outgassing; kinetic fractionation across the air-water boundary is therefore expected to be important. Here, we present the results of air-water gas transfer experiments designed to obtain the kinetic and equilibrium fractionation factors for the four rare O2isotopologues16O17O,16O18O,17O18O, and18O18O relative to16O16O. Furthermore, we examine their potential effects on isotopologue-based GOP estimates and connect the observed air-water kinetic fractionation factors to dissolved-phase diffusive isotopic fractionation. These kinetic fractionation effects may provide additional constraints on O2cycling at the surface and in the deep ocean.
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影响因子:
5
作者:
Young, ED;Galy, A;Nagahara, H
通讯作者:
Nagahara, H
影响因子:
56.9
作者:
L. Yeung;J. Ash;E. Young
通讯作者:
L. Yeung;J. Ash;E. Young
DOI:
--
发表时间:
2005
期刊:
Limnology and Oceanography 50(2)
影响因子:
--
作者:
Sarma VVSS;Abe O.;Hashimoto S.;Hinuma A.;Saino T.
通讯作者:
Saino T.
影响因子:
3
作者:
K. Tempest;S. Emerson
通讯作者:
S. Emerson
影响因子:
5.2
作者:
B. Luz;E. Barkan
通讯作者:
E. Barkan