Revising Estimates of Aquatic Gross Oxygen Production by the Triple Oxygen Isotope Method to Incorporate the Local Isotopic Composition of Water | Zendy

Manning Cara C. | Zendy; Howard Evan M. | Zendy; Nicholson David P. | Zendy; Ji Brenda Y. | Zendy; Sandwith Zoe O. | Zendy; Stanley Rachel H. R. | Zendy

Premium

Revising Estimates of Aquatic Gross Oxygen Production by the Triple Oxygen Isotope Method to Incorporate the Local Isotopic Composition of Water

Author(s) -

Manning Cara C.,

Howard Evan M.,

Nicholson David P.,

Ji Brenda Y.,

Sandwith Zoe O.,

Stanley Rachel H. R.

Publication year - 2017

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1002/2017gl074375

Subject(s) - seawater , composition (language) , oxygen , isotopes of oxygen , salinity , oxygen 18 , stable isotope ratio , isotope , chemistry , environmental science , analytical chemistry (journal) , environmental chemistry , geology , oceanography , physics , nuclear chemistry , organic chemistry , quantum mechanics , philosophy , linguistics

Measurement of the triple oxygen isotope (TOI) composition of O 2 is an established method for quantifying gross oxygen production (GOP) in natural waters. A standard assumption to this method is that the isotopic composition of H 2 O, the substrate for photosynthetic O 2 , is equivalent to Vienna standard mean ocean water (VSMOW). We present and validate a method for estimating the TOI composition of H 2 O based on mixing of local meteoric water and seawater H 2 O end‐members, and incorporating the TOI composition of H 2 O into GOP estimates. In the ocean, GOP estimates based on assuming the H 2 O is equivalent to VSMOW can have systematic errors of up to 48% and in low‐salinity systems, errors can be a factor of 2 or greater. In future TOI‐based GOP studies, TOI measurements of O 2 and H 2 O should be paired when the H 2 O isotopic composition is expected to differ from VSMOW.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research