Publication Date:
2015-04-16
Description:
In situ measurements were made to determine oxygen (O 2 ) metabolic balance in the upper oligotrophic ocean from diel changes in O 2 to argon (Ar) ratios. The study took place during 13–24 March 2014, at the Hawaii Ocean Time-series (HOT) Station ALOHA, in the North Pacific Subtropical Gyre. Microbial community respiration (MCR) and gross O 2 production (GOP), estimated from in situ diel changes in O 2 /Ar saturation, agreed well with those calculated using other independent methods. Net oxygen production (NOP), estimated from in situ diel changes in O 2 /Ar saturation, showed large day-to-day variability. However, when averaged over the entire observational period, mean diel NOP was in relatively good agreement with the estimated mean steady-state NOP (9.2 ± 9.3 mmol O 2 m −2 d −1 compared to 11.7 ± 1.1 mmol O 2 m −2 d −1 , respectively).
Print ISSN:
0094-8276
Electronic ISSN:
1944-8007
Topics:
Geosciences
,
Physics
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