Estimating of gas transfer velocity using triple isotopes of dissolved oxygen

The atmosphere-ocean exchange of climatically important gases is determined by the transfer velocity (k) and concentration gradient across the interface. Based on observations in the northwestern subarctic Pacific and Sagami Bay, we report here the results of the first ever application of the natura...

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Bibliographic Details
Published in:Journal of oceanography 2010-08, Vol.66 (4), p.505-512
Main Authors: Sarma, V. V. S. S, Abe, Osamu, Honda, Makio, Saino, Toshiro
Format: Article
Language:English
Subjects:
Anthropogenic factors
biogeochemical cycles
Biogeochemistry
Carbon cycle
Dissolved oxygen
Earth and Environmental Science
Earth Sciences
Freshwater & Marine Ecology
Gas exchange
Gas transfer velocity
Isotopes
Marine
Ocean-atmosphere interaction
Oceanography
Original Articles
Oxygen isotopes
stable isotopes
Wind speed
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Summary:The atmosphere-ocean exchange of climatically important gases is determined by the transfer velocity (k) and concentration gradient across the interface. Based on observations in the northwestern subarctic Pacific and Sagami Bay, we report here the results of the first ever application of the natural abundance of triple isotopes of dissolved oxygen (¹⁶O, ¹⁷O and ¹⁸O) for direct estimation of k and propose a new relationship with wind speed. The k values estimated from nighttime variations in oxygen isotopes are found to be higher than the direct estimations at low wind speed (13 m s⁻¹) and showed significant spatial variability. The method presented here can be used to derive seasonal and spatial variations in k and the influence of surface conditions on the value, leading to improved estimates of biogenic/anthropogenic gas exchange at the air-sea interface.
ISSN:0916-8370
1573-868X
DOI:10.1007/s10872-010-0042-8