Effect of wind waves on air–sea gas exchange: proposal of an overall CO2 transfer velocity formula as a function of breaking-wave parameter

D. Zhao; Y. Toba; Y. Suzuki; S. Komori

doi:10.3402/tellusb.v55i2.16747

Effect of wind waves on air–sea gas exchange: proposal of an overall CO2 transfer velocity formula as a function of breaking-wave parameter

Tellus B: Chemical and Physical Meteorology

Volume 55 (2003): Issue 2

By: D. Zhao, Y. Toba, Y. Suzuki and S. Komori

Open Access

|Jan 2003

Abstract

A new formula for gas transfer velocity as a function of the breaking-wave parameter is proposed based on correlating gas transfer with white cap coverage. The new formula for gas transfer across an air—sea interface depends not only on wind speed but also on wind-wave state. At the same wind speed, ahigher gas transfer velocity will be obtained for a more developed wind-sea, which is represented by asmaller spectral peak frequency of wind waves. We suggest that the large uncertainties in the traditional relationship of gas transfer velocity with wind speed be ascribed to the neglect of the effect of windwaves. The breaking-wave parameter can be regarded as a Reynolds number that characterizes the intensity of turbulence associated with wind waves in the downward-bursting boundary layer (DBBL). DBBL provides an effective way to exchange gas across the air—sea interface, which might be relatedto the surface renewal.

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DOI: https://doi.org/10.3402/tellusb.v55i2.16747 | Journal eISSN: 1600-0889

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Language: English

Page range: 478 - 487

Submitted on: Dec 27, 2001

Accepted on: Dec 9, 2002

Published on: Jan 1, 2003

Published by: Stockholm University Press

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© 2003 D. Zhao, Y. Toba, Y. Suzuki, S. Komori, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 55 (2003): Issue 2