Contribution of Sea-State Dependent Bubbles to Air-Sea Carbon Dioxide Fluxes

Type Article
Date 2020-05
Language English
Author(s) Reichil B. G.1, 2, Deike L.3, 4
Affiliation(s) 1 : Princeton Univ, Program Atmospner & Ocean Sci, Princeton, NJ 08544 USA.
2 : NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA.
3 : Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
4 : Princeton Univ, Princeton Environm Inst, Princeton, NJ 08544 USA.
Source Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2020-05 , Vol. 47 , N. 9 , P. e2020GL087267 (12p.)
DOI 10.1029/2020GL087267
WOS© Times Cited 2
Abstract

Breaking surface ocean waves produce bubbles that are important for air-sea gas exchanges, particularly during high winds. In this study we estimate air-sea CO2 fluxes globally using a new approach that considers the surface wave contribution to gas fluxes. We estimate that 40% of the net air-sea CO2 flux is via bubbles, with annual, seasonal, and regional variability. When compared to traditional gas-flux parameterization methods that consider the wind speed alone, we find high-frequency (daily to weekly) differences in the predicted gas flux using the sea-state dependent method at spatial scales related to atmospheric weather (10 to 100 km). Seasonal net differences in the air-sea CO2 flux due to the sea-state dependence can exceed 20%, with the largest values associated with North Atlantic and North Pacific winter storms. These results confirm that bubbles are important for global gas-flux dynamics and that sea-state dependent parameterizations may improve performance of global coupled models.

Full Text
File Pages Size Access
Publisher's official version 12 6 MB Open access
Top of the page