Air-water gas exchange and CO2 flux in a mangrove-dominated estuary

Geophysical Research Letters
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Abstract

Mangrove forests are highly productive ecosystems, but the fate of mangrove-derived carbon remains uncertain. Part of that uncertainty stems from the fact that gas transfer velocities in mangrove-surrounded waters are not well determined, leading to uncertainty in air-water CO2 fluxes. Two SF6 tracer release experiments were conducted to determine gas transfer velocities (k(600) = 8.3 ± 0.4 and 8.1 ± 0.6 cm h−1), along with simultaneous measurements of pCO2 to determine the air-water CO2 fluxes from Shark River, Florida (232.11 ± 23.69 and 171.13 ± 20.28 mmol C m−2 d−1), an estuary within the largest contiguous mangrove forest in North America. The gas transfer velocity results are consistent with turbulent kinetic energy dissipation measurements, indicating a higher rate of turbulence and gas exchange than predicted by commonly used wind speed/gas exchange parameterizations. The results have important implications for carbon fluxes in mangrove ecosystems.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Air-water gas exchange and CO2 flux in a mangrove-dominated estuary
Series title Geophysical Research Letters
DOI 10.1002/2013GL058785
Volume 41
Issue 1
Year Published 2014
Language English
Publisher American Geophysical Union
Contributing office(s) Southeast Ecological Science Center
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geophysical Research Letters
First page 108
Last page 113
Country United States
State Florida
Other Geospatial Shark River