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GEOPHYSICAL RESEARCH LETTERS,
VOL. 30, NO. 11,
1558,
doi:10.1029/2003GL017143,
2003
Atmospheric CO2 flux from mangrove surrounding waters
A. V. Borges
Université de Liège, MARE, Liège, Belgium
S. Djenidi
Université de Liège, MARE, Liège, Belgium
G. Lacroix
Université de Liège, MARE, Liège, Belgium
J. Théate
Université de Liège, MARE, Liège, Belgium
B. Delille
Université de Liège, MARE, Liège, Belgium
M. Frankignoulle
Université de Liège, MARE, Liège, Belgium
Abstract
The partial pressure of CO2 (pCO2) was measured at daily and weekly time scales in the waters surrounding mangrove forests in Papua New Guinea, the Bahamas
and India. The pCO2 values range from 380 to 4800 μatm. These data, together with previously published data, suggest that overall oversaturation
of CO2 with respect to atmospheric equilibrium in surface waters is a general feature of mangrove forests, though the entire ecosystems
(sediment, water and vegetation) are probably sinks for atmospheric CO2. The computed CO2 fluxes converge to about +50 mmolC m−2 day−1. If this conservative value is extrapolated for worldwide mangrove ecosystems, the global emission of CO2 to the atmosphere is about 50 106 tC year−1. Based on this tentative estimate, mangrove waters appear to be regionally a significant source of CO2 to the atmosphere and should be more thoroughly investigated, especially at seasonal time scale.
Received 17
February
2003;
accepted 6
May
2003;
published 4
June
2003.
Index Terms: 4806 Oceanography: Biological and Chemical: Carbon cycling; 4805 Oceanography: Biological and Chemical: Biogeochemical cycles (1615); 4820 Oceanography: Biological and Chemical: Gases; 4231 Oceanography: General: Equatorial oceanography; 4235 Oceanography: General: Estuarine processes.
Read Full Article (file size: 148177 bytes) Cited by
Citation: Borges, A. V., S. Djenidi, G. Lacroix, J. Théate, B. Delille, and M. Frankignoulle
(2003),
Atmospheric CO2 flux from mangrove surrounding waters,
Geophys. Res. Lett.,
30(11),
1558,
doi:10.1029/2003GL017143.
Copyright 2003 by the American Geophysical Union.
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