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Atmospheric CO 2 flux from mangrove surrounding waters
Author(s) -
Borges A. V.,
Djenidi S.,
Lacroix G.,
Théate J.,
Delille B.,
Frankignoulle M.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017143
Subject(s) - mangrove , environmental science , atmosphere (unit) , vegetation (pathology) , ecosystem , flux (metallurgy) , mangrove ecosystem , atmospheric sciences , range (aeronautics) , oceanography , hydrology (agriculture) , geology , ecology , geography , chemistry , meteorology , organic chemistry , biology , medicine , materials science , geotechnical engineering , pathology , composite material
The partial pressure of CO 2 (pCO 2 ) was measured at daily and weekly time scales in the waters surrounding mangrove forests in Papua New Guinea, the Bahamas and India. The pCO 2 values range from 380 to 4800 μatm. These data, together with previously published data, suggest that overall oversaturation of CO 2 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 CO 2 . The computed CO 2 fluxes converge to about +50 mmolC m −2 day −1 . If this conservative value is extrapolated for worldwide mangrove ecosystems, the global emission of CO 2 to the atmosphere is about 50 10 6 tC year −1 . Based on this tentative estimate, mangrove waters appear to be regionally a significant source of CO 2 to the atmosphere and should be more thoroughly investigated, especially at seasonal time scale.