Basin‐wide particulate carbon flux in the Atlantic Ocean: Regional export patterns and potential for atmospheric CO2 sequestration
Tóm tắt
Particle flux data from 27 sites in the Atlantic Ocean have been compiled in order to determine regional variations in the strength and efficiency of the biological pump and to quantify carbon fluxes over the ocean basin, thus estimating the potential oceanic sequestration of atmospheric CO2. An algorithm is derived relating annual particulate organic carbon (POC) flux to primary production and depth that yields variations in the export ratio (ER = POC flux/primary production) at 125 m of between 0.08 and 0.38 over the range of production from 50 to 400 g C m−2 yr−1. Significant regional differences in changes of the export ratio with depth are related to the temporal stability of flux. Sites with more pulsed export have higher export ratios at 125 m but show more rapid decreases of POC flux with depth, resulting in little geographic variation in fluxes below ∼3000 m. The opposing effects of organic carbon production and calcification on Δ
Từ khóa
Tài liệu tham khảo
Berger W. H. K.Fischer C.Lai G.Wu Ocean carbon flux: Global maps of primary production and export production Biogeochemical Cycling and Fluxes Between the Deep Euphotic Zone and Other Oceanic RealmsC.Agegian SIO Ref. 87‐30 1–44Univ. of Calif. San Diego Scripp Inst. of Oceanogr. La Jolla Calif. 1987.
Deuser W. G., 1996, Particle Flux in the Ocean, 185
Kano J., 1990, Relation between increase of coral and atmospheric carbon dioxide concentration, Sora, 65, 1
Longhurst A., 1998, Ecological Geography of the Sea
Monterey G. S.Levitus Seasonal variability of mixed layer depth for the world ocean NOAA Atlas NESDIS 14 96 U.S. Govt. Print. Off. Washington D.C. 1997.
Rey F., 1991, The Norwegian Coastal Current, 649
Sarnthein M., 1992, Upwelling Systems: Evolution Since the early Miocene, 411
Wefer G., 1999, Use of Proxies in Paeoceanography: Examples From the South Atlantic, 1