Impact of sinking carbon flux on accumulation of deep-ocean carbon in the Northern Indian Ocean |
| |
Authors: | V V S S Sarma M Dileep Kumar T Saino |
| |
Institution: | (1) SORST, Japan Science and Technology Agency, Kawaguchi, Japan;(2) Hydrospheric–Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464 8601, Japan;(3) National Institute of Oceanography, Dona Paula, Goa, India |
| |
Abstract: | The export of carbon through the biological pump from the surface to the deep ocean has a direct influence on the removal
of CO2 from the atmosphere. This is because the carbon is sequestered for only a few days to months in the surface while the carbon
removed from the surface to deep waters takes hundreds of years to re-enter the atmosphere. The highest dissolved inorganic
carbon (DIC) is expected in the deep waters of the North Pacific due to longer age of waters. On contrary, the higher deep
water DIC is found in the northern Indian Ocean than elsewhere in the World Oceans. The sinking fluxes of particulate organic
(POC) and inorganic carbon (CaCO3) are found to be the highest in the northern Indian Ocean. The rates of bacterial respiration, organic carbon regeneration
and inorganic carbon dissolution are also found to be the highest in the northern Indian Ocean than elsewhere. A most efficient
biological pump appears to be operating in the northern Indian Ocean that transports surface-derived organic/inorganic carbon
to deeper layers where it is converted and stored for longer times in dissolved inorganic form. |
| |
Keywords: | Arabian Sea Carbon cycling Regeneration Sinking carbon fluxes |
本文献已被 SpringerLink 等数据库收录! |
|