Mathematics – Logic
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004eostr..85...47n&link_type=abstract
EOS Transactions, AGU, Volume 85, Issue 5, p. 47-51
Mathematics
Logic
72
Meetings, Oceanography: Biological And Chemical: Anoxic Environments, Oceanography: General: Marginal And Semienclosed Seas
Scientific paper
Life on Earth emerged under anaerobic conditions. Many fundamental biochemical and metabolic pathways evolved before the atmosphere contained oxygen. At present, anaerobic (anoxic) conditions in marine milieu are generally restricted to sediments and to basins isolated from oxygenated deep-sea circulation. Enhanced oxygen consumption by organic matter decomposition and slow downward mixing and diffusion of dissolved oxygen from the surface waters can lead to oxygen deficiency in the water column in highly productive waters, forming the Oxygen Minimum Zone (OMZ). Bottom waters of coastal upwelling regions are frequently exposed to anaerobic conditions owing to extremely high primary productivity. In the past, such conditions in the water column may have developed more readily; for example, in the mid-Cretaceous. Oceanic anoxic events (OAE) were episodes of globally enhanced organic carbon burial that have significantly affected global climate by reducing atmospheric CO2.
Barker Jørgensen Bo
Neretin Lev N.
Polikarpov Igor G.
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