Geochemistry of Organic Carbon in the Ocean

Average annual flux of organic carbon to the bottom in the arctic seas of Russia: a comparison of calculated and research instrument data from sediment traps

“…In the Arctic Ocean, Russia's Arctic seas play a special role, accumulating organic matter of predominantly planktonic genesis (Barents and Chukchi Seas) and organic matter of predominantly terrigenous genesis (White, Kara, Laptev, and East Siberian Seas) 2,25 . The resistance to decomposition of terrigenous, fluvial and mixed planktonic-terrigenous and thermoabrasion organic matter, which prevails in the seas of the Russian Arctic, determines that per unit area of the Arctic seas more than twice as much organic matter is buried in bottom sediments 2,25 than on average on the World Ocean shelf.…”

“…Regional, seasonal, and interannual variations in the amount and composition of the main mass of POC in the seas and oceans are determined mainly by the primary production of phytoplankton. The relationship between the flux of suspended particulate organic carbon and depth is usually described by a single power law or a rational decrease with depth, recalculated to the primary production [2][3] . Based on the maps of the annual average primary production of the Arctic seas, the maps of the annual average flux of suspended particulate organic carbon (С bio ) to the bottom were calculated 9 (Fig.…”

“…Particulate organic carbon (POC) is the most important component of suspended matter, which includes all particles released by filtration through various filters (pore size 0.1-0.6 µm) or collected by sediment traps. POC is the second largest component of the ocean ecosystem after dissolved organic carbon (DOC) and plays an important role in all biogeochemical processes and cycles of substances in the ocean [1][2] . Particulate organic carbon is a key component of the ocean carbon cycle and plays an important role in the global climate system [3][4][5] .…”

Carbon Footprint Reduction and Climate Change Mitigation: A Review of the Approaches, Technologies, and Implementation Challenges

“…Pelagic ecosystems of the world ocean, especially macro-and microalgae, are considered another important link in the sequestration of CO 2 from the atmosphere [134,139,173,174]. The net primary production of phytoplankton in the world ocean is ~60 × 10 3 Mt of organic carbon per year, which corresponds to ~200 × 10 3 Mt of CO 2 captured by primary producers from the atmosphere [175]. However, only a small part of the assimilated carbon reaches the bottom and is buried in sediments (~250 Mt), equivalent to ~900-950 Mt CO 2 .…”