Burial fluxes and sources of organic carbon in sediments of the central Yellow Sea mud area over the past 200 years

摘要: Long-term changes of composition, sources and burial fluxes TOC (total organic carbon) in sediments the central Yellow Sea mud area their possible affecting factors are discussed this paper. Firstly, similarity analysis is employed to confirm that carbon features resulted from two collected cores typical where YSWC (Yellow Warm Current) prevalent. On basis, flux here was considered be 235.5–488.4 μmol/(cm2∙a) since first industrial revolution, accounting for about 70%–90% among TC sediments. Compared TOC/TC ratio with other marine worldwide, we suggest growth calcareous/non-calcareous organisms dissolution IC (inorganic important controlling sediment. Results two-end mixed model based on δ13C data indicate marine-derived (OCa) main part total which accounts a over 85%. Due high cores, also mainly exists as OCa, proportion OCa 60%–80%. Away shore relatively primary production upper waters reasons predominant all OC area. Burial probably influenced by human activities. Although economic development during late 19th century caused revolution China did not obviously increase sediments, rise industry agriculture after founding new has clearly increased 1950s. Otherwise, realize fluxes, TIC account 10%–30% area, so its could simply ignored here. Distinct burial, long-term variations relate climate more closely: East Asian summer monsoon may influence strength Huanghe River River) flood, further affect transport terrestrial land well these