Evidence of Anomalously Low δ¹³C of Marine Organic Matter in an Arctic Fjord.

ABSTRACT: Accurate estimation of relative carbon deposition (marine vs. terrestrial) is required for understanding the global carbon budget, particularly in the Arctic region, which holds disproportionate importance with respect to global carbon cycling. Although the sedimentary organic matter (SOM) concentration and its isotopic composition are important tools for such calculations, uncertainties loom over estimates provided by organic-geochemical bulk parameters. We report carbon and nitrogen concentrations and isotopes (δ¹³C and δ¹⁵N) of SOM at an Arctic fjord namely Kongsfjorden. We find that the bound inorganic nitrogen (ammonium attached to the clay minerals) forms a significant proportion of total nitrogen concentration (~77% in the inner fjord to ~24% in the outer part)

SUBMITTER: Kumar V 

PROVIDER: S-EPMC5101485 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature