气候变化领域集成服务门户(CCPortal): Identifying recent sources and fate of sedimentary nitrogen in the Baltic Sea based on organic matter elemental composition and nitrogen and carbon stable isotopes ratios

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DOI	10.1016/j.marpolbul.2020.111622
	Identifying recent sources and fate of sedimentary nitrogen in the Baltic Sea based on organic matter elemental composition and nitrogen and carbon stable isotopes ratios
	Winogradow A.; Pempkowiak J.
发表日期	2020
ISSN	0025326X
卷号	160
英文摘要	Sedimentary nitrogen (SN) provenience and fate in surface and subsurface sediments collected from the Baltic Sea were assessed. SN and sedimentary organic carbon (SOC) concentrations, stable isotopic signatures (δ15NSN and δ13CSOC) and SOC/SN molar ratios, were determined in subsequent layers of twenty-four sediment cores dated with 210Pb/137Cs and fifty-seven surface sediments. Sedimentation rates in the range 66–736 g/m2yr−1 (0.05–0.34 cm/year) were measured. Prolonged incubation of sediments in the laboratory led to a 17–37% decrease of SN in surface sediments, and no SN loss in sediments deposited before 1940. Decrease of δ15NSN on incubation (1‰ on average), and gradients of δ15NSN, between recent - surface (3.5‰) vs. 100 years old - subsurface (2.1‰) sediments were attributed to varying contributions of labile nitrogen to the SN pool. Annual deposition of SN to sediment surface and burial in subsurface sediments amounted, respectively, to 5 ± 2 g/m2 and 3.5 ± 1 g/m2. © 2020 Elsevier Ltd
英文关键词	210Pb/137Cs dating; Deep depositional basins; Nitrogen burial; Nitrogen deposition; Shallow coastal areas
语种	英语
scopus关键词	Isotopes; Molar concentration; Molar ratio; Nitrogen; Sedimentology; Surficial sediments; Carbon stable isotopes; Elemental compositions; Isotopic signatures; Sediment core; Sediment surface; Sedimentation rates; Subsurface sediments; Surface sediments; Organic carbon; carbon; carbon 13; cesium 137; lead 210; nitrogen; nitrogen 15; organic matter; carbon isotope; chemical composition; coastal zone; dating method; deposition; isotopic ratio; marine sediment; nitrogen isotope; organic carbon; stable isotope; surficial sediment; Article; Baltic Sea; chemical composition; concentration (parameter); sediment; sedimentation rate; surface area; Atlantic Ocean; Baltic Sea
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148520
作者单位	Institute of Oceanology PAN, PO Box 197, Sopot, Poland
推荐引用方式 GB/T 7714	Winogradow A.,Pempkowiak J.. Identifying recent sources and fate of sedimentary nitrogen in the Baltic Sea based on organic matter elemental composition and nitrogen and carbon stable isotopes ratios[J],2020,160.
APA	Winogradow A.,&Pempkowiak J..(2020).Identifying recent sources and fate of sedimentary nitrogen in the Baltic Sea based on organic matter elemental composition and nitrogen and carbon stable isotopes ratios.Marine Pollution Bulletin,160.
MLA	Winogradow A.,et al."Identifying recent sources and fate of sedimentary nitrogen in the Baltic Sea based on organic matter elemental composition and nitrogen and carbon stable isotopes ratios".Marine Pollution Bulletin 160(2020).