Evaluation of the Stockholm Archipelago sediments, northwestern Baltic Sea Proper, as a trap for freshwater runoff organic carbon

详细信息	查看全文 | 推荐本文 |

• 作者：J脙脙nsson ; Anders ; Lindstr脙脙m ; Martin ; Carman ; Rolf ; M脙脙rth ; Carl-Magnus ; Meili ; Markus ; et. al.
• 关键词：Urban estuary ; Carbon burial ; Stable carbon isotopes
• 刊名：Journal of Marine Systems
• 出版年：2005
• 期刊代码：46_09247963
• 类别：env
• 出版时间：May, 2005
• 卷：56
• 期：1-2
• 页码：167-178
• 文件大小：294 K

摘要

Time-series data on the freshwater inflow of total organic carbon (TOC) to the Stockholm Archipelago, Baltic Sea, covering four full years, showed a distinct seasonal pattern with six times higher monthly flow in winter–spring than in the summer with an annual freshwater TOC input of 28 Gg year⁻¹. Estimation of burial flux and source apportionment of sedimentary OC in the Inner Archipelago (IA) was based on extensive sediment sampling of seismically surveyed accumulation bottom areas. The resulting IA-averaged OC content was 56±16 mg g dw⁻¹ sediment, yielding an IA-wide bottom sediment deposition for the 1992–1995 period of 3.1 Gg year⁻¹.

The sediments in the eastern Lake Mälaren (LM), IA, and Outer Archipelago (OA) were geochemically distinguishable based on their stable carbon isotope signatures (b4;¹³C). The b4;¹³C values were −28.2±0.6, −25.4±1.0, and −23.6±0.3, respectively, for LM (n