http://scholars.ntou.edu.tw/handle/123456789/9385
Title: | Sulfur Geochemistry of a Lacustrine Record from Taiwan Reveals Enhanced Marine Aerosol Input during the Early Holocene | Authors: | Ding, Xiaodong Li, Dawei Zheng, Liwei Bao, Hongyan Chen, Huei-Fen Kao, Shuh-Ji |
Keywords: | SOUTHWESTERN TAIWAN;LAKE-SEDIMENTS;ENVIRONMENTAL-CHANGES;SULFATE REDUCTION;ISOTOPE FRACTIONATION;ATMOSPHERIC SULFUR;LAST DEGLACIATION;LATE PLEISTOCENE;WATER SEDIMENTS;FRESH-WATER | Issue Date: | 12-Dec-2016 | Publisher: | NATURE PUBLISHING GROUP | Journal Volume: | 6 | Source: | SCI REP-UK | Abstract: | Lacustrine record of marine aerosol input has rarely been documented. Here, we present the sulfur geochemistry during the last deglaciation and early Holocene of a sediment core retrieved from the Dongyuan Lake in southern Taiwan. An unusually high sulfur peak accompanying pyrite presence is observed at 10.5 ka BP. Such high sulfur content in lacustrine record is unusual. The delta S-34 of sulfur varied from +9.5 to +17.1% with two significant positive shifts at 10.5 and 9.4 ka BP. The sources of sulfur and potential processes involving the sulfur isotope variation including bacterial sulfate reduction, volcanic emissions, in-catchment sulfide oxidation and marine aerosol input are discussed. Enhanced marine aerosol input is the most likely explanation for such sulfur peaks and delta S-34 shifts. The positive delta S-34 shifts appeared concurrently with the maximum landslide events over Taiwan resulted from enhanced typhoon activities. The synchronicity among records suggests that increased typhoon activities promoted sea spray, and consequently enhanced the marine aerosol input with S-34-enriched sulfate. Our sulfur geochemistry data revealed sea spray history and marine influence onto terrestrial environment at coastal regions. Wider coverage of spatial-temporal lacustrine sulfur geochemistry record is needed to validate the applicability of sulfur proxy in paleoenvironmental research. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/9385 | ISSN: | 2045-2322 | DOI: | 10.1038/srep38989 |
Appears in Collections: | 地球科學研究所 06 CLEAN WATER & SANITATION 14 LIFE BELOW WATER 15 LIFE ON LAND |
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