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Input of terrestrial organic matter linked to deglaciation increased mercury transport to the Svalbard fjords

Cited 3 time in wos
Cited 3 time in scopus
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Title
Input of terrestrial organic matter linked to deglaciation increased mercury transport to the Svalbard fjords
Other Titles
융빙에 의한 육상기원 유기물 유입에 의한 스발바르 피오르드로 수은 수송 증가
Authors
Kim, Haryun
Kwon, Sae Yun
Lee, Kitack
Lim, Dhongil
Han, Seunghee
Kim, Tae-Wook
Joo, Young Ji
Lim, Jaesoo
Kang, Moo-Hee
Nam, Seung-il
Subject
Science & Technology
Keywords
Glaciers; Marine sediments; Organic matter; Svalbard Fjords; Total mercury
Issue Date
2020-02
Citation
Kim, Haryun, et al. 2020. "Input of terrestrial organic matter linked to deglaciation increased mercury transport to the Svalbard fjords". SCIENTIFIC REPORTS, 10(1): 1-11.
Abstract
Deglaciation has accelerated the transport of minerals as well as modern and ancient organic matter from land to fjord sediments in Spitsbergen, Svalbard in the European Arctic Ocean. Consequently, such sediments may contain significant levels of total mercury (THg) bound to terrestrial organic matter. The present study compared THg contents in surface sediments from three fjord settings in Spitsbergen: Hornsund in the southern Spitsbergen, which has high annual volume of loss glacier and receives sediment from multiple tidewater glaciers, Dicksonfjorden in the central Spitsbergen, which receives sediment from glacifluvial rivers, and Wijdefjorden in the northern Spitsbergen, which receive sediments from a mixture of tidewater glaciers and glacifluvial rivers. Our results suggested that the THg (52 ± 15 ng g-1) bound to organic matter (OM) was the highest in the Hornsund surface sediments, where the glacier loss (0.44 km3 yr-1) and organic carbon accumulation rates (9.3 ~ 49.4 g m-2 yr-1) were elevated compared to other fjords. Furthermore, the δ13C (27 ~ 24‰) and δ34S values (10 ~ 15‰) of OM indicated that most of OM were originated from terrestrial sources. Thus, the temperature-driven glacial melting could release more OM originating from the meltwater or terrestrial materials, which are available for THg binding in the European Arctic fjord ecosystems.
URI
https://repository.kopri.re.kr/handle/201206/11987
DOI
http://dx.doi.org/10.1038/s41598-020-60261-6
Appears in Collections  
2020-2020, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (20-20) / Nam, Seung-il (PN20090)
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