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Importance of organic matter in mercury spatial distribution into Svalbard fjord sediments

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Title
Importance of organic matter in mercury spatial distribution into Svalbard fjord sediments
Other Titles
스발바르 피오르드 퇴적물에 수은의 공간적 분포에 대한 유기물의 중요성
Authors
Kim, Haryun
Szczucinski, Witold
Lee, Kitack
Lim, Dhong-Il
Han, Seung hee
Kim, Tae-Wook
Joo, Young Ji
Kwon, Sae Yun
Forwick, Matthias
Kang, Moo-Hee
Nam, Seung-il
Keywords
FjordsGlaciersMarine sedimentsOrganic matterSvalbardTotal mercury
Issue Date
2019
Citation
Kim, Haryun, et al. 2019. Importance of organic matter in mercury spatial distribution into Svalbard fjord sediments. The 25th International Symposium on Polar Sciences. KOPRI. 2019.05.13~2019.05.15.
Abstract
In the Arctic fjords of Svalbard, the increasing ablation and retreat of glaciers have accelerated sediment discharge of mineral, as well as fresh and ancient organic matter from land to fjord sediments. Consequently, the latter may contain significant concentrations of organic matter bound mercury (Hg). The present study revealed that the average of total mercury (THg; 52 ± 15 ng g-1) and total organic carbon (TOC; 17 ± 5.5 mg g-1) contents observed in the Hornsund surface sediments, where the rate of glaciers retreat and the length of calving fronts are the largest among Svalbard fjords, are significantly higher compared to surface sediments in Wijdefjorden (30 ± 15 ng g-1 for THg and 12 ± 5.4 mg g-1 for TOC) and Dicksonfjorden (18 ± 7 ng g-1 for THg and 6.4 ± 3.4 mg g-1 for TOC). In addition, a strong positive relationship between THg and TOC concentrations indicates that Hg bound to organic matter is responsible for the spatial distribution of THg concentrations in the Svalbard fjord surface sediments. The transfer of mineral and organic matter to fjord sediments caused by the melting of glaciers is expected to accelerate the releases and transport of THg into the Arctic fjord ecosystems in the future.
URI
https://repository.kopri.re.kr/handle/201206/12629
Conference Name
The 25th International Symposium on Polar Sciences
Conference Place
KOPRI
Conference Date
2019.05.13~2019.05.15
Type
Proceeding
Indexed
Pro(초록)국외
Appears in Collections  
2019-2019, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (19-19) / Nam, Seung-il (PN19090)
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