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

Cited 6 time in WEB OF SCIENCE Cited 10 time in Scopus
Title
Input of terrestrial organic matter linked to deglaciation increased mercury transport to the Svalbard fjords
Author(s)
Kim H.; Kwon S.Y.; Lee K.; Lim D.; Han S.; Kim T.-W.; Joo Y.J.; Lim J.; Kang M.-H.; Nam S.-I.
KIOST Author(s)
Lim, Dhong Il(임동일)
Publication Year
2020-02-26
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 showed 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 km(3) yr(-1)) and organic carbon accumulation rates (9.3 similar to 49.4 g m(-2) yr(-1)) were elevated compared to other fjords. Furthermore, the delta C-13 (-27 similar to -24 parts per thousand) and delta S-34 values (-10 similar to 15 parts per thousand) 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.
ISSN
2045-2322
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/38734
DOI
10.1038/s41598-020-60261-6
Bibliographic Citation
SCIENTIFIC REPORTS, v.10, no.1, 2020
Publisher
NATURE PUBLISHING GROUP
Subject
ATMOSPHERIC MERCURY; ARCTIC FJORD; ANTHROPOGENIC MERCURY; ISOTOPIC COMPOSITION; METAL CONTAMINATION; TIDEWATER GLACIER; STABLE-ISOTOPES; LAKE-SEDIMENTS; CARBON BURIAL; MARINE
Type
Article
Language
English
Document Type
Article
Publisher
NATURE PUBLISHING GROUP
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