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Changes in the burial efficiency and composition of terrestrial organic carbon along the Mackenzie Trough in the Beaufort Sea

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Title
Changes in the burial efficiency and composition of terrestrial organic carbon along the Mackenzie Trough in the Beaufort Sea
Other Titles
버포트해 메켄지 트로프에서의 육상기원 유기물의 조성과 burial efficiency 변화
Authors
Kim, Dahae
Kim, Jung-Hyun
Tommaso Tesi
강수진
Alessio Nogarotto
박광규
이동헌
Jin, Young Keun
신경훈
Nam, Seung-il
Keywords
Beaufort SeaLignin phenolsMackenzie TroughTerrestrial organic carbonn-alkanesΔ14Cδ13C
Issue Date
2022
Citation
Kim, Dahae, et al. 2022. "Changes in the burial efficiency and composition of terrestrial organic carbon along the Mackenzie Trough in the Beaufort Sea". ESTUARINE COASTAL AND SHELF SCIENCE, 275(1): 1-13.
Abstract
In this study, we investigated surface sediments collected along a Mackenzie Trough transect during the R/V Araon expeditions (ARA04C, ARA05C, and ARA08C) in the Beaufort Sea in 2013, 2014, and 2017. We applied various inorganic and organic geochemical tools (major elements, carbon and nitrogen contents, stable carbon and radiocarbon isotope compositions, and molecular biomarkers) in combination with sedimentological mea surements (mineral surface area (SA) and grain size) to assess the source and burial characteristics of organic carbon (OC). In general, the sediment mean grain size decreased with water depth whereas the SA increased, resulting in a decrease in the OC loading and the burial efficiency of terrestrial OC. The sedimentary OC was further influenced by the loss of terrestrial OC and replacement with marine OC with increasing water depth. Accordingly, our results suggest that hydrodynamic sorting and degradation of terrestrial OC co-occurred together with the enrichment of marine OC with distance offshore. Such processes controlled the burial and reactivity of terrestrial OC along the Mackenzie Trough transect.
URI
https://repository.kopri.re.kr/handle/201206/13922
DOI
http://dx.doi.org/10.1016/j.ecss.2022.107997
Type
Article
Station
Araon
Indexed
SCIE
Appears in Collections  
2022-2022, Survey of Geology and Seabed Enviromental Change in the Arctic Seas (22-22) / Hong, Jong Kuk (PM22050)
2022-2022, Vulnerability and resilience of the Arctic Svalbard to climate variability (22-22) / Nam, Seung-il (PN22013)
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