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A Pulse of Meteoric Subsurface Fluid Discharging Into the Chukchi Sea During the Early Holocene Thermal Maximum (EHTM)

Cited 1 time in wos
Cited 2 time in scopus
Title
A Pulse of Meteoric Subsurface Fluid Discharging Into the Chukchi Sea During the Early Holocene Thermal Maximum (EHTM)
Other Titles
홀로세 최대 온난기 동안 척치해 담수 유출 이벤트
Authors
Kim, Ji-Hoon
Hong, Wei-Li
Torres, Marta E.
Ryu, Jong-Sik
Kang, Moo-Hee
Han, Dukki
Nam, Seung-il
Hur, Jin
Koh, Dong-Chan
Niessen, Frank
Lee, Dong-Hun
Jang, Kwangchul
Rae, James William Buchanan
Chen, Meilian
Subject
Geochemistry & Geophysics
Keywords
subsurface meteoric fluid dischargeArctic elementcarbon cyclepermafrostEHTMChukchi Sea
Issue Date
2021-08
Citation
Kim, Ji-Hoon, et al. 2021. "A Pulse of Meteoric Subsurface Fluid Discharging Into the Chukchi Sea During the Early Holocene Thermal Maximum (EHTM)". GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 22(8): 1-20.
Abstract
The response of Arctic Ocean biogeochemistry to subsurface flow driven by permafrost thaw is poorly understood. We present dissolved chloride and water isotopic data from the Chukchi Sea Shelf sediments that reveal the presence of a meteoric subsurface flow nriched in cations with a radiogenic Sr fingerprint. This subsurface fluid is also enriched in dissolved inorganic carbon and methane that bear isotopic compositions indicative of a carbon reservoir modified by reactions in a closed system. Such fluid characteristics are in stark contrast with those from other sites in the Chukchi Sea where the pore water composition shows no sign of meteoric input, but reflect typical biogeochemical reactions associated with early diagenetic sequences in marine sediment. The most likely source of the observed subsurface flow at the Chukchi Sea Shelf is from the degradation of permafrost that had extended to the shelf region during the Last Glacial Maximum. Our data suggest that the permafrostdriven subsurface flow most likely took place during the 2?3°C warming in the Early Holocene Thermal Maximum. This time scale is supported by numerical simulation of pore water profiles, which indicate that a minimum of several thousand years must have passed since the cessation of the subsurface methane-bearing fluid flow.
URI
https://repository.kopri.re.kr/handle/201206/13011
DOI
http://dx.doi.org/10.1029/2021GC009750
Type
Article
Station
기타()
Indexed
SCIE
Appears in Collections  
2020-2020, Based Research on International Joint Drilling for Reconstructing Evolution and Glacial History of the Arctic Ocean (20-20) / Nam, Seung-il (PE20350)
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