KOPRI Repository

Assessing the impact of freshwater discharge on the fluid chemistry in the Svalbard fjords

Cited 0 time in wos
Cited 1 time in scopus
Assessing the impact of freshwater discharge on the fluid chemistry in the Svalbard fjords
Other Titles
담수 유출이 스발바르 피오르드 공극수에 미친 영향 평가
Kim, Ji-Hoon
Ryu, Jong-Sik
Hong, Wei-Li
Jang, Kwangchul
Joo, Young Ji
Lemarchand, Damien
Hur, Jin
Park, Myong-Ho
Chen, Meilian
Kang, Moo-Hee
Park, Sanghee
Nam, Seung-il
Lee, Yun Kyung
Svalbard archipelagobrineclimate changefreshwater dischargewater-rock interactions
Issue Date
Kim, Ji-Hoon, et al. 2022. "Assessing the impact of freshwater discharge on the fluid chemistry in the Svalbard fjords". SCIENCE OF THE TOTAL ENVIRONMENT, 835: 1-16.
Changes in the cryosphere extent (e.g., glacier, ice sheet, permafrost, and snow) have been speculated to impact (bio) geochemical interactions and element budgets of seawater and pore fluids in Arctic regions. However, this process has rarely been documented in Arctic fjords, which leads to a poor systematic understanding of land-ocean interactions in such a warming-susceptible region. Here, we present the chemical and isotopic (δ18O, δD, δ11B, and 87Sr/86Sr) compositions of seawater and pore fluids from five fjords in the Svalbard archipelago. Compared to bottom seawater, the low Cl- concentrations and depleted water isotopic signatures (δ18O and δD) of surface seawater and pore fluids delineate freshwater discharge originating from precipitation and/or meltwater of the cryosphere (i.e., glacier, snow, and permafrost). In contrast, the high Cl- concentrations with light water isotopic values in pore fluids from Dicksonfjorden indicate a brine probably resulted from submarine permafrost formation during the late Holocene, a timing supported by the numerical simulation of dissolved Cl- concentration. The freshwater is influenced by the local diagenetic processes such as ion exchanges indicated by δ11B signatures as well as interactions with bedrock during fluid migration inferred from pore fluid 87Sr/86Sr ratios. The interactions with bedrock significantly alter the hydrogeochemical properties of pore fluids in each fjord, yielding spatiotemporal variations. Consequently, land-ocean interactions in combination with the hydrosphere-cryosphere-lithosphere are critical factors for understanding and predicting the hydrology and elemental cycling during global climate change periods in the past, present, and future of the Svalbard archipelago.
Appears in Collections  
2021-2021, Survey of Geology and Seabed Environmental Change in the Arctic Seas (21-21) / Hong, Jong Kuk (PM21050)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.