Evaluation of similarity of water column properties and sinking particl between impact and preserved sites for environmental impact assessment the korea contracted area for manganese nodule development, NE pacific SCOPUS KCI

Title
Evaluation of similarity of water column properties and sinking particl between impact and preserved sites for environmental impact assessment the korea contracted area for manganese nodule development, NE pacific
Author(s)
Son, J.; Kim, K.H.; Kim, H.J.; Ju, S.-J.; Yoo, C.M.
KIOST Author(s)
Kim, Kyeong Hong(김경홍)Kim, Hyung Jeek(김형직)Yoo, Chan Min(유찬민)
Publication Year
2014
Abstract
Verifying the similarity of environmental characteristics between an artificial impact site and a preserved or reference site is necessary to quantitatively and qualitatively evaluate the environmental impact of mining activity. Although an impact site (BIS station) and a preserved site (called KOMO station) that have been selected in the Korea manganese nodule contract area may share similar environmental characteristics, similarities in terms of the water column environment between both sites has not been investigated. In this study, we compared the chemical properties of the water columns and sinking particle fluxes between BIS and KOMO stations through two observations (August 2011 and September 2012). Additionally, we observed particle fluxes at the KOMO station for five years (July 2003 ~ July 2008) to understand long-term natural variability. Vertical distributions of water column properties such as dissolved oxygen, inorganic nutrients (N, P, Si), total organic carbon below surface layer (within the depth range of 200 m) were not considerably different between the two sites. Especially, values of water column parameters in the abyssopelagic zone from 4000 m to bottom layer (~5000 m) were very similar between the BIS and KOMO sites. Sinking particle fluxes from the two sites also showed similar seasonality. However, natural variation of particle flux at the KOMO site varied from 3.5 to 129.9 mg m-2 day-1, with a distinct temporal variation originating from ENSO events (almost forty times higher than a minimum value). These results could provide valuable information to more exactly evaluate the environmental impact of mining activity on water columns. © 2014, Korea Ocean Research and Development Institute. All rights reserved.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2956
DOI
10.4217/OPR.2014.36.4.423
Bibliographic Citation
Ocean and Polar Research, v.36, no.4, pp.423 - 435, 2014
Publisher
Korea Ocean Research and Development Institute
Subject
benthos; chemical property; dissolved oxygen; environmental impact assessment; fracture zone; manganese nodule; mining; nutrient; total organic carbon; vertical distribution; water column; Clarion Fracture Zone; Clipperton Fracture Zone; Korea; Pacific Ocean; Pacific Ocean (Northeast)
Keywords
Benthic impact experiment; Clarion-Clipperton Fracture Zone; Manganese nodule; Natural variability; Sinking particle
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Particle flux,Carbon cycle,Climate Change,입자 플럭스,탄소순환,기후변화

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