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An observation of primary production enhanced by coastal upwelling in the southwest East/Japan Sea

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Title
An observation of primary production enhanced by coastal upwelling in the southwest East/Japan Sea
Other Titles
동해 연안 용승으로 강화된 일차생산력 관측
Authors
Hahm, Doshik
Rhee, Tae Siek
Kim, Hyun-cheol
Jang, Chan Joo
Kim, Yong Sun
Park, Jae-Hun
Subject
Marine & Freshwater Biology; Oceanography; Geology
Keywords
East Sea; O-2/Ar; coastal upwelling; primaery production
Issue Date
2019-07
Citation
Hahm, Doshik, et al. 2019. "An observation of primary production enhanced by coastal upwelling in the southwest East/Japan Sea". JOURNAL OF MARINE SYSTEMS, 195(1): 30-37.
Abstract
Coastal upwelling (CU) is an important process that causes changes in physical and chemical properties, resulting in variation of biological processes in a coastal area. In the southwestern part of the East/Japan Sea (SWES), CU has been alleged as one of the mechanisms responsible for higher net primary production (NPP) than the rest of the East/Japan Sea. We provide, for the first time, high spatial resolution underway observations of sea surface temperature, salinity, chlorophyll-a fluorescence and Delta(O-2/Ar), revealing the physical and biological characteristics of the upwelled waters in the SWES. The cold, upwelled waters retained high fluorescence and Delta(O-2/Ar), consistent with enhanced phytoplankton biomass and biological O-2 production by CU. The net community production (NCP) in the ambient and upwelled waters were 33 +/- 19 and 77 +/- 41 mmol O-2 m(-2) d(-1), respectively. The latter should be considered as a lower bound, containing a significant fraction of low O-2 waters from subsurface. Satellite observation indicated that NPP in the upwelled waters were higher than the ambient waters by 51%. This implies that up to half of higher NPP in the SWES than the rest of the East/Japan Sea can be ascribed to CU events.
URI
https://repository.kopri.re.kr/handle/201206/10903
DOI
http://dx.doi.org/10.1016/j.jmarsys.2019.03.005
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