Spatial and temporal variations in nutrient and chlorophyll-a concentrations in the northern East China Sea surrounding Cheju Island SCIE SCOPUS

Cited 25 time in WEB OF SCIENCE Cited 34 time in Scopus
Title
Spatial and temporal variations in nutrient and chlorophyll-a concentrations in the northern East China Sea surrounding Cheju Island
Author(s)
Kim, Dongseon; Choi, Sang Hwa; Kim, Kyung Hee; Shim, JeongHee; Yoo, Sinjae; Kim, Chul Ho
KIOST Author(s)
Kim, Dongseon(김동선)Choi, Sang-Hwa(최상화)
Publication Year
2009-06-15
Abstract
Nutrients, chlorophyll-a (Chl-a), and environmental conditions were extensively investigated in the northern East China Sea (ECS) near Cheju Island during five research cruises from 2003 to 2007. In the eastern part of the study area, surface waters were characterized only by the Tsushima Current Water (TCW) during all five cruises. However, the western surface waters changed with season and were characterized by the Yellow Sea Cold Water (YSCW) in spring, the Changjiang Diluted Water (CDW) in summer, and the Yellow Sea Mixed Water (YSMW) in autumn. In spring and autumn, relatively high concentrations of nitrate and phosphate were observed in the surface waters in the western part of the study area, where vertical mixing brought large supplies of nutrients from deep waters. Changes in wind direction occasionally varied the inflow of the Changjiang plume in summer, clearly causing the annual variation in surface nitrate and phosphate concentrations in summer. In summer, the surface distribution of nitrate and phosphate did not coincide with that of silicate in the study area, which probably resulted from the significant drop in the Si:N ratio in the Changjiang plume since construction of the Three Gorges Dam (TGD). Despite large temporal and spatial variations in surface Chl-a concentrations, depth-integrated Chl-a concentrations exhibited little variation temporally and spatially. In the study area, surface Chl-a concentration did not well reflect the standing stocks of phytoplankton. The vertical distribution of Chl-a showed large temporal and spatial variations, and the main factor controlling the vertical distribution of Chl-a in summer was the availability of nitrate. The thermohaline front may play an important role for accumulation of phytoplankton biomass in spring and autumn. (C) 2009 Elsevier Ltd. All rights reserved.
ISSN
0278-4343
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4281
DOI
10.1016/j.csr.2009.03.012
Bibliographic Citation
CONTINENTAL SHELF RESEARCH, v.29, no.11-12, pp.1426 - 1436, 2009
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
CHANGJIANG YANGTZE-RIVER; CHEMICAL HYDROGRAPHY; WATER; KUROSHIO; SUMMER; EXCHANGE; SEAWATER; IMPACTS; ESTUARY; NITRATE
Keywords
Nitrate; Phosphate; Silicate; Chlorophyll-a; Northern East China Sea
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Chemical oceanography,Ocean carbon cycle,화학해양학,해양탄소순환

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