scholarly journals Water Mass Analysis of the East China Sea and Interannual Variation of Kuroshio Subsurface Water Intrusion Through an Optimum Multiparameter Method

2018 ◽  
Vol 123 (5) ◽  
pp. 3723-3738 ◽  
Author(s):  
Peng Zhou ◽  
Xiuxian Song ◽  
Yongquan Yuan ◽  
Xihua Cao ◽  
Wentao Wang ◽  
...  
Keyword(s):  
East China Sea ◽  
Interannual Variation ◽  
Water Mass ◽  
Subsurface Water ◽  
East China ◽  
Mass Analysis ◽  
The East China Sea ◽  
Water Intrusion ◽  
China Sea ◽  
Water Mass Analysis

Mixed layer water mass analysis on the east China sea inner shelf

2021 ◽  
pp. 107561
Author(s):  
Shuangzhao Li ◽  
Yisen Zhong ◽  
Meng Zhou ◽  
Hui Wu ◽  
Zhaoru Zhang ◽  
...  
Keyword(s):  
East China Sea ◽  
Mixed Layer ◽  
Water Mass ◽  
East China ◽  
Mass Analysis ◽  
The East China Sea ◽  
Inner Shelf ◽  
China Sea ◽  
Water Mass Analysis

scholarly journals Variability of the nutrient stream near Kuroshio's origin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chen-Tung Arthur Chen ◽  
Ting-Hsuan Huang ◽  
Chi-Hsuan Wu ◽  
Haiyan Yang ◽  
Xinyu Guo
Keyword(s):  
Pacific Ocean ◽  
Continental Shelf ◽  
East China Sea ◽  
Kuroshio Extension ◽  
Subsurface Water ◽  
East China ◽  
The East China Sea ◽  
High Productivity ◽  
China Sea ◽  
The Kuroshio

AbstractThe Kuroshio—literally “the Black Stream”—is the most substantial current in the Pacific Ocean. It was called the Black Stream because this oligotrophic current is so nutrient-poor in its euphotic zone that the water appears black without the influence of phytoplankton and the associated, often colored dissolved organic matter. Yet, below the euphotic layer, nutrient concentrations increase with depth while current speed declines. Consequently, a core of maximum nutrient flux, the so-called nutrient stream, develops at a depth of roughly between 200 and 800 m. This poorly studied nutrient stream transports nutrients to and supports high productivity and fisheries on the East China Sea continental shelf; it also transports nutrients to and promotes increased productivity and fisheries in the Kuroshio Extension and the subarctic Pacific Ocean. Three modes of the Kuroshio nutrient stream are detected off SE Taiwan for the first time: one has a single-core; one has two cores that are apparently separated by the ridge at 120.6–122° E, and one has two cores that are separated by a southward flow above the ridge. More importantly, northward nutrient transports seem to have been increasing since 2015 as a result of a 30% increase in subsurface water transport, which began in 2013. Such a nutrient stream supports the Kuroshio's high productivity, such as on the East China Sea continental shelf and in the Kuroshio Extension SE of Japan.

Interannual changes in summer phytoplankton community composition in relation to water mass variability in the East China Sea

2018 ◽  
Vol 75 (1) ◽  
pp. 61-79 ◽  
Author(s):  
Qian Xu ◽  
Chiho Sukigara ◽  
Joaquim I. Goes ◽  
Helga do Rosario Gomes ◽  
Yuanli Zhu ◽  
...  
Keyword(s):  
Community Composition ◽  
East China Sea ◽  
Phytoplankton Community ◽  
Water Mass ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Phytoplankton Community Composition

scholarly journals Responses of Primary Productivity and Phytoplankton Community to the Atmospheric Nutrient Deposition in the East China Sea

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 210
Author(s):  
Qingwei Ma ◽  
Ying Chen ◽  
Fanghui Wang ◽  
Haowen Li
Keyword(s):  
Atmospheric Deposition ◽  
East China Sea ◽  
Phytoplankton Community ◽  
Marine Phytoplankton ◽  
Subsurface Water ◽  
East China ◽  
Surface Seawater ◽  
The East China Sea ◽  
Chl A ◽  
China Sea

Atmospheric deposition of nutrients to the surface seawater may significantly affect marine phytoplankton growth. Two in situ bioassay experiments were performed in the East China Sea (ECS) by adding nutrients (N, P, and Si) and atmospheric aerosols into the surface seawater. Chlorophyll a (Chl a) concentrations were largely enhanced by simultaneous input of N and P with the maximal increase of 0.68–0.78 μg Chl a per μmol N addition. This Chl a increment was significantly lower (0.19–0.47 μg) in aerosol treatments as a result of initial N-replete condition (N/P ratio ~50) and extremely high N/P ratio in aerosols (>300). Among the multiple influencing factors, atmospheric dry flux of NH4+ + NO3− (AN) was found to be an effective predictor for springtime Chl a in the ECS with a time lag of three days and were strongly correlated with Chl a concentrations on day 3 (r = 0.81, p < 0.001), which might be partly explained by the asynchronous supplies of N (atmospheric deposition) and P (subsurface water). Although dinoflagellates dominated the phytoplankton community in both initial seawaters, additions of P and N + P + Si profoundly enhanced the cell densities and dominance of diatom species Thalassiosira sp. and Nitzschia closterium in the 2012 and 2014 bioassay experiments, respectively. Moreover, the percentage of dinoflagellates were promoted by adding higher NH4+/NO3− ratio (6/4 vs. 1/9) when silicate was at a low concentration (~2 μmol L−1). Atmospheric deposition is likely to be an important N source supporting the high primary production in the ECS and its supply of excess N relative to P may influence dominant phytoplankton groups.

Synergistic Effect of El Niño And The North Pacific Oscillation On Wintertime Precipitation Over Southeastern China And The East China Sea Kuroshio Area

2021 ◽  
Author(s):  
Yue Sun ◽  
Jianping Li
Keyword(s):  
East China Sea ◽  
El Niño ◽  
Interannual Variation ◽  
El Nino ◽  
East China ◽  
North Pacific Oscillation ◽  
The East China Sea ◽  
Southeastern China ◽  
China Sea ◽  
El Niño Event

Abstract Wintertime precipitation in China is most pronounced over the southeastern area, and the Kuroshio in the East China Sea anchors a prominent precipitation band over the warm side of the sea surface temperature front. Previous studies have suggested that many factors contribute to the interannual variation of the precipitation over southeastern China (SC), whereas less attention has been paid to precipitation variability over the East China Sea Kuroshio (ECSK) area. This study focuses on the interannual variation of wintertime precipitation over the SC and ECSK areas. Empirical orthogonal function analysis reveals a spatially uniform pattern from SC to the ECSK area. Composite analysis shows that an El Niño event intensifies wintertime precipitation over our target region, and this effect is tripled when an El Niño follows a positive North Pacific Oscillation (NPO) event in the previous winter. The positive NPO event in the previous winter intensifies the El Niño event via the Victoria mode ocean bridge and the subsequent Bjerknes feedback. In comparison with single-factor El Niño events, a much weaker Walker cell induced by the joint event induces a much weaker regional Hadley cell through anomalous descending motion over the western tropical Pacific. The weakened regional Hadley circulation over the western Pacific directly enhances the precipitation over the SC and ECSK area. In this study, the synergistic effect of an El Niño event and a positive NPO event indicates that the influence of the El Niño event can be amplified by the positive NPO event in the previous winter.

The East China Sea Seafloor Observatory and its upgraded project

2011 ◽  
Author(s):  
Huiping Xu ◽  
Changwei Xu ◽  
Rufu Qin ◽  
Yang Yu ◽  
Shangqin Luo ◽  
...  
Keyword(s):  
East China Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
Seafloor Observatory
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