The Variations of the Abundance and Distribution Pattern of Calanus sinicus Brodsky in the Western South Yellow Sea in Spring and Summer

2012 ◽  
Vol 573-574 ◽  
pp. 1145-1155
Author(s):  
Xiao Wang ◽  
Zong Ling Wang
Keyword(s):  
Distribution Pattern ◽  
Yellow Sea ◽  
Water Mass ◽  
Cold Water ◽  
South Yellow Sea ◽  
Calanus Sinicus ◽  
Yellow Sea Warm Current ◽  
The Past ◽  
Abundance And Distribution ◽  
Hydrological Parameter

Multidisciplinary comprehensive investigations were conducted in the western South Yellow Sea in the summer, 2006 and spring, 2007. The abundance and distribution pattern of a dominant zooplankton species, Calanus sinicus, and its relationship with the environmental conditions are analyzed. The data of C. sinicus and hydrological parameter in the spring and summer of 1959 are used to compare the variations of C. sinicus and hydrographical conditions in the past 50 years. Results show that the abundance of C. sinicus was significantly higher in 2006 and 2007 than that in 1959 which may be correlate with both the bottom-up and top-down effects; the distribution pattern in the spring of the two years was similar, on the contrary, However, the hydrographical characteristics were conspicuously different between the two springs, for example, the coverage and strength of the Qingdao Cold Water Mass, the penetrating pathway of Yellow Sea Warm Current and the distribution pattern of the oceanic front. Correspondingly, the distribution pattern of C. sinicus in the summer of the two years showed great differences. Thus, it is suggested that the distribution pattern of C. sinicus in summer might be influenced by the hydrographical characteristics in spring, which probably further affects the present of some economically important fishes which fed on C. sinicus.

Impact of cold water mass on suspended sediment transport in the South Yellow Sea

2020 ◽  
Vol 428 ◽  
pp. 106244 ◽  
Author(s):  
Yi Zhong ◽  
Lulu Qiao ◽  
Dehai Song ◽  
Yang Ding ◽  
Jishang Xu ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Suspended Sediment ◽  
Yellow Sea ◽  
Water Mass ◽  
Cold Water ◽  
Suspended Sediment Transport ◽  
South Yellow Sea ◽  
The South ◽  
Cold Water Mass ◽  
The South Yellow Sea

Spatio-temporal distribution pattern of Calanus sinicus and its relationship with climate variability in the northern Yellow Sea

2017 ◽  
Vol 75 (2) ◽  
pp. 764-772
Author(s):  
Qing Yang ◽  
Hui Liu ◽  
Guize Liu ◽  
Yanbin Gu
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Yellow Sea ◽  
Cold Water ◽  
Temporal Distribution ◽  
Zooplankton Community ◽  
Central Portion ◽  
Calanus Sinicus ◽  
Northern Yellow Sea ◽  
Spatio Temporal

Abstract The spatio-temporal distribution pattern of Calanus sinicus, a key copepod species, was examined in the northern Yellow Sea (YS). Compared with 1959 and 1982, there was a significant increase in the abundance of C. sinicus in the spring, summer, and autumn of 2011 and winter of 2014. The percentage of C. sinicus in the zooplankton assemblages ranging from 45.6 to 75.8% in different seasons of 2011-2014 was significantly higher than that in 1982. Two different spatial distribution patterns of C. sinicus were observed, with higher abundance occurring nearshore during the cold season (e.g. January) and offshore in the central portion of the northern YS in the warm season (e.g. May, July, and October). The YS Cold Water Mass in the central portion of the northern YS likely provides an important over-summering site for the species. Additionally, a greater increase of the abundance of C. sinicus was found in the northern portion (the northern YS) of its spatial distribution during the past half century. This study has an implication on the climate-driven shifts in zooplankton community in the northern YS, highlighting the importance of C. sinicus in the warm-temperate ecosystem of Chinese coastal seas.

scholarly journals Interannual to Interdecadal Variability of the Southern Yellow Sea Cold Water Mass and Establishment of “Forcing Mechanism Bridge”

2021 ◽  
Vol 9 (12) ◽  
pp. 1316
Author(s):  
Yunxia Guo ◽  
Dongxue Mo ◽  
Yijun Hou
Keyword(s):  
Yellow Sea ◽  
Water Mass ◽  
Decadal Variability ◽  
Cold Water ◽  
Southern Oscillation ◽  
Surface Air Temperature ◽  
The Yellow Sea ◽  
The Arctic ◽  
Yellow Sea Warm Current ◽  
Cold Water Mass

The Yellow Sea cold water mass (YSCWM) occupies a wide region below the Yellow Sea (YS) thermocline in summer which is the most conservative water and may contain clearer climate signals than any other water masses in the YS. This study investigated the low-frequency variability of the southern YSCWM (SYSCWM) and established the “forcing mechanism bridge” using correlation analysis and singular value decomposition. On the interannual timescale, the southern oscillation can affect the SYSCWM through both the local winter monsoon (WM) and the sea surface net heat flux. On the decadal timescale, the Pacific decadal oscillation (PDO) can affect the SYSCWM via two “bridges”. First, the PDO affects the SYSCWM intensity by Aleutian low (AL), WM, and surface air temperature (SAT). Second, the PDO affects the SYSCWM by AL, WM, Kuroshio heat transport, and Yellow Sea warm current. The Arctic oscillation (AO) affects the SYSCWM by the Mongolian high, WM, and SAT. Before and after the 1980s, the consistent phase change of the PDO and the AO contributed to the significant decadal variability of the SYSCWM. Finally, one simple formula for predicting the decadal variability of SYSCWM intensity was established using key influencing factors.

scholarly journals Vertical Fine-Scale Distribution of Calanus sinicus in the Yellow Sea Cold Water Mass During the Over-Summering Process

2021 ◽  
Vol 8 ◽  
Author(s):  
Jun Pan ◽  
Fangping Cheng ◽  
Fei Yu ◽  
Yongqiang Shi ◽  
Fan Sun ◽  
...  
Keyword(s):  
Yellow Sea ◽  
Diel Vertical Migration ◽  
Water Mass ◽  
Cold Water ◽  
Early Summer ◽  
The Yellow Sea ◽  
Fine Scale ◽  
Calanus Sinicus ◽  
Chl A ◽  
Hot Surface

Calanus sinicus, a temperate copepod with a lethal temperature >27°C, is one of the key species in Chinese coastal marine ecosystems. The C. sinicus population increases in spring and declines in early summer annually due to increasing water temperature. Numerous C. sinicus individuals then congregate in the Yellow Sea Cold Water Mass (YSCWM) and remain under the thermocline from early summer to early autumn. Development and reproduction is halted in this cold and foodless bottom water and they avoid ascending to the hot surface water, which is regarded as an over-summering strategy. Based on discrete water sampling approaches, previous studies demonstrated that higher chlorophyll a (Chl a) levels appeared in the mixed hot surface water layer; however, the subsurface chlorophyll a maximum layer (SCML) has seldom been described. In the present study, various probes and a visual plankton recorder (VPR) were used to determine the fine vertical distributions of environmental factors and C. sinicus. VPR observations showed the ecological responses in fine scale and indicated that few C. sinicus individuals ascend at night, the main population preferred to remain below the SCML all day long. The results demonstrated that a constant thin SCML existed in the YSCWM area, and that the SCML location coincided with or was beneath the thermocline and halocline layers, where the temperature was suitable for C. sinicus. The relationship between abundance and Chl a, showed the diel vertical migration trend of C. sinicus to feed at night in the YSCWM area. In addition to temperature as a main influencing factor, dissolved oxygen concentrations and column depth were also influencing factors. Therefore, in addition to avoiding high surface temperature, energy supplement may be an important driving force confining the diel vertical migration of C. sinicus in the Yellow Sea in summer.

DISTRIBUTION PATTERN OF CLAY MINERALS IN SURFACE SEDIMENTS OF SOUTH YELLOW SEA AND THEIR PROVENANCE

2011 ◽  
Vol 31 (3) ◽  
pp. 11-16 ◽  
Author(s):  
Xianhong LAN ◽  
Xianjun ZHANG ◽  
Xinbo LIU ◽  
Rihui LI ◽  
Zhixun ZHANG
Keyword(s):  
Distribution Pattern ◽  
Clay Minerals ◽  
Yellow Sea ◽  
Surface Sediments ◽  
South Yellow Sea

Revealing the Subsurface Yellow Sea Cold Water Mass from Satellite Data Associated with Typhoon Muifa

2019 ◽  
Vol 124 (10) ◽  
pp. 7135-7152
Author(s):  
Yang Yang ◽  
Kuiping Li ◽  
Jianting Du ◽  
Yanliang Liu ◽  
Lin Liu ◽  
...  
Keyword(s):  
Satellite Data ◽  
Yellow Sea ◽  
Water Mass ◽  
Cold Water ◽  
Cold Water Mass
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