Contribution of low-salinity water to sea surface warming of the East China Sea in the summer of 2016

2019 ◽  
Vol 175 ◽  
pp. 68-80 ◽  
Author(s):  
Jae-Hong Moon ◽  
Taekyun Kim ◽  
Young Baek Son ◽  
Ji-Seok Hong ◽  
Joon-Ho Lee ◽  
...  
Keyword(s):  
East China Sea ◽  
Sea Surface ◽  
East China ◽  
The East China Sea ◽  
Surface Warming ◽  
China Sea ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water

Abnormal Sea Surface Warming and Cooling in the East China Sea during Summer

2020 ◽  
Vol 95 (sp1) ◽  
pp. 1505
Author(s):  
Gwang Seob Park ◽  
TaeHee Lee ◽  
Seung-Hwan Min ◽  
Seom-Kyu Jung ◽  
Young Baek Son
Keyword(s):  
East China Sea ◽  
Sea Surface ◽  
East China ◽  
The East China Sea ◽  
Surface Warming ◽  
China Sea

scholarly journals Offshore Detachment Process of the Low-Salinity Water around Changjiang Bank in the East China Sea

2010 ◽  
Vol 40 (5) ◽  
pp. 1035-1053 ◽  
Author(s):  
Jae-Hong Moon ◽  
Naoki Hirose ◽  
Jong-Hwan Yoon ◽  
Ig-Chan Pang
Keyword(s):  
East China Sea ◽  
Tidal Current ◽  
Spring Tide ◽  
Vertical Mixing ◽  
East China ◽  
The East China Sea ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Salinity Water ◽  
Tide Period

Abstract A patchlike structure of low-salinity water detached from the Chanjiang “Diluted Water” (CDW) is frequently observed in the East China Sea (ECS). In this study, the offshore detachment process of CDW into the ECS is examined using a three-dimensional numerical model. The model results show that low-salinity water is detached from the CDW plume by the intense tide-induced vertical mixing during the spring tide period when the tidal current becomes stronger. During the spring tide, thickness of the bottom mixed layer in the sloping bottom around Changjiang Bank reaches the mean water depth, implying that the stratification is completely destroyed in the entire water column. As a result, the offshore detachment of CDW occurs in the sloping side of the bank where the tidal energy dissipation is strong enough to overcome the buoyancy effect during this period. On the other hand, the surface stratification is retrieved during the neap tide period, because the tidal current becomes substantially weaker than that in the spring tide. Wind forcing over the ECS as well as tidal mixing is a critical factor for the detachment process because the surface wind primarily induces a northeastward CDW transport across the shelf region where tide-induced vertical mixing is strong. Moreover, the wind-enhanced cross-isobath transport of CDW causes a larger offshore low-salinity patch, indicating that the freshwater volume of the low-salinity patch closely depends on the wind magnitude.

Spatial Change of Salinity at Kuroshio in East China Sea with Seasons

2011 ◽  
Vol 71-78 ◽  
pp. 56-60 ◽  
Author(s):  
Yan Li ◽  
Jian Cheng Kang ◽  
Chao Liu
Keyword(s):  
East China Sea ◽  
Vertical Mixing ◽  
High Salt ◽  
East China ◽  
China Sea ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Horizontal Stratification ◽  
Salinity Water ◽  
Sea Area

Kuroshio influences hydrological-climate environment of East China Sea by exchanging heat and salinity. It has great influence on climate-environment in East China. Understanding of seasonal variability of salinity at Kuroshio in the East China Sea (ECS Kuroshio) can provide a scientific basis to reveal the climate-environment change in East China. In this paper, Using salinity database of World Ocean Atlas 2009(WOA09) issued by NOAA in 2010, the change of salinity distribution and the high-salt areas at ECS Kuroshio with seasons have been analyzed, the results show that: upper low-salinity water between 0~125m is obviously changing with seasons. From spring to winter, the horizontal stratification at upper low-salinity water first increases and then decreases, but the phenomenon of vertical mixing is opposite with the horizontal stratification. The horizontal stratification is the most obvious in summer, it forms 0.33/m of halocline strength above 10m; the vertical mixing is the strongest in winter, upper low-salinity water mixes with higher-salinity water in Okinawa trough, and salinity is homogenous in vertical above 250m. There are seasonal variations of depth and range of the high-salt areas in different segments along ECS Kuroshio, and there are three high salinity cores in the high-salt areas: two of the high salinity cores appear in the sea area east of Taiwan in autumn and winter, the third core appears in the sea area northwest of Miyako-jima in spring.

scholarly journals Revisit of a Case Study of Spilled Oil Slicks Caused by the Sanchi Accident (2018) in the East China Sea

2021 ◽  
Vol 9 (3) ◽  
pp. 279
Author(s):  
Zhehao Yang ◽  
Weizeng Shao ◽  
Yuyi Hu ◽  
Qiyan Ji ◽  
Huan Li ◽  
...  
Keyword(s):  
East China Sea ◽  
Oil Spill ◽  
Oil Spills ◽  
Ocean Model ◽  
Sea Surface ◽  
East China ◽  
The East China Sea ◽  
Sar Images ◽  
China Sea ◽  
Spatial Coverage

Marine oil spills occur suddenly and pose a serious threat to ecosystems in coastal waters. Oil spills continuously affect the ocean environment for years. In this study, the oil spill caused by the accident of the Sanchi ship (2018) in the East China Sea was hindcast simulated using the oil particle-tracing method. Sea-surface winds from the European Centre for Medium-Range Weather Forecasts (ECMWF), currents simulated from the Finite-Volume Community Ocean Model (FVCOM), and waves simulated from the Simulating WAves Nearshore (SWAN) were employed as background marine dynamics fields. In particular, the oil spill simulation was compared with the detection from Chinese Gaofen-3 (GF-3) synthetic aperture radar (SAR) images. The validation of the SWAN-simulated significant wave height (SWH) against measurements from the Jason-2 altimeter showed a 0.58 m root mean square error (RMSE) with a 0.93 correlation (COR). Further, the sea-surface current was compared with that from the National Centers for Environmental Prediction (NCEP) Climate Forecast System Version 2 (CFSv2), yielding a 0.08 m/s RMSE and a 0.71 COR. Under these circumstances, we think the model-simulated sea-surface currents and waves are reliable for this work. A hindcast simulation of the tracks of oil slicks spilled from the Sanchi shipwreck was conducted during the period of 14–17 January 2018. It was found that the general track of the simulated oil slicks was consistent with the observations from the collected GF-3 SAR images. However, the details from the GF-3 SAR images were more obvious. The spatial coverage of oil slicks between the SAR-detected and simulated results was about 1 km2. In summary, we conclude that combining numerical simulation and SAR remote sensing is a promising technique for real-time oil spill monitoring and the prediction of oil spreading.

scholarly journals Rapid warming of sea surface temperature along the Kuroshio and the China coast in the East China Sea during the 20th century

2021 ◽  
pp. 1-43
Author(s):  
Yoshi N. Sasaki ◽  
Chisato Umeda
Keyword(s):  
20Th Century ◽  
East China Sea ◽  
Sea Surface ◽  
East China ◽  
Model Output ◽  
The East China Sea ◽  
China Sea ◽  
Sst Warming ◽  
The Kuroshio ◽  
China Coast

AbstractIt has been reported that the sea surface temperature (SST) trend of the East China Sea during the 20th century was a couple of times larger than the global mean SST trend. However, the detailed spatial structure of the SST trend in the East China Sea and its mechanism have not been understood. The present study examines the SST trend in the East China Sea from 1901 to 2010 using observational data and a Regional Ocean Modeling System (ROMS) with an eddy-resolving horizontal resolution. A comparison among two observational datasets and the model output reveal that enhanced SST warming occurred along the Kuroshio and along the coast of China over the continental shelf. In both regions, the SST trends were the largest in winter. The heat budget analysis using the model output indicates that the upper layer temperature rises in both regions were induced by the trend of ocean advection, which was balanced to the increasing of surface net heat release. In addition, the rapid SST warming along the Kuroshio was induced by the acceleration of the Kuroshio. Sensitivity experiments revealed that this acceleration was likely caused by the negative wind stress curl anomalies over the North Pacific. In contrast, the enhanced SST warming along the China coast resulted from the ocean circulation change over the continental shelf by local atmospheric forcing.

Sign in / Sign up

Export Citation Format

Share Document