scholarly journals Effects of Japan Sea Proper Water on the growth ofLegionella pneumophila, Escherichia coli, andStaphylococcus aureus

2005 ◽  
Vol 10 (5) ◽  
pp. 233-238 ◽  
Author(s):  
Yasuo Tsuchiya ◽  
Michihiro Terao ◽  
Takanori Fujimoto ◽  
Kazutoshi Nakamura ◽  
Masaharu Yamamoto
Keyword(s):  
Escherichia Coli ◽  
Japan Sea ◽  
Japan Sea Proper Water

Effects of Japan Sea Proper Water on the Growth of Legionella pneumophila, Escherichia coli, and Staphylococcus aureus

2005 ◽  
Vol 10 (5) ◽  
pp. 233-238 ◽  
Author(s):  
Yasuo TSUCHIYA ◽  
Michihiro TERAO ◽  
Takanori FUJIMOTO ◽  
Kazutoshi NAKAMURA ◽  
Masaharu YAMAMOTO
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Legionella Pneumophila ◽  
Japan Sea ◽  
Japan Sea Proper Water ◽  
And Staphylococcus Aureus

scholarly journals The Japan Sea Proper Water and Water Circulation in the Japan Sea.

1993 ◽  
Vol 44 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Katsunobu Nishiyama ◽  
Masaru Inagawa ◽  
Takanori Mizuno
Keyword(s):  
Japan Sea ◽  
Water Circulation ◽  
Japan Sea Proper Water ◽  
The Japan Sea

New insights into the latitudinal ventilation variations in the Japan Sea since the Last Glacial Maximum: A radiolarian assemblage perspective

2020 ◽  
Author(s):  
Zhi Dong ◽  
Xuefa Shi ◽  
Jianjun Zou ◽  
Yanguang Liu ◽  
Ruxi Dou ◽  
...  
Keyword(s):  
Deep Water ◽  
Coastal Upwelling ◽  
Sediment Cores ◽  
Japan Sea ◽  
Volume Transport ◽  
The North ◽  
Radiolarian Assemblage ◽  
Basin Scale ◽  
Japan Sea Proper Water ◽  
The Japan Sea

<p>The formation of intermediate and deep water plays a key role in regulating climate changes at a variety of time scales through the heat redistribution and carbon cycling. The Japan Sea has unique water-mass characteristics in the North Pacific with its own deep-water formation within the Sea itself called Japan Sea Proper Water (JSPW). Latitudinal ventilation changes in the Japan Sea were reconstructed using radiolarian assemblage from three sediment cores, extending from the southwestern, central to northwestern Japan Sea. Here, we present downcore faunal records spanning the last 25 ka as well as other existing ventilation records in the Japan Sea, and provide reliable evidence to evaluate the potential controlling mechanism that lead to onset and interruption of JSPW ventilation. Taking all together, we argue that radiolarian assemblage records have revealed a distinct basin-scale transition in deep-water conditions from anoxic to oxic during the deglaciation related to changing surface hydrography. However, it should be recognized that there is significant potential for bias in the timing of the ventilation changes among regions. Deep ventilation in the central Japan Sea has been in an interglacial mode during the Bølling/Allerød presumably related to northward volume transport of the Tsushima Warm Current. Moreover, the decrease of JSPW Assemblage at the B/A in southwestern Japan Sea was attributed to higher export productivity, facilitating suboxic deepwater condition through enhanced consumption of oxygen, which was probably caused by coastal upwelling. In contrast, the weakening ventilation of the northwestern Japan Sea during the B/A and YD periods was probably caused by the blocking effect of the sea ice. Note: This study was supported by the National Natural Science Foundation of China (Grant No. 41420104005, U1606401) and National Program on Global Change and Air-Sea Interaction (GASI-GEOGE-04).</p>

scholarly journals Acidification and Deoxygenation of the Northwestern Japan/East Sea

2021 ◽  
Vol 9 (9) ◽  
pp. 953
Author(s):  
Pavel Tishchenko ◽  
Vyacheslav Lobanov ◽  
Dmitry Kaplunenko ◽  
Sergey Sagalaev ◽  
Petr Tishchenko
Keyword(s):  
Dissolved Inorganic Carbon ◽  
Empirical Relationship ◽  
Peter The Great Bay ◽  
Japan Sea ◽  
East Sea ◽  
Total Alkalinity ◽  
Nutrient Concentrations ◽  
Northwestern Part ◽  
Rate Of Increase ◽  
Japan Sea Proper Water

Seasonal hypoxia in the bottom waters of the Peter the Great Bay (PGB) of the Japan/East Sea (JES) occurs in summer. Using the empirical relationship between dissolved oxygen (DO) and pH obtained for hypoxic conditions and available historical DO data, acidification rates were estimated. Carefully sampled time-series observations from the northwestern part of the JES, carried out from 1999 to 2014 along the 132°20′ E and 134°00′ E longitudes, were chosen to determine the interannual variability of the sea’s hydrochemical parameters (DO, pH, and TA—the total alkalinity phosphates, nitrate, and silicates). To limit the effects of seasonal and spatial variability, only data obtained in the warm period were used. Additionally, all data from depths shallower than 500 m were discarded because they are affected by high natural variability, mostly due to strong mesoscale dynamic structures. Our results demonstrated that the pH and DO concentrations measured in the Upper Japan Sea Proper Water (750 m), Lower Japan Sea Proper Water (1250, 1750, 2250 m), and Bottom Water (3000 m) have been decreasing in recent years. On the other hand, calculated normalized dissolved inorganic carbon (NDIC), CO2 partial pressure (pCO2), and measured nutrient concentrations have been increasing. Maximum rates of acidification and deoxygenation are occurring at around 750 m. The annual rate of increase of pCO2 in the water exceeds the atmospheric rate more than 2-fold at a depth of 750 m. The observed variability of the hydrochemical properties can be explained by the combination of the slowdown ventilation of the vertical water column and eutrophication. However, the results obtained here are valid for the subpolar region of the JES, not for the whole sea. The synchronization of the deoxygenation of the open part of the JES and PGB has been found.

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