Mercury in the Kuroshio and Oyashio regions and the Japan Sea

Nature ◽  
1975 ◽  
Vol 258 (5532) ◽  
pp. 224-225 ◽  
Author(s):  
K. MATSUNAGA ◽  
M. NISHIMURA ◽  
S. KONISHI
Keyword(s):  
Japan Sea ◽  
The Japan Sea ◽  
The Kuroshio

scholarly journals Unusually high sea level at the south coast of Japan in September 2011 induced by the Kuroshio

2020 ◽  
Author(s):  
Norihisa Usui ◽  
Koji Ogawa ◽  
Kei Sakamoto ◽  
Hiroyuki Tsujino ◽  
Goro Yamanaka ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Tide Gauge ◽  
Phase Speed ◽  
Japan Sea ◽  
South Coast ◽  
The South ◽  
Characteristic Analysis ◽  
The Japan Sea ◽  
The Kuroshio

Abstract Using a coastal assimilation model, generation mechanism of unusually high sea level (UHSL) at the south coast of Japan in September 2011 is investigated. Both model results and tide gauge observations indicate that sea level rise associated with the UHSL event occurred twice in the middle and end of September. The first one, which is localized around the eastern part of the Seto Inland Sea, is caused by a cyclonic circulation in the Kii Channel formed as a result of northward migration of the Kuroshio axis toward Cape Shionomisaki. The second sea level rise, which is the main contributor to this UHSL event, is observed in wide areas not only at the south coast of Japan, but also at the coast of the Japan Sea. It is brought about by a coastal trapped wave (CTW) induced as a result of a fluctuation of the Kuroshio path to the south of the Boso Peninsula. The CTW with positive SSH anomalies propagates westward along the south coast of Japan, and then goes into the coast of the Japan Sea. Sensitivity experiments and a modal characteristic analysis indicate that the CTW is mainly characterized by the first mode baroclinic Kelvin wave. The phase speed for the first mode is calculated at 2.96 m s$$^{-1}$$ - 1 , which compares well with that estimated by tide gauge observations.

scholarly journals Statistical Characteristics and Composite Environmental Conditions of Explosive Cyclones over the Japan Sea and Kuroshio/Kuroshio Extension

Atmosphere ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 17
Author(s):  
Shuqin Zhang ◽  
Gang Fu ◽  
Yu Zhang ◽  
Jianjun Xu ◽  
Yufeng Xue ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Kuroshio Extension ◽  
Japan Sea ◽  
Early Spring ◽  
Statistical Characteristics ◽  
Synoptic Scale ◽  
Explosive Cyclones ◽  
The Japan Sea ◽  
Upper Level Jet ◽  
The Kuroshio

Statistical characteristics and composite synoptic-scale environmental conditions of explosive cyclones (ECs) over the Japan Sea and Kuroshio/Kuroshio Extension are examined and compared using ERA5 atmospheric reanalysis to give a better understanding of their differences. ECs over the Japan Sea frequently occur in late autumn and early winter and those over the Kuroshio/Kuroshio Extension mainly occur in winter and early spring. The maximum deepening rate, minimum central sea level pressure and explosive-developing lifetime of ECs over the Kuroshio/Kuroshio Extension are generally larger, lower and longer, respectively, than those over the Japan Sea. ECs over the Kuroshio/Kuroshio Extension formed over the East China Sea tend to develop more rapidly, and weak and moderate ECs generally begin to develop explosively over the sea to the east of the Japan Islands, while the strong and super ECs over the sea to the south of Japan Islands have longer explosive-developing tracks. Composite analysis shows that synoptic-scale environmental conditions favoring rapid EC development over these two regions are significantly different. ECs over the Japan Sea have stronger baroclinicity and cyclonic vorticity, but weaker water vapor convergence and upper-level jet stream than those over the Kuroshio/Kuroshio Extension. The key factor contributing to the baroclinicity is the cold air intrusion over the Japan Sea and the strong warm current heating over the Kuroshio/Kuroshio Extension. The potential vorticity shows anomalies in upper and low levels for both EC areas and extends further downwards over the Japan Sea.

Some Aspects of Japan Sea Trade in the Tokugawa Period

1964 ◽  
Vol 23 (3) ◽  
pp. 405-416 ◽  
Author(s):  
Robert G. Flershem
Keyword(s):  
Seventeenth Century ◽  
Japan Sea ◽  
Permanent Residence ◽  
Tokugawa Period ◽  
The Japan Sea

It is reasonable to assume that Kaga han, in view of its size, large rice and other exports, and central coastal location, provided the lion's share of ships and shipowners operating in the Japan Sea during the two centuries before Perry. Villagers were going from Noto to North Honshu and Hokkaido both for temporary occupation and for permanent residence in the mid-seventeenth century and diereafter; and some of these emigrants became useful Kaga han trade agents. Moreover, transport of rice and salt respectively to Tsuruga and Echigo from Noto villages early in the Tokugawa period can be documented. Kaga han needed an all-water route to Osaka because of the high cost of transshipping rice by land from Tsuruga to Osaka. This may have been the main reason for the development in the latter part of the seventeenth century of nishi mawari, the route for ships going from the Japan Sea through the Inland Sea.

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