Styles of mesoscale brittle deformations associated with the Miocene folding of the Taishu Group, Tsushima, between the Japan Sea and East China Sea backarc basins

Island Arc ◽  
2021 ◽  
Author(s):  
Atsushi Yamaji ◽  
Tatsuhiko Yanagisawa ◽  
Katsushi Sato
Keyword(s):  
East China Sea ◽  
Japan Sea ◽  
East China ◽  
China Sea ◽  
The Japan Sea ◽  
Backarc Basins

scholarly journals Temporal Variations of Polycyclic Aromatic Hydrocarbons in the Seawater at Tsukumo Bay, Noto Peninsula, Japan, during 2014–2018

2020 ◽  
Vol 17 (3) ◽  
pp. 873 ◽  
Author(s):  
Tetsuya Matsunaka ◽  
Seiya Nagao ◽  
Mutsuo Inoue ◽  
Rodrigo Mundo ◽  
Ning Tang ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East China Sea ◽  
Aromatic Hydrocarbons ◽  
Japan Sea ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
The Japan Sea ◽  
Polycyclic Aromatic ◽  
The Impact

Concentrations of phase-partitioning 13 polycyclic aromatic hydrocarbons (PAHs) in seawater were investigated in the Tsukumo Bay, Noto Peninsula, Japan, during 2014–2018, to improve the understanding of the environmental behavior of PAHs in the coastal areas of the Japan Sea. Total PAH (particulate plus dissolved) concentrations in surface seawater were in the range 0.24–2.20 ng L−1 (mean 0.89 ng L−1), an order of magnitude lower than the mean values observed in the Japan Sea in 2008 and 2010. Although the PAH contamination levels during 2014–2018 were significantly lower than those in the East China Sea, the levels increased from 2014 to 2017 and were maintained at the higher level during 2017–2018. The main sources of particulate and dissolved PAHs during 2014–2018 were combustion products, of which the former were more influenced by liquid fossil-fuel combustion and the latter by biomass or coal combustion. The increase in particulate PAH concentrations in October–December during 2014–2018 was due to the impact of PAH-rich airmasses transported from the East Asian landmass in the northwesterly winter monsoon winds. The increase in dissolved PAH levels during July–September in 2014, 2016, 2017, and 2018 indicates that the Tsukumo Bay is possibly impacted by the PAH-rich summer continental shelf water transported by the Coastal Branch of the Tsushima Warm Current, which flows into the Japan Sea from the East China Sea.

scholarly journals <i>Sanyuania cuneata</i> Zhao & Whatley, 1992 (Ostracoda, Cytheroidea, Cytherideidae) from Japan: morphology, distribution and environmental significance

2006 ◽  
Vol 25 (2) ◽  
pp. 187-188 ◽  
Author(s):  
Gengo Tanaka
Keyword(s):  
East China Sea ◽  
Japan Sea ◽  
The Yellow Sea ◽  
East China ◽  
The Sea Of Japan ◽  
Environmental Significance ◽  
China Sea ◽  
Musculista Senhousia ◽  
Lake Nakaumi ◽  
Practical Salinity Unit

Abstract. Sanyuania cuneata Zhao &amp; Whatley, 1992 was reported initially from Late Pleistocene core samples from the northern part of the Yellow Sea and Recent sediments collected from supra tidal pools (17 practical salinity unit (psu)) in Xiangshangang Bay, East China Sea (Zhao &amp; Whatley, 1992). Later, specimens were discovered, but not identified, in Lake Nakaumi, Shimane Prefecture, SW Japan (Fig. 1) (as Cytheridae gen. et. sp. indet. by Tanaka et al. (1998) and Sanyuania sp. by Seto et al. (1999)). Further examination of these Japanese specimens has clarified that they are conspecific with the Chinese specimens. This has provided an opportunity to review the distribution (Fig. 1) and potential environmental significance of Sanyuania cuneata and, for the first time, to describe its appendages (Fig. 2).Specimens figured herein were recovered from Lake Nakaumi (35°26′ 50″ N, 133°07′50″ E) at a depth of 0.3–6.0 m and salinity of 8–17 psu on 9 September 1998. The surface of the sediment was covered by the byssus of the mussel Musculista senhousia (Benson, 1842).Sanyuania cuneata is probably endemic to the East China Sea and the southwestern part of the Sea of Japan and is a potentially useful palaeoenvironmental indicator of brackish (steno-haline) environments in the area. By using the oxygen isotopic data from planktonic foraminifers and the estimated value of salinity flowing into the Japan Sea, Matsui et al. (1998) approximated that the salinity of the surface water of Japan Sea declined to about 20 psu during the Last Glacial Maximum . . .

Sign in / Sign up

Export Citation Format

Share Document