Oceanological studies in the northwest Pacific, Japan and Okhotsk seas in the 73th cruise of the RV Professor Gagarinskiy and 53th cruise of the RV Academic Oparin

2019 ◽  
Vol 59 (6) ◽  
pp. 1093-1096
Author(s):  
V. N. Karnaukh ◽  
A. F. Sergeev ◽  
V. B. Lobanov ◽  
P. Ya. Tishcenko
Keyword(s):  
Bottom Water ◽  
Japan Sea ◽  
Western Pacific ◽  
Northwest Pacific ◽  
The North ◽  
Water Composition ◽  
Sea Bottom ◽  
The Japan Sea ◽  
North Western ◽  
North Western Pacific

During the the 73th cruise of the RV Professor Gagarinskiy and 53th cruise of the RV Academic Oparin oceanological studies of the north-western Pacific, Japan and Okhotsk Seas were conducted. New data on the structure sea bottom, water composition as well as slope convection of the Japan Sea.

Biodiversity in midwater cnidarians and ctenophores: submersible-based results from deep-water bays in the Japan Sea and north-western Pacific

2005 ◽  
Vol 85 (3) ◽  
pp. 503-517 ◽  
Author(s):  
Dhugal J. Lindsay ◽  
James C. Hunt
Keyword(s):  
Deep Sea ◽  
Japan Sea ◽  
Western Pacific ◽  
Sagami Bay ◽  
Survey Period ◽  
Depth Layer ◽  
Toyama Bay ◽  
The Japan Sea ◽  
North Western ◽  
North Western Pacific

Biodiversity of cnidarian and ctenophore forms in Toyama Bay, Japan Sea, was lower than that in Sagami Bay, north-western Pacific, according to all the indices investigated. Highest richness of forms occurred in the 400—600 m depth layer in Sagami Bay, while in Toyama Bay richness was low in most layers. New forms continued to occur with increasing depth in Sagami Bay but not in Toyama Bay and species composition differed remarkably between the two bays. Putative secondary deep-sea gelatinous forms were identified. Horizontal patchiness in normalized abundances was the rule rather than the exception and for accurate calculations of biodiversity indices incorporating evenness or equitability, the necessity for multiple submersible dives in a single area and survey period was noted. Vertical migration and predation were identified as possible factors contributing to the higher diversity in the 400—600 m depth layer in Sagami Bay.

Little-known arctic species Montacuta spitzbergensis (Bivalvia: Montacutidae) from the north-western Pacific with notes on Montacuta substriata and Tellimya ferruginosa

2008 ◽  
Vol 88 (2) ◽  
pp. 347-356 ◽  
Author(s):  
Gennady M. Kamenev
Keyword(s):  
Sea Of Okhotsk ◽  
First Record ◽  
Western Pacific ◽  
The Arctic ◽  
Arctic Species ◽  
The North ◽  
The Pacific ◽  
The Pacific Ocean ◽  
North Western ◽  
North Western Pacific

An expanded description of a little-known arctic species Montacuta spitzbergensis from the Sea of Okhotsk with new data on its morphology, ecology and geographical distribution is given. This is the first record of M. spitzbergensis from the north-western Pacific. It differs from other species of Montacuta in its large (to 8.4 mm), elongate–ovate, thick shell with wide, slightly curved hinge plate, wide, short, and shallow resilifer, and weakly developed external ligament. This species occurs in the Arctic Ocean (Spitsbergen, Barents, Kara, Laptev and Chukchi Seas) and the Pacific Ocean (Sea of Okhotsk) at depths from 9 to 232 m at a bottom temperature from −1.62°C to +2.50°C. The hinge structure of the type species of the genera Montacuta and Tellimya is also discussed.

First monodontid cetacean (Odontoceti, Delphinoidea) from the early Pliocene of the north‐western Pacific Ocean

2018 ◽  
Vol 5 (2) ◽  
pp. 323-342 ◽  
Author(s):  
Hiroto Ichishima ◽  
Hitoshi Furusawa ◽  
Makino Tachibana ◽  
Masaichi Kimura
Keyword(s):  
Pacific Ocean ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
Early Pliocene ◽  
The North ◽  
North Western ◽  
North Western Pacific

scholarly journals Controlling factor of incoming plate hydration at the north-western Pacific margin

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Gou Fujie ◽  
Shuichi Kodaira ◽  
Yuka Kaiho ◽  
Yojiro Yamamoto ◽  
Tsutomu Takahashi ◽  
...  
Keyword(s):  
Controlling Factor ◽  
Western Pacific ◽  
The North ◽  
Pacific Margin ◽  
North Western ◽  
North Western Pacific

scholarly journals Development of a Biogeochemical and Carbon Model Related to Ocean Acidification Indices with an Operational Ocean Model Product in the North Western Pacific

2019 ◽  
Vol 11 (9) ◽  
pp. 2677 ◽  
Author(s):  
Miho Ishizu ◽  
Yasumasa Miyazawa ◽  
Tomohiko Tsunoda ◽  
Xinyu Guo
Keyword(s):  
Ocean Acidification ◽  
General Circulation ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Ocean Model ◽  
Western Pacific ◽  
Total Alkalinity ◽  
The North ◽  
North Western ◽  
North Western Pacific

We developed a biogeochemical and carbon model (JCOPE_EC) coupled with an operational ocean model for the North Western Pacific. JCOPE_EC represents ocean acidification indices on the background of the risks due to ocean acidification and our model experiences. It is an off-line tracer model driven by a high-resolution regional ocean general circulation model (JCOPE2M). The results showed that the model adequately reproduced the general patterns in the observed data, including the seasonal variability of chlorophyll-a, dissolved inorganic nitrogen/phosphorus, dissolved inorganic carbon, and total alkalinity. We provide an overview of this system and the results of the model validation based on the available observed data. Sensitivity analysis using fixed values for temperature, salinity, dissolved inorganic carbon and total alkalinity helped us identify which variables contributed most to seasonal variations in the ocean acidification indices, pH and Ωarg. The seasonal variation in the pHinsitu was governed mainly by balances of the change in temperature and dissolved inorganic carbon. The seasonal increase in Ωarg from winter to summer was governed mainly by dissolved inorganic carbon levels.

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