Age and growth of the Pacific halibut Hippoglossus stenolepis and the size-age composition of its catches in the North-Western part of the Pacific Ocean

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.

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The general circulation of the Pacific Ocean and a brief account of the oceanographic structure of the North Pacific Ocean Part I ‐ circulation and volume transports

Atmosphere ◽

10.1080/00046973.1975.9648394 ◽

1975 ◽

Vol 13 (4) ◽

pp. 133-168 ◽

Cited By ~ 39

Author(s):

S. Tabata

Keyword(s):

Pacific Ocean ◽

North Pacific ◽

General Circulation ◽

North Pacific Ocean ◽

The North ◽

The Pacific ◽

The Pacific Ocean ◽

The North Pacific ◽

Volume Transports

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Biogeochemistry of the North Atlantic during oceanic anoxic event 2: role of changes in ocean circulation and phosphorus input

Biogeosciences ◽

10.5194/bg-11-977-2014 ◽

2014 ◽

Vol 11 (4) ◽

pp. 977-993 ◽

Cited By ~ 15

Author(s):

I. Ruvalcaba Baroni ◽

R. P. M. Topper ◽

N. A. G. M. van Helmond ◽

H. Brinkhuis ◽

C. P. Slomp

Keyword(s):

Pacific Ocean ◽

Ocean Circulation ◽

North Atlantic ◽

Primary Productivity ◽

Low Oxygen ◽

Deep Basin ◽

The North ◽

The Pacific ◽

The Pacific Ocean ◽

The North Atlantic

Abstract. The geological record provides evidence for the periodic occurrence of water column anoxia and formation of organic-rich deposits in the North Atlantic Ocean during the mid-Cretaceous (hereafter called the proto-North Atlantic). Both changes in primary productivity and oceanic circulation likely played a role in the development of the low-oxygen conditions. Several studies suggest that an increased input of phosphorus from land initiated oceanic anoxic events (OAEs). Other proposed mechanisms invoke a vigorous upwelling system and an ocean circulation pattern that acted as a trap for nutrients from the Pacific Ocean. Here, we use a detailed biogeochemical box model for the proto-North Atlantic to analyse under what conditions anoxia could have developed during OAE2 (94 Ma). The model explicitly describes the coupled water, carbon, oxygen and phosphorus cycles for the deep basin and continental shelves. In our simulations, we assume the vigorous water circulation from a recent regional ocean model study. Our model results for pre-OAE2 and OAE2 conditions are compared to sediment records of organic carbon and proxies for photic zone euxinia and bottom water redox conditions (e.g. isorenieratane, carbon/phosphorus ratios). Our results show that a strongly elevated input of phosphorus from rivers and the Pacific Ocean relative to pre-OAE2 conditions is a requirement for the widespread development of low oxygen in the proto-North Atlantic during OAE2. Moreover, anoxia in the proto-North Atlantic is shown to be greatly influenced by the oxygen concentration of Pacific bottom waters. In our model, primary productivity increased significantly upon the transition from pre-OAE2 to OAE2 conditions. Our model captures the regional trends in anoxia as deduced from observations, with euxinia spreading to the northern and eastern shelves but with the most intense euxinia occurring along the southern coast. However, anoxia in the central deep basin is difficult to achieve in the model. This suggests that the ocean circulation used in the model may be too vigorous and/or that anoxia in the proto-North Atlantic was less widespread than previously thought.

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IX. Contributions to terrestrial magnetism.—No. IV

Philosophical Transactions of the Royal Society of London ◽

10.1098/rstl.1843.0010 ◽

1843 ◽

Vol 133 ◽

pp. 113-143 ◽

Cited By ~ 2

Keyword(s):

Pacific Ocean ◽

West Coast ◽

China Seas ◽

North West ◽

The North ◽

The Pacific ◽

The Pacific Ocean ◽

The Times ◽

The China Seas

In the present number of these Contributions, I resume the consideration of Captain Sir Edward Belcher’s magnetic observations, of which the first portion, viz. that of the stations on the north-west coast of America and adjacent islands, was discussed in No. II. The return to England of Her Majesty’s ship Sulphur by the route of the Pacific Ocean, and her detention for some months in the China Seas, have enabled Sir Edward Belcher to add magnetic determinations at thirty-two stations to those at the twenty-nine stations previously recorded. In the notice of the earlier observations, a provisional coefficient was employed in the formula for the temperature corrections of the results with the intensity needles, as no experiments had then been made for the determination of their individual coefficients. As soon therefore as Sir Edward Belcher had completed the observation of the times of vibration of those needles at Woolwich, as the concluding station of the series made with them, Lieut. Riddell, R. A. undertook the determination of their several coefficients, which was performed in the manner and with the results described in the subjoined memorandum.

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The general circulation of the pacific ocean and a brief account of the oceanographic structure of the north pacific ocean: Part II — Thermal regime and influence on the climate

Atmosphere ◽

10.1080/00046973.1976.9648398 ◽

1976 ◽

Vol 14 (1) ◽

pp. 1-27 ◽

Cited By ~ 6

Author(s):

S. Tabata

Keyword(s):

Pacific Ocean ◽

Thermal Regime ◽

North Pacific ◽

General Circulation ◽

North Pacific Ocean ◽

The North ◽

The Pacific ◽

The Pacific Ocean ◽

The North Pacific

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Contributions to terrestrial magnetism

Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London ◽

10.1098/rspl.1837.0235 ◽

1843 ◽

Vol 4 ◽

pp. 465-465 ◽

Cited By ~ 1

Keyword(s):

Pacific Ocean ◽

West Coast ◽

Thin Layers ◽

China Seas ◽

Magnetic Intensity ◽

North West ◽

The North ◽

The Pacific ◽

The Pacific Ocean ◽

The China Seas

In the present number of these contributions, the author resumes the consideration of Captain Sir Edward Belcher’s magnetic observations, of which the first portion, namely, that of the stations on the north-west coast of America and its adjacent islands, vas discussed in No. 2. The return to England of H. M. S. Sulphur by the route of the Pacific Ocean, and her detention for some months m the China Seas, have enabled Sir Edward Belcher to add magnetic determinations at thirty-two stations to those at the twenty-nine stations previously recorded. The author first describes the experiments which he instituted with the different needles employed by Captain Sir Edward Belcher for determining the coefficient to be employed in the formula for the temperature corrections; and takes this opportunity of noticing the singular fact that, in needles made of a particular species of Russian steel, this coefficient is negative; that is, in these needles, an increase of temperature increases the magnetic power. M. Adolphe Erman describes this particular kind of steel as consisting of alternate very thin layers of soft iron and of steel, so that when heated the soft iron layers increase their magnetic intensity and the steel layers diminish theirs.

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