A complementary note on “nonlinearity of the horizontal velocity field under wind-waves”     

Norihisa Imasato  Hiroshi Ichikawa 《Journal of Oceanography》1977,33(6):340-341

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Use of an optical oxygen sensor to measure dissolved oxygen in seawater     

Hiroshi Hasumoto  Tsuneo Imazu  Toshiaki Miura  Kazuhiro Kogure 《Journal of Oceanography》2006,62(1):99-103

The use of an optical oxygen sensor to measure dissolved oxygen in seawater was investigated. The sensor is based on the dynamic quenching of an oxygen-sensitive fluorochrome embedded in the tip. Dissolved oxygen in seawater samples collected from eight stations at depths ranging from 3000 to 6000 m was analyzed both with the optical sensor and by the Winkler titration method. The two sets of data did not differ significantly. The stability and simplicity of the method and the good agreement of the results with those of the titration method indicate that the sensor would be useful for fieldwork.  相似文献   

On the Polyps of the Common Jellyfish Aurelia aurita in Kagoshima Bay   总被引：1，自引：0，他引：1  

Hiroshi Miyake  Makoto Terazaki  Yoshiko Kakinuma 《Journal of Oceanography》2002,58(3):451-459

There is the natural habitat of polyps of the common jellyfish Aurelia aurita in the Taniyama area, Kagoshima Bay. We examined the attachment substrata, density, colony structure and strobilation of the polyps. The polyps were observed only on the horizontal undersurface of floating piers. They attached specifically to Mytilus shells, solitary ascidians, calcareous polychaete tubes, muddy amphipod tubes and the gap space that fouling animals peeled off the substrata. The polyp colonies were distributed in patches. Spatial distribution patterns of the polyps within their colonies were uniform. Strobilation occurred during late December to March, when water temperatures were 16–17°C, and a large number of ephyrae were released. An increase in man-made structures such as floating piers in coastal areas may lead to bloomings of Aurelia aurita medusae. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Standing stocks and production rates of phytoplankton and planktonic copepods in the Inland Sea of Japan   总被引：1，自引：0，他引：1  

Shin-ichi Uye  Hiroshi Kuwata  Takuo Endo 《Journal of Oceanography》1986,42(6):421-434

Standing stocks and production rates of phytoplankton and planktonic copepods were investigated at 15 stations in the Inland Sea of Japan during four cruises in October–November 1979, January, April and June 1980. The overall mean of phytoplankton biomass was relatively constant during the study period, ranging from 2.3 mg chl.a m^–3 in April to 3.6 mg chl.a m^–3 in October–November. Primary production was low in January (mean: 90 mg C m^–2 d^–1), but higher than 375 mg C m^–2 d^–1 on the other occasions. Integrated annual primary production was 122 g C m^–2 yr^–1. In terms of carbon weight,Paracalanus parvus was the most important copepod species. The variation of the mean copepod biomass (range: 7.6 mg C m^–3 in April to 20.2 mg C m^–3 in June) was smaller than that of copepod production, which was estimated by the Ikeda-Motoda's physiological method. Copepod producion was low in cold seasons (0.6 and 0.9 mg C m^–3 d^–1 in January and April, respectively), and increased, following the elevation of primary production, to 4.9 mg C m^–3 d^–1 in June. Annual copepod production was 33.7 g C m^–2 yr^–1, of which herbivore (secondary) production was 26.4 g C m^–2 yr^–1 (21.7% of primary production). The ratios of pelagic planktivorous fish catch and total fish catch to the primary production were 0.82 and 1.8%, respectively, indicating very high efficiency in exploiting fishery resources in the Inland Sea of Japan.  相似文献   

The Current System in the Yellow and East China Seas   总被引：18，自引：1，他引：18  

Hiroshi Ichikawa  Robert C. Beardsley 《Journal of Oceanography》2002,58(1):77-92

During the 1990s, our knowledge and understanding of the current system in the Yellow and East China Seas have grown significantly due primarily to new technologies for measuring surface currents and making high-resolution three-dimensional numerical model calculations. One of the most important new findings in this decade is direct evidence of the northward current west of Kyushu provided by satellite-tracked surface drifters. In the East China Sea shelf region, these recent studies indicate that in winter the Tsushima Warm Current has a single source, the Kuroshio Branch Current in the west of Kyushu, which transports a mixture of Kuroshio Water and Changjiang River Diluted Water northward. In summer the surface Tsushima Warm Current has multiple sources, i.e., the Taiwan Warm Current, the Kuroshio Branch Current to the north of Taiwan, and the Kuroshio Branch Current west of Kyushu. The summer surface circulation pattern in the East China Sea shelf region changes year-to-year corresponding to interannual variations in Changjiang River discharge. Questions concerning the Yellow Sea Warm Current, the Chinese Coastal Current in the Yellow Sea, the current field southwest of Kyushu, and the deep circulation in the Okinawa Trough remain to be addressed in the next decade. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

Long-term monitoring of bottom environments of the continental slope off Otsuchi Bay,northeastern Japan     

Kazumasa Oguri  Yasuo Furushima  Takashi Toyofuku  Takafumi Kasaya  Masahide Wakita  Shuichi Watanabe  Katsunori Fujikura  Hiroshi Kitazato 《Journal of Oceanography》2016,72(1):151-166

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Characterisation of water-soluble organic aerosols at a site on the southwest coast of India     

Prashant Hegde  Kimitaka Kawamura  I. A. Girach  Prabha R. Nair 《Journal of Atmospheric Chemistry》2016,73(2):181-205

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Multiple Reflection of Plane P and SV Waves By a Dipping Layer     

Hiroshi Ishii  Robert M. Ellis 《Geophysical Journal International》1970,20(1):11-30

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Comment on ‘Poisson Equations of Rotational Motion for a Rigid Triaxial Body with Application to a Tumbling Artificial Satellite’ by Liu and Fitzpatrick     

Hiroshi Kinoshita 《Celestial Mechanics and Dynamical Astronomy》1980,21(3):253-257

Liu and Fitzpatrick (1975) discussed the secular and long-periodic behavior of a dynamical system by using improper time-averaged equations. The correct time-averaged equations are given in this note.  相似文献   

Gas capture and rare gas retention by accreting planets in the solar nebula     

Hiroshi Mizuno  Kiyoshi Nakazawa  Chushiro Hayashi 《Planetary and Space Science》1982,30(8):765-771

In this paper, the physico-chemical effects of the nebula gas on the planets are reviewed from a standpoint of planetary formation in the solar nebula.The proto-Earth growing in the nebula was surrounded by a primordial atmosphere with a solar chemical composition and solar isotopic composition. When the mass of the proto-Earth was greater than 0.3 times the present Earth mass, the surface was molten because of the blanketing effect of the atmosphere. Therefore, the primordial rare gasses contained in the primordial atmosphere dissolved into the molten Earth material without fractionation and in particular the dissolved neon is expected to be conserved in the present Earth material. Hence, if dissolved neon with a solar isotopic ratio is discovered in the Earth material, it will indicate that the Earth was formed in the nebula and that the dissolved rare gases were one of the sources which degassed to form the present atmosphere.  相似文献