Water, Salt, Phosphorus and Nitrogen Budgets of the Japan Sea   总被引：1，自引：0，他引：1  

Tetsuo Yanagi 《Journal of Oceanography》2002,58(6):797-804

Water, salt, phosphorus and nitrogen budgets of the Japan Sea have been calculated by box model analysis using historical data. Average residence time of the Tsushima Warm Current Water in the upper 200 m is 2.1 years and that of the Japan Sea Proper Water is 90 years. The salt flux from the Tsushima Strait balances those through the Tsugaru and Soya Straits. Average residence times of phosphorus and nitrogen from the Tsushima Strait are 2.2 years and 1.6 years, respectively, in the upper 200 m of the Japan Sea. Total nitrogen/total phosphorus ratios of riverine load, the Tsushima Warm Current water and the water in the Japan Sea are 16.4, 16.6 and 11.3, respectively. This suggests that denitrification is dominant in the Japan Sea. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Eddy Activities around the Nansei Shoto (Okinawa Islands) Revealed by TRMM     

Tetsuo Yanagi  Tsutomu Tokeshi  Shin-ichiro Kakuma 《Journal of Oceanography》2002,58(4):617-624

Sea surface temperature (SST) variation around the Nansei Shoto (Okinawa Islands), Japan from March 1998 to February 1999 is investigated using the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) images. Root mean squared (RMS) error of SST by TMI from the in situ observed SST is 0.9°C. The results of statistical analysis of SST by TMI show that a 14–16 days period variation dominates around the main Okinawa Island, while a 9–11 days period variation dominates along the shelf edge of the East China Sea. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Bunnoite,a new hydrous manganese aluminosilicate from Kamo Mountain,Kochi prefecture,Japan     

Daisuke Nishio-Hamane  Koichi Momma  Ritsuro Miyawaki  Tetsuo Minakawa 《Mineralogy and Petrology》2016,110(6):917-926

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Projections of glacier change in the Altai Mountains under twenty-first century climate scenarios     

Yong Zhang  Hiroyuki Enomoto  Tetsuo Ohata  Hideyuki Kitabata  Tsutomu Kadota  Yukiko Hirabayashi 《Climate Dynamics》2016,47(9-10):2935-2953

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Fundamental study on the tidal residual circulation—I     

Tetsuo Yanagi 《Journal of Oceanography》1976,32(5):199-208

The tidal residual circulation in a bay was experimentally investigated with use of a hydraulic model. The model basin is a square bay of 5 m sides with a one-sided mouth of 1 m wide. The depth of the basin is 0.1 m. The tide of a six-minute period was provided by a tide generator of plunger type through the mouth. Tidal currents in the bay always flow in one direction though its strengths change according to the tidal phase, that is, a strong tidal residual circulation occurs in the bay. A similar flow pattern was observed to occur in a field with a horizontal boundary geometrically similar to the present model. The vorticity transfer from tidal current to residual flow is balanced with the vorticity advection of residual flow and the dissipation due to the viscosity.  相似文献   

VI-2 The present situation and the progress of development of the air turbine type wave activated generator for a navigation aid buoys     

Masaru Yahagi  Katsumasa Kajiwara  Tetsuo Yamazaki 《Ocean Engineering》1985,12(6):588

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Tidal residual flow in Kasado Bay     

Tetsuo Yanagi 《Journal of Oceanography》1977,33(6):335-339

A current measurement was carried out in Kasado Bay to understand the vertical structure of tidal residual flow and its dependence upon the tidal range. The tidal residual flows have almost the same flow direction in the upper and the lower layer and its magnitude in the upper layer is larger than that in the lower layer. The tidal residual flow at spring tides is stronger than that at neap tides.  相似文献   

Spectrophotometric scan of comet 1973 XII Kohoutek     

Hisashi S. Ishii  Tetsuo Yamamoto  Shin'ichi Tamura 《Earth, Moon, and Planets》1981,25(4):437-450

Photoelectric spectrophotometric scans of Comet 1973 XII Kohoutek were made on November 25.85 and 28.85 UT, 1973. The vibrational temperature of C₂, the total numbers of CN and of C₂, and the production rates for CN and C₂ are derived from the observed fluxes. The temperature of C₂ was 4900 K on 25.85 November and 4300 K on 28.85 November. Mean abundance ratio of C₂ to CN was about 2.7. From the variation of production rates with heliocentric distance, it is shown that there was an outburst on 25.85 November in both CN and C₂ productions. For C₂, the production rates are derived by using two coma models, i.e. the Haser's parent-daughter model and the model relevant to a proposition of Yamamoto (1981b) that C₂ is formed via two-step photodissociation of its parent molecules. By comparing the production rate derived from the two models, it can be supported that C₂ is formed via two-step photodissociation rather than one-step photodissociation. In consequence, it is shown that the variation of the production rate with heliocentric distance is largely modified compared with that derived from the Haser's model.  相似文献   

An excitation mechanism for the free 'core nutation'   总被引：2，自引：0，他引：2  

Tetsuo Sasao  John M. Wahr 《Geophysical Journal International》1981,64(3):729-746

Summary. The Earth is believed to possess a free nutational mode due to its rotating, elliptical, fluid core, with an eigenfrequency of approximately (1 + 1/460) cycle sidereal day⁻¹ as seen from the sidereally rotating Earth. This free 'core nutation' has not yet been undisputably observed. Furthermore, there has been considerable doubt that any known mechanism could excite this mode to an observable level. We show here that diurnal atmospheric and oceanic loading of the Earth's surface provide an efficient excitation mechanism which depends critically on the physical damping of the mode. Possible effects of the mode on geodetic measurements are discussed. We also consider the effects of 'wobble' and 'nutation' on astrometric observations.  相似文献   

Cep A: A possible proto-cluster     

Saeko S. Hayashi  Norio Kaifu  Tetsuo Hasegawa 《Astrophysics and Space Science》1986,119(1):155-157

We present high resolution CS and CO maps of Cep A region made with the 45m telescope at Nobeyama. The CS map shows that a dense cloud surrounding the proto-star cluster extends in the North-South direction and is probably rotating. The bipolar molecular flow apparent in the CO maps is well-collimated along East-West direction within 0.2 pc from the proto-stars. The dense cloud is gravitationally unstable and appears to be in a contracting phase to form a cluster of massive stars.Paper presented at the IAU Third Asian-Pacific Regional Meeting, held in Kyoto, Japan, between 30 September–6 October, 1984.NRO, a branch of the Tokyo Astronomical Observatory, University of Tokyo, is a cosmic radio observing facility open for outside users.  相似文献