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31.
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33.
N. A. Dianskii A. V. Gusev V. V. Fomin 《Izvestiya Atmospheric and Oceanic Physics》2012,48(2):222-240
We present two calculations of pollutant dispersal in the Pacific Ocean: (1) during possible ship-wrecks in the process of
spent nuclear fuel transportation from Petropavlovsk-Kamchatsky and (2) pollutant spread from the Japanese coast after the
Fukushima-1 nuclear disaster on March 11, 2011. The circulation was calculated using a σ model of ocean hydrothermodynamics
developed at the Institute of Numerical Mathematics (INM), Russian Academy of Sciences (RAS); it is adapted to cover the Pacific
Ocean basin from the equator to the Bering Strait with a high (1/8)° spatial resolution and it is capable of reproducing the
mesoscale ocean variations. The pollutant dispersal in the case of possible shipwrecks was estimated for currents characteristic
for a statistically average year with atmospheric forcing in accordance with the so-called normal CORE year data. The pollution
spread from the Fukushima-1 nuclear power plant (NPP) was estimated by calculating the circulation with the real atmospheric
forcing in accordance with the NCEP analysis data obtained from the Hydrometeorological Centre of Russia. It is noteworthy
that a simplified assimilation of the observed sea surface temperature (SST) was performed. In both cases the currents were
calculated simultaneously with the transport calculation of the pollutant as a passive admixture, which corresponds to a real-time
calculation of pollutant transport. A map analysis of pollution dispersal shows that the horizontal transport is substantially
more intense in the upper ocean layers than in deep ones. Therefore, like in the North branch of Kuroshio, pollutants can
be delivered to the deep layers not through deep-water horizontal transport, but rather as a result of vertical downwelling
from the already contaminated upper layers. However, the complex three-dimensional structure of the horizontal and vertical
transport may lead to reverse situations. A calculation of pollution transport from the Fukushima-1 NPP showed that radioactive
pollution would propagate eastward and not present the danger for Russian territory. Moreover, even for an exaggerated scenario
of pollution emission, the background pollution level will be exceeded only in a narrow region within 50 km of the Japanese
coast. 相似文献
34.
D. I. Frey V. V. Fomin N. A. Diansky E. G. Morozov V. G. Neiman 《Doklady Earth Sciences》2017,474(1):561-564
We used a numerical model of the ocean circulation with a high spatial resolution to obtain estimates of the kinematic characteristics of Antarctic Bottom Water flow through the abyssal Vema Channel in the southwestern part of the Atlantic Ocean. The results of simulations correspond to the data of direct velocity measurements made at several locations in the channel. The high horizontal and vertical resolution of the model in the bottom layer allowed us to study in detail the hydrodynamics of this flow over its entire length. 相似文献
35.
A.E. Kontorovich E.A. Kostyreva S.V. Saraev V.N. Melenevskii A.N. Fomin 《Russian Geology and Geophysics》2011,52(9):955-962
We have studied for the first time the organic geochemistry of the Vendian thick section stripped by the parametric well Vostok-3 in the depth range 5002–3870 m in southeastern West Siberia. The results point to the aquagene–plankton–derived and bacterial nature of the buried organic matter (OM). At some depth levels, the deposits are enriched in OM (up to 0.7–9.6%). The study of kerogens has shown that the OM is transformed to the apocatagenesis stage. The composition of biomarker hydrocarbons in bitumens has been studied, and the geochemical criteria for the petroleum presence prediction are considered. 相似文献
36.
A. A. Stepanian B. M. Vladimirsky Yu. I. Neshpor V. P. Fomin 《Astrophysics and Space Science》1975,38(2):267-282
The results of the observations to search gamma-ray sources with the energy greater than 2×1012 eV, which were made in Crimean Astrophysical Observatory during the years 1969–73 are presented. A technique of the detection of the EAS Cerenkov flashes was used.The quality of the data obtained is analysed. The criteria for the selection of the data free from meteorological variations are considered.It was shown that two objects, namely, Cyg X-3 and Cas -1, may be the sources of high-energy gamma quanta. It is probable that the object with the coordinates =05h15m, =+1° is the source of gamma-rays as well. An unidentified object Cas -1 is variable: gamma-ray flux was observed twice — in Sepember–October 1971 and in December 1972. It is possible that the flux from Cyg X-3 has a period of 4.8 hr.
I I , I I , - >2.1012 . I . I , I I, I ., - -1 Cyg -3- -I . , =0515 ·=+1° -.I -1 I: I J I- - 1971 1972 . Cyg -3, , - T=4.8 .相似文献
37.
Yu. I. Neshpor A. A. Stepanian V. P. Fomin S. A. Gerasimov B. M. Vladimirsky Yu. L. Ziskin 《Astrophysics and Space Science》1979,61(2):349-355
The period of very high energy (E>2×1012 eV) gamma-ray emission of Cyg X-3 by using the data of observations of the source made during 6 years, 1972–1977, was specified. The value of the period is equal to 0.199 683±1×10–6 days. Phase histogram reveals two peaks, one lagging the other by 0.6 of the period. The averaged 6 year data amounts to 1.8×10–10 quanta cm–2 s–1 (peak intensity). It corresponds to luminosity of about 1.2×1037 erg s–1 if one assumes that an emission is isotropical and the distance is equal to 10 kpc.
- E>2×1012 Cyg X-3 . 1972–1977 . - T=0,199 683 ±10–6 . , 0,6 . 1,8×10–10 –2 –1 ( ), 1,2×1037 / 10 .相似文献
38.
D. V. Alekseev V. A. Ivanov E. V. Ivancha V. V. Fomin L. V. Cherkesov 《Physical Oceanography》2005,15(6):336-345
By the method of mathematical simulation, we study the evolution of local discharges of pollutants on the northwest shelf
of the Black Sea induced by the motion of a cyclone. We use the nonlinear equations of motion of a homogeneous viscous fluid
in the hydrostatic approximation and the equation of turbulent diffusion. A cyclonic formation is represented by a moving
axisymmetric area of low pressures. The discharges of pollutants are caused by the action of instantaneous sources located
on the sea surface. We perform the analysis of dependences of the paths of motion of polluted regions, the periods of their
dissipation, and the depths of penetration of pollutants on the bottom topography and the intensity of diffusion processes.
__________
Translated from Morskoi Gidrofizicheskii Zhurnal, No. 6, pp. 17–27, November–December, 2005. 相似文献
39.
A mathematical model is suggested for calculating current, density, and pressure fields in the area of a solitary bottom rise
(seamount). The model is based on a set of non-linear differential equations governing the motion of an inviscid continuously
stratified fluid. The algorithm for solving the equations is based on the splitting technique. The model has been used to
compute non-linear baroclinic waves generated by a barotropic tide in the seamount area.
Translated by Vladimir A. Puchkin. 相似文献
40.
D. V. Alekseev V. A. Ivanov E. V. Ivancha V. V. Fomin L. V. Cherkesov 《Physical Oceanography》2007,17(1):1-16
The processes of roiling of the bottom sediments, diffusion transport of the suspension, and its repeated sedimentation on
the northwest shelf of the Black Sea caused by a moving cyclone are studied by using a numerical sigma-coordinate model. It
is supposed that bottom sediments are formed by particles of the same type. We determine the regions of the most intense rise
of the suspension, directions of its transport by the flows of water, and the vertical profiles of concentration of suspended
bottom sediments in different regions. In particular, it is shown that the distribution of suspended substances at a distance
of 1 m from the bottom reflects the location of the active and inactive centers of erosion.
__________
Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 3–20, January–February, 2007. 相似文献