Methane in Water and Bottom Sediments in Three Sections in the Kara and Laptev Seas     

A. A. Vetrov  N. V. Lobus  A. N. Drozdova  N. A. Belyaev  E. A. Romankevich 《Oceanology》2018,58(2):198-204

The methane content in water and bottom sediments was measured in vertical sections: Lena River Delta–continental slope (the Laptev Sea), Taimyr Peninsula–Voronin Trough, and along the Novaya Zemlya Archipelago. The methane concentrations varied from 2.5 to 70 nmol/L and from 590 to 2600 nmol/L in the water column and sediments, respectively. Most of the surface water samples showed oversaturation in methane (up to 19-fold, fourfold on average), which determined the water–atmosphere direction of methane fluxes, which amounted to 1–400 mol/km² day (52 mol/km² day on average).  相似文献   

Laboratory investigations of the thermal strain of frozen soils, using fiber-optic strain gauges based on Bragg gratings     

Aleksey Marchenko  Nicolai Vasiliev  Artem Nesterov  Yuri Kondrashov  Nikolay Belyaev 《寒旱区科学》2017,9(3):192-196

Measurements of the thermal deformations of frozen soil samples were performed in the cold laboratory in temperature range from 0°C to-12°C.Fiber Bragg Gratings strain and temperature sensors were used to measure the deformation and temperature inside the samples.A number of tests with the samples prepared from Kaolin and Cambrian clay saturated with fresh water,and prepared from fine and silt sand saturated with fresh or saline water,are performed.Thermal deformations of the samples are analyzed depending on the cyclic changes of their temperature.  相似文献   

An investigation of the SO₂ content of the venusian mesosphere using SPICAV-UV in nadir mode     

Emmanuel Marcq  Denis Belyaev  Anna Fedorova  Ann Carine Vandaele 《Icarus》2011,211(1):58-69

Using the SPICAV-UV spectrometer aboard Venus Express in nadir mode, we were able to derive spectral radiance factors in the middle atmosphere of Venus in the 170-320 nm range at a spectral resolution of R ? 200 during 2006 and 2007 in the northern hemisphere. By comparison with a radiative transfer model of the upper atmosphere of Venus, we could derive column abundance above the visible cloud top for SO₂ using its spectral absorption bands near 280 and 220 nm. SO₂ column densities show large temporal and spatial variations on a horizontal scale of a few hundred kilometers. Typical SO₂ column densities at low latitudes (up to 50°N) were found between 5 and 50 μm-atm, whereas in the northern polar region SO₂ content was usually below 5 μm-atm. The observed latitudinal variations follow closely the cloud top altitude derived by SPICAV-IR and are thought to be of dynamical origin. Also, a sudden increase of SO₂ column density in the whole northern hemisphere has been observed in early 2007, possibly related to a convective episode advecting some deep SO₂ into the upper atmosphere.  相似文献   

The first section of vendian deposits in the basement complex of the West Siberian petroleum megabasin (resulting from the drilling of the Vostok-3 parametric borehole in the Eastern Tomsk region)     

A. E. Kontorovich  B. S. Sokolov  V. A. Kontorovich  A. I. Varlamov  D. V. Grazhdankin  A. S. Efimov  A. G. Klets  S. V. Saraev  A. A. Terleev  S. Yu. Belyaev  I. V. Varaksina  G. A. Karlova  B. B. Kochnev  K. E. Nagavitsin  A. A. Postnikov  Yu. F. Filippov 《Doklady Earth Sciences》2009,425(1):219-222

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Analysis of Optimal Flight Trajectories to the Trans-Neptunian Object (90377) Sedna     

Zubko  V. A.  Sukhanov  A. A.  Fedyaev  K. S.  Koryanov  V. V.  Belyaev  A. A. 《Astronomy Letters》2021,47(3):188-195

Astronomy Letters - We present the results of our analysis of the optimal flight to the trans-Neptunian object (90377) Sedna at the launch in 2029. Sedna is a distant space object with a perihelion...  相似文献   

A section of Vendian in the east of West Siberian Plate (based on data from the Borehole Vostok 3)     

A.E. Kontorovich  A.I. Varlamov  D.V. Grazhdankin  G.A. Karlova  A.G. Klets  V.A. Kontorovich  S.V. Saraev  A.A. Terleev  S.Yu. Belyaev  I.V. Varaksina  A.S. Efimov  B.B. Kochnev  K.E. Nagovitsin  A.A. Postnikov  Yu.F. Filippov 《Russian Geology and Geophysics》2008,49(12):932-939

The Borehole Vostok 3 drilled in the east of the West Siberian Plate (Tomsk Region) revealed a Vendian section in the depth range 5002–3870 m, which was subdivided into the Poiga, Kotodzha, and Raiga Formations based on geological, geophysical, and paleontological data. In the Kotodzha and Raiga Formations, typical Upper Vendian fossils of Cloudina hartmanae and Namacalathus sp. were found along with diverse Platysolenites, which are commonly considered to be of zonal significance in Lower Cambrian strata. Hence, the stratigraphic interval with abundant diverse Platysolenites has a wider stratigraphic range than it was believed earlier and seems to cover the Upper Vendian and Lower Cambrian deposits. The Borehole Vostok 3 is the first Siberian occurrence of the fossils Namacalathus, the world's fourth occurrence of the Cloudina-Namacalathus association, and the first site where coexisting Platysolenites and typical Vendian organisms have been found. Therefore, the borehole provides one of the most informative (in paleontological context) Upper Vendian sections.  相似文献   

Solar infrared occultation observations by SPICAM experiment on Mars-Express: Simultaneous measurements of the vertical distributions of H₂O, CO₂ and aerosol     

A.A. Fedorova  O.I. Korablev  A.V. Rodin  F. Montmessin  D.A. Belyaev 《Icarus》2009,200(1):96-1871

The infrared AOTF spectrometer is a part of the SPICAM experiment onboard the Mars-Express ESA mission. The instrument has a capability of solar occultations and operates in the spectral range of 1-1.7 μm with a spectral resolution of ∼3.5 cm⁻¹. We report results from 24 orbits obtained during MY28 at Ls 130°-160°, and the latitude range of 40°-55° N. For these orbits the atmospheric density from 1.43 μm CO₂ band, water vapor mixing ratio based on 1.38 μm absorption, and aerosol opacities were retrieved simultaneously. The vertical resolution of measurements is better than 3.5 km. Aerosol vertical extinction profiles were obtained at 10 wavelengths in the altitude range from 10 to 60 km. The interpretation using Mie scattering theory with adopted refraction indices of dust and H₂O ice allows to retrieve particle size (reff∼0.5-1 μm) and number density (∼1 cm⁻³ at 15-30 km) profiles. The haze top is generally below 40 km, except the longitude range of 320°-50° E, where high-altitude clouds at 50-60 km were detected. Optical properties of these clouds are compatible with ice particles (effective radius reff=0.1-0.3 μm, number density N∼10 cm−3) distributed with variance νeff=0.1-0.2 μm. The vertical optical depth of the clouds is below 0.001 at 1 μm. The atmospheric density profiles are retrieved from CO₂ band in the altitude range of 10-90 km, and H₂O mixing ratio is determined at 15-50 km. Unless a supersaturation of the water vapor occurs in the martian atmosphere, the H₂O mixing ratio indicates ∼5 K warmer atmosphere at 25-45 km than predicted by models.  相似文献   

Response of a coupled ocean-ice-atmosphere model to data assimilation in the tropical zone of the Pacific Ocean     

K. P. Belyaev  N. P. Tuchkova  U. Cubash 《Oceanology》2010,50(3):306-316

This paper deals with numerical experiments based on the coupled ECHAM-HOPE model. The results of experiments are analyzed. The initial fields for the calculations over time periods from one month to one year are constructed based on the results of the data assimilation of temperature profiles from TOGA-TAO moorings. The perturbations of the initial fields and the propagation of these perturbations with specific computational time intervals are analyzed on the basis of the results of these experiments. It is shown that the strongest impacts of the perturbations are localized in specific regions of the World Ocean corresponding to the energetically active zones of the Earth. The mechanism of the transition of these perturbations is also studied. Different statistical properties of the ensemble of experiments are presented.  相似文献   

Hysteresis effect in nutrient sorption by boggy sediments     

A. Yu. Belyaev  R. G. Dzhamalov  G. N. Krichevets  V. L. Polyakova  I. O. Yushmanov 《Water Resources》2005,32(2):183-191

The role of bogs as filters on the path of pollutant migration to surface and subsoil waters is demonstrated. Sorption hysteresis is shown to play a major role in the retention of pollutants by peat mass. The mathematical problem of pollutant transport and absorption in bogs is formulated and solved numerically.Translated from Vodnye Resursy, Vol. 32, No. 2, 2005, pp. 205–213.Original Russian Text Copyright © 2005 by Belyaev, Dzhamalov, Krichevets, Polyakova, Yushmanov.  相似文献   

Artur Khasenbekovich Kagarmanov (1934–2005)     

B. S. Sokolov  A. I. Zhamoida  M. A. Ivanov  L. I. Krasnyi  A. S. Alekseev  A. A. Belyaev  N. V. Goreva  T. N. Koren’  O. L. Kossovaya  G. V. Kotlyar  E. D. Mikhailova  Yu. P. Nenashev  I. A. Odesskii  E. L. Prozorovskaya  A. Yu. Rozanov 《Stratigraphy and Geological Correlation》2006,14(6):696-697

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