Solar radiation redistribution peculiarities in ice hummocks of the Arctic basin     

O. M. Andreev  B. V. Ivanov  A. M. Bezgreshnov 《Russian Meteorology and Hydrology》2011,36(1):40-44

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Platinum‐Group Element Results for Two Cobalt‐Rich Seamount Crust Ultra‐Fine Reference Materials: MCPt‐1and MCPt‐2     

Yimin Wang  Xiaohong Wang  Wenjun Qu  Yushu Gao  Tiexin Gu  Xingtao Fan  S.I. Andreev  Xuefa Shi 《Geostandards and Geoanalytical Research》2011,35(3):341-352

Two Co‐rich seamount crust reference materials, MCPt‐1 and MCPt‐2, were prepared using ultra‐fine particle size milling technique and characterised for the platinum‐group elements (PGEs). The raw material for these two reference materials was collected separately from the Magellan seamounts of the western Pacific Ocean and the seamounts of the central Pacific Ocean by Russian and Chinese scientists. First, they were ground by ball mill to a ?200 mesh powder, then further processed by ultra‐fine jet mill and well‐mixed. The particle size distributions of the samples were tested by a laser particle analyser; the average particle size was 1.8 and 1.5 μm (equal to about 2000 mesh) respectively. The homogeneity of six major and minor elements in these two materials was tested at the milligram level of sampling mass by high‐precision wavelength dispersive X‐ray fluorescence (XRF) spectrometry and at the microgram level of sampling mass by electron probe microanalyser. The homogeneity of more than forty trace elements, including Pt, was tested at the microgram level of sampling mass by LA‐ICP‐MS. Except for Rh, all PGEs were determined by isotope dilution‐ICP‐MS. Platinum in MCPt‐1 and MCPt‐2 was characterised as certified values, whereas the other five PGEs in MCPt‐1 and MCPt‐2 were reported as reference values. In addition, the information values of sixty‐two major, minor and trace elements were obtained by XRF, ICP‐AES and ICP‐MS. The minimum sampling mass for the determination of PGEs was 1 g, while the minimum sampling mass for the determination of the other elements was 2–5 mg.  相似文献   

Use of an Analytical Theory for the Physical Libration of the Moon to Detect Free Nutation of the Lunar Core     

Petrova  N. K.  Nefedyev  Yu. A.  Zagidullin  A. A.  Andreev  A. O. 《Astronomy Reports》2018,62(12):1021-1025

A brief review of modern observational achievements and the theoretical basis of physical libration of the Moon is presented. Special attention is given to the inferred existence of a lunar core and determination of its parameters. The creation of a theory of physical libration of the Moon, which requires analyses of semi-empirical series of long-term laser observations and the use of the highly accurate DE421 dynamical ephemeris, is related to this. A large role in this area has been played by the analytical theory of physical libration of the Moon constructed by Yu.V. Barkin, which made it possible for the first time to derive parameters of the free nutation of the lunar core from observations. This paper is based on a talk given at the conference “Modern Astrometry 2017,” dedicated to the memory of K.V. Kuimov (Sternberg Astronomical Institute, Moscow State University, October 23–25, 2017).

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Fast spectrophotometry of the flare star EV lacertae     

B. E. Zhilyaev  M. V. Andreev  A. V. Sergeev  V. N. Reshetnik  N. A. Parakhin 《Astronomy Letters》2012,38(12):793-800

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Photometry of the dwarf nova V503 Cyg in 2010. Orbital and other periods     

E. P. Pavlenko  D. A. Samsonov  O. I. Antonyuk  M. V. Andreev  A. V. Baklanov  A. A. Sosnovskij 《Astrophysics》2012,55(4):494-504

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Earthquake parameters and spatial distribution of coseismic effects in Southern Siberia and Mongolia     

A. V. Andreev  O. V. Lunina 《Seismic Instruments》2013,49(2):139-177

In this work we review earthquakes that happened in Southern Siberia and Mongolia within the coordinates of 42°–62° N and 80°–124° E and first propose relationships between earthquake parameters (a surface-wave earthquake magnitude M _s and an epicentral intensity(I ₀) based on the MSK-64 scale) and maximal distances from an earthquake epicenter (R _{e max}), hypocenter (R _{h max}), and a seismogenic fault (R _{f max}) to the localities of secondary coseismic effects. Special attention was paid to the study of these relationships for the effects of soil liquefaction. Hence, it was shown that secondary deformations from an earthquake were distributed in space away from an earthquake epicenter, than from an associating seismogenic fault. The effects of soil liquefaction are manifested by several times closer to a seismogenic fault, than all other effects, regardless of the type of tectonic movement in a seismic focus. Within the 40 km zone from an earthquake epicenter 44% of the known manifestations of liquefaction process occurred; within the 40 km zone from a seismogenic fault—90%. We propose the next relationship for effects of soil liquefaction: M _s = 0.007 × R _{e max} + 5.168 that increases the limits of the maximum epicentral distance at an earthquake magnitude of 5.2 ≤ M _s ≤ 8.1 as compared to the corresponding relationships for different regions of the world.  相似文献   

The Use of Artificial Neuron Networks for Retrieval Temperature and Humidity Sounding of the Atmosphere According to the Data of the MTVZA-GY Microwave Radiometer Installed on the Meteor-M No. 2-2 Satellite     

Filei  A. A.  Andreev  A. I.  Uspensky  A. B. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(12):1515-1526

Izvestiya, Atmospheric and Oceanic Physics - We consider the application of artificial neural networks for remote temperature and humidity profiles sounding of the atmosphere according to the data...  相似文献   

The use of one-dimensional thermodynamic model for computing the level ice thickness and hummock freezing intensity in the Northern Caspian Sea     

O. M. Andreev  B. V. Ivanov 《Russian Meteorology and Hydrology》2012,37(1):34-38

The results are analyzed of numerical experiments obtained using a one-dimensional thermodynamic model of the sea ice developed by the authors. The computations of the level-ice (fast-ice) evolution and ice hummock consolidation layer formation in different climatic situations (anomalously cold and anomalously warm winters) are carried out within the frameworks of the proposed model for the conditions being typical of the Northern Caspian Sea. The results of model computations are compared with the data of field researches carried out by the specialists of the Arctic and Antarctic Research Institute in 2003–2008. A good correspondence is demonstrated between the model computations and expeditionary data. A conclusion is made on the prospectivity of using the model for design engineering.  相似文献   

The Early Cambrian Age and Crustal Sources of Granitoids of the Goryachinskiy Pluton (Northern Baikal): Geodynamic Implications     

Rytsk  E. Yu.  Salnikova  E. B.  Yarmolyuk  V. V.  Andreev  A. A.  Bogomolov  E. S.  Lebedeva  Yu. M.  Velikoslavinsky  S. D.  Anisimova  I. V.  Plotkina  Yu. V.  Fedoseenko  A. M. 《Doklady Earth Sciences》2019,484(2):163-166

Doklady Earth Sciences - New results of U–Pb zircon and Nd–isotope analyses of the Goryachinskiy Pluton adakite granites have been obtained. The pluton is exposed along the Baikal coast...  相似文献   

Mesoscale dynamics and walleye pollock catches in the Navarin Canyon area of the Bering Sea     

Andrey G. Andreev  Maxim V. Budyansky  Michael Yu. Uleysky  Sergey V. Prants 《Ocean Dynamics》2018,68(11):1503-1514

Large canyons incise the shelf break of the eastern Bering Sea to be preferred sites of the cross-shelf exchange. The mesoscale eddy activity is particularly strong near the shelf-break canyons. To study the mesoscale dynamics in the Navarin Canyon area of the Bering Sea, the time series of velocities derived from AVISO satellite altimetry between 1993 and 2015, drifters, Argo buoys, and ship-borne data are analyzed. We demonstrate that the strength of anticyclonic eddies along the shelf edge in spring and summer is determined by the wind stress in March–April. The increased southward wind stress in the central Bering Sea forced a supply of low-temperature and low-salinity outer shelf water to the deep basin and formation of the anticyclonic mesoscale circulation seaward of the Navarin Canyon. Enhanced northwestward advection of the Bering Slope Current water leads to increase in an ice-free area in March and April and increased bottom-layer temperature at the outer shelf. The strong (weak) northwestward advection of the eastern Bering Sea waters, determined by eastern winds in spring, creates favorable (unfavorable) conditions for the pollock abundance in the western Navarin Canyon area in summer.  相似文献