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21.
N. N. Filatov T. Yu. Viruchalkina N. A. Dianskiy L. E. Nazarova V. N. Sinukovich 《Doklady Earth Sciences》2016,467(2):393-397
The features of the intrasecular changes in the level of the largest lakes of Russia (Baikal, Ladoga, Onego, and the inland Caspian Sea) are jointly considered for the first time on the basis of the long-term data measured in the 20th–21st centuries. The influence of climate and anthropogenic factors is considered to improve the forecast of the level of lakes. 相似文献
22.
Conodonts from the deposits of the Mosolovian Regional Stage (Middle Devonian) of the Voronezh Anteclise are studied on the basis of the data from six boreholes. Three assemblages are recognized. The index species of the lowermost assemblage is Icriodus formosus Naz. The index species of the middle assemblage are I. formosus Naz. and Pseudobipennatus ziegleri Kon. et Kim, as well as I. arkonensis Stauff. and I. jejunus Naz. This assemblage is the most diverse and is recognized in all boreholes. The deposits containing this assemblage correspond to the maximum of the Nara transgression. The upper assemblage is also recognized in all the studied boreholes. Its index species is Ps. ziegleri Kon. et Kim. The Mosolovian Regional Stage is assigned to the kockelianus Zone. The distribution diagrams of species in the most diverse middle assemblage support the hypothesis that, in the southeastern regions of the Voronezh anteclise, the depth was greater than in its western part. The characteristic conodont species are shown in the plates. 相似文献
23.
L. S. Nazarova N. G. Bochkarev A. I. Shapovalova 《Astrophysics and Space Science》1993,205(1):171-177
Optical spectra of the NGC 4151 with the TV scanner of the 6-meter telescope in 1986–1991 are presented. Spectra averaged over periods of 2.5 months show changes of asymmetry of the He II 4686 Å broad emission line with a characteristic time scale 2 years (the full cycle of the changes is approximately 4 years). Possible explanations involving a precession-type of movement of cones of ionizing radiation are discussed. 相似文献
24.
L. B. Nazarova D. A. Subetto L. S. Syrykh I. M. Grekov P. A. Leontev 《Doklady Earth Sciences》2018,480(2):710-714
The use of chironomids (Diptera: Chironomidae) as indicators of changes in natural and climatic settings allows one to reconstruct paleoclimatic and paleoenvironmental conditions. Based on the results of lithological and chironomid analyses, the loss on ignition (LOI) values, as well as the results of radiocarbon dating (14C AMS), new data on the paleoclimate in the Karelian Isthmus, in particular the quantitative reconstruction of the mean July temperature (TJuly, °C) in the Late Pleistocene and Holocene and the evolution of the ecosystem of Medvedevskoe Lake have been obtained. 相似文献
25.
A. A. Krivolutsky A. A. Kuminov A. A. Kukoleva A. I. Repnev N. K. Pereyaslova M. N. Nazarova 《Geomagnetism and Aeronomy》2008,48(4):432-445
Using the data on solar proton fluxes measured on board the GOES satellites, the most powerful solar proton events (SPEs) of solar cycle 23 are selected, and ionization rates in the atmosphere in these periods at high latitudes of the Northern Hemisphere are calculated. Assuming that each ion pair formed at the retardation of solar protons in the atmosphere leads to the formation of 1.25 molecules of nitric oxide, 2.0 molecules of the OH radical, and one oxygen atom, changes in the content of ozone, nitrogen and other compounds were calculated using a photochemical model. The calculations showed that the strongest ionization and destruction of ozone was caused by SPEs that occurred on July 14, 2000; November 8, 2000; November 4, 2001; and October 28, 2003. The results can form the basis for compiling the catalog of changes in ionization and ozone in the atmosphere caused by solar proton activity. 相似文献
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27.
Processes of thermal metamorphism of carboniferous rocks have been studied experimentally. The conditions of high-temperature
interaction of shungite carbon with components of the contained rocks, leading to formation of carbide compounds, have been
determined. The results of this investigation contribute to the works on searching for new raw material for prospective material
production. 相似文献
28.
Organochlorine pesticide and trace metal monitoring of Russian rivers flowing to the Arctic Ocean: 1990-1996 总被引：1，自引：0，他引：1
Alexeeva LB Strachan WM Shlychkova VV Nazarova AA Nikanorov AM Korotova LG Koreneva VI 《Marine pollution bulletin》2001,43(1-6):71-85
Information is presented on the concentrations of organochlorine pesticides (HCHs and DDT residues) and trace metals (Fe, Cu, Zn and Ni) in waters of 15 large Russian rivers flowing to the Arctic Ocean during 1990-1996. Estimates of the corresponding annual fluxes are made. Other contaminants (Hg, Pb, Cr, Mn, beta-HCH and dihydroheptachlor) were examined briefly. Concentration data are presented as averaged annual means for each of the seven years with the ranges, standard deviations and numbers of samples. Also given are data on locations, the methods of analysis and limited quality assurance data. Data on discharges to the Northern Seas for the more frequently monitored contaminants are given for rivers accounting for >70% of the total northerly flows. Scaled-up fluxes to account for unmonitored rivers as well are given for each sea; totals over the period were: Fe, 1452; Cu, 15; Zn, 59 (x 10(3) t yr(-1)); alpha-HCH, 25; gamma-HCH, 44 (t yr(-1)). Ni was monitored at too few rivers to estimate its total Russian flux. The fluxes for the HCHs considerably exceed previous estimates and indicate that the Arctic Ocean is not in balance as much as was previously believed. 相似文献
29.
Nazarova D. P. Portnyagin M. V. Krasheninnikov S. P. Mironov N. L. Sobolev A. V. 《Doklady Earth Sciences》2017,472(1):100-103
Doklady Earth Sciences - The formation conditions of the parental magmas of Gorely volcano, which is located behind a volcanic front in Southern Kamchatka, have been evaluated using the modern... 相似文献