Ozone content over the Russian Federation in the third quarter of 2013     

A. M. Zvyagintsev  N. S. Ivanova  G. M. Kruchenitskii  I. N. Kuznetsova 《Russian Meteorology and Hydrology》2013,38(11):792-795

The review is compiled on the basis of the results of monitoring the total ozone (TO) in the CIS and Baltic countries that functions in the operational regime at the Central Aerological Observatory (CAO). The monitoring system uses the data from the national network with M-124 filter ozonometers under methodological supervision of the Main Geophysical Observatory. The quality of the functioning of the entire system is under operational control based on the observations obtained from the OMI satellite equipment (NASA, the United States). The basic TO observation data are generalized for each month of the first quarter of 2013 and for the quarter as a whole. The data on the development of the Antarctic spring ozone anomaly in August and September 2013 are presented as well as the results of regular observations of the surface ozone content carried out in Moscow region by GPBU Mosekomonitoring and CAO.  相似文献   

Baseline levels of chemical elements in the water of Lake Baikal     

V. A. Vetrov  A. I. Kuznetsova  O. A. Sklyarova 《Geography and Natural Resources》2013,34(3):228-238

Evidence for levels of five major elements (Na, Mg, Si, Ca, and K) and 53 trace elements (Li, Be, B,..., Pb, Th, and U) in the water mass of Lake Baikal is provided. The baseline levels of the elements were obtained from analyzing and summarizing the most reliable data published during the last 15 years, including these authors’ data. Most of the article focuses on an overview of the methodologies as used in the investigations involved (sampling techniques, and sample storage, processing and analysis methods). The summary table provides the most reliable concentration ranges for 58 elements which are recommended by these authors as background (baseline) levels.  相似文献   

Behavior of major and rare-earth elements during the postmagmatic alteration of kimberlites     

V.B. Vasilenko  L.G. Kuznetsova  V.A. Minin  A.V. Tolstov 《Russian Geology and Geophysics》2012,53(1):62-76

During serpentinization and subsequent alteration in the absence of brucite, kimberlites accumulate uncompensated silica. Its amount can be calculated from the average compositions of the rock-forming minerals (olivine, calcite, phlogopite) and the chemical compositions of the rocks. The contents of rock-forming oxides and REE were determined in 12 kimberlite pipes of the Yakutian kimberlite province, in 413 samples from secondary-alteration zones and of unaltered kimberlites. Columns of successive kimberlite alterations were constructed for each pipe on the basis of secondary-quartz data; here, the behavior of rock-forming oxides and REE was assessed. All the studied rocks had experienced different degrees of postmagmatic hydrothermal metasomatism at different depths in all the pipes. The changes were reflected in the supply/loss of rock-forming oxides and REE. The supply of REE during the hydrothermal metasomatism enriched the kimberlites with TiO₂, P₂O₅, and CaO. During the removal of REE, most of the rock-forming oxides were partially lost. The maximum REE supply was 67% in the Udachnaya-Vostochnaya pipe and 59% in the Nyurbinskaya pipe as compared with the unaltered kimberlites. The maximum REE loss was 87% in the Aikhal pipe and 81% in the Internatsional’naya pipe as compared with the unaltered kimberlites. The initial REE contents of the postmagmatically altered kimberlites changed considerably in all the studied cases. This conclusion was drawn owing to the use of normative-quartz content as a criterion for secondary alteration.  相似文献   

Monochromatic brightness factors of Jupiter and Saturn     

Yu. G. Kuznetsova 《Kinematics and Physics of Celestial Bodies》2008,24(6):331-333

The monochromatic brightness factors for morphologically nonuniform cloudy surface fields of Jupiter and Saturn in the visible wavelength range were calculated. In the spectra of both giant planets, the combination (Raman) light scattering feature (a pseudoemission peak) was detected in the range of a strong Fraunhofer line H Ca II; and its intensity was estimated.  相似文献   

Calculations of the ionization drift velocity by the Titheridge method,based on the data obtained at the Irkutsk Digisonde     

L. A. Shchepkin  G. M. Kuznetsova  G. P. Kushnarenko  K. G. Ratovsky 《Geomagnetism and Aeronomy》2009,49(8):1308-1310

The applicability of the method proposed by Titheridge [1995] to the estimations of the ionization vertical drift velocity V is studied. The values of the F2-layer maximum height, h _m F2, obtained from the measurements using the DPS-4 digital ionosonde at Irkutsk (Institute of Solar-Terrestrial Physics) in 2003–2006, are the initial data. The neutral gas parameters were calculated from the [Hedin, 1987] thermospheric model. The obtained calculations of the vertical ionization drift velocity are estimated by comparing with the [Hedin et al., 1991] empirical model. In some cases, good agreement with this model has been obtained. However, such agreement is registered not always, and the cause of such discrepancies is still unclear. The diurnal variations in the vertical ionization drift velocity in different seasons are also discussed.  相似文献   

Comparison between some methods for estimating thermospheric parameters using ionospheric incoherent scatter measurements     

Shchepkin  L. A.  Kushnarenko  G. P.  Kuznetsova  G. M. 《Geomagnetism and Aeronomy》2009,49(7):1002-1005

Three methods for estimating the atomic oxygen density and exospheric temperature using the ionospheric incoherent scatter measurements have been compared. These methods are based on the usage of the relationship obtained from the energy conservation equation. They are applicable under the conditions of the atmosphere composed of oxygen atoms and ions. The first method is based on the regression analysis of finding minimal deviations of the calculated electron densities (N) from the values measured at altitudes of 300–450 km. The second method is based on solving the set of equations of the analytical expression relating N to ionospheric characteristics. These equations are given for several altitudes. The third method is related to the selection of such atomic oxygen densities at which the neutral gas temperature remains constant at an altitude above 350 km. All methods give similar results. The calculations based on the measurements performed at the Irkutsk radar on September 23, 1998, showed that the atomic oxygen densities at 400 km, estimated using the first and second methods, account for 0.48 of the value predicted by the MSIS-86 model, and such densities estimated using the third method account for 0.59 of the model value. In this case the estimated exospheric temperatures are larger than the values obtained using the thermospheric model by 11% for the first and second methods and by 14% for the third method.  相似文献   

Reaction of the ionospheric <Emphasis Type="Italic">F</Emphasis>1 region to disturbances in October and November 2003 (analysis from Irkutsk digisonde measurements)     

G. P. Kushnarenko  G. M. Kuznetsova  O. E. Kolpakova 《Geomagnetism and Aeronomy》2010,50(8):1015-1020

We consider the ionospheric response at heights of 120–220 km to geomagnetic disturbances in October and November 2003, which caused a strongly pronounced decrease in the electron content in the noted height range. For this disturbance period, using a technique of the authors, midday variations of the relative content of atomic and molecular oxygen at a height of 120 km were estimated. This estimation was performed with the help of ionospheric measurements (by a digital ionosonde) conducted at the Institute of Solar-Terrestrial Physics of the Russian Academy of Sciences from 2003 to 2006. Comparison of these values with similar values from the mass spectrometer-incoherent scatter (MSIS)-86 model showed that our estimates during disturbance days were two times less. This study continues research into the field of using ionospheric measurements to estimate the relative gas composition of the thermosphere at heights below the maximum of the F2 layer.  相似文献   

Changes in surface water chemistry of the Chul’man River and its tributaries in coal mining regions     

A. P. Chevychelov  L. I. Kuznetsova 《Water Resources》2010,37(5):706-710

The physicochemical properties and chemistry of surface water of rivers in South-Yakutia Fuel and Production Complex were examined in the summer-autumn dry period. Changes in the properties and chemistry of the Chul’man River and its tributaries were analyzed to assess the effect of coal mining industry on the character and degree of technogenic pollution of surface water in the examined northern region.  相似文献   

On-ground calibration of the ART-XC/SRG mirror system and detector unit at IKI. Part I     

M. Pavlinsky  A. Tkachenko  V. Levin  A. Krivchenko  A. Rotin  M. Kuznetsova  I. Lapshov  R. Krivonos  A. Semena  N. Semena  D. Serbinov  A. Shtykovsky  A. Yaskovich  V. Oleinikov  A. Glushenko  I. Mereminskiy  S. Molkov  S. Sazonov  V. Arefiev 《Experimental Astronomy》2018,45(3):315-350

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Peculiarities of solar-wind flow around the magnetosphere and the magnetopause position     

T.V. Kuznetsova  M.I. Pudovkin 《Planetary and Space Science》1978,26(3):229-236

MHD problems of solar wind interaction with the Earth's magnetosphere on the day-side are investigated. These ideas are used for the analysis of satellite data on the day-side magnetopause crossing. It is shown that the observed regularities may be adequately explained within the bounds of MHD-flow theory which includes the stagnation line at the nose of the magnetosphere. The ratio k of the magnetic field pressure to the plasma pressure in the vicinity of the subsolar point of the magnetosphere, which determines the magnitude of the interplanetary magnetic field penetrating into the magnetosphere, was estimated.  相似文献