NPO Taifun

Kaluga, Russia

NPO Taifun

Kaluga, Russia
SEARCH FILTERS
Time filter
Source Type

Kashin F.V.,NPO Taifun | Akimenko R.M.,NPO Taifun | Aref'ev V.N.,NPO Taifun | Baranov Y.I.,NPO Taifun | And 3 more authors.
Izvestiya - Atmospheric and Ocean Physics | Year: 2010

The results of measurements of the concentration of carbon oxide (CO) in the atmospheric surface layer over the town of Obninsk (in European Russia, 105 km to the southwest of Moscow) are presented. Air samples were analyzed with the aid of a measuring system consisting of a Fourier-spectrometer and an optic multipass cell. The CO concentration was measured simultaneously with the measurements of air temperature up to a height of 300 m. The measurement data obtained from February 1998 to January 2009 suggest the presence of variations within the range 100-450 ppb (~80% of all the data) and nonperiodic relatively short-term and anomalously high CO concentrations that reach several ppm. The highest concentrations are due to CO accumulated in the surface air in the presence of temperature inversion and during forest fires. The measurements of the concentration of CO throughout a day revealed its morning and evening maxima, which coincide in time with the increased traffic current. The maxima and minima of seasonal variations in the monthly mean concentrations of CO, which are due to variations in the sources and sinks of CO that happen within a year, are observed in January and June, respectively. The amplitudes of seasonal variations amounted to (53 ± 10)% of the annual mean. The annual mean concentration of CO decreased by ~12% over the measurement period. A comparison was made with observational data obtained at five monitoring stations located in the latitudes that are close to the latitude of Obninsk. Over the European continent, the concentration of CO tends to decrease with a longitude decrease as it goes from east to west. © Pleiades Publishing, Ltd., 2010.


Ingel L.K.,NPO Taifun
Izvestiya - Atmospheric and Ocean Physics | Year: 2014

Attention is focused on a positive feedback that may play a significant role in intense vortices, such as tornadoes and, probably, tropical cyclones: rotation suppresses turbulence which, in turn, may intensify rotation. Some simple models illustrate this phenomenon. © 2014 Pleiades Publishing, Ltd.


Popov V.E.,NPO Taifun | Maslova K.M.,NPO Taifun | Stepina I.A.,NPO Taifun
Eurasian Soil Science | Year: 2014

The incubation of sandy soddy-podzolic soil with a three-component organomineral sorbent (OMS) on the basis of sapropel, neutralized hydrolysis lignin, and clay-salt slime under alternating wetting-drying (W-D) conditions for two years has increased the selective sorption of 137Cs by 2.5-5 times. The addition of 5% OMS increases the effect of periodic W-D cycles on the selective sorption of 137Cs compared to the addition of 10% OMS. The relationship between the 137Cs interception potential and the number of W-D cycles has been predicted on the basis of the additivity rule and under the assumption that this potential linearly depends on the number of W-D cycles. The predicted values of the 137Cs interception potential almost coincide with the experimental data for the mixtures of sandy soddy-podzolic soil with 10% OMS and are lower than the experimental values by 60% for the mixtures of soil with 10% OMS. © 2014 Pleiades Publishing, Ltd.


Kashin F.V.,NPO Taifun | Aref'ev V.N.,NPO Taifun | Sizov N.I.,NPO Taifun | Akimenko R.M.,NPO Taifun | Upenek L.B.,NPO Taifun
Izvestiya - Atmospheric and Ocean Physics | Year: 2016

Data on the volume concentration of carbon oxide (CO) in surface-air samples taken in European Russia, which were obtained using the Fourier transform spectroscopy method, are given. Over 16 years of measurements, this concentration decreased by 28%. These measured concentrations of CO are separated into its regional natural background and anthropogenic components. Seasonal variations in the concentration of CO are separated from its background concentration. Their extreme intra-annual values and mean amplitudes are determined. An empirical model of time variations in the concentration of CO is proposed. The atmospheric concentration of the CO anthropogenic component decreased by ~61 ppb over the measurement period. © 2016, Pleiades Publishing, Ltd.


Portnyagin Y.I.,NPO Taifun | Solov'eva T.V.,NPO Taifun | Merzlyakov E.G.,NPO Taifun | Pogorel'tsev A.I.,Russian State Hydrometeorological University | Savenkova E.N.,Russian State Hydrometeorological University
Izvestiya - Atmospheric and Ocean Physics | Year: 2010

Height-latitude distributions of the prevailing vertical wind for the mesosphere and lower thermosphere (70-110 km) are calculated on the basis of the empirical model of the monthly mean zonal mean prevailing horizontal wind. The presence of cellular structures is the main feature of the obtained vertical and meridional circulations. The ways such structures form and the problems of their modeling in global numerical models of the atmosphere are discussed. © Pleiades Publishing, Ltd., 2010.


Getmanov V.G.,Russian Academy of Sciences | Gvishiani A.D.,Russian Academy of Sciences | Kamaev D.A.,NPO Taifun | Kornilov A.S.,National Research Nuclear University MEPhI
Izvestiya, Physics of the Solid Earth | Year: 2016

The problem of the algorithmic recognition of anomalous time intervals in the time series of the sea-level observations conducted by the Russian Tsunami Warning Survey (RTWS) is considered. The normal and anomalous sea-level observations are described. The polyharmonic models describing the sea-level fluctuations on the short time intervals are constructed, and sea-level forecasting based on these models is suggested. The algorithm for the recognition of anomalous time intervals is developed and its work is tested on the real RTWS data. © 2016, Pleiades Publishing, Ltd.


Yaroshevich M.I.,NPO Taifun
Izvestiya, Physics of the Solid Earth | Year: 2011

A possible influence of tropical cyclones on seismic activity in the cyclonic zone of the northwestern Pacific is considered. There is no direct and sufficiently reliable method for calculating the degree of impact of tropical cyclones on the Earth's crust. Therefore, a sort of inverse problem is solved in the investigation: a possible qualitative influence of tropical cyclones on seismic activity is estimated from its intra-annual dynamics. It is established that for territories of the cyclonic zone, the intra-annual dynamics of cyclonic and seismic activities are similar. Low monthly mean values of the cyclonic and seismic energies are attained in July-October, whereas in the continental territories under consideration (Central Asia), the seismic activity is higher in January-March. The results obtained suggest that cyclones can affect the seismic regime in the cyclonic zone of the northwestern Pacific. © 2011 Pleiades Publishing, Ltd.


The exchangeable portion of the selectively sorbed 137Cs extractable by a 1 M ammonium acetate solution (α Ex) for soils, illite, bentonite, and tripolite was found to increase with the increasing concentration of the competitive cation M + (K + or NH 4 +) and can be approximated by a logarithmic relationship. For clinoptilolite, the values of α Ex did not depend on the concentration of M +. The expression 1 - α Ex(C M=n)/α Ex(C M= 16) as a function of the M + concentration (where α Ex(C M=n) is the α Ex value at the competitive cation concentration equal to 16 mmol/dm 3) was proposed to compare the dependence of α Ex on the concentration of K + or NH 4 +in different sorbents. For soils and illite, these dependences almost coincided, which indicated that the selective sorption of 137Cs in soils is determined by the presence of illite-group minerals. © 2011 Pleiades Publishing, Ltd.


Yaroshevich M.I.,NPO Taifun
Izvestiya - Atmospheric and Ocean Physics | Year: 2011

A chronological series of tropical cyclones is a flow of cyclonic activity where the bursts and calms of cyclonic activity alternate. Some interrelations between the stages of cyclonic activity have been studied. We derive the dependence that the length of the time interval between two consecutive of bursts of cyclonic activity have on a number of parameters of the first burst and the calm between the bursts. We find that one can estimate the intensity of the subsequent burst on the basis of the intensity of the previous burst. We derive a regression between the value of burst energy at a given time and the value of energy in the same burst for 1-3 days. © 2011 Pleiades Publishing, Ltd.


Ingel' L.K.,NPO Taifun
Izvestiya - Atmospheric and Ocean Physics | Year: 2011

A nonlinear analytical model of the near-water air layer is considered. In the model, the effect of spray droplets on turbulent exchange is taken into account through their effect on density stratification. To close the system of equations, a semiempirical turbulence theory in the Kolmogorov-Monin form is used. Unlike previous publications, we use an alternative closure scheme that seems more appropriate. A version is also proposed for generalizing the model to the case where heavy admixture particles (spray droplets) make a dominant contribution to the average density of a medium. This model allows a general analytical solution that, in principle, describes non-linear effects such as a decrease in the effective friction and "self-closure" of the heavy admixture in the near-surface layer because of turbulence suppression due to the strengthening of stratification stability. As the current data show, however, the intensity of spray production is probably insufficient to explain the recently discovered phenomenon of the aerodynamic-drag decrease (saturation) in storm winds. © 2011 Pleiades Publishing, Ltd.

Loading NPO Taifun collaborators
Loading NPO Taifun collaborators