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1.
Yermakov A. N. Aloyan A. E. Arutyunyan V. O. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(1):72-78
Izvestiya, Atmospheric and Oceanic Physics - The effect of ammonium sulfate ((NH4)2SO4) on the condensation of low-volatile organic compounds in atmospheric aerosol is considered. Using the UNIFAC... 相似文献
2.
Aloyan A. E. Yermakov A. N. Arutyunyan V. O. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(3):246-253
Izvestiya, Atmospheric and Oceanic Physics - The results of numerical calculations of the variability of number concentrations of aerosol particles of different sizes and the rates of ion-induced... 相似文献
3.
A. E. Aloyan A. N. Yermakov V. O. Arutyunyan 《Izvestiya Atmospheric and Oceanic Physics》2016,52(4):353-364
We estimate the impact of sulfate aerosols on cloudiness formation over the sea in the middle troposphere and the involvement of these particles in the formation of polar stratospheric clouds (PSCs) in the lower stratosphere. The first of these problems is solved using a combined model of moist convection and the formation of cloudiness and sulfate aerosols in the troposphere and lower stratosphere over the sea, incorporating natural emissions of sulfur-containing compounds. We have found that a significant source of condensation nuclei in the troposphere is the photochemical transformation of biogenic dimethyl sulfide (in addition to NaCl). The results of numerical experiments indicate that the absence of sulfate aerosols hinders the cloudiness formation over the sea in the middle and upper troposphere. The problem of sulfate aerosol involvement in the formation of supercooled ternary solutions (STSs) (PSC Type Ib) in the lower stratosphere is solved using a mathematical model of global transport of multicomponent gas pollutants and aerosols in the atmosphere. Using the combined model, numerical experiments were performed for the winter season in both hemispheres. Sulfate aerosols were found to really participate in the formation of STS particles. Without their participation, the formation of STS particles in the lower stratosphere would be hindered. We present the results of numerical calculations and discuss the distribution of concentrations of gaseous nitric and sulfuric acids, as well as mass concentrations of these components in STS particles. 相似文献
4.
I. D. Eremina A. E. Aloyan V. O. Arutyunyan I. K. Larin N. E. Chubarova A. N. Yermakov 《Izvestiya Atmospheric and Oceanic Physics》2017,53(3):334-342
Based on atmospheric precipitation monitoring data for Moscow, we have revealed a number of episodes when the content of hydrocarbonates repeatedly surpasses the equilibrium level. These facts are associated with the complex structure of precipitation, which is caused by differences in the chemical composition of condensation nuclei. As a result, the underlying surface involves two groups of drops with acidities of different nature. The acidity of the first (“metal”) group is determined by the carbonate equilibrium with atmospheric CO2 and dissolved carbonates of alkaline and alkaline earth metals. The acidity of the second (“ammonium”) group is characterized by the balance between ammonia absorbed from the air and atmospheric acids. Because of this, the precipitation acidity measured during the monitoring is regulated not only in the air but also in the condensate collector. The mixing of the metal and ammonium groups of precipitation is accompanied by only a partial conversion of hydrocarbonates into dissolved CO2. Its termination is hindered when CO2 actually ceases to enter the atmosphere due to mass-exchange deceleration. As a result, the content of hydrocarbonates in the collector exceeds the equilibrium level. Some estimates indicate that the acidity of the ammonia component of precipitation can be much higher than the acidity according to monitoring data. This should be taken into account in estimating the health and environmental impacts. The true level of acid rain hazard can be estimated only by measuring the acidity of individual drops, whereas the results obtained with modern tools of monitoring can underestimate this hazard. 相似文献
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6.
A. N. Yermakov L. P. Golobokova O. G. Netsvetaeva A. E. Aloyan V. O. Arutyunyan T. V. Khodzher 《Izvestiya Atmospheric and Oceanic Physics》2018,54(2):162-172
Monitoring data on the ion composition of precipitation and the water-soluble fraction of aerosol have been used to identify two types of aerosol particles in the surface atmosphere of Irkutsk (“metal” and “ammonia” groups). The aerosol acidity is basically governed by the acidity of ammonia particles, and the ion composition depends on air relative humidity (RH). Preliminary estimates are given for the distribution of major cations and anions by aerosol groups. 相似文献
7.
Aloyan A. E. Yermakov A. N. Arutyunyan V. O. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(1):104-109
Izvestiya, Atmospheric and Oceanic Physics - This paper describes a new numerical model of transport and transformation of gaseous and aerosol species in the atmosphere incorporating... 相似文献
8.
Field data on the ion composition and mass
concentration of aerosol in the rural (Wingene) and urban (Antwerp)
regions of Belgium and the results of their thermodynamic analysis are
presented. Ammonium nitrate and ammonium sulfate are found to be the
major water-soluble components of aerosol particles. The seasonal
variability of mass concentration, phase state, and ion composition of
aerosol particles is largely determined by variations in temperature and
relative humidity. It is shown that the content of ammonium nitrate and
ammonium sulfate in PM2.5 is close to their thermodynamic
equilibrium concentrations. 相似文献
9.
A. E. Aloyan A. N. Yermakov V. O. Arutyunyan 《Izvestiya Atmospheric and Oceanic Physics》2010,46(6):713-726
A combined three-dimensional numerical model of convective cloudiness with detailed microphysics and a model of the transport
of atmospheric trace gases with gas- and aqueous-phase chemistry were developed. We consider the main physical mechanisms
responsible for the formation of midsized droplet clouds and the transport of gases with differing solubility therein. Test
numerical calculations were performed to investigate the sensitivity of the cloud model to variations in input parameters,
as well as the variability of the ion composition of cloud drops with regard to their size distribution. The results of numerical
calculations are presented with a preliminary analysis. 相似文献
10.
A. E. Aloyan A. N. Ermakov V. O. Arutyunyan V. A. Zagainov 《Izvestiya Atmospheric and Oceanic Physics》2010,46(5):608-622
A combined mathematical model has been developed to reproduce space and time variations in the concentrations of multicomponent
gas constituents and aerosols in the atmosphere on both regional and urban scales. This model contains blocks of transport
of gas constituents and aerosols in the atmosphere with consideration for homogeneous binary nucleation, the kinetic processes
of condensation/evaporation and coagulation, chemical processes occurring in both gas and liquid phases, and the processes
of mass exchange during the gas-droplet (particle) interaction. A nonhydrostatic model of atmospheric mesoscale processes
is used to calculate the fields of meteorological elements and turbulent characteristics. The generation of new-phase particles
from precursor gases by the mechanism of homogeneous binary nucleation and their interaction with background aerosol are considered.
The results of numerical experiments are compared with the data obtained from field observations of both space and time variations
in the concentrations of gas constituents and aerosols and in the ionic content of aerosol particles over the Baikal region
under the influence of emissions from powerful industrial sources. 相似文献