排序方式： 共有31条查询结果，搜索用时 15 毫秒
1.
Doklady Earth Sciences - This paper describes a new approach to calculating the vertical turbulent diffusion coefficient and its variability, based on the use of modern asymptotic analysis in the... 相似文献
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Zakharova S. A. Elansky N. F. Verevkin Y. M. Davydova M. A. 《Doklady Earth Sciences》2022,504(1):326-331
Doklady Earth Sciences - A new approach to the problem of determining the density of emission fluxes of anthropogenic impurities from distributed urban sources by the rate of growth of the integral... 相似文献
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N. F. Elansky 《Izvestiya Atmospheric and Oceanic Physics》2009,45(2):207-220
This review contains the most important results obtained in the studies of atmospheric ozone in 2003–2006. It is part of the Russian national report on meteorology and atmospheric sciences that was prepared for the International Association of Meteorology and Atmospheric Sciences (IAMAS). This report was considered and approved at the XXIV General Assembly of the International Union of Geodesy and Geophysics (IUGG). 相似文献
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Elansky N. F. Shilkin A. V. Ponomarev N. A. Zakharova P. V. Kachko M. D. Poliakov T. I. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(1):80-94
Izvestiya, Atmospheric and Oceanic Physics - The location of Moscow on a plain within higher latitudes when compared to other megacities creates conditions for the chemical transformation of... 相似文献
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Doklady Earth Sciences - Wavy spatial variations in the contents of trace gases are identified using plane measurements of O3 concentrations in the medium troposphere and the total content (TC) of... 相似文献
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Elansky N. F. Golitsyn G. S. Crutzen P. J. Belikov I. B. Brenninkmeijer C. A. M. Skorokhod A. I. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(1):72-90
Izvestiya, Atmospheric and Oceanic Physics - Results obtained in the course of unique observations (as part of the TROICA project) of the composition and state of the atmosphere over Russia have... 相似文献
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Oksana A. Tarasova Sander Houweling Nikolai Elansky Carl A. M. Brenninkmeijer 《Journal of Atmospheric Chemistry》2009,63(1):49-71
Presented is a detailed comparison of CH4 and δ13C–CH4 measurements with simulations of the global transport model TM3. Experimental data were obtained during campaigns along the
Trans-Siberian railroad in the framework of the TROICA project. Two summer (1999 and 2001) and one spring (2003) expeditions
are evaluated. Model simulations include sensitivity tests to further investigate the isotopic composition of natural gas
and emissions from Siberian wetlands. Comparison of the average mixing ratio of methane and its isotopic composition (δ13C) has been performed for different geographic zones, including the European part of Russia, Western Siberia and Central Siberia.
Simulations are in reasonable agreement with the measurements for the European part of Russia and confirm a high contribution
of natural gas to the observed methane levels. An increase of emission from bogs shifts the simulated methane isotopic composition
closer to the observations. The relative importance of the Western Siberia emissions in current inventories is underestimated
in comparison with other wetland regions in the former USSR. Simulated average mixing ratios are in a good agreement with
the observations in Central Siberia, while 13C(CH4) values tend to be higher than measured in all considered scenarios. These results point to a bias in the modeled source
mixture over Russia, which could be repaired by shifting emissions from isotopically heavy methane sources (e.g. coal, oil
or biomass burning) to light sources (e.g. wetlands, ruminants, waste treatment). Alternatively, the average isotopic signature
of Siberian wetlands may be lighter than expected. 相似文献
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The dynamics of meteorological parameters, of sodar data on the temperature stratification of the atmospheric boundary layer, and of surface contents of pollutants (nitrogen oxides, carbon monoxide, and ozone) during the passage over Moscow of a structurally complex prominent cold front are discussed. It is shown that the cold front passage is accompanied by stepwise increases in the NO, NO2, and CO surface contents. A probable cause of this phenomenon is a quick entrainment of smoke plumes from high-altitude sources of pollution into the surface turbulent air near the frontal boundary. Intense advection of cold air at the rear of the cyclone can lead to the development of an unstable stratification in the atmospheric boundary layer even in the nighttime. Under these conditions, the minute-scale variability of contents of trace gases increases abruptly as compared to that occurring in the frontal zone of the cyclone prior to the passage of the front. This effect is statistically significant. The dynamics of surface ozone reflects an increase in its background concentrations in arctic air masses. 相似文献