排序方式: 共有21条查询结果,搜索用时 0 毫秒
1.
T. W. Krauss A. A. Sin’kevich N. E. Veremei Yu. A. Dovgalyuk V. S. Makitov V. D. Stepanenko 《Russian Meteorology and Hydrology》2011,36(2):102-111
Basing on airmass motion trajectory calculations over the Arabian Peninsula on April 10, 2008, it can be assumed that in the lower and middle troposphere, zones with increased air moisture exist due to air inflow from the Red Sea. As a result, mesoscale volumes of dry and moist air are neighboring, though large-scale field is comparatively homogeneous with low humidity. In the mesoscale zones, intense thunderstorm and hailstorm Cb clouds developed, whose characteristics and evolution are studied in the paper. Continuous radar observations of the clouds are carried out during 5 hours. Numerical simulation of the cloud evolution is performed with nonstationary 1.5-dimensional model. It is noted that under the mentioned atmospheric conditions, in the area under consideration, heavy rain and hail from the Cb clouds are observed. The main factors of their origination are high thermal instability of the atmosphere and moist air inflow from outside. 相似文献
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Water Resources - The effect of the horizontal dimensions of inland water bodies (lakes and reservoirs) on the vertical mixing processes is studied. We consider a three-dimensional hydrostatic... 相似文献
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Dymnikov V. P. Zalesnyi V. B. Glazunov A. V. Stepanenko V. M. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(4):321-328
Izvestiya, Atmospheric and Oceanic Physics - This paper is dedicated to the memory of Vasily Nikolaevich Lykosov, a prominent Russian scientist and a specialist in the field of mathematical... 相似文献
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GPS Solutions - Helical antennas have been developed that feature a cutoff pattern and are suitable for practical positioning at millimeter level. The antennas are in the form of a tube with... 相似文献
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T. W. Krauss A. A. Sin’kevich N. E. Veremei Yu. A. Dovgalyuk V. S. Makitov V. D. Stepanenko 《Russian Meteorology and Hydrology》2011,36(3):167-174
Development of a long-living Cb cloud in the desert part of Saudi Arabia on April 10, 2008 is analyzed. Continuous satellite and radar observations of the cloud are carried out during five hours. Numerical modeling of the cloud is performed using a nonstationary 1.5-dimensional model. Data on the Cb cloud and its anvil development dynamics are obtained. It is shown that the anvil characteristics differ significantly in the zone of its formation directly over the cloud and when moving away from it. It is pointed out that the radar underestimates the anvil sizes. Estimation of precipitation rate from the cloud under study by means of satellite and radar measurements is compared against the results of numerical modeling. It is found that precipitation rate could reach 100 mm/h. The radar estimates of the precipitation rate are significantly overstated, which is, in this case, due to presence of large hail particles. 相似文献
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Dmitry Tatarnikov Vladimir Filippov Igor Soutiaguine Andrey Astahov Anton Stepanenko Pavel Shamatulsky 《GPS Solutions》2005,9(3):194-201
An antenna ground plane (GP) plays a major role in the mitigation of multipath coming from underneath the antenna. A distinct
trend in user antenna size and weight reduction has been observed during recent years. With this focus in mind, an overview
of conventional flat conductive and impedance GP is provided. Results of modern developments of passive vertically stacked
structures are discussed. The possibility of obtaining a reasonable level of multipath mitigation with vertical structures
of several centimeters is shown. 相似文献
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Agakhanov A. A. Stepanenko D. A. Zubkova N. V. Pautov L. A. Pekov I. V. Kasatkin A. V. Karpenko V. Yu. Agakhanova V. A. Škoda R. Britvin S. N. Pushcharovsky D. Yu. 《Geology of Ore Deposits》2021,63(7):654-667
Geology of Ore Deposits - Abstract—This paper describes the first Na-dominant member of the beryl group, named avdeevite. The sample, which became its holotype, was found in a granitic... 相似文献
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K. V. Barskov A. V. Glazunov I. A. Repina V. M. Stepanenko V. N. Lykossov I. Mammarella 《Izvestiya Atmospheric and Oceanic Physics》2018,54(5):462-471
Micrometeorological measurements in the atmospheric boundary layer over a hilly forest terrain have been made on a meteorological tower at several levels from the forest canopy top to a height that exceeds the height of trees almost seven times. A semiempirical length scale depending on the local topography features and the underlying surface type has been proposed and calculated. This scale has been shown to allow the universal functions of the Monin–Obukhov similarity theory to be corrected for a stable atmospheric boundary layer over complex terrain without substantial modification when compared to the universal functions over a homogeneous surface with small roughness elements. This approach can be used to refine the methods for calculating turbulent momentum fluxes from profile measurements over spatially inhomogeneous landscapes. 相似文献
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A. A. Sin’kevich N. E. Veremey N. N. Volkov Yu. A. Dovgalyuk V. D. Stepanenko G. G. Shchukin 《Russian Meteorology and Hydrology》2010,35(10):665-672
Results are presented of complex study of the clouds during the modification works aiming to prevent precipitation. To estimate
the modification effect, a new technique is presented based upon comparison of the IR-radiometer measurements data, from the
Meteosat satellite, on radiation temperature of the clouds after modification and those in natural development cycle. It is
shown that for the case under study, radiation temperature increase is observed in the pixel corresponding to the city in
which precipitation should be prevented. 相似文献