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Your search keyword '"Vasiliy Bogomolov"' showing total 3 results
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3 results on '"Vasiliy Bogomolov"'

1. Balloons and Quadcopters: Intercomparison of Two Low-Cost Wind Profiling Methods

Author

Mikhail Varentsov, Victor Stepanenko, Irina Repina, Arseniy Artamonov, Vasiliy Bogomolov, Natalia Kuksova, Ekaterina Marchuk, Artem Pashkin, and Alexander Varentsov

Subjects
wind speed, wind profiling, atmospheric boundary layer, UAV, quadcopter, drone, Meteorology. Climatology, QC851-999
Abstract

Experimental field campaigns are an essential part of atmospheric research, as well as of university education in the field of atmospheric physics and meteorology. Experimental field observations are needed to improve the understanding of the surface-atmosphere interaction and atmospheric boundary layer (ABL) physics and develop corresponding model parameterizations. Information on the ABL wind profiles is essential for the interpretation of other observations. However, wind profile measurements above the surface layer remain challenging and expensive, especially for the field campaigns performed in remote places and harsh conditions. In this study, we consider the experience of using two low-cost methods for the wind profiling, which may be easily applied in the field studies with modest demands on logistical opportunities, available infrastructure, and budget. The first one is a classical and well-known method of pilot balloon sounding, i.e., when balloon is treated as a Lagrangian particle and tracked by theodolite observations of angular coordinates. Second one is based on a vertical sounding with a popular and relatively cheap mass-market quadcopter DJI Phantom 4 Pro and utilizes its built-in opportunity to restore the wind vector from quadcopter tilt angles. Both methods demonstrated reasonable agreement and applicability even in harsh weather conditions and complex terrain. Advantages and shortcomings of these methods, as well as practical recommendations for their use are discussed. For the drone-based wind estimation, the importance of calibration by comparison to high-quality wind observations is shown.

Published
2021
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2. Modeling of heat and moisture transfer in the active layer of land using various parameterizations of the moisture potential of the hydraulic flow and the moisture conductivity coefficient, taking into account various pedotransfer functions and descritization of the organic and mineral composition in depth

Author

Anna Ryazanova, Vasiliy Bogomolov, Egor Dyukarev, and Victor Stepanenko

Subjects
soil, modelling, pedotransfer functions
Abstract

Soil plays an important role in energy and water exchange between the earth's surface and the atmosphere. Soil, water, and energy balances are the main tools for modeling the processes occurring in the surface layer of the atmosphere, which include surface runoff, infiltration, groundwater recharge, and phase transitions. To adequately reproduce and estimate soil moisture and temperature in models of the active land layer, a set of necessary parameters is required that represent the hydraulic, thermal, and mechanical properties of the soil., Russian Academy of Sciences basic research project 121031300158-9 RSCI: https://www.elibrary.ru/item.asp?id=47472004

Published
2021
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3. Verification of temperature and humidity conditions of mineral soils in the active layer model

Author

Vasiliy Bogomolov, Dyukarev Egor, and Stepanenko Victor

Abstract

Detailed monitoring of the temperature of the soil layer provides a unique experimental material for studying the complex processes of heat transfer from the surface layer of the atmosphere to soils. According to the data of autonomous devices of air temperature, it was found that within each key area there are no significant differences between the observation sits. According to the annual (2011-2018) observations of the temperature regime of the soil and ground, it has been found that the microclimatic specificity of bog ecosystems is clearly manifested in the characteristics of the daily and annual variations in soil temperature. A regression model describing the change in the maximum freezing depth during the winter has been proposed, using air temperature, snow depth and bog water level as predictors. The effects of BWL and snow cover have similar values, which indicates an approximately equal contribution of BWL variations and snow depth to changes in freezing. The thickness of the seasonally frozen layer at all sites is 20-60 cm and the maximum freezing of the peat layer is reached in February-March. Degradation of the seasonally frozen layer occurs both from above and below.It was found that similar bog ecosystems in different bog massifs have significantly different temperature regimes. The peat stratum of northern bogs can be both warmer (in winter) and colder (in summer) in comparison with bogs, located 520 km to the south and 860 km to the west.

Published
2020

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