Dr. Mariya P. Nikiforova Profile

Dr. Mariya P. Nikiforova

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Proceedings Article | 30 November 2017 Paper

Dynamics of surface temperatures at the Crimean peninsula territory

T. Danova, M. Nikiforova

Proceedings Volume 10466, 104665Z (2017) https://doi.org/10.1117/12.2287356

KEYWORDS: Climatology

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The analysis of the surface temperaturesvariability (monthly mean) over the period 1969-2014 by frequency of exceeding the climatic norm (1961-1990) is presented. An increaseof such situations in 3.5 times over entire Crimean peninsula territoryis revealed. “Strong exceeding” (from 2.0σ to 2.5σ) is characterized by an increase in the number of cases from 6% to 15% and “very strong exceeding” (>; 2.5σ) – from 0% to 18%. The value of coefficients in the “very strong exceeding” reaches 5.9σ. The pronounced effect of surface air temperature growing indicates an increase in threats which creates thermal stress on human health. The main categories are vulnerable elderly people, as well as the people do not acclimate to an unfamiliar thermal environment (in this category in most of the representatives of the tourist flow). While maintaining the observed trends, extreme heat periods will be a serious threat to the health of persons that has “epidemical” potential in the European region.

Proceedings Article | 29 November 2016 Paper

Dynamic parameters of the troposphere at occurrence of hazardous weather phenomena in the Black Sea region

T. Danova, M. Nikiforova

Proceedings Volume 10035, 100355Y (2016) https://doi.org/10.1117/12.2248768

KEYWORDS: Troposphere, Wind energy, Meteorology, Clouds, Humidity, Floods, Convection, Hazard analysis, Landslides, Environmental sensing

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This paper presents an analysis of the dynamic and energetic characteristics of the troposphere at occurrence of hazardous weather phenomena associated with cyclonic activity in the Black Sea Region. Formation of a powerful convection takes place at the presence of jet streams in the upper troposphere as well as wind velocity and direction shears in the lower and mid-troposphere. Peak values of kinetic energy are characteristic for the upper troposphere. Characteristic for catastrophic phenomena is a simultaneous combination of a number of conditions: a high moisture content of air masses at the condensation level and above it, convergence of air streams in the lower troposphere, the area leading to increase in ascending motions. In the lower troposphere, a clockwise wind rotation is observed which provides warm advection; in the upper troposphere, a counterclockwise wind rotation occurs. In cases of a tornado, the upper wind shear was observed near the lower level of increase in wind, in the 700-600 hPa layer.

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