Вісник Київського національного університету імені Тараса Шевченка

ГЕОГРАФІЯ

Bulletin of Taras Shevchenko National University of Kyiv

GEOGRAPHY

INDICATORS OF TEMPERATURE ANOMALIES OF REGIONAL CLIMATE

Shevchenko О. Snizhko S.Oliynyk R.,  Kostyrko I

Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

Abstract:
Climatic indices are usually created for a particular group or sector of influence, and because of their complexity they cannot be universal and apply for more than one region. In addition, a methodology is needed that would allow studying of changes in the index over a long period of time using climatological data (both models and observations). That is why there are many metrics (or indexes) that try to provide quantitative information about the periods of extreme heat. Since there are many different climatic regimes in one region, it is necessary to focus on observations of extreme temperatures over the research territory. Thus, the anomalies of the air temperature regime that were recorded at 18 meteorological stations of Ukraine during the reference period of 1981-2010 were considered in this study. To assess the effects of hot events (especially heat waves) for a selected region, it is important to know how the climate indicator is evaluated. To assess the effects of hot events, in particular, heat waves, for a particular region, it is important to know how the climate indicator is evaluated this event because there is a certain risk that the inadequate index distorts the climatological information, which in turn leads to ineffective planning of adaptation and mitigation. Therefore, it is necessary to use the index of a climatic event, which could be easily calculated based on the regional climatic data and which could provide comprehensive information that characterizes the heat event which is observed. The latest studies show, the HWMI index is considered an alternative index of temperature regime. HWMI indices were calculated based on the analysis of the maximum daily air temperature series for the calendar year. This was achieved due to the temperature thresholds established on a single metric, which is the most important for which the heat waves were identified and estimated. The annual thresholds of maximum daily air temperature for different reference periods (1961-1990 and 1981-2010) were investigated. It was found out, there is the difference in the threshold values of maximum air temperature during the year for the indicated reference periods only in winter (January-February) and in summer (July-August) and did not exceed 3°С. The field of maximum temperature thresholds for the reference period, which focuses on the south-east of the country, is established. The spatial variability of temperature thresholds along the zonal and meridional sections was studied, which allowed optimizing the grid for the construction of the regional field of threshold extreme temperatures.

Keywords:
temperature thresholds, temperature anomalies, waves of heat, waves of heat wave propagation, index of heat wave magnitude.

Language:
Ukrainian

DOI: http://doi.org/10.17721/1728-2721.2019.73.3

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Suggested citation:

Shevchenko О., Snizhko S., Oliynyk R.,  Kostyrko I. (2019) Indicators of temperature anomalies of regional climate. Visnyk Kyivskogo nacionalnogo universytetu imeni Tarasa Shevchenka, Geografiya [Bulletin of Taras Shevchenko National University of Kyiv, Geography], 1 (73), 15-19 (in Ukranian, abstr. in English).