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Применение кластерного анализа для оценки температурно-влажностных условий в период активной вегетации на территории юга Западной Сибири и его связь с гидротермическим коэффициентом Т. Г. Селянинова

Применение кластерного анализа для оценки температурно-влажностных условий в период активной вегетации на территории юга Западной Сибири и его связь с гидротермическим коэффициентом Т. Г. Селянинова

Abstract

In today's changing climate, agricultural companies of Western Siberia are interested in finding a modern methodology for assessing agro-climatic conditions and solutions to problems of zoning, with the subsequent optimization of agro-climatic resources used. For solving these tasks, the problem of estimating the temperature and humidity conditions of the area is researched. This research examines the subject of territorial zoning on a more qualitative and modern level, based on the automatic systematization of the mean values of the fields of SHC (Selyaninov Hydrothermal Coefficient) using hierarchical cluster analysis. The paper presents an analysis of the spatial index values of SHC, which were subjected to clustering followed by obtaining versions for classification. The resulting variations were subjected to statistical testing of the classification, with application of quality criteria for choosing a real and meaningful classification. The statistical evaluation of the quality of the variants identified the more correct number of classes, namely, zoning and site assessment according to three classes, which subsequently had a similarity with the well-known classification of SHC for production of temperature-humidity conditions assessment of the territory. It turned out that the conditions with increased values of temperature and humidity belong to the first class, the second class expresses conditions of optimum moisture content, and the third insufficient one. Also, the classes received quasi-latitudinal distribution in space and this picture corresponds to the distribution of the SHC index of the territory. After the conducted research with hierarchical cluster analysis application the objective method helped to create a scientifically based classification complying with the already known, physically based scale of SHC classification. Besides, the presented method of cluster analysis, allowed us to save computation time and to compress the information, which is an important factor in usage of large data sets. In general, by the results of predictive assessment of climate warming, with the condition of SHC index changing, we can assume that the boundaries of agro-climatic zones, classified by the combination of heat and humidity, would migrate away to the northern and eastern territories, but more southern areas would often be subjected to droughts of different intensities. Thereby, while the current trends of climate changing are persevered, during the next 100-200 years the south of Western Siberia has all the prerequisites for increasing of agro-climatic potential, which is due to the northern and eastern areas.

Для решения задач оценки территории была проведена автоматическая систематизация средних значений полей гидротермического коэффициента Селянинова с применением иерархического кластерного анализа. Проведена статистическая оценка полученных классов с применением критерия качества, которая в последующем была подтверждена физическим смыслом классификации.

Keywords

ТЕПЛОВЛАГООБЕСПЕЧЕННОСТЬ ТЕРРИТОРИИ, КЛАСТЕРНЫЙ АНАЛИЗ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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