Improvement of the Selyaninov HTC to expand the possibilities of its application

Abstract

   The main points that determined the necessity and essence of the development of the complex hydrothermal coefficient (HTCc) are given. This method should be considered as a process of improving the hydrothermal coefficient of Selyaninov G.T. The proposed HTCc allows for a more detailed characterization of the territory. The complex HTCc includes two components: the tangential HTCt and the radial HTCr. In the graphical representation of HTCc, it is rational to allocate zones corresponding to HTCt within which to form zones corresponding to HTCr. The distribution of HTCc in the Novosibirsk region is given. The value of the tangential zone interval is chosen constant and is 0.2 mm/degree. The size of the radial zone varies slightly to exclude small formations at the boundaries of the zones. The given map-scheme of agro-landscape zoning of the Novosibirsk region allows to compare it with the distribution of HTCc. A certain similarity between them emphasizes the correspondence of the complex HTCc to those natural processes that determine the development of plants. An example of the application of HTCc when it is displayed on a small-scale map is given. It is shown that when moving in a selected zone of the map of the Russian Federation from north to south the average value of the radial component consistently changes from 70.5 to 155. This corresponds to a change in the conditions for vegetation growth, while the preceding HTC is in the same interval. The transition to a complex HTCc also provides an opportunity to assess the distribution of certain plants on new territories with increasing warming. Based on the provisions of the model determining the development of plants depending on weather conditions, it is possible to identify a set of parameters of a particular plant. These parameters correspond to the optimum values of temperature and precipitation at certain phenological phases of the plant and determine their corresponding climate indicators, and by the proximity of these sets assess the level of favorability of the spread of the plant.