Climate classification is a description of the climatic conditions of an area, which is mostly used in conversations climate classification inethods that have been traditionally ised in the past (include the Koppen, de Martonne, Emberger, etc.). that these methods are hased on specific and limited climatic factors such as precipitation and temperature, So they have limitations in some situations.
therefore, the present research has been done in order to achieve a specific thearetical framework for oletermining country's climate, as well as correst scientific fing planning day according to its local and natura " realities, as well as climate stullies.
in this research paper, in order to introduce eind present a new climate classification system in accordance with the real climate of Iran, from the statistics of 325 synoptic weather stations belonging to the Iran Meteorological Organization, which are distributed among 31 provinces of the country, in the period (1370-1399) hos been used
For this purpose and modification of existing methods. and also introducing a classification compatible with local weather conditions and observing the specific limits of global climate parameters from the classification methods of displacement-combination-adjustment-expansion-elimination of incompatible climate classification as well as the inversion of some used climate classes and analysis and analysis
Based on this and based on comparing the performance and efficiency of valid and accepted climate systems by international authorities, 6 correction indicators including location, temperature, rainfall, dryness, sunny hours and temperature comfort range have been investigated, analyzed and described. After introducing the capabilities and how they work, the implementation of the new climate classification method for Iran has been implemented.
The findings and achievements of this research show the innovations of determining the climate of a region, which is an example of Mehrabad meteorological station in Tehran in the initial period of 30 years, as follows.
In Tehran, rainfall distribution is in the cold period of the year. This city has a semi-tropical annual climate with low temperature variations and hot summers and cold winters.
In the following, the detailed information of this city has been prepared based on the analysis of the mentioned indicators and shows the following results:
In terms of location:
The city of Tehran, with global bioclimate index, is continental and with regional bioclimate border, it is located in dry land and semi-elevated plateau.
In terms of temperature:
This region has an annual subtropical climate with hot summers and semi-cold winters.
In terms of rainfall:
Tehran has about a quarter of the global average rainfall (average global rainfall is 580 mm) and the temporal distribution of rainfall in the cold period of the year, which is associated with the irregularity of annual rainfall.
In terms of dryness:
Tehran city has dry weather in 9 months of the year and wet weather in only 3 months of the year.
In terms of sunny hours:
Tehran has average solar radiation with the most sunny hours in August (11.2 hours) and the lowest sunny hours in February (5.7 hours).
In terms of temperature comfort:
The need for cooling and heating for human comfort is 1033 and 1460 degree days per year, respectively.