Analysis Synoptic Patterns for Forest Fires Risk in Northern of Iran

Abstract

Iran is one of the countries in the Middle East and North of Africa that face high risk in terms of wildfire occurrence in forested areas. We had used the record data SLP, 850 and 500hpa, temperature, precipitation, relativity humidity, speed and direction wind and forest fire day by IRIMO Golestan province. Data of SLP, 850 and 500hpaduring study period extracted from NCEP/NCAR data site. At first, the forest fire day’s record by NRWM Golestan province. The addition, topography data obtain of DEM layers. The results show that: In the case of fire, wind speed increased, temperature 2 to 6cº will be increased but the relative humidity and precipitation are decrease trend. The analysis upper air data show that the fire occurred on the warm advection and increasing the thickness of the atmosphere in 1000- 500 hPa level. Other results obtained from the difference between warm season and cold season is the wind flow pattern. In cold season, the flow of the south (the Oman Sea and the Persian Gulf) and Alborz Mountains creates a foehn wind (Germich) and warm season the Azores high-pressure tab control and a low pressure (thermal low) in the heat in the desert of Turkmenistan suitable for northern wind and fires are created. Therefore, these patterns are reason wildland fire in Golestan province.

Keywords

• forest fire
• golestan province
• foehn
• upper atmosphere