Assessment based on the output Aphrodite database of rainy days Iran

Knowledge of the amount, spatial and temporal distribution of precipitation days is essential to plan.as a strategic axis for the future planning should be considered. The vast territories of Iran between Siberia in the north, the Mediterranean in the West, the deserts of Africa in Saudi Arabian Sea and the largest country in the South West and the East India factor for the interaction of different weather systems on Iran; and one each in the range of years according to a system to bring Iranian, Iran affect climate. Deep interaction, complex and continuous of precipitation caused by climate change and other elements of diversity in space and time was this element is; However, climate studies will be valuable when researchers have provided real time data; weather stations valuable information about the amount and frequency of rainfall courses are available to researchers, however, measurement stations rainfall is usually in population centers or research centers have been special. The aim of this study is knowing what Analyze number of days of rain before Iran, with output in the range of 56 database-annual Aphrodite (01/01/1951 to 31/12/2007 AD) is
In this study, data from the database to Analyze rainy day Iran - is Aphrodite, the Middle East (APHRO_ME) of the final product of this database as v1101, by resolution 25/0 × 25/0 by 56-year period (1 / 1/1951 to 31/12/2007 AD) is used. To divide the country into zones rainfall zone stepwise regression methods as well as for zoning rainy days rainy days kriging method has been optimized.
Has in every area of rainfalls and the time is different. Skewness provided shows that the spatial distribution of precipitation is skewed to the right, the low-rainfall areas than in areas with high rainfall. According to the terms dynamic and thermodynamic systems, causing precipitation and depending on your geographic location, in dealing with local conditions can cause precipitation regions differently. Therefore, the amount of precipitation has statistical parameters will be different. The difference in median, mean and deviation indicates that the data does not follow a normal distribution.
The number of rainy days between 9 to 147 days. Iran is the average number of rainy days is 38 days, while the number of rainy days is 36/62% of the area of the country less than 38 days. The region's rainy day in terms of number of rainy days 147 South West of the Caspian Sea (32 km south of West synoptic Bandar Anzali) is located. Similarly, the lowest number of rainy days with 9 days in South East Iran Iran is located 116 kilometers East of Khash synoptic stations.
The results showed that the average of rainy days is 38 days, however, the number of rainy days is 36/62% of the area of the country less than 38 days. The maximum rainfall Iran on the Caspian Sea is located at 147 days in the South West, on the other hand a minimum of 9 days rainy days in the South East is Iran. Iran was divided into four zones Likewise, Iran's biggest drawback is divided into four zones rainy days of the entire north coast, the northern part of North Khorasan, North West and West Highlands in a group. Finally, the division offered the best division's zone of rainy days, divide the country into six zones were detected. The six zones are zones Khzrry with rainy days 126 days, across the mountainous regions of West, North West and Northeast with rainy days 77 days across mountainous 57 days, zone bar between the highlands and lowlands of leeward of the 38 Days of Rain, Finally, the relationship between the number of rainy days with latitude and height above sea level for the entire zone between Iran and six zones was rainy. Relationship provided for the entire region of Iran was presented by a factor of 0.57 determine the most important factor in the equation, longitude were identified. Although differences between the average and maximum number of rainy days Iran with other research such as (Alijani, 1389) and Masoodian (1390), which it named difference with this study is the research database, but acknowledged evaluate.