Asfezary National Gridded Daily Precipitation Data Base (Version 3)

Environmental studies require an environmental gridded database. Environmental change, and climate change studies are not possible without a gridded climate database. In those environmental studies that cover a geographical area, but the necessary data is available for a restricted number of points (for example, meteorological stations) and not for the entire area under study, interpolation is required to convert the point data to areal data. In other words, it is necessary to create a network database.The first sample of such databases for Iran called Asfezari was introduced in 1996 at the University of Isfahan. This article introduces the process of preparing the third version of the Asfazari rainfall database prepared at the University of Isfahan. This gridded rainfall database is provided in a conical Lambert projection system. Its temporal resolution is daily and its spatial separation is ten kilometers. This database covers the daily rainfall of the mainland of Iran from 1349/01/01 to 1394/12/29. The error in estimating the average rainfall in this database is less than 15%. In preparing this database, the daily rainfall data of 2188 meteorological stations (including synoptic stations, climatic stations and rain gauge stations) of the Meteorological Organization of Iran (IRIMO) have been used.