نویسندگان
1 fars province
2 دانشگاه یزد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Rainfall as one of the most important elements of the climate has been discussed from various perspectives. Rainfall as one of the most important elements of the climate has been discussed from various perspectives. The purpose of this research is to use the PCI density index in the study of Iran's autumn precipitation pattern and to analyze its annual and seasonal comparative trend at selected stations. Be For this purpose, daily precipitation data of 38 stations were used during the statistical period of 1981-2010. The data matrix has a dimension of 3860 x 2760, the rows include days and columns and stations. The cluster analysis was used for zoning of rainfall index, and the MATLAB software was used to analyze the data and plot the graphs. In order to interpolate the PCI index, the usual Kriging method was used in GIS software. The results showed that autumn precipitation of Iran in terms of the index of PCI precipitation density is distinguishable into three distinct clusters of uniform, average and irregular precipitation. The results of zoning of the index in the monthly and annual scale showed that the southern and southeastern parts of Iran had high dispersion and dispersion in atmospheric rainfall, and the central and eastern regions had a moderate rainfall density. The northern, northwest, northeastern and central Zagros regions have a uniform concentration of rainfall. The precipitation uniformity in these regions is more and more than the other regions of the country and is more or less belong to Iran's most productive stations (the Caspian Sea, the provinces of Ardebil, Qazvin, Bojnourd) Average rainfall also belongs to stations with average rainfall
کلیدواژهها [English]
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