Analysis of observed and projected interannual variability in the summer season onset,length, and end dates across the Iran     

Sedaghat  Mahdi  Nazaripour  Hamid 《Theoretical and Applied Climatology》2022,147(1-2):549-558

Theoretical and Applied Climatology - It is very important to study the role of global warming on the variability of summer characteristics in arid and semi-arid climates such as Iran, because of...  相似文献   

Spatial contribution of one-day precipitations variability to rainy days and rainfall amounts in Iran   总被引：2，自引：0，他引：2  

H. Nazaripour  M. R. Mansouri Daneshvar 《International Journal of Environmental Science and Technology》2014,11(6):1751-1758

Rainfalls with short persistency are the tangible characteristics of arid and semiarid regions such as Iran. Iran is an arid and semiarid region with dramatic tempo-spatial changes of rainfall. In this regard, the short persistency of rainfall is approximately observed from 1 to 7 days in whole parts, while the greater ones are only separated in eastern parts of Iran. According to the results, the rainfall persistency is ranged from 1 to 45 days, but the maximum amount and rainy days are generated by rainfalls with short persistency. So, the rainfall events with long persistency are considered as an extreme event with extreme variability. One-day precipitations generate the maximum rainy days and rainfall amounts, especially in eastern parts of Iran. Decrease in the one-day precipitations contribution to eastern parts may indicate to decrease in regional precipitation. However, decrease in contribution in western parts may indicate to increased amounts of rainfall at other persistency rates. Our results revealed that the contribution of the one-day precipitation to general rainfall has reductive trends in almost 17.5 % of the whole Iran. The most integrated and significant reductive trend of one-day precipitation contribution to rainfall spreads northeastern and eastern parts of Iran. However, in the western parts of Iran, decreasing one-day precipitation contribution to rainy days affects to increase in the diurnal rainfall. The mentioned variability can be considered as the climate change signals in respect of one-day precipitation.  相似文献   

Rain gauge network evaluation and optimal design using spatial correlation approach in arid and semi-arid regions of Iran     

Nazaripour  Hamid  Mansouri Daneshvar  Mohammad Reza 《Theoretical and Applied Climatology》2017,129(3-4):1255-1261

Theoretical and Applied Climatology - The present study is aimed at evaluation of a rain gauge network in order to optimize a network design. In this regard, point rainfall estimations were...  相似文献