| چکیده انگلیسی مقاله |
Climate change due to global warming can major challenges context to water resources and desertification. Arid and semi-arid areas usually have sensitive ecosystems, that can be damaged quickly. In recent years, climate change can reduce vegetation cover by decreasing rainfall and drought. Declined vegetation cover can lead to some consequences, including dust storms (DS). DS can effect on climate, crops, biodiversity, ecosystems and, most importantly, human health. The purpose of this study is to investigate the temporal and spatial changes of DS in Kermanshah province, Iran. Kermanshah province shares a boundary with Iraq, which has dust source. Data on the intensity and frequency of dust was received from the synoptic station of the province in the statistical period of 2001 to 2019. The results of this study show, that the number of days of DS with foreign origin in most stations of the province in different years has been much more than the number of days with dust of domestic origin. This shows that the province is very affected by the dust of neighboring areas. The highest and lowest number of recorded foreign and domestic dusts were related to Sarpol-e-Zahab and Islamabad-e-Gharb stations, respectively. In these two stations, 175 and 34 days of DS were recorded during the study period, respectively. Which can indicate the availability of conditions for this region in terms of DS production and the creation of an internal dust source rather than to other parts of the province. In terms of the number of DS, Sarpol-e-Zahab and Islamabad-e-Gharb stations with 6250 and 75 DS have the maximum and minimum numbers during the study period, respectively. In spring and summer, the highest number of days and in winter, the lowest number of local and extra-local dust in all stations studied. The results of this study can enable managers and planners to prioritize different areas in proportion to the severity and frequency of occurrence of fine DS, and be able to take the necessary actions. |
