نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان آذربایجان شرقی
2 محقق مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان آذربایجان شرقی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Aim: Investigation of the relationship between droughts and the number of days associated with dust in East Azerbaijan Province.
Material & Method: First, using the correlation equation, the missing value of the number of days with dust of the synoptic stations was completed in the last 30 years. Then, the trend of this data was checked by the Mann-Kendall test. The frequency and severity of droughts were calculated using the SPEI method in the R program, and then, the impact of droughts on the occurrence of dust was evaluated through the Spearman correlation test.
Finding: The presence of a trend in the data series at a significant level of 0.05 has been confirmed, and the Sen’s slope values also indicate that this trend is increasing. The results of the SPEI index show that drought periods are expanding especially in the second half of selected period in the region. On the other hand, there was a significant correlation at the 0.01 level between the number of days with dust and SPEI-6 drought index.
Conclusion: The playa of Urmia Lake is the main focus of local dust generation and this fact is confirmed based on the correlation between the dust with the SPEI index and also the observation of suspended particles with lake origin in the air of the stations near this lake.
Innovation: This research aims to reveal the correlation between the occurrence of dust phenomena in connection with the continuation of droughts and the expansion of the playa of Lake Urmia, which has calculated the SPEI index based on the latest statistics of meteorological stations. Conducting such research is very necessary to evaluate the tempo-spatial distribution of wind erosion, identify areas at risk of desertification, and formulate control strategies for these areas.
کلیدواژهها [English]
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