نوع مقاله : مقاله پژوهشی

نویسنده

استادیار مرکز پژوهشی علوم جغرافیا و مطالعات اجتماعی

چکیده

پدیده گرد و غبار یکی از پدیده­های مخرب و رایج در نواحی خشک و بیابانی ایران و جهان است که آثار زیان­باری بر  زندگی انسان و محیط­زیست دارد. هدف از این پژوهش، بررسی آماری تعداد وقوع گرد و غبار برای بازه زمانی 1990 تا 2016 برای کل ایران می­باشد. در این تحقیق تغییرات تعداد وقوع گرد و غبار در ماه­­های سال­های مورد مطالعه (2016-1990) برای 30 ایستگاه کشور مورد تحلیل قرار گرفت و به بررسی همبستگی بین ایستگاه­ها در چهار منطقه و کل کشور پرداخته شد. نتایج تعداد وقوع گرد و غبار در فصول مختلف در کشور حاکی از آن است که تابستان و زمستان به ترتیب بیشترین و کمترین رخداد گرد و غبار را در کشور دارد. هم­چنین نتایج نشان دهنده آن است که ماه­های جولای و دسامبر به ترتیب بیش­ترین و کم­ترین تعداد گرد و غبار را در بیشتر ایستگاه­های کشور نسبت ماه­های دیگر دارند. نتایج بررسی­ها نشان داد که زابل و زنجان به ترتیب بیش­ترین و کم­ترین تعداد گرد و غبار را به ترتیب با 3666 و 130 رخداد در طول سال دارند. نتایج بیان­کننده آن است بیشتر ایستگاه­های کشور دارای همبستگی معنی­داری از لحاظ وقوع گرد و غبار در سطح 95  و 99 درصد بودند که حاکی از آن است که تقریبا بیشتر کشور دارای شرایط مشابه از نظر توفان گرد و غبار می­باشند. نتایج هم­چنین حاکی از آن بود که ایستگاه­هایی که از لحاظ جغرافیایی که نزدیک همدیگر بودند دارای ضریب همبستگی بالاتری بودند.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the Trend of Changes and Correlation Between the Occurrence of Dust in Iran

نویسنده [English]

  • Mahdi Boroughani

Assistant Professor of Research Center for Geoscience and Social Studies, Hakim Sabzevari University

چکیده [English]

Dust phenomenon is one of the destructive and common phenomena in arid and desert areas of Iran and the world that has harmful effects on human life and the environment. The purpose of this study is to statistically investigate the number of dust occurrences for the period 1990 to 2016 for the whole of Iran. In this study, the number changes of dust occurrences in months of the studied years (1990-2016) were analyzed at 30 stations in the country, and the correlation between stations at four regions and the whole country was investigated. The results of the occurrence number of dust in different seasons in the country indicated that the highest and lowest occurrence of dust in the country were in summer and winter, respectively. The highest and lowest dust levels were on July and December, respectively, in most stations in the country compared to other months. Also, the results showed that Zabol and Zanjan had the highest and lowest dust levels with 3666 and 130 events during the year, respectively. Most of the stations in the country had a significant correlation in terms of dust occurrence at the level of 95 and 99%, which indicates that almost most of the country have similar conditions in terms of dust storm. The results also showed that the stations that were geographically close to each other had a higher correlation coefficient.

کلیدواژه‌ها [English]

  • Correlation
  • Dust
  • Iran
  • Synoptic Station
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