شبیه سازی و تحلیل عددی طوفان گردوغبار 10 جولای 2014 با مدل های جهانی در ایران مرکزی

نوع مقاله : پژوهشی

نویسندگان

1 استادیار گروه مهندسی طبیعت، دانشکده منابع طبیعی دانشگاه جیرفت

2 استادیار پژوهشکده هواشناسی و علوم جو، سازمان هواشناسی کشور

3 دانشجوی دکترای علوم و مهندسی آبخیز، دانشکده‌ی منابع طبیعی، دانشگاه تهران

چکیده

پدیده‌ی گردوغبار یکی از دشواری‌های زیست­محیطی در منطقه‌ی ایران مرکزی است، به­طوری­که سالانه زیان‌های زیادی به  بوم‌نظام‌های طبیعی و انسانی وارد می­کند. ذره‌های گردوغبار سبب بیماری‌های تنفسی پرشماری شده است و از این راه بر تن‌درستی جامعه تاثیر می‌گزارد. کاهش دید ناشی از رخ‌دادهای گردوغبار هر ساله سبب لغوشدن پروازها و تصادف‌های جاده‌‌یی شده‌است و سبب زیان‌های مالی و جانی بسیاری می‌شود. پژوهش در این‌باره و شناسایی منشاء و چشمه­های گردوغبار اهمیت زیادی دارد. شبیه‌سازی و تحلیل عددی طوفان­های شدید گردوغبار با مدل‌های پیش‌بینی عددی یکی از روش­های نوین پژوهش این پدیده است. هدف از این پژوهش شبیه‌سازی طوفان گرد­و­غبار 10 جولای 2014 برای کمی‌سازی وتحلیل عددی آن است. از مدل MACC-ECMWF بهره‌گرفته‌شد. خروجی‌های مدل برای کمیت‌های عمق دیداری هواپخش و غلظت گردوغبار استخراج و مجموعه‌ی زمانی تغییر این دو کمیت در گام زمانی یک ساعته بررسی شد. تحلیل مکانی مقدار عمق دیداری هواپخش  و غلظت گردوغبار نشان داد که بیابان مرکزی ایران در استان‌های سمنان، شرق اصفهان، و بیابان لوت مرکزی در شرق استان کرمان بزرگ­ترین چشمه­ی گردوغبار ایران مرکزی است، و در روی‌داد گردوغبار نقش مهمی دارد. بررسی مجموعه‌ی زمانی دو کمیت عمق دیداری هواپخش و غلظت گردوغبار نیز نشان داد که در این پژوهش بیشینه‌ی مقدار آن‌ها در نیمه­های شب حدود ساعت 23:00 بود.

کلیدواژه‌ها


عنوان مقاله [English]

Simulation and Numerical Analysis of Dust Storm of July 10, 2014 Using the MACC-ECMWF Model in Central Iran

نویسندگان [English]

  • Farshad Soleimani Sardo 1
  • Sara Karami 2
  • Farzaneh Vakili Tajareh 3
1 Assistant Professor, Department of Nature Engineering, Faculty of Natural Resources, Jiroft University
2 Assistant Professor, Institute of Meteorology and Atmospheric Sciences, Meteorological Organization of I.R. of Iran
3 Ph.D. Student in Watershed Science and Engineering, Faculty of Natural Resources, University of Tehran
چکیده [English]

Dust storms, one of the environmental problems in Central Iran, annually damage natural and human ecosystems. The dust has irreversible effects on human societies, including respiratory diseases and declining public health. Therefore, performing research on this subject and identifying the origin of dust is of great importance. Simulation and numerical analysis of severe dust storms are one of the new methods of studying this phenomenon. For the numerical analysis of dust, data related to the storm of July 10, 2014, and the MACC-ECMWF model were used for simulation. The results of the MACC-ECMWF model were extracted based on the Aerosol Optical Depth indices and dust concentration. The time series of the changes in the value of the AOD indices and dust concentration in a one-hour period indicated that the values ​​of these two indices had an increasing trend and reached a maximum at 23:00. Also, spatial analysis of the Aerosol Optical Depth and dust concentrations showed that the Central Desert of Iran, extending from Semnan and East Isfahan Provinces to the Central Loot Desert in the east of the Province of Kerman, is the largest dust source in Central Iran.

کلیدواژه‌ها [English]

  • AOD index
  • dust concentration
  • MACC-ECMWF model
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