تحقیقات کاربردی علوم جغرافیایی

تحقیقات کاربردی علوم جغرافیایی

استخراج و تحلیل الگوهای سینوپتیک و پایش منشاء و مسیر عبور توفان‌های گردوغبار مطالعه موردی: استان اردبیل، ایران

نویسندگان
1 عضو هیات علمی گروه جغرافیای طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران
2 دانشگاه محقق اردبیلی، اردبیل، ایران
چکیده


امروزه ریزگردها و توفان­های گردوغبار به یکی از مسائل و مشکلات مهم کشور ایران و سایر مناطق جهان تبدیل شده است. این پژوهش درصدد استخراج الگوهای سینوپتیک توفان­های گردوغبار استان اردبیل و پایش و منشأیابی مکان برخواست آن به انجام رسیده است. بازه زمانی موردمطالعه 34 ساله (2013 1979) می­باشد. از داده­های ایستگاه­های سینوپتیک استان اردبیل و داده‌های سطوح فوقانی جو سازمان ناسا جهت انجام پژوهش پیش­رو استفاده به عمل آمد. جهت نیل به اهداف پژوهش از روش­های محیطی به گردشی، خوشه­بندی سلسله مراتبی و مدل HYSPLIT بهره گرفته شد. با توجه به نتایج حاصل شده 3 الگوی ارتفاع ژئوپتانسیل تراز 500 هکتوپاسکال شناسایی گردید. الگوی شماره 1 و 2 تقریباً مشابه به یکدیگر بوده و بیانگر رخ­داد ناوه عمیق است که از اروپای مرکزی شکل‌گرفته و تا نیمه­های دریای سرخ امتداد داشته است. در الگوهای یادشده منطقه مورد مطالعه در شرق ناوه مذکور قرار داشته است. الگوی سوم بیانگر رخ­داد بلوکینگ بریده کم­فشار بر فراز دریای سیاه و مناطق هم‌جوار و قرارگیری استان اردبیل در شرق ناوه متشکل از بلوکینگ می­باشد. منشأ ریزگردها در الگوهای 1 و 2 نواحی شرقی کشور عراق و غرب کشور ایران و در الگوی شماره 3 در ارتفاع 500 هکتوپاسکال نواحی مرکزی کشور عراق و در ارتفاعات 850 و 1000 هکتوپاسکال نواحی مرکزی کشور سوریه می­باشد.

واژگان کلیدی: توفان گردوغبار؛ استخراج الگو؛ تحلیل سینوپتیک؛ مدل HYSPLIT؛ استان اردبیل




کلیدواژه‌ها

عنوان مقاله English

The extraction of synoptic patterns, and monitoring the origin and pathway of dust storms; Case study: Ardabil province, Iran

نویسندگان English

Behrouz Sobhani 1
Mehdi Aalijahan 2
1 Department of Natural Geography, University of Mohaghegh Ardabili: Ardabil, Iran
2 University of Mohaghegh Ardabili: Ardabil, Iran
چکیده English



Today, fine dust and dust storms have become one of the important issues and problems of Iran and other regions of the world. This study is conducted to identify synoptic patterns of the dust storms in Ardabil Province (Iran) and monitor the origin and pathway of its places. The studied period is 34 years (1979-2013). The data used in this work are from synoptic stations of Ardabil province and the NASA’s upper atmosphere database. To achieve the goals of the study, the Environment to Circulation, Hierarchical Clustering Methods, and HYSPLIT model were used. According to the results, three patterns of geopotential height at 500 hPa levels were identified. Pattern No. 1 and 2 are almost similar to each other and represent the occurrence of a deep trough that formed from Central Europe and extended to the middle of the Red Sea. Based on these patterns, the study area is located in the East of this trough. The third pattern represents the occurrence of cut-of-low pressure blocking over the Black Sea and adjacent areas and placement of Ardabil province in the East trough of the formed blocking. The origin of dust in patterns 1 and 2 is the Eastern regions of Iraq and West of Iran while in pattern 3 is at 500 hPa level of the central areas of Iraq and at pressure levels of 850 and 1000 hPa of the central regions of Syria.

Keywords: Dust storm, Pattern extraction, synoptic analyses, HYSPLIT model, Ardabil province



کلیدواژه‌ها English

Dust storm
Pattern extraction
synoptic analyses
HYSPLIT model
Ardabil province
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