اهمیت روش تیکه‌نگاری صوتی در مطالعات اقیانوس‌شناسی

نوع مقاله : مقاله مروری

نویسندگان

1 موسسه تحقیقات آب

2 عضو هیات علمی و معاون پژوهشی، موسسه تحقیقات آب، تهران

3 عضو هیات علمی، موسسه تحقیقات آب،‌تهران

4 دانشجوی دکتری گروه مهندسی مکانیک بیوسیستم دانشگاه تهران، تهران

چکیده

پایش پیوسته و بلند مدت دما و جریان‌های اقیانوسی به‌منظور درک بهتر دینامیک اقیانوس‌ها و همچنین بررسی اثر گرمایش جهانی بر اقیانوس‌ها حائز اهمیت است. روش تیکه‌نگاری صوتی[i] یکی از ابزارهای کارآمد جهت پایش اقیانوس‌ها است. روش تیکه‌نگاری صوتی براساس قانون زمان طی شده امواج صوتی و با محاسبه اختلاف زمان رسیدن امواج صوتی در ایستگاه‌های مختلف، خصوصیات جریان آب را محاسبه می‌کند. دستگاه‌های تیکه‌نگاری صوتی اقیانوسی با ارسال امواج صوتی با بسامد کمتر از ۱ کیلوهرتز، قادرند دما و سرعت جریان‌ را در مقیاس ده هزار کیلومتری اندازه‌گیری نمایند. در این تحقیق علاوه‌بر بررسی مبانی تئوری روش تیکه‌نگاری صوتی، پژوهش‌های انجام شده در این خصوص مورد مطالعه قرار گرفته است. با توجه به انتقال فناوری تیکه‌نگاری صوتی به ایران، با به‌کارگیری این روش در شمال اقیانوس هند و جریان‌های ورودی به تنگه هرمز، اطلاعات ارزشمندی در اختیار محققان قرار خواهد گرفت.
 
[i]. Acoustic Tomography

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Application of Acoustic Tomography method to oceanographic studies

نویسندگان [English]

  • Reza Roozbahani 2
  • Mortaza Eftekhari 3
  • Mehran Sadeshi Deloei 4
1
2 Assistant Professor, Water Research Institute, Tehran, Iran
3 Assistant Professor, Water Research Institute, Tehran, Iran
4 PhD candidate, Tehran University
چکیده [English]

Continuous/long-term monitoring of ocean temperatures and currents is important to better understanding of ocean dynamics as well as to study the effect of global warming on the oceans. Acoustic Tomography (AT) is one of the most effective techniques for monitoring the oceans. The AT technique calculates the flow characteristics based on the travel time law of the acoustic waves and computes the difference in the time of arrival of the acoustic signals at different stations. Oceanic AT instruments measure the temperature and currents in the scale of tens of thousands of kilometers by transmitting acoustic waves of less than 1 kHz. In this research, firstly, the theoretical fundamentals of the AT technique are discussed, then, the important researches are investigated. Due to the technology transferring of AT systems to Iran, applying this technique in the northern Indian Ocean and the Strait of Hormuz will provide valuable information to the researchers and decision-makers.

کلیدواژه‌ها [English]

  • Ocean Acoustic Tomography
  • Continuous monitoring of temperature and current
  • Worldwide research
 
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