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مقاله پژوهشی: تأثیر شدّت باد بر توسعۀ ترموکلاین در خلیج فارس در تابستان | ||
| فیزیک کاربردی ایران | ||
| مقاله 5، دوره 11، شماره 3 - شماره پیاپی 26، مهر 1400، صفحه 49-67 اصل مقاله (1.04 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22051/ijap.2021.35791.1204 | ||
| نویسنده | ||
| سید مجید مسدد* | ||
| گروه فیزیک، واحد شوشتر، دانشگاه آزاد اسلامی، شوشتر، ایران | ||
| چکیده | ||
| خلیج فارس یک دریای نیمه بستۀکم عمق است که از طریق تنگۀهرمز به اقیانوس آزاد متّصل می شود. ترموکلاین به صورت کاهش شدید دما با عمق در لایۀزیرسطحی در نتیجۀ طبقه بندی ستون آب در خلیج فارس به صورت فصلی روی می دهد. واداشت هایی از جمله باد شمال غربی بر این فرایند تأثیر دارند. در این مقاله، نتایج اندازه گیری های گشت تحقیقاتی مونت میشل 1992 و یک مطالعۀعددی (مدل اقیانوسی پرینستون POM) با تنش باد در دو حالت ثابت و میانگین ماهیانه به بررسی تشکیل و توسعۀترموکلاین تابستانه در خلیج فارس پرداخته می شود. نتایج مدل نشان می دهند که با باد متغیر ماهیانه، ترموکلاین مانند آنچه اندازه گیری های تابستان نشان می دهند، توسعه می یابد. به نظر می رسد تشکیل ترموکلاین اکسیژن محلول در ستون آب ناشی از کمبود اختلاط را در نتیجۀ چینه بندی آب ایجاد شده کاهش می دهد؛ البتّه تشکیل و توسعۀ ترموکلاین به صورت یک شیب سریع دما در ستون آب بر انتشار صوت به کار رفته در کاربرد ابزار آشکارسازی در دریا تأثیر دارد. رشد ترموکلاین در خلیج فارس از بهار به تابستان با سرعت بیشتری رخ می دهد که در برخی از منابع این تحقیق در خلیج فارس به این نتیجه رسیده اند. ضرایب همبستگی دما و شوری بین نتایج مدل و اندازه گیری ها به ترتیب 86/0 و 80/0 به دست آمده اند. در این مقاله نتایج تحقیق به دست آمده از مدل POM با اندازه گیری ها مقایسه می شود. | ||
| کلیدواژه‌ها | ||
| خلیج فارس؛ ترموکلاین؛ مدل عددی؛ POM؛ تنش باد | ||
| عنوان مقاله [English] | ||
| Research Paper: The Effect of Wind Stress on Thermocline Development in Persian Gulf in Summer | ||
| نویسندگان [English] | ||
| Seyed Majid Mosaddad | ||
| Department of Physics, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran. | ||
| چکیده [English] | ||
| Persian Gulf (PG) is a shallow semi-enclosed sea that connects to the open ocean through the Strait of Hormuz. Thermocline occurs as a sharp decrease in temperature with depth in the subsurface layer as a result of water column classification in Persian Gulf on a seasonal basis. Impulses such as the northwest wind affect this process. In this paper, according to the results of Monte Michel research (1992) and the numerical study of Princeton ocean model (POM), with wind stress in both steady state and monthly average, the formation and development of summer thermocline in PG is investigated. The model results show that with the monthly variable wind, the thermocline develops as indicated by the summer observations. The formation of thermocline seems to decrease the dissolved oxygen in the water column due to lack of mixing as a result of induced stratification. The formation of thermocline seems to reduce the dissolved oxygen in the water column due to the lack of mixing, which is created as a result of water stratification. Also, the formation and development of thermocline as a fast temperature gradient in the water column affects the sound propagation used in offshore detection devices. According to the results of some sources of this research, The thermocline development happens more rapidly in Persian Gulf from spring to summer. Correlation coefficients of temperature and salinity between the model results and measurements were 0.85 and 0.80, respectively. In this paper, the research results obtained from the POM model are compared with the measurements. The rate of thermocline development was found to be between 0.1 to 0.2 meter per day in the Persian Gulf during the 6 months from winter to early summer | ||
| کلیدواژه‌ها [English] | ||
| Persian Gulf, Thermocline, Numerical Model, POM, Wind Stress | ||
| مراجع | ||
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