مدلسازی عددی آنومالی مغناطیسی ناشی از پارامترهای هیدروفیزیکی در خلیج فارس

نوع مقاله : مقاله پژوهشی

نویسنده

دانشگاه صنعتی مالک اشتر شیراز

چکیده

در این پژوهش، تغییرپذیری زمانی و مکانی آنومالی مغناطیسی ناشی از پارامترهای هیدروفیزیکی در منطقه خلیج فارس با استفاده از مدل عددی MITgcm شبیه­ سازی شده است. در این مدل­سازی، گسسته­ سازی معادلات به روش حجم محدود انجام شده است. نتایج شبیه­ سازی، تغییرپذیری فصلی و مکانی آنومالی مغناطیسی را در منطقه مورد مطالعه نشان می­دهد. به طوری­که در فصول زمستان و بهار، آنومالی میدان مغناطیسی در جنوب خلیج­ فارس مشاهده می­شود که بیشینه­ شدت آن در نواحی جنوبی به طور پراکنده از nT 30 در زمستان به کمتر از nT 20 در فصل بهار می­رسد. در فصل تابستان، دو نوار آنومالی مغناطیسی در آبهای نواحی شمالی و جنوبی خلیج فارس شکل می­گیرد که در فصل پاییز این دو نوار به ناحیه­ ی مرکزی خلیج­ فارس جابجا شده و ترکیب می­شوند و با هم یک نوار آنومالی مغناطیسی پهن را در مرکز خلیج فارس تشکیل می­دهند

کلیدواژه‌ها


عنوان مقاله [English]

Numerical Modeling of Hydro-Physical Parameters Induced Magnetic Anomaly in the Persian Gulf

چکیده [English]

In this research, temporal and spatial variability of the magnetic anomaly induced by hydro-physical parameters
have been simulated using MIT-gcm numerical model. In this modeling, the discretization of equations has been
done using finite volume method. The results specify the space and seasonal variability of magnetic anomaly in
the study region. In winter and spring, a magnetic anomaly can be observed in the south of Persian Gulf, which
its maximum intensity reaches from 30nT in winter to 20nT in spring. In summer, two magnetic anomaly bands
form  in  the  north  and  south  of  the  Persian  Gulf.  In  autumn,  these  two  narrow  bands  shift  to  the  Centre  of  the
Persian Gulf and combine together then produce an extended band of anomaly of magnetic field in the center of
the Persian Gulf.
 

کلیدواژه‌ها [English]

  • Magnetic anomaly
  • marine currents
  • Persian Gulf
  • electro-magneto static equations
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