مدهاي بهنجار امواج داخلي - مدلي براي ايجاد ساختار هاي لايه اي در اقيانوس (خليج فارس )

Turbulence and internal waves are important in generating layered sructures in frontal region of marine environments (e.g. near river plumes outflow into the sea). Here we investigate the role of normal modes of internal waves in generation of layered structure in a portion of Persian Gulf where river plume enters and in some laboratory experiments. The model prediction and observations show that layers have formed a thickness of about 5m based on horizontal velocity profiles. Laboratory experiments with a plume outflow in a Filling Box profile also generate normal mode layered structure with A/H = 0.5 (Where A is layer thickness and H is the plume depth). Qualitative comparison between layered structure in field and laboratory is good. It should be emphasized that field observation is for semi-enclosed seas but the laboratory experiments are for enclosed region. Hence some of the discrepancies in the results of two cases are inevitable.