The role of the subtropical jet stream in cyclogenesis over the Central Mediterranean Sea: A case study of February 1974

International Journal of Physical Sciences

Elham Mobarak Hassan¹ 

关键词: Cyclogenesis;    subtropical jet;    divergence;    positive vorticty advection (PVA).;   

DOI  :  

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

The Mediterranean Sea is recognized as one of the most important locations for cyclogenesis. In the course of this study,therole of subtropical jet stream in the formation of a deep cyclone over the central part of the Mediterranean Sea during 21 to 23, February 1974,wasstudied. The analysis based on NCEP data showedthat there was a strong link between the presence of a subtropical jet along the African coast of Mediterranean Sea with the core speed of 60 to 70 ms-1and its associated secondary circulation with the formation of that cyclone. Analysis also showedthat there were strong positive vorticity advection at 500 hpa and divergence in horizontal wind field at 200 hpa surfaces that led to the occurrence of ascending motion maxima at the time of the formation of the cyclone.

【 授权许可】

CC BY