[A-AS06] 台風研究の新展開～過去・現在・未来

[AAS06-P14] Role of VHTs and Helical flow organization in the formation of Tropical Cyclogenesis over North Indian Ocean

*EMMANUEL RONGMIE^1,4、Medha Deshpande²、Mano Kranthi Ganadhi¹、Sopan Tukaram Ingle³、Phani Murali krishna² (1.Research Scholar in Indian Institute of Tropical Meteorology Pune、2.Scientist D in Indian Institute of Tropical Meteorology Pune、3.Professor and Director in K.B.C. North Maharashtra University, Jalgaon、4.North Maharashtra University, Jalgaon)

キーワード：helicity, Tropical Waves, Mesoscale Convective Systems

Tropical Cyclogenesis (TCs) remains one of the most complex enigmas of dynamic meteorology. Many environmental factors contribute to the genesis of TCs. The main objective of this study is to understand ‘why’ and ‘how’ Mesoscale convective vortices (MCVs) cluster and the role of Vortical Hot towers (VHTs) in the Tropical Cyclones (TC). Reanalysis and satellite data for various cases of TC shows that the Mesoscale convective system (MCS) interaction in the presence of a large Scale. Multiple waves interact and modulate different requisite parameters compared to the presence of individual waves. To understand the interaction of MCVs and VHTs in the Pregenesis period, a numerical simulation experiment is carried out using ‘Model for Prediction across Scales (MPAS)’ focused over the Indian. Linkage of the primary and secondary circulation in the developing and non-developing TCs, the total kinetic terms and scalar quantity, total helicity are examined. Role of different component of horizontal and vertical helicity is examined. The importance of the study is to investigate the validity of helicity as an indication of large scale vortex instability.