Numerical simulation of the marine boundary layer characteristics over the Bay of Bengal as revealed by BOBMEX-98 Pilot experiment

Journal of Earth system science

N V Sam1¹  A N V Satyanarayana1¹  U C Mohanty1¹  Swati Basu2²  V N Lykossov3³ 

[1] Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, New Delhi, India.$$;National Centre for Medium Range Weather Forecasting, New Delhi, India.$$;Institute of Numerical Mathematics, Moscow, Russia.$$

关键词: BOBMEX;    Turbulent Kinetic Energy;    Marine Boundary Layer;    flux.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

An attempt has been made to study the marine boundary layer characteristics over Bay of Bengal using BOBMEX (Bay of Bengal and Monsoon Experiment) pilot experiment data sets, which was conducted between 23rd October and 12th November 1998 on board ORV Sagar Kanya. A one-dimensional multi- level atmospheric boundary layer with TKE-𝜀 closure scheme is employed to study the marine boundary layer characteristics. In this study two synoptic situations are chosen: one represents an active convection case and the other a suppressed convection. In the present article the marine boundary layer charac- teristics such as temporal evolution of turbulent kinetic energy, height of the boundary layer and the air- sea exchange processes such as sensible and latent heat fluxes, drag coefficient for momentum are simulated during both active and suppressed convection. Marine boundary layer height is estimated from the vertical profiles of potential temperature using the stability criterion. The model simulations are compared with the available observations.

【 授权许可】

Unknown