VARIATION IN THERMODYNAMIC STRUCTURE OF PBL AS A MONSOON DEPRESSION PASSES——A CASE STUDY

• 作 者: G.Rakumar R.S.Saraswat B.Chakravarty
• 机 构: Department of Physics and Meteorology Indian Institute of Technology,Kharagpur 721 302,India,Departm
• 出 处: Acta Meteorologica Sinica
• 发表日期: 1993年01期
• 关键词: saturation inversion moist monsoon cloud conserved analysed A CASE STUDY humidit

Vertical profiles of virtual potential temperature,specific humidity,temperature at saturation points,moist staticenergies along with parcel condensing levels using minisonde data are analysed for two stations through which a mon-soon depression passed.The height of the cloud base came down as low as 910 hPa level from 835 hPa.Equivalent po-tential temperature increased in the vertical profile as well as in the conserved variable diagram as the depression ap-proached the station.Parcel condensing levels showed clearly inversion top and cloud top but not in all cases.Moist stat-ic energy showed an increase upto 10 kJ/kg as the depression approached.

Vertical profiles of virtual potential temperature, specific humidity, temperature at saturation points, moist staticenergies along with parcel condensing levels using minisonde data are analysed for two stations through which a mon-soon depression passed. Height of the cloud base came down as low as 910 hPa level from 835 hPa. Equivalent po-tential temperature increased in the vertical profile as well as in the conserved variable diagram as the depression ap-proached the station. Parcel condensing levels showed clearly inverted top and cloud top but not in all cases. Moist stat-ic energy showed an increase upto 10 kJ / kg as the depression approached.