SOME CHARACTERISTICS OF ATMOSPHERIC BOUNDARY LAYER OVER MAKASSAR

Jurnal Ilmu Kelautan Spermonde

关键词: atmospheric boundary layer;    atmospheric stability;    AERMET;    boundary layer height;   

DOI  :  

学科分类：农业科学（综合）

来源: Universitas Hasanuddin

【 摘 要 】

Some upper air atmospheric parameters measured during period of 2011-2016 by means of radiosonde located atHasanuddin International Airport were examined for characterization of boundary layer over Makassar, Indonesia.These data, combined with surface atmospheric parameters were used to calculate some boundary layer parametersusing AERMET model which based on Monin-Obukhov similarity theory. The obtained Monin-Obukhov length whichreflecting atmospheric stability then converted into traditional Pasquill-Gifford stability classification. Examination ofwind characteristics of wind showing clearly their dependence of the day, season and height. Winds dominantly flowsfrom the southeast during the daytime with the relatively larger velocity and from the northwest with smaller velocityduring the nighttime. Interpretation of monin-obukhov length using Pasquill-Gifford stability classification showingthat the atmosphere was dominantly unstable during the daytime and dominantly stable during the nighttime. Theseatmospheric stabilities were also varied during seasons. The height of convective boundary layer (CBL) was start to risein the morning and reaching its maximum in the afternoon (18:00) at the mean value of 2 km. Meanwhile, the height ofmechanical boundary layer (MBL) during the day time forming parabolic curve with its maximum value of 1.2 km atnoon. These indicated that any released pollution from the stack will be less dispersed during the nighttime due to thefact of lower mixing height, lower wind speed, atmosphere become more stable, and it dispersed in different directioncompare to the daytime.

【 授权许可】

CC BY