Determination of the vertical variations in temperature and longwave radiation within the gray Earths troposphere using radiative equilibrium profile model

International Journal of Physical Sciences

Mudasiru A. Olajire¹ 

关键词: Radiative equilibrium profile;    temperature;    longwave radiation;    troposphere.;   

DOI  :  10.5897/IJPS2013.3975

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

This study estimated the vertical variation in mean temperatureswithin the tropospheric layerusing theradiative equilibrium profile model and longwave radiation with Stefan-Boltzmann equation at a tropical meteorological station located besides Physics Building (7.55°N:4.56°E), Obafemi Awolowo University, Ile-Ife, Nigeria.In the model, the height of the troposphere was assumed to be 16.0x 100km andthe standard effective mean temperature (255K) in the tropics was used in estimating the tropospheric mean temperatures for two layers: the ground surface (1.6 x 10-3km) and the top of the troposphere (16.0 x 100km). Arithmetic progression expression was then used to obtain the temperatures and longwave radiations for 16 equal sub-layers within thevertical height of the Earth’s troposphere. Our results showed that the estimated ground layer temperature (33.3°C) and longwave radiation (499.1 Wm-2) for the meteorological station were comparable with the observed (31.9°C; 490.0 Wm-2). Both the temperature and radiation were found to decrease with altitude within the tropospheric layers. The study concluded that the model performed reasonably in estimating the vertical profile of temperatures and longwave radiation over the study area.

【 授权许可】

CC BY