摘要
陆地表面上行长波辐射(UPLW)是全球变化研究中关键因子之一,提高其计算精度将有助于在气象和气候研究中得到可以接受的能量计算误差。为此,利用均匀植被热红模型THERM5A,首先模拟出各个方向的亮度温度,然后对方向性亮温进行半球积分,从而得到上行长波的热辐射值。通过与各个方向的热辐射值比较发现,LAI从0.5变化到3.0时,半球平均热辐射的最佳替代角度在55°至47°之间变换。
Upwelling long-wave radiation is a key factor of global climate change.To improve the calculation accuracy is help to get acceptable energy calculation error.Therefore,the uniform vegetation thermal infrared model THERM5A was implemented to simulate directional brightness temperatures.After integrating directional brightness temperature hemisphere,we obtained the heat radiation value of upwelling long-wave.When LAI was changed from 0.5 to 3.0,the best alternative angle of the hemispheric average heat radiation varied from 55° to 47° by comparing heat radiation of related directions.
出处
《气象与环境科学》
2011年第1期14-18,共5页
Meteorological and Environmental Sciences
基金
国家自然科学基金"方向性亮度温度与半球积分热辐射的关系研究"(40801139)资助
