摘要
大气下行辐射是地表辐射和能量平衡中的一个关键参数,在反演地表温度和发射率、开展气候变化研究中起着关键作用。基于现有的大气下行辐射测量方法的分析比较,开展了合肥大气下行长波辐射的研究。利用MODTRAN辐射传输模型模拟计算了合肥大气下行辐射通量,并以该方法获取的大气下行辐射通量为基准,对广泛应用的晴天经验模型进行性能评价,验证了Idso模型和Ångstrom模型对于合肥大气条件的适用性。进而利用MODTRAN辐射传输模型模拟数据对Idso模型中的参数进行修正,提高了该模型的模拟精度。该研究为方便快捷准确地获取合肥大气下行辐射通量提供了可靠方法。
Atmospheric downward radiation is a key parameter in surface radiation and energy balance.It plays a key role in retrieving surface temperature and emissivity and in the study of climate change.Based on the analysis and comparison of the existing atmospheric downward radiation measurement methods,the research of atmospheric downward longwave radiation of Hefei,China,is carried out.Hefei downward atmospheric radiant flux is simulated and calculated by using MODTRAN radiation transmission model,and then taking the atmospheric downward radiant flux obtained by this method as benchmark,the performance of the widely used sunny day empirical model is evaluated,and the applicability of Idso model andÅngstrom model to Hefei atmospheric conditions is verified.In addition,the parameters in the Idso model are modified by using MODTRAN radiation transmission model simulation data to improve the simulation accuracy of the model.This study provides a reliable method for conveniently,quickly and accurately obtaining Hefei atmospheric downward radiant flux.
作者
张允祥
李新
韦玮
黄冬
ZHANG Yunxiang;LI Xin;WEI Wei;HUANG Dong(Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)
出处
《大气与环境光学学报》
CAS
CSCD
2022年第4期383-392,共10页
Journal of Atmospheric and Environmental Optics
基金
国家重点研发计划,2018YFB0504604。
关键词
大气下行长波辐射
经验模型
参数修正
大气辐射传输模型
atmospheric downward longwave radiation
empirical model
parameter correction
atmospheric radiation transmission model
