利用MODIS资料计算不同云天条件下的地表太阳辐射
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摘要
利用MODIS气溶胶和云产品卫星数据与大气辐射传输模式RSTAR,进行了晴空和有云条件下地表太阳辐射计算,并与香河综合辐射站的地基辐射测量值相比较。分析表明,晴空下二者相关性较好,相关系数平方R~2值为0.95,均方根误差RMSE为38.8 W/m~2。有云条件下,计算结果较差于晴空条件下,R~2值为0.88,RMSE为88.2 W/m~2。观测显示,香河站云—气溶胶共存现象较多,而MODIS仅按单一层的云进行微物理参数反演,导致模式输入参数误差,给地表太阳辐射计算结果引入误差。为了分析云-气溶胶共存状态对计算地表太阳辐射的影响,利用RSTAR计算了不同光学厚度的云和气溶胶在特定波段卫星观测的辐亮度值,并对于特定波段卫星接收的辐亮度值,用不同垂直结构的云和气溶胶分别反演其光学和微物理参数,再利用反演的结果分别计算相应的地表太阳辐射。结果表明:相对于单一云层的反演结果,云下气溶胶光学厚度(AOD)为0.1时,由反演误差所导致的地表太阳辐射估算误差较小;而随着AOD增加影响明显增大,在AOD为1.2时,相对误差达17.79%~18.38%。对于污染较重的华北地区而言,分析云覆盖下的气溶胶对地表太阳辐射的影响,有助于提高有云条件下地表太阳辐射的计算精度。
The MODIS aerosol product and cloud product data are combined with the atmospheric radiation transmission model RSTAR to calculate the surface solar radiation under sunny and cloudy conditions.The results are compared with the ground observed values of Xianghe integrated radiation station.It shows that the simulated value and observed value have good correlation.The R~2 and RMSE are 0.95 and 38.8W/m~2 in the clear skies,while 0.88 and 88.2 W/m~2 in the cloudy skies.The results show that more cloud-aerosol mixed states is in Xianghe station,while MODIS can only invert single microphysical parameter of cloud layer,which leads to error of model input parameter,bringing error to the calculation result of surface solar radiation.In order to quantitatively analyze the effect,the RSTAR radiation model was used to calculate the radiance values,and invert f different cloud and aerosol optical thickness,calculating surface solar radiation.The results show that the error of estimation of surface solar radiation is 1.29%~1.56% when the aerosol optical thickness(AOD)is 0.1,compared with the single layer.With the increase of AOD,the effect of AOD increased obviously.The relative error was 17.79%~18.38% when AOD was 1.2.For the heavily polluted areas of North China,it is important to analyze the influence of aerosol on the surface solar radiation under cloud cover,which is very important to improve the calculation accuracy of surface solar radiation under cloud conditions.
The MODIS aerosol product and cloud product data are combined with the atmospheric radiation transmission model RSTAR to calculate the surface solar radiation under sunny and cloudy conditions.The results are compared with the ground observed values of Xianghe integrated radiation station.It shows that the simulated value and observed value have good correlation.The R~2 and RMSE are 0.95 and 38.8W/m~2 in the clear skies,while 0.88 and 88.2 W/m~2 in the cloudy skies.The results show that more cloud-aerosol mixed states is in Xianghe station,while MODIS can only invert single microphysical parameter of cloud layer,which leads to error of model input parameter,bringing error to the calculation result of surface solar radiation.In order to quantitatively analyze the effect,the RSTAR radiation model was used to calculate the radiance values,and invert f different cloud and aerosol optical thickness,calculating surface solar radiation.The results show that the error of estimation of surface solar radiation is 1.29%~1.56% when the aerosol optical thickness(AOD)is 0.1,compared with the single layer.With the increase of AOD,the effect of AOD increased obviously.The relative error was 17.79%~18.38% when AOD was 1.2.For the heavily polluted areas of North China,it is important to analyze the influence of aerosol on the surface solar radiation under cloud cover,which is very important to improve the calculation accuracy of surface solar radiation under cloud conditions.
引文
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[17]Fan X H,Xia X G,Chen H B.Comparison of Column-Integrated Aerosol Optical and Physical Properties in an Urban and Suburban Site on the North China Plain[J].Advances in Atmospheric Sciences,2015,32(4):477-486
[18]Shi Guangyu,Xu Li,Guo Jiandong.High-altitude Balloon Detection of Vertical Distribution of Atmospheric Ozone and Aerosol[J].Chinese Journal of Atmospheric Sciences,1996,20(4):401-407.[石广玉,许黎,郭建东.大气臭氧与气溶胶垂直分布的高空气球探测[J].大气科学,1996,20(4):401-407.]
[19]Sun Qiang,Fan Xuehua,Xia Xiang,ao.Observation and Analysis of Vertical Distribution of Aerosol in North China[J].Meteorology and Environmental Sciences,2016,39(1):26-33.[孙强,范学花,夏祥鳌.华北地区气溶胶垂直分布特征的观测与分析[J].气象与环境科学,2016,39(1):26-33.]
[2]Chen Weiming,Bian Duo,Yu Fan.Measurement of Direct Solar Radiation and Scattering Radiation in Clear Sky by Satellite Data[J].ActaMeteorologicaSinica,2000,58(4):457-469.[陈渭民,边多,郁凡.由卫星资料估算晴空大气太阳直接辐射和散射辐射[J].气象学报,2000,58(4):457-469.]
[3]Yu Yu,Xia Xiang’ao,Chen Hongbin,et al.Comparison of Solar Shortwave Radiation Observation and Pattern in Clear Sky[J].ActaEnergiae Solaris Sinica,2007,28(3):233-240.[余予,夏祥鳌,陈洪滨,等.晴空大气太阳短波辐射观测与模式比较[J].太阳能学报,2007,28(3):233-240.]
[4]Chen Hongbin.Abnormal Absorption of Solar Radiation by Clouds and Clouds[J].Chinese Journal of Atmospheric Science,1997,21(6):750-757.[陈洪滨,关于云和云天大气对太阳辐射的吸收异常[J].大气科学,1997,21(6):750-757.]
[5]Hu Liqin,Liu Changsheng.Effects of Clouds and Aerosols on Atmospheric Absorption of Solar Radiation[J].Plateau Meteorology,2001,20(3):264-270.[胡丽琴,刘长盛.云层与气溶胶对大气吸收太阳辐射的影响[J].高原气象,2001,20(3):264-270.]
[6]Wei Heli,Xu Qingshan,Zhang Tianshu.GMS-5 Meteorological Satellite for Remote Sensing of Total Solar Radiation[J].Journal of Remote Sensing,2003,7(6):465-471.[魏合理,徐青山,张天舒.用GMS-5气象卫星遥测地面太阳总辐射[J].遥感学报,2003,7(6):465-471.]
[7]Takenaka H,Nakajima T Y,Higurashi A,et al.Estimation of Solar Radiation Using a Neural Network based on Radiative Transfer[J].Journal of Geophysical Research:Atmospheres 116(D8).
[8]Quan Weijun,Chen Hongbin,Guo Liwen,et al.Comparison of Two Parameterized Models of Net Solar Radiation Inversion in Beijing[J].ActaMeteorologicaSinica,2009,(4):623-630.[权维俊,陈洪滨,郭利文,等.两种反演地表净太阳辐射的参数化模式在北京地区的比较[J].气象学报,2009,(4):623-630.]
[9]Zhang Wenxing,LüDaren,Wang Pucai.Observation and analysis of atmospheric aerosol optics in Beijing area[J].Chinese Journal of Environmental Science,2002,22(6):495-500.[章文星,吕达仁,王普才.北京地区大气气溶胶光学后的的观测和分析[J].中国环境科学,2002,22(6):495-500.]
[10]Lin C G,Yang K,Huang J P,et al.Impacts of Wind Stilling on Solar Radiation Variability in China[J].Scientific Reports,2015,5.doi:10.1038/srep 15135.
[11]Hutchison K D,Hauss B,Iisager B D,et al.Differentiating between Clouds and Heavy Aerosols in Sun-glint Regions[J].Journal of Atmospheric and Oceanic Technology,2010,27(6):1085-1094.
[12]Shang H Z,Chen L F,Tao J H,et al.Synergetic Use of MODIS Cloud Parameters for Distinguishing High Aerosol Loadings from Clouds Over the North China Plain[J].IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,2014,7(12):4879-4886.
[13]Nakajima T,Tanaka M.Matrix Formulations for the Transfer of Solar Radiation in a Plane-parallel Scattering Atmosphere[J].Journal of Quantitative Spectroscopy and Radiative Transfer,1986,35(1):13-21.
[14]NakajimaT,Tanaka M.Algorithms for Radiative Intensity Calculations in Moderately Thick Atmospheres Using a Truncation Approximation[J].Journal of Quantitative Spectroscopy and Radiative Transfer,1988,40(1):51-69.
[15]Frey R A,Ackerman S A,Liu Y,et al.Cloud Detection with MODIS.PartⅠ:Improvements in the MODIS Cloud Mask for Collection 5[J].Journal of Atmospheric and Oceanic Technology,2008,25(7):1057-1072.
[16]Ackerman S,Holz R,Frey R,et al.Cloud Detection with MODIS.PartⅡ:Validation[J].Journal of Atmospheric and Oceanic Technology,2008,25(7):1073-1086.
[17]Fan X H,Xia X G,Chen H B.Comparison of Column-Integrated Aerosol Optical and Physical Properties in an Urban and Suburban Site on the North China Plain[J].Advances in Atmospheric Sciences,2015,32(4):477-486
[18]Shi Guangyu,Xu Li,Guo Jiandong.High-altitude Balloon Detection of Vertical Distribution of Atmospheric Ozone and Aerosol[J].Chinese Journal of Atmospheric Sciences,1996,20(4):401-407.[石广玉,许黎,郭建东.大气臭氧与气溶胶垂直分布的高空气球探测[J].大气科学,1996,20(4):401-407.]
[19]Sun Qiang,Fan Xuehua,Xia Xiang,ao.Observation and Analysis of Vertical Distribution of Aerosol in North China[J].Meteorology and Environmental Sciences,2016,39(1):26-33.[孙强,范学花,夏祥鳌.华北地区气溶胶垂直分布特征的观测与分析[J].气象与环境科学,2016,39(1):26-33.]