FY-2F卫星和毫米波云雷达云高观测的个例对比分析
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摘要
风云二号静止卫星上装载有可见光、水汽、中长波红外等探测通道,其中红外通道资料可提供卫星云顶温度数据。基于FY-2F静止卫星云顶温度资料,结合局地实时探空数据对北京南郊和朝阳站点上空云层进行云高反演,并展开与地基毫米波云雷达探测云顶高关系的对比,分析3种不同云厚(薄云、适中、厚云)条件下的云高观测结果。研究结果表明,二者云顶高匹配度受几何云厚的影响,其吻合度呈现出厚云最佳,薄云最差的特征。
The FY-2 geostationary satellite spectral data consist of several detection channels,including visible,water vapor,medium-long wavelength infrared and multi-channel.Among these channels,the multi-channel data can provide satellite cloud top temperature data.This paper,based on FY-2 Fsatellite cloud top temperature data,combined with the local real-time ratiosonde data,retrieves the cloud top height from the satellite data of clouds over the southern suburbs of Beijing and makes comparison with the ground-based millimeter-wave cloud radar detection of cloud top height to analyze the cloud top height observation results under the three kinds of cloud thickness.The results indicate that the match degree of two sorts of measurements is affected by the geometric cloud thickness,and the coincidence degree shows the best for thick clouds and the worst for thin clouds.
The FY-2 geostationary satellite spectral data consist of several detection channels,including visible,water vapor,medium-long wavelength infrared and multi-channel.Among these channels,the multi-channel data can provide satellite cloud top temperature data.This paper,based on FY-2 Fsatellite cloud top temperature data,combined with the local real-time ratiosonde data,retrieves the cloud top height from the satellite data of clouds over the southern suburbs of Beijing and makes comparison with the ground-based millimeter-wave cloud radar detection of cloud top height to analyze the cloud top height observation results under the three kinds of cloud thickness.The results indicate that the match degree of two sorts of measurements is affected by the geometric cloud thickness,and the coincidence degree shows the best for thick clouds and the worst for thin clouds.
引文
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[2]Liou K N.An Introduction to Atmospheric Radiation[M].2nd ed.Beijing:China Meteorological Press,2004:382-388.
[3]Kim S W,Chung E S,Yoon S C,et al.(2011).Intercomparisons of cloud-top and cloud-base heights from ground-based Lidar,CloudSat and CALIPSO measurements[J].International Journal of Remote Sensing,32:4,1179-1197.
[4]张艳品,章文星,吕达仁,等.卫星(IASI探测仪)观测云顶高与地基云雷达观测的对比验证[J].大气科学,2014,38(5):874-884.
[5]周非非,周毓荃,王俊,等.FY-2卫星反演的云顶高度与多普勒雷达回波顶高的关系初探[J].气象,2010,36(4):43-50.
[6]李冠林,严卫,王蕊,等.基于A-Train综合资料的云顶高度反演研究[J].气象,2016,42(8):971-979.
[7]郭伟,刘磊.地基红外测云仪探测能力分析[J].气象科技,2016,44(6):860-866.
[8]何小东,周毓荃,胡志晋.利用地面资料计算云底高度的一种新方法[C]∥第十五届全国云降水与人工影响天气科学会议论文集,2008,731-734.
[9]胡树贞,陶法,马舒庆,等.地基主动式云自动观测设备外场对比试验[J].气象科技,2017,45(6):988-994.
[10]曹亚楠,魏合理,戴聪明,等.AIRS红外高光谱卫星数据反演卷云光学厚度和云顶高度[J].光谱学与光谱分析,2015,35(5):1208-1213.
[11]曹亚楠,魏合理,徐青山.基于MODIS云产品的北京地区卷云特性统计分析[J].大气与环境光学学报,2013,8(4):271-281.
[12]朱亚平,程周杰,刘健文,等.FY-2C静止气象卫星资料对不透明云云顶气压的反演研究[J].热带气象学报,2014,30(3):463-472.
[13]章文星,吕达仁.地基热红外云高观测与云雷达及激光云高仪的相互对比[J].大气科学,2012,36(4):657-672.