AMDAR气温资料和常规高空观测气温资料的对比分析  

Comparative Analysis of Temperature Data Obtained by AMDAR and Conventional Radiosonde

作　　者：罗林艳 罗宇[2] 钟艳雯 朱亮 Luo Linyan;Luo Yu;Zhong Yanwen;Zhu Liang(Hu＇ nan Meteorological Information Center,Changsha 410118,China;Hunan Branch of China Meteorological Administration Training Center,Changsha 410125,China)

机构地区：[1]湖南省气象信息中心,长沙410118 [2]中国气象局气象干部培训学院湖南分院,长沙410125

出　　处：《气象与环境科学》2018年第3期115-119,共5页Meteorological and Environmental Sciences

基　　金：湖南省气象局2016年短平快课题(XQKJ16B038)资助

摘　　要：为了解飞机观测气象资料(AMDAR资料)的可用性,推进AMDAR资料在湖南气象预报业务中的应用,对2013年5月至2016年12月的AMDAR资料时空分布特征进行了分析,并参考美国国家环境预报中心(NCEP)提供的AMDAR资料质量控制方法,对AMDAR气温资料进行质量控制,并在此基础上对湖南范围内的AMDAR气温资料和常规高空观测气温资料(长沙、怀化、郴州)进行了对比分析。结果表明:我国AMDAR资料主要分布在100 h Pa气压层以下,起飞和降落阶段资料约占68. 75%。AMDAR气温资料数据质量稳定,气温疑误率低于0. 13%。在对比样本上,AMDAR观测气温(t_a)与常规高空观测气温(ts)存在非常显著相关性,相关系数为0. 9966,均方根误差为1. 065℃,AMDAR观测气温平均偏低0. 13℃,差值呈准正态分布,且73. 76%的差值在-1~1℃。AMDAR观测气温与常规高空观测气温的差值分布与飞行状态和飞行高度相关,上升状态AMDAR气温偏高,下降状态AMDAR气温偏低。500 h Pa高度以下,样本飞行状态多为下降,t_a较ts平均偏低0. 25℃; 500h Pa高度以上,样本飞行状态多为上升和平飞,t_a较ts平均偏高0. 03℃。In order to learn the usability of Aircraft Meteorological Data Relay （AMDAR） and accelerate its use in Hu’nan meteorological forecast operation, we summarize the temporal and spatial distribution of AMDAR data from May 2013 to December 2016, check the quality based on the quality control method of NCEP, and then analyze the temperatures from AMDAR and conventional radiosonde （Changsha, Huaihua, Chenzhou） in Hu’nan comparatively. The result shows that all AMDAR data locate under 100 hPa level and about 68.75% data is observed in take off and landing phase. The quality of AMDAR temperature data is stable with error rate less than 0.13%. On the contrast samples, AMDAR temperature （ta） and radiosonde temperature （ts） are correlated well with correlation coefficients of 0.9966 and RMS error of 1.065 ℃. The average bias of AMDAR temperature is -0.13 ℃, shows approximately normal distribution, 73.76% ranges from -1 to 1 ℃. The average deviation between ta and ts relies on the flight phase and altitude, ta is greater than ts when flights take off and ta is less than ts when flights land in general. Under 500 hPa, ta is lower by 0.25 ℃ due to the landing samples are majority. Above 500 hPa, ta is greater by 0.03 ℃ due to the take off and level flight samples are majority.

关 键 词：AMDAR资料 质量控制 高空观测 气温 回归分析 

分 类 号：P412.2[天文地球—大气科学及气象学]