【作者】 陶士伟； 陈晓红； 龚建东；

【Author】 Tao shiwei1 Chen Xiaohong2 Gong Jiandong1 (1。National Meteorological Center, Beijing 10081;2。Anhui Meteorological Bureau)

【机构】 国家气象中心北京； 安徽省气象台；

【摘要】 我国探空观测业务已逐步用L波段探空仪取代59型探空仪。为了解L波段探空仪观测质量,利用观测资料减模式背景场的差的统计分析技术和贝塞尔函数拟合法分离观测误差技术,分析了2005年3-5月我国36个L波段探空仪探测的温度误差特性。结果表明,L波段和59型的观测资料减模式背景场平均偏差差别不大,一般都在0.2度之内。而温度随机误差在500-300hPa减小约0.2度,在00时300hPa以上,有更明显的减小,达0.4度,约占59型观测误差的四分之一。更多还原

【Abstract】 Up to June 2005, L band digital radiosondes are used in 36 air observation stations in china. In order to understand the observation error characters, the error analysis is made about the temperature of L band digital radiosonde. The observation data from March to may of 2005 are used. The mean and root mean square of the observation bias from the forecast of T213 model 6hours (OMB) are calculated. Bessel fitting technique are used to separating out observation error from OMB. The results show that comparing with 59 radiosonde observation data, there is no obvious difference(usually in 0.2 oC) in the mean of OMB. But a great reduce is made in random error of temperature of L band digital radiosonde: at 12Z and at 00Z 500-300hPa about 0.2-0.3 oC; at 00Z above 300hPa, about 0.4 oC, the 25%of the random error of temperature of 59 radiosonde.更多还原