摘要
辐射误差订正是探空观测过程中最重要的误差订正之一,辐射误差订正方法的引入和订正方法的修改是造成中国探空温度资料非均一性问题的最主要原因。本文利用加拿大环境部开发的惩罚最大F检验(PMFT)方法,结合详细的元数据信息对中国区域123个探空台站的温度资料进行均一性检验和订正。结果表明:中国大多数探空台站均存在由于辐射误差订正方法改变造成的资料不连续问题。由于辐射误差订正方法改变造成中国探空温度序列产生的间断点数占总间断点数的46.17%。从订正幅度可知,00时统计得到的温度订正量值随高度增加,订正量均为负值,较高层次的温度订正量值明显大于低层的温度订正量值。
Radiation error correction is one of the most important error corrections in a radiosonde observation process. The addition and revision of radiation error corrections are the main reasons for the inhomogeneity of radiosonde temperature in China. Using penalized maximum F test （PMFT） methods developed by the Center of Environment in Canada and the detailed metadata of each radiosonde station in China, the inhomogeneity test and corrections were carried out based on the monthly temperature data at mandatory levels at 123 radiosonde stations in China. The results show that the most of temperature data series have a discontinuous problem caused by the change of radiation error correction methods. The breakpoints caused by the change of radiation error correction methods reach 46.17% of total breakpoints. The adjustment value of temperature at 00：00 UTC increases with height and it is negative, and it is larger at high mandatory level than in low mandatory level.
出处
《气象与环境学报》
2015年第4期103-106,共4页
Journal of Meteorology and Environment
基金
辽宁省气象局项目"完善云水资源人工增雨开发潜力评估方法"(201306)资助
关键词
辐射误差订正方法
探空温度资料
均一性检验
PMFT
Radiation error correction method
Radiosonde temperature data
Homogeneity test
Penalized maxi- mum F test （PMFT）
