摘要
分析了自动24次与人工24次观测日平均值间以及人工24次与4次观测日平均值间的差异。评估中涉及到的统计方法主要是两组样本平均值显著差异的t检验。研究表明:人工24次与4次观测差异分析中,近半数台站相对湿度存在显著差异;气温、气压2、min风速存在显著差异的台站分别为1.5%、0%和6.9%。并且,气温和气压差值场显示出较明显地区分布差异。自动24次与人工24次观测差异分析中,日平均气温和气压存在显著差异台站分别为0%和2.5%,相对湿度和2 min风速存在显著差异的台站分别达76.2%和78.7%。两种不同的观测仪器对这两个要素的差异影响比较普遍和显著。
An analysis is made of the differences between automatic and manual daily mean meteorological measurements（24 times per day and 4 times per day,respectively）,and the t-test method is used to determine whether there is distinct difference between the means of two samples.The analysis of differences between 24-times-per-day and 4-times-per-day observations show that there is remarkable deference in relative humidity for about half stations,and there is remarkable deference in daily temperature,pressure and 2-min wind speed at a confidence level of 0.05 for 1.5%,0 and 6.9% of stations,respectively.Moreover,there are evident local characteristics in temperature and pressure differences.The analysis of differences between 24-times-per-day automatic observation and 24-times-per-day manual observation indicates that there is remarkable deference in daily mean temperature and pressure for 1.5%,0 and 6.9% of stations,respectively,and in relative humidity and 2-min wind speed for 76.2% and 78.7% of stations,respectively.It is obvious that the impact of two kinds of observation instruments is universal and prominent
出处
《气象科技》
北大核心
2011年第4期462-467,共6页
Meteorological Science and Technology
关键词
自动观测
人工观测
国家气候基准站
AWS（automatic weather station）
manual observation
national base station
