乾安县LAS数据与未来降水关系的统计检验  

Statistical Tests on the Relationship between LAS Data and Rain Forecast in Qianan County

作　　者：支克广[1] 涂钢[1] 付光极 王建平 

机构地区：[1]吉林省气象科学研究所,长春130062 [2]乾安县气象局,乾安131400

出　　处：《气象水文海洋仪器》2007年第4期35-37,共3页Meteorological,Hydrological and Marine Instruments

摘　　要：在LAS输出数据的低谷常对应有降水天气出现,为确定这种关系在降水预报中是否有应用价值,对每日中午LAS数据的高值和低值和未来32h晴雨的关系作统计检验。首先根据数据随季节的变化,确定每月高和低的分界线。然后用X^2检验法,检验高值后的晴雨概率和低值后的晴雨概率有否明显区别。检验结果表明,高值和低值之后出现晴雨天气的概率差异显著,各个月得到的统计量X^2的值,全部通过X_(0.005)~2的临界值。It was noticed that the low trough of LAS data often corresponded to the rainfall weather. So the statistical tests were made on the relationship between the LAS data and the weather （rain or no rain） in the next 32hours, here we use the high and low of LAS data at noon. According to the seasonal variation of the LAS data, the monthly high and low thresholds were decided and then X^2 statistical test was adopted. The results showed that the probability of rain or no rain following high and low LAS value is quite different, all the X^2 statistical value passed the threshold of X0.005^2.

关 键 词：LAS 未来降水 统计检验 

分 类 号：P404[天文地球—大气科学及气象学]