沙尘PM_(10)质量浓度与气温的关系初探

Some Empirical Relationships Discovered Between Air Temperature and PM_(10) Concentration

利用甘肃民勤自动气象站观测的2004～2006年夏季的5 min一次的气温与沙尘PM10浓度资料,通过将数据分为实验组与对照组,研究了气温与沙尘天气之间的统计关系。个例显示,气温与沙尘PM10浓度之间存在降温、升温和混合型3种对应关系。实验组统计分析表明,气温及其变化(每5min间隔气温变化绝对值和每24 h间隔气温变化绝对值)与沙尘PM10浓度及其变化呈现出非常显著的正相关关系;沙尘暴天气下日平均气温变化与相应沙尘PM10浓度变化呈显著负相关。对照组结果表明,实验组统计关系是非常显著的。

The relationship between air temperature and sand - dust weather was studied by using automatic meteorological records of PM10 concentration and air temperature taken every 5 minutes at Minqin observational station from January 2004 to June 2006. The data were beforehand divided into two groups, namely experimental group and control group. Cases show that three corresponding types, namely, air temperature falling type, rising type and mixed type, existed between PM^o concentration and air temperature. The result from experimental group shows that PMI0 concentration and its change presented significantly positive statistical correlation with air tem- perature arid its change （5 - minute interval change and 24 - hour interval change）. The one - day - interval change of daily average air temperature correlated negativelv with PM,o concentration only under dust storm weather condition. At last, the obtained statistical rela-tionship was tested with the control group, which shows that it was still significant in this group.