数值模型中，污染指标计算和单位换算

1、pm2.5和pm10的计算

 PM10a=PM10+PM25a
 PM25a=PM25+BC+OC+SOA1+SOA2+SOA3+SOA4+SOA5+SOA6+ANA+ASO4+ANO3+ACL+ANH4 

或者：

names = (/"A25I","A25J","AECI","AECJ","ANH4I",\
      "ANH4J","ANO3I","ANO3J","AORGAI","AORGAJ",\
      "AORGBI","AORGBJ","AORGPAI","AORGPAJ",\
      "ASO4I","ASO4J","ASOIL","ACORS","ASEAS"/)

2、单位换算

1 ppm=1000ppb

1mg/m3=1000ug/m3

ppb---->>>ug/m3        n*分子量/22.4

ug/m3--->>>ppb          n*22.4/分子量