One of the parameter that effected to ozone were aerosol that can be stated by Aerosol Index and also Cloud that can be refer to cloud fraction. In January and February there is a decrease of total ozone by average of 246,6 DU and 241,5 compared with March and April with average 251,0 DU and 255,2 DU, This is caused by higher cloud fraction and also aerosol index on January and February 2009. › Full Article...