Author(s)

F. Polla Mattiot & E. Scafe

Abstract

A study on the effect of rain on atmospheric pollutants in the city of Rome from 1994 to 1996 has been conducted based on data collected by governmental monitoring stations located in different areas of the city. In the city of Rome, the average annual precipitation value is over 700 mm, referring to measurements collected from over a century. Almost every month exhibits at least one rainy day. Days have been divided into two categories: rainy days, if it has rained at least 2 mm in the day, and days with no rain, in the other cases. Particulate matter concentration has been averaged every month in both categories. The difference between the two monthly values has been divided by the days-with- no-rain average to calculate the monthly

Keywords