Continental and Global Distribution of PM

Contact: Rudolf Husar, rhusar@mecf.wustl.edu

•Global Pattern of Haze Based on Visibility Data

•Resource Links

Global Pattern of Haze Based on Visibility Data

• A rough indicator of PM2.5 concentration is the extinction coefficient corrected for weather conditions and humidity. There are over 7000 qualified surface-based visibility stations.

• The June-August haze is most pronounced in Southeast Asia and over Sub-Saharan Africa, where the seasonal average PM2.5 is estimated to be over 50 g/m3.

• Interestingly, the industrial regions of the world such as over Eastern North America, Europe and

China-Japan exhibit only moderate levels of haze.

Resource Links

• Workbook Table of Contents

• Comment and Feedback Page

• Applications / Reports

• Data sets used in the Applications

• Methods and tools used in the Applications