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Global air pollution crossroads over the Mediterranean
J Lelieveld1, H Berresheim, S Borrmann
1Max Planck Institute for Chemistry, Post Office Box 3060, 55020 Mainz, Germany. lelieveld@mpch-mainz.mpg.de
Science (New York, N.Y.)
|October 26, 2002
Summary
Air pollution layers were found up to 15 km during the 2001 Mediterranean Intensive Oxidant Study. Pollution exceeded standards in the boundary layer, impacting solar radiation and precipitation.
Area of Science:
- Atmospheric Chemistry
- Air Quality Research
- Environmental Science
Background:
- Air pollution layers extend from the surface to 15 km altitude.
- Pollution standards are exceeded in the Mediterranean boundary layer.
- Aerosol particles impact solar radiation and precipitation.
Purpose of the Study:
- To investigate air pollution layers and their sources in the Mediterranean region.
- To understand the vertical distribution of air pollutants.
- To assess the impact of pollution on solar radiation and precipitation.
Main Methods:
- The Mediterranean Intensive Oxidant Study was conducted in the summer of 2001.
- Analysis of air pollution layers from the surface to 15 km.
- Tracking of pollution sources from Europe, Asia, and North America.
Main Results:
- European pollution from the north exceeds boundary layer standards.
- Aerosol particles reduce solar radiation, potentially suppressing precipitation.
- Pollution from Asia and North America is transported into the middle troposphere.
- Asian pollution transported via monsoon pollutes the lower stratosphere.
Conclusions:
- The Mediterranean region experiences significant air pollution from multiple sources.
- Pollution has far-reaching effects, from surface air quality to the stratosphere.
- Understanding pollution transport is crucial for regional and global atmospheric studies.
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