Darrell Hudson

Clipping interesting articles & photos

Global Air Pollution Map

Pollution_map_25map

The first long-term global map of PM2.5 in a recent issue of Environmental Health Perspectives. Canadian researchers Aaron van Donkelaar and Randall Martin at Dalhousie University, Halifax, Nova Scotia, Canada, created the map by blending total-column aerosol amount measurements from two NASA satellite instruments with information about the vertical distribution of aerosols from a computer model.

Their map, which shows the average PM2.5 results between 2001 and 2006, offers the most comprehensive view of the health-sapping particles to date. Though the new blending technique has not necessarily produced more accurate pollution measurements over developed regions that have well-established surface-based monitoring networks, it has provided the first PM2.5satellite estimates in a number of developing countries that have had no estimates of air pollution levels until now.

Source: www.nasa.gov/topics/earth/features/health-sapping.html

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