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Envisat monitoring China floods as part of Dragon Programme

ts gathered by the Global Monitoring Ozone Experiment (GOME) aboard ERS-2 since 1995, showing a steady increase in nitrogen dioxide levels in industrialised eastern China.

"For trend analyses it is important to have long time series of measurements in order to calculate a trend with enough significance," explained Dr. Ronald van der A of the Royal Dutch Meteorological Institute (KMNI). "By combining the GOME and SCIAMACHY observations we obtained a data set of nearly ten years, which was enough for our trend study. Although we had expected a positive trend in NO2 in China due to its booming economy, the magnitude of the trend, up to 25% per year for the Shanghai region was surprising."

In the west of the country the results show there are no artificial pollution sources, so that natural sources such as lightning and soil emissions are more significant.


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Contact: Mariangela D'Acunto
mariangela.dacunto@esa.int
39-694-180-856
European Space Agency
3-Aug-2005


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