20140912

Author : Carlos A. Cuevas, Alberto Notario, Jose´ Antonio Adame, Andreas Hilboll, Andreas Richter, John P. Burrows & Alfonso Saiz-Lopez
Year : 2014
Title :  Evolution of NO2 levels in Spain from 1996 to 2012
Journal : Scientific reports
Comment : In this work, they report on the NO2 geographical distribution and concentration trends over Spain using combined multiple satellite datasets and ground-based observations from five metropolitan areas in the country: Madrid, Barcelona, Valencia, Sevilla and Bilbao. NOx emissions in a country or region are directly related to its industrial and economic development. The results in these five cities show a smooth decrease in the NO2 concentrations of, 2% per year in the period 1996–2008, due to the implementation of emissions control environmental legislation, and a more abrupt descend of,7% per year from 2008 to 2012 as a consequence of the economic recession.

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