For the period 1996-2006 tropospheric nitrogen dioxide (NO₂) measurements from GOME and SCIAMACHY have been analyzed to derive trends and seasonal variability for this period on a global scale. We see significant reductions (up to 7% per year) in NO₂ in Europe and parts of the eastern United States, and a strong increase in Asia, most particularly in China (up to 29% per year) but also in Iran and Russia. For more details see