Trends, seasonal variability and dominant NO x source derived from a ten year record of NO 2 measured from space

作者：R. J. van der A, Henk Eskes, K. F. Boersma, Twan van Noije, Michel Van Roozendaël, Isabelle De Smedt, D. H. M. U. Peters, E. W. Meijer · 发表于：Journal of Geophysical Research Atmospheres · 年份：2008 · DOI：10.1029/2007jd009021 · 被引用次数：494 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Atmospheric Ozone and Climate

For the period 1996–2006, global distributions of tropospheric nitrogen dioxide (NO 2 ) have been derived from radiances measured with the satellite instruments GOME (Global Ozone Monitoring Experiment) and SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CartograpHY). A statistical analysis is applied to derive trends and seasonal variability for this period on a global scale. The time series of the monthly NO 2 columns for these ten years have been fitted with a linear function superposed on an annual seasonal cycle on a grid with a spatial resolution of 1° by 1°. We see significant reductions (up to 7% per year) in NO 2 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. By comparing the data with the cloud information derived from the same satellite observations, the contribution of lightning to the total column of NO 2 is estimated. The estimated NO 2 from lightning is, especially in the tropics, in good agreement with lightning flash rate observations from space. The satellite observed seasonal variability of NO 2 generally correlates well with independent observations and estimates of the seasonal cycle of specific NO x sources. Source categories considered are anthropogenic (fossil fuel and biofuel), biomass burning, soil emissions and lightning. Using the characteristics of the seasonal variability of these source categories, the dominant sourc...