Trend detection in satellite observations of formaldehyde tropospheric columns
De Smedt, I.
Van Der A, R.J.
Van Roozendael, M.
Earth and related Environmental sciences
Volatile organic compounds
Non-methane volatile organic compounds
volatile organic compound
Tokyo [Tokyo (PRF)]
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Being an intermediate product in the oxidation of a large number of non-methane volatile organic compounds (NMVOCs), formaldehyde (H
2CO) is a useful indicator of biogenic, pyrogenic and anthropogenic hydrocarbon emissions. We present the first trend study performed on H 2CO satellite columns, retrieved from the GOME and SCIAMACHY instruments between 1997 and 2009. A linear model with a seasonal component is used to fit the time series of monthly averaged columns. The error and statistical significance of the inferred trends are estimated. The study focuses on Asia but results are also provided for large cities worldwide. Statistically significant positive trends of formaldehyde columns are observed over northeastern China (4% yr -1) and India (1.6% yr-1), related to strong increases in anthropogenic NMVOC emissions, whereas negative trends of about -3% yr -1 are observed over Tokyo as well as over cities of the northeast U.S. urban corridor as a result of effective pollution regulation measures. © 2010 by the American Geophysical Union.
CitationDe Smedt, I.; Stavrakou, T.; Müller, J.-F.; Van Der A, R.J.; Van Roozendael, M. (2010). Trend detection in satellite observations of formaldehyde tropospheric columns. , Geophysical Research Letters, Vol. 37, Issue 18, L18808, DOI: 10.1029/2010GL044245.