Physics
Scientific paper
Sep 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3718808d&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 18, CiteID L18808
Physics
Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Global Change: Remote Sensing (1855), Atmospheric Composition And Structure: Evolution Of The Atmosphere (1610, 8125), Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251)
Scientific paper
Being an intermediate product in the oxidation of a large number of non-methane volatile organic compounds (NMVOCs), formaldehyde (H2CO) is a useful indicator of biogenic, pyrogenic and anthropogenic hydrocarbon emissions. We present the first trend study performed on H2CO 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.
de Smedt Isabelle
Müller Jean-François
Stavrakou T.
Van Der Ronald Johannes A.
van Roozendael Michel
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