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    Detection of the trend and seasonal variation in tropospheric NO2 over China

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    Authors
    Van der A, R.J.
    Peters, D.H.M.U.
    Eskes, H.
    Boersma, K.F.
    Van Roozendael, M.
    De Smedt, I.
    Kelder, H.M.
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    Discipline
    Earth and related Environmental sciences
    Subject
    Atmospheric chemistry
    Atmospheric composition
    Gas emissions
    Meteorological instruments
    Nitrogen oxides
    Troposphere
    atmospheric plume
    atmospheric pollution
    detection method
    GOME
    human activity
    satellite imagery
    seasonal variation
    troposphere
    Asia
    China
    Eurasia
    Far East
    Audience
    Scientific
    Date
    2006
    Metadata
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    Description
    The results of a trend study on the tropospheric NO2 column over China are presented, on the basis of measurements from the satellite instruments GOME and SCIAMACHY. From these observations, monthly averaged tropospheric NO2 distributions are determined for the period 1996 to 2005 on a 1° by 1° grid. A linear model with a seasonal component is used to fit these time series. The variance and the autocorrelation of the noise are used to calculate the significance of the trend. The results show a large growth of tropospheric NO2over eastern China, especially above the industrial areas with a fast economical growth. For instance, Shanghai had a linear significant increase in NO2 columns of 20% ± 6% per year (reference year 1996) in the period 1996-2005. The seasonal pattern of the NO2 concentration shows a difference between east and west China. In the east a NO2 maximum is found during wintertime, because of chemistry and anthropogenic activity. Contrary to this, in the western part of China the NO2 concentration reaches a maximum in summertime. This spatial difference correlates with the population distribution of China. Since there is negligible anthropogenic activity in west China this difference in seasonality of NO2 is attributed to natural emissions in west China.
    Citation
    Van der A, R.J.; Peters, D.H.M.U.; Eskes, H.; Boersma, K.F.; Van Roozendael, M.; De Smedt, I.; Kelder, H.M. (2006). Detection of the trend and seasonal variation in tropospheric NO2 over China. , Journal of Geophysical Research Atmospheres, Vol. 111, Issue 12, D12317, DOI: 10.1029/2005JD006594.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/4499
    doi: http://dx.doi.org/10.1029/2005JD006594
    scopus: 2-s2.0-33646348356
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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