逆推計手法を利用したNO<sub>x</sub>排出量インベントリの速報アップデート  [in Japanese] Application of Inversion Technique to Quick Update of Anthropogenic NO<sub>x</sub> Emission with Satellite Observations and Chemical Transport Model  [in Japanese]

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Abstract

衛星で観測された対流圏NO<sub>2</sub>カラム濃度を拘束条件に、逆推計手法を応用し、大気汚染物質排出インベントリREAS 2.1の人為起源NO<sub>x</sub>排出量を間近(2009~2013年5月)まで延伸した。衛星によって観測された中国東部の対流圏NO<sub>2</sub>カラム濃度は増加を続けていたが、2008~2009年は北京オリンピックや世界的景気後退の影響で濃度の伸びが停滞、2010年から再び増加に転じた。逆推計の結果得られたモデル対流圏NO<sub>2</sub>カラム濃度はこの年々変動(減少から増加)をよく再現した。逆推計によって推定された2009~2012年の中国人為起源NO<sub>x</sub>排出量はそれぞれ25.7、27.3、28.2、28.4 Tg/yearで、増加率は3.5%/year (0.9 Tg/year)となった。一方、REASによって見積もられた2005~2008年の増加率は7.2%/year (1.5 Tg/year)で、REASと今回の逆推計の期間(2005~2012年)の増加率は5.3%/year (1.1 Tg/year)であった。

We developed a quick update method for an emission inventory with an inverse technique, and extended the Chinese anthropogenic NO<sub>x</sub> emission in Regional Emission inventory in the ASia version 2.1 (REAS 2.1) through 2009–May 2013 with satellite observations and a chemical transport model. The satellite observations exhibited a drastic inter-annual variation in the tropospheric NO<sub>2</sub> vertical column densities (VCDs) over the eastern Chinese region depending on the socioeconomic conditions. The increase in the NO<sub>2</sub> VCD became sluggish during 2008–2009 due to pollutant controls by the 2008 Beijing Olympic game and the global depression, but revived in 2010 with a growth rate of 37.3%/year. A posteriori NO<sub>2</sub> VCD successfully reproduced the inter-annual variation in the observed one, and captured the observed seasonal cycle in which the seasonal peak and bottom appear in the winter and summer, respectively. The updated Chinese anthropogenic NO<sub>x</sub> emissions during 2009–2012 were 25.7, 27.3, 28.2, 28.4 Tg/year and fell within the range of the various estimates in the literature. We estimated an annual growth rate during 2009–2012 and 2005–2012 to be 3.5%/year (0.9 Tg/year) and 5.3%/year (1.1 Tg/year), respectively.

Journal

  • Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

    Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 50(5), 199-206, 2015

    Japan Society for Atmospheric Environment

Codes

  • NII Article ID (NAID)
    130005119600
  • NII NACSIS-CAT ID (NCID)
    AN10512108
  • Text Lang
    JPN
  • ISSN
    1341-4178
  • NDL Article ID
    026745213
  • NDL Call No.
    Z16-490
  • Data Source
    NDL  J-STAGE 
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