Numerical Analysis of Long-Range Transport and Transformation over the East Asia.
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- UNO Itsushi
- National Institute for Environmental Studies
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- OHARA Toshimasa
- Institute for Behavioral Science
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- MORI Atsuko
- Nagasaki Prefectural Institute for Health and Environment
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- UTSUNOMIYA Akira
- Fukuoka Institute for Health and Environment Sciences
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- WAKAMATSU Shinji
- National Institute for Environmental Studies
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- MURANO Kentaro
- National Institute for Environmental Studies
Bibliographic Information
- Other Title
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- 東アジアスケールの長距離物質輸送・変質過程の数値解析
- ヒガシ アジア スケール ノ チョウキョリ ブッシツ ユソウ ヘンシツ カテイ
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Abstract
To understand the observed characteristics of long-range transport of pollutants in East Asia, an atmospheric transport model which includes detailed chemical reactions, the STEM (Sulfate Transport Eulerian Model; Carmichael et al, 1986), was applied. Model includes the detailed NH3-NO3-NH4 NO3 thermodynamical equilibrium mechanism and the heterogeneous reaction from SO2 (gas) to aerosol sulfate. Numerical simulation with STEM code was conducted from Feb. 4 to Feb. 28, 1992 and then the numerical results were compared with detailed high-time resolution (4-8 hour interval) aerosol monitoring data set at Tsushima, Ogori and Seoul.<BR>The STEM model successfully simulated the typical time variation of observed concentrations (both SO42- and NO3-). It was found that wind pattern variations associated with a synoptic scale pressure system are extremely important for the transport of pollutants. Sensitivity analysis shows that most of the observation data located within the heterogeneous reaction rate 0.5-2.0%/h. Model predicted the large fraction of HNO3 in Tsushima Island even in winter, which is because of the shortcoming of NH3 during the long-range transport over the ocean. Analysis of total dry deposition amount during the period of numerical simulation is also discussed.
Journal
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- Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi
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Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 32 (4), 267-285, 1997
Japan Society for Atmospheric Environment
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Details 詳細情報について
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- CRID
- 1390282679594758272
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- NII Article ID
- 110003841100
- 130004377183
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- NII Book ID
- AN10512108
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- ISSN
- 21854335
- 13414178
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- NDL BIB ID
- 4257437
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed