重慶市空氣污染擴散氣象條件指標研究
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“重慶主城區空氣質量潛勢綜合指標方法研究”項目資助


Index of Meteorological Conditions for Pollutant Diffusion in Chongqing
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    摘要:

    根據地面常規要素、L波段雷達探測資料風速和溫度與污染指數(API:Air Pollution Index)的相關性,建立空氣污染擴散條件的綜合氣象指數(〖WTBX〗A〖WTBZ〗),按指數大小分類確定潛勢預報指標,并應用歷史同期氣候概率作空氣污染潛勢預報。通過相關分析發現:與API關系密切的不是20:00的氣象要素而是08:00的氣象要素;地面要素中,對污染物濃度影響最大的是08:00的24 h變壓,而溫度的高低對API影響因季節而不同;L波段雷達資料中,150 m風速、300 m和地面溫差與API相關性較好。由相關性好的上述3個要素構造的綜合氣象指數及確定的擴散條件預報指標是合理的,在實際業務預報中,預報效果較好。

    Abstract:

    According to the relationship between conventional observational data, Lband radar data, and Air Pollution Index (API), an index of meteorological conditions for pollutant diffusion (Index 〖WTBX〗A〖WTBZ〗) for Chongqing is established, which consists of three meteorological elements and can be used to determine the pollution potential through grading by diagnosing the climatic probability in the corresponding periods. The correlation analysis indicates that there is close relationship between API and meteorological data at 08:00, not at 20:00; among the surface meteorological factors, the correlation coefficient between API and the 24hour pressure variation at 08:00 is the largest, and the effect of temperature on API is different in various seasons; the wind velocity at 150 meters and the temperature difference between the ground and 300 meter height exhibit good relationship with API in the Lband radar data. Index 〖WTBX〗A 〖WTBZ〗is therefore composed of the 24hour pressure variation at 08:00, the wind velocity at 150 meters, and the temperature difference between the ground and 300meter height. The application proved that Index A is reasonable and performs well in the operational service.

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胡春梅,劉德,陳道勁.重慶市空氣污染擴散氣象條件指標研究[J].氣象科技,2009,37(6):665~669

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  • 收稿日期:2008-03-20
  • 定稿日期:2009-05-06
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