| 天津市秋季典型环境污染过程个例分析 |
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| 引用本文： | 张晓云,郭虎,易笑园,张广泉,汪靖.天津市秋季典型环境污染过程个例分析[J].辽宁气象,2012(4):33-37. |
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| 作者姓名： | 张晓云 郭虎 易笑园 张广泉 汪靖 |
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| 作者单位： | [1]天津市气象局,天津300074 [2]国家海洋局南海工程勘察中心,广东广州510031 |
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| 基金项目： | 国家自然科学基金（41075030）资助 |
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| 摘 要： | 选择天津市秋季典型PM10污染过程2010年10月3—12日环境空气质量监测资料和常规气象资料、探空资料及NCEP资料,研究大气环境天气背景场、大气层结稳定度的特征及其对污染过程的影响。结果表明：高低空环流背景场与污染过程密切相关。在污染上升阶段,层结稳定度迅速增加,500 hPa高空处于槽前,地面在华北地形槽中,高低空风速辐合;在污染峰值阶段,层结稳定,逆温层加强,环流场稳定少变,地面风力微弱;在污染下降阶段,层结稳定程度骤降,地面冷锋和高空槽过境,降水出现,高低空偏北风增大。同时,PM10污染过程与多项层结稳定度参数显著相关,与对流凝结高度单相关系数为0.84,因此,高低空环流背景场的配置和层结稳定度变化是PM10污染出现的主要原因。
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| 关 键 词： | PM10 天气背景场 层结稳定度 温度 气压 |
A case study on a typical environment pollution process in autumn over Tianjin area |
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| ZHANG Xiao-yun,GUO Hu,YI Xiao-yuan,ZHANG Guang-quan,WANG Jing.A case study on a typical environment pollution process in autumn over Tianjin area[J].Liaoning Meteorological Quarterly,2012(4):33-37. |
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| Authors: | ZHANG Xiao-yun GUO Hu YI Xiao-yuan ZHANG Guang-quan WANG Jing |
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| Institution: | 1(1.Tianjin Meteorological Service,Tianjin 300074,China;2.South China Sea Marine Engineering Surveying Center,State Oceanic Administration,Guangzhou 510031,China) |
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| Abstract: | Based on the environmental air quality monitoring data,the conventional meteorological data,the sounding data and the NCEP reanalysis data,a typical pollution process in Tianjin during October 3-12,2010 was analyzed.The synoptic background field of atmospheric environment,the atmospheric stratification stability and its effect on the pollution process were discussed.The results indicate that the pollution process is closely relative to the upper and lower environmental background fields.During the increasing stage of pollution concentration,the stratification stability increases rapidly,and the upper level situation field at 500 hPa is located in the front of the trough,the surface situation field is in the topographic trough of North China,and the upper and lower wind speed converges.During the stage of pollution concentration summit,the atmospheric stratification and the environmental background are stable,the inversion layer is strong,and the surface wind is weak.During the decreasing stage of pollution concentration,atmospheric stratification becomes unstable quickly;the surface cold front and upper trough pass over Tianjin area,precipitation occurs and the upper and lower north wind are enhanced.Meanwhile,PM10 pollution process is significantly correlated with multiple stratification stability parameters and its correlation coefficient with convective condensation level is 0.84.As a result,the configuration of upper and lower environmental background and the variability of atmospheric stratification are the main reasons causing the PM10 pollution. |
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| Keywords: | PM10 Synoptic background field Atmospheric stratification stability Temperature Air pressure |
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