During the past few years, air pollution in the Fenwei Plain (FWP) region had obviously rebounded. In this study, we used quantitative analysis, difference analysis, and correlation analysis methods to analyze the temporal and spatial distribution and the influence of the meteorological and climatic factors on haze pollution in FWP. The results showed that on the long‐term timescale, the haze pollution had an overall upward trend during the winter of 1984–2017, and the pollution became more serious after 2000. In addition, the differences in meteorological parameters such as relative humidity, sea level pressure, temperature, vertical velocity, and wind fields near the surface between the regional haze days and the regional clean days were remarkable, indicating that the changes in these meteorological parameters had a distinct impact on haze pollution. Among several atmospheric circulations in the Northern Hemisphere mid‐high latitudes, Eurasian (EU) pattern had the most obvious influence on haze pollution via two possible pathways: First, on the interannual timescale, the evolution of EU pattern affected the changes of Siberian high and Aleutian low pressure; second, changes in EU pattern could result in changes in wind speed at 850 hPa, boundary layer height and relative humidity in the lower troposphere. All these findings may provide some help for the government to take prevention measures for haze pollution in FWP.

中文翻译：

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1984-2017年the渭平原冬季烟霾污染特征及欧盟可能的影响

在过去几年中，en渭平原（FWP）地区的空气污染明显反弹。在这项研究中，我们使用定量分析，差异分析和相关性分析方法来分析时空分布以及气象和气候因素对FWP中烟霾污染的影响。结果表明，从长远来看，1984-2017年冬季雾霾污染总体呈上升趋势，2000年以后污染更加严重。此外，相对湿度，海洋等气象参数的差异在区域霾天和区域清洁日之间，地表附近的水平压力，温度，垂直速度和风场显着，表明这些气象参数的变化对雾霾污染有明显影响。在北半球中高纬度的几个大气环流中，欧亚（EU）模式通过两种可能的途径对霾的污染影响最明显：首先，在年际时间尺度上，EU模式的演变影响了西伯利亚高压的变化。阿留申低压；第二，EU模式的变化可能导致850 hPa的风速，边界层高度和对流层下部相对湿度的变化。所有这些发现可能为政府采取预防措施来预防FWP中的霾污染提供一些帮助。欧亚（EU）模式通过两种可能的途径对雾霾污染影响最明显：首先，在年际时间尺度上，EU模式的演变影响西伯利亚高压和阿留申低压的变化；第二，EU模式的变化可能导致850 hPa的风速，边界层高度和对流层下部相对湿度的变化。所有这些发现可能为政府采取预防措施来预防FWP中的霾污染提供一些帮助。欧亚（EU）模式通过两种可能的途径对雾霾污染影响最明显：首先，在年际时间尺度上，EU模式的演变影响西伯利亚高压和阿留申低压的变化；第二，EU模式的变化可能导致850 hPa的风速，边界层高度和对流层下部相对湿度的变化。所有这些发现可能为政府采取预防措施来预防FWP中的霾污染提供一些帮助。