中文摘要：

北方中国平原(NCP ) 最近由于都市化和快速的经济生长的过程由于提高的煤气的污染物质排出物面对了严肃的空气质量问题。在 NCP 探索地区性的空气污染，表面臭氧的大小(O ³), 氮氧化物(没有 ^x ), 和硫二氧化物(²) 因此在在北京和天津的成双的大城市之间的一个农村地点(Xianghe ) 从 5 月被执行到 2013 年 11 月。最高，时时，臭氧一般水准在 5 月接近了 240 ppbv，在 6 月和 7 月由约 160 ppbv 列在后面。高臭氧事件比在 2005 更著名并且主要在弄脏的 NCP 的内地从城市簇与空气包裹被联系到这个地点的西南。为没有 ^x , 一位重要臭氧先锋，集中在秋天在夏天和超过 400 ppbv 从几 ppbv 到将近 180 ppbv。高度的出现没有 ^{在平静条件下面的 x} 集中显示本地排出物在 Xianghe 是主导的。双山峰日报在没有 ^x 集中和没有 / 没有 ^x 比率被源于的本地排出物，光化学的移动，和冲淡可能塑造日报表面风速度和边界层的变化高度。 A 读了因此²白天山峰被注意并且归因于向下混合从一那么 ²-rich 层在上面当从可能的排放搬运的 SO ²-polluted 空气团采购原料时，它不同在之间非加热(9月和10月)并且加热(11月)时期，被认为为夜间负责高集中。

英文摘要：

The North China Plain （NCP） has recently faced serious air quality problems as a result of enhanced gas pollutant emissions due to the process of urbanization and rapid economic growth. To explore regional air pollu- tion in the NCP, measurements of surface ozone （O3）, nitrogen oxides （NOx）, and sulfur dioxide （SO2） were car- ried out from May to November 2013 at a rural site （Xianghe） between the twin megacities of Beijing and Tianjin. The highest hourly ozone average was close to 240 ppbv in May, followed by around 160 ppbv in June and July. High ozone episodes were more notable than in 2005 and were mainly associated with air parcels from the city cluster in the hinterland of the polluted NCP to the southwest of the site. For NOx, an important ozone precur- sor, the concentrations ranged from several ppbv to nearly 180 ppbv in the summer and over 400 ppbv in the fall. The occurrence of high NOx concentrations under calm condi- tions indicated that local emissions were dominant in Xianghe. The double-peak diurnal pattern found in NOx concentrations and NO/NOx ratios was probably shaped by local emissions, photochemical removal, and dilution re- sulting from diurnal variations of surface wind speed and the boundary layer height. A pronounced SO2 daytime peak was noted and attributed to downward mixing from an SO2-rich layer above, while the SO2-polluted air mass transported from possible emission sources, which differed between the non-heating （September and October） and heating （November） periods, was thought to be responsible for night-time high concentrations.